DE2305606A1 - REMOTE READER - Google Patents

Description

Remote Reading Apparatus The invention relates to a remote reading apparatus for measuring devices such as flow meters, liquid and gas meters, energy meters, Electric meters and the like, in which the measuring device has facilities for displaying the measured values are included and one with the playback devices of the measuring device via electrical Reading unit that can be connected to cables for multi-digit, digital reading or recording of the measurement value is provided.

There are already various systems for remote reading of measuring devices known. Some of these remote reading devices (see U.S. Patents 3,046,534 and 3,069 670) are especially intended for reading flow meters and the like. Fttr the known Systems, it is typical that one is borne by the reader Reading unit is provided. To take a Bern reading, the reader connects the reading unit with a connection coupling, which is more convenient on the outside a building in which the measuring device is located can be arranged. These The connection coupling is via a multi-core connection cable with a value storage circuit connected to the equipment register. The storage circuit saves those added to it values supplied by the measuring device and transfers them to the reading unit if this the connection coupling is plugged in.

In addition to various shortcomings, they have known Bern reading devices the disadvantage that a considerable number of wires are required in the connecting cable is to make the connections between the above-mentioned connecting coupling and the remotely located storage or registration device on the measuring device. As far as previously adjusted measuring bridges to reproduce a counter wheel position in Meter registers were used, they were sensitive and needed relatively expensive precision electrical resistors to get accurate readings.

Another shortcoming of the known perimeter reading systems is the lack of them convenient consumer identification and the lack of a method of reproduction this identification together with the meter reading. In this context It must be taken into account that a reader usually has a large number of consumer installations visited, and therefore reliable consumer identification for correct billing required for each meter reading.

Another disadvantage of the known reading systems (compare in particular US-PS 3,069,670) is that the reading circuit requires manual operation, to read every tens digit of a multi-digit number registered by the meter.

It is therefore the object of the invention to remedy these deficiencies and errors. The following points should essentially be observed here: 1) It should to provide an improved remote reading device for a meter; 2) It a new type of remote metering device is to be created that has only a few connecting wires, for example only three wires between an information storage meter and a remote reading unit is required to read a plurality of, for example Read up to four different digital digits in one meter registration to be able to; 3) If measuring bridges for querying the position of a counter wheel or of another control element on the measuring device are used, such measuring bridges should be used in a novel way through the transition from one unbalanced state to another the bridge work.

4) A new type of remote reading device is to be created, which is suitable for connecting a reading unit to a remote reading unit Apply connection coupling, with a consumer installation identifying Data transmitter connected to this connection coupling or attached in this sein kanflc 5) A new type of reading device is to be created which is semi-automatic worked 6) A novel reading device is to be created that has a Counting mechanism for remote reading of the value registered on the measuring device and a Counter-driving circuit for automatic setting of the counter wheels for remote display of the value registered on the measuring device, if the counting mechanism is selective is reset.

7) A new type of remote reading device is to be created, which offers the possibility of a counting mechanism for remote display of the on the measuring device registered value and a recording device for recording the number displayed on the counter. The counter wheels of the counter should also be selectively adjustable to display a selected number, reducing the number of such Meters that are not set up for remote reading selectively register values is inserted into the counting mechanism and recorded by the recording device can be.

8) A new type of remote reading device is to be created, which makes it possible to equip a remote reading unit, a short-circuited or open circuit part in the device transmitting the data on the measuring device determine and display.

9) A new type of Bern reading unit is to be created which offers the possibility of a plurality of individually driven counter wheels provide, in which each counter wheel by pulses from a generator in the remote reading unit is driven to form a remote display of the value registered on the meter.

10) A new type of remote reading device is to be created, which has a data feed device on the measuring device and a reading unit, which is suitable to be electrically connected to the data feed device of the measuring device to be connected, whereby there should be the possibility of an impulse-responsive Counting mechanism and one Provide a pulse generator in the reading unit, to impulses to the data feeder and from there to the counting mechanism return.

The remote reading device is used to solve this problem according to the invention in that the devices added to the measuring device to display the measured value to output encrypted signals for their register position are designed, while the reading unit with devices for querying and converting these encrypted signals are fitted into a multi-digit digital reading is. In this novel remote reading device, the remote reading unit is included designed electrically with the signal emitting and encrypting, the measuring device to be connected to the attached device for displaying the measured value.

In a preferred embodiment of the invention, it contains the measuring device Enclosed device for reproducing the measured value emits one signal each and encoding circle for each digital order in the multi-digit to be read Decimal number. Each encryption circuit has a contact driven by the measuring device, or a closing element that corresponds to the meter output is rotated so that its position reflecting the measured value for the value in the decimal place assigned to it is decisive. Every contact element is assigned a number of data transmitter resistances of different values, and for each position representing a value, the contact element selects a different one Data transmitter resistor, and connects this to the connection to the remote reading unit leading line.

In the context of the invention, the selected data transmitter resistances for the various decimal places by a counter drive and follower circuit are switched on one after the other in one arm of a bridge circuit. The bridge circuit, the counter drive and follower circuit and a step variable Impedance can then form part of the remote reading unit.

The step-variable impedance can be a number of known resistances have which successively in another branch of the bridge circuit through a pulse driven sequence switch for comparison with those in the other Bridge branch lying data transmitter resistor are placed. The new remote control unit according to the invention can also contain a pulse generator, the result switch and the counter supplies the drive pulses, furthermore one by pulses driven counter mechanism in a plurality individually more to be driven Counter wheels, a count cycle control circuit for counting the number of cycles that the sequence switch in the step-variable impedance has executed a detector circuit for determining the state of the bridge and a recording device. As part of the Invention, the counter drive and follow-up circuit can be supplied by the generator Record pulses to drive the counting wheels of the remote reading counter in a sequence, which is determined by the counting cycle control circuit, and the number of times from the generator generated pulses that feed the counter drive and follower circuit to drive each wheel of the remote reading meter is controlled by the Detekt.orkreis.

According to the invention, it is possible to use the value that reflects the respective value Position of each contact element no longer by adjusting the bridge circuit ascertain. Instead, it is possible to do this by changing the output potential of the bridge ascertain from one unbalanced condition to another. This is done by choice the resistance values of the step-variable impedance and the data transmitter resistances in such a way allows the value of each encoder resistor to be between the values of two successive resistances in the step-variable impedance falls. The above-mentioned detector circuit thus represents a transition from an unbalanced one Bridge condition in another feast. Because of this way of working with an unbalanced bridge circuit The data transmitter resistors can be relatively cheap and do not have to be precision resistors be.

According to the invention, the counter drive and follower circuit can through the counting cycle control circuit can be controlled in such a way when a reading command is selectively fed, the counter drive and follower circuit automatically drives the counting wheels of the remote reader to its home position, then the dials of the remote reader in a previously selected sequence to read the output value on the measuring device drives and finally controls the recording device to the remote reading counter record the current registration.

In addition to recording the output on the measuring device and register value, the recording device can also provide an identification for the Calculate or record for other purposes. In the context of the invention, a such identification of the data transmitter must be contained in the connection coupling, to which a reading unit is optionally and removably attached. The connecting coupling, which can be designed, for example, in the form of a socket at a location which is usually removed from the measuring device, and from Ableser can be easily reached.

The connection coupling is via a connection cable with the encryption circuits of the data transmitter connected to the measuring device register.

Within the scope of the invention, each of the meter wheels of the remote reading unit be brought to an empty position or address position during the sequence switch the step-variable impedance is adjustable so that it is in a step in each Cycle short-circuits the bridge terminals of the step-variable impedance. if then the encrypting data transmitter when querying a short-circuited or open Has circuit, the corresponding counter wheel of the remote reading unit is in the Blank instead of zero or a digit. This results in a visible indication of a defect in the data transmitter circuit. The recording device the remote reading unit can also be equipped9 to generate an audible signal, when the counter wheels indicate the value zero or a digit, and one of them different audible signal when any one or more of the counter wheels are in the neutral position run so that an audible alarm signal is given in the event of a defect will.

In the context of the invention, the cable that the connection between the data transmitter on the measuring device and the remote reading unit, with only three wires be designed to, for example, four different digital digits in one of the Read the number registered on the meter.

This can be achieved by using two rows of the above mentioned data transmitter resistors are provided, one for each selected pair of contact elements mentioned above. One of the cores of the transmission cable is common, i.e. with the corresponding Terminals of the data transmitter resistors of both rows connected. A second wire in the cable is via separate, unidirectional devices with the contact elements connected, which is associated with a number of data transmitter resistors, during the third ladder of the Eabel via separate, unidirectional executions is connected to the contact elements that of the other set of data transmitter resistors assigned. Depending on a position, each contact element has a of the data transmitter resistors in the assigned series of resistors. Alzf this Way becomes a pair of parallel circuit branches across the common and the second wire and another pair of parallel circuit branches across the common Wire and the third wire of the cable placed on the bridge.

Each of these branches of the circuit contains one in turn the Contact elements and an associated, unidirectional element and the data transmitter resistor on which the respective contact element is located. the Unidirectional elements allow current to flow through only one these pairs of circuit branches, depending on the polarity as they are across these branches is laid. The sequence circuit part of the above-mentioned counter drive and sequence circuit sees a sequence of connections between the cable cores and the terminals of the bridge circuit in such a way that the bridge current flows through the four branches in a sequence which corresponds to the sequence in which the counting wheels of the Remote reader are to be driven.

Further features and advantages of the invention emerge from the following Description of an embodiment based on the drawing. They show: FIG. 1 a partial section, which is a building in section, a-arranged in the building and with a device according to the invention equipped measuring device and a reader shows carrying a reading unit according to the invention; Fig. 2 is a block diagram the remote reading device according to Figure 1; 3 shows an enlarged, partially sectioned partial side view of a measuring device according to FIG. 1; Fig. 4 shows a section essentially along the lines 4-4 of FIG. 3; Fig. 5 is a section substantially along lines 5-5 of Figure 4; 6 A and B Schemes of the data transmitter circuits on the measuring device; Fig. 7 A. and 3 diagrams of the circuits in the remote reading unit, the is adapted to be carried by a reader; Fig. 8 is a schematic Representation of part of the circuit contained in the remote reading unit and the connections for the recorder in the remote reader; Figure 9 is a top plan view of the remote reading unit of Figure 1; Fig. 10 is a section essentially along lines 10-10 of Figure 4; 11 is a perspective Representation of the in Fig.

10 shown, the circuit closing plate; Fig. 12 shows a section essentially along lines 12-12 in FIGS. 4 and 13 a function table for the function cycle counter according to FIG. 7A.

According to Figures 1 and 2, the remote reading device according to Invention of a portable unit for remotely displaying and recording a register reading of a measuring device 22.

The meter 22 can be of any conventional type for measuring of a flowable medium, for example liquids, so for example a Water consumption meter or the like. be.

As shown in Figure 3, the meter 22 generally includes a through the flowable medium-driven rotor 24, which rotates in a measuring device housing 26 is attached. The rotor 24 is driven by the flow of the flowable medium rotated by the housing 26 and is connected by a magnetic coupling 28 connected to a counter driving gear 30 in a register 32.

According to FIGS. 3 to 5, the register 32 contains one for several decimal places trained, provided with pinion transmission counter mechanism 34, the one Series of rotatable, axially aligned counter wheels mounted on a shaft 36, 37, 38 and 39, respectively, contain the four consecutive tens digits represent in a multi-digit decimal number, for example thousands, tens of thousands, Hundreds of thousands and millions.

It should be noted that the number registered by the counter mechanism is multi-digit Number can start with any desired tens digit, for example the Tens or the one.

To eat water or other liquids, the registry in units of liters, gallons, hectoliters, cubic meters or the like. take place. It If desired, additional counter wheels can also be used. That through the Measuring device flowing volume of fluid medium is determined by the counter mechanism 34 registered.

The counter mechanism 34 and its drive gear 30 can be any of be of conventional construction (cf.

U.S. Patent 3,534,619). The counter mechanism 34 and its drive gear 10 are housed in a housing 42 which is removably attached to the housing 26 is.

As shown in Figures 4 and 5, a data transmitter is located in the housing 42 and Versohlüsselungseinrichtung 44 (see also Figure 2) attached. This is how will be explained in detail later, operationally assigned to the counting mechanism 34, to form electrical signal conditions that the the volume display positions of the counter wheels 36 to 39.

The signals formed by the device 44 are through a three-wire Cable 46 is routed to a connecting coupling, which is designed in the form of a socket 48 is as shown in FIGS. 1 and 2. As shown in Figure 1, can the socket 48 may be attached to the outside of the wall of a building, in which the measuring device 22 is installed. The socket 48 can advantageously, as shown, be accessible from the outside of the building and designed to detachably receiving a probe or reading gun 50 carried by the reader will.

As shown in Figure 2, the reading gun 50 has a series of clamps, Contacts 52, 53 and 54, which are designed to be connected to corresponding terminals 55, 56 and 57 in the socket 48 to come into contact when the reading pistol 50 is inserted into the socket.

As shown in Figure 2, clamps 55-57 are advantageous in the form of printed terminal strips on a printed circuit board 61. Die Contacts 52 through 54 are in the form of edge contacts for touching the printed ones Terminal strips on the map 61.

Contacts 52 through 54 are via a flexible, multi-core cable 66 (Figures 1 and 2) with an interrogation and counter drive holding device 68 (Fig. 2) connected in unit 20.

In addition to circuit 68, unit 20 mainly includes one suitable power source 70, a counter mechanism 72 and a recorder 74. When the gun 50 is inserted into the socket 48, the circuit asks 68 from the signals generated by the device 44 to the counter mechanism 72 drive and operate the recording device 77 so that the reading at the register 32 by the counter mechanism 72 visibly remotely displayed and by the recording device 74 is recorded in the unit 20.

Circuit 68, current source 70, counter mechanism 72, and the recording devices 74 are housed in a housing 78 (FIG. 1). A shoulder strap 80 attached to the housing 78 allows the Reader, as shown in Fig. 1, the unit 20 can be conveniently carried.

As can be seen from Figures 3 and 5, the counter wheels 36 to 39 rotatably mounted on a fixed shaft 90.

The Gräger pinion meshing with the counter wheels are at 92 and rotatably mounted on a stationary shaft 94. The drive gear 30 is connected by an output element 97 to a counter wheel 56, and the counter wheels 37 and 38 are correspondingly in drive connection to the counter wheels 37 and 39 in the usual conventional manner via transmission pinions 92. The input of the Drive gear 30 is formed by a rotatable gear drive shaft 98, which is attached to a slave magnet of the magnetic coupling 28.

As shown in Figures 4, 5, 6A and 63, the bin direction includes 44 a pair of printed circuit boards 100 and 102 and two rows of resistors 104 and 106. Printed circuit boards 108 and 109 (see Fig. 6A) are respectively on the opposite side of the card 100 and the printed circuit boards 110 and 111 (see Fig. 6B) are on opposite sides of the card, respectively 102 formed.

As can best be seen from Figure 4, the counter wheels 36 and 39 arranged adjacent to the opposite end faces of the cards 100 and 102 and associated with the respective circuits 108 and 109. The counter wheels 3? and 38 are arranged between the cards 100 and 102 and each of the Circuits 109 and 110 assigned.

As shown in Figures 10 through 12, one is annular electrical conductive contact plate 114 coaxially on the opposite side of the circuit 108 of the counter wheel 36 attached. The plate 114 is integral with a pair radially and diametrically opposite extending plate spring contact arms 115 and 116 which contact the printed parts of the circuit 108 in a manner as will be explained in detail below.

As shown in Figure 12, are electrically conductive contact plates 114a, 114b and 114c each coaxially attached to the counter wheels 37, 38 and 39, in the same way as the contact plate 114 on the counter wheel 36.

The plates 114a, 114b and 114c are of the same construction as the plate 114. Accordingly, the same reference numerals with the index nan are also used for the contact arms of the plate 1'14al have the same reference numerals with the index "b" for the Contact arms of plate 114b and like reference numbers with the index "o" for the Contact arms of the plate 114c used.

As briefly described in detail, the contact arms engage the Board 114a on the printed parts of the circuit 109, the contact arms of the board 114b onto the printed parts of circuit 110 and the contact arms of board 114c on the printed parts of the circuit 111. The counter wheels 36-39 are themselves axially spaced from cards 100 and 102, one by friction caused braking on the rotor 24 and thereby a deterioration in the measurement accuracy to avoid.

As shown in Figure 6A, printed circuit board 108 includes one printed conductive ring 119 and a number of ten printed electrically conductive Strips 120, 121, 122, 123, 124, 125, 126, 127, 128 and 129, those shown at 152 in FIG Segments end to a construction surrounding the ring 119 in the manner of a commutator to build. The ring 119 is electrically conductive with another printed Strip shown at 130. The ring 119 and the strips 120 bis 129 are electrically isolated from one another on card 100. This type of a printed one Circuit is conventional, Circuit 110 is the same as that circuit 108.

Accordingly, the same numbers with the index "b" are used, to designate the same parts of circuit 110.

Each of the circuits 109 and 111 is a mirror image of the circuit 108. Therefore, the same reference numbers with the subscript "a" are used to denote the same Parts in circuit 109 and the same numbers with the index "c" for designation of the corresponding parts in circuit 111 are used.

Rings 119, 119a, 119b and 119c are axial with the counter wheels 36 to S9 aligned.

The contact arm 115 is shorter than the contact arm 116. The contact arms 115a, 115b and 115c or 116a, 116b and 116c have the same dimensions as the contact arms 115 and 116, respectively.

In this way, the arms 115, 115a, 115b and 115c contact, respectively rings 119, 119a, 119b and 119cm only. Contact arm 116 contacts the commutator segment one of the electrically conductive strips 120 to 129, depending on the respective position of the counter wheel 36. Correspondingly, the contact arm 116a is based on the commutator segment one of the electrically conductive strips 120a to 129a, depending on the position of the Counter wheel 37, while the contact arm 116b is the commutator segment of one of the contact strips 120b to 129b, depending on the position of the counter wheel 38 and the contact arm 116c, the commutator segment one the strip 120c to 129c touches depending on the position of the counter wheel 39.

According to the registration of the digits 0, 1, 2, 3, 4, 5 6, 7, 8 and 9 on the counter 36, the contact arm 116 touches the electrically conductive ones Strips 120, 121, 122, 123, 124, 125, 126, 127, 128 and 129 to create a bridging circle to close via the ring 119 and the respectively touched strip arrangement 120 to 129. The same arrangement and bridging circuit connection are made with the counter wheels 37 to 39 on their contact plates 114a, 114b and 114c and their associated circuits 109 to 111 applied.

As already known (US Pat. No. 3,534,619), the drive gear 30 has a locking device preventing intermediate positions, with which the counter wheel 36 a jerky rotary movement is moved from one position to the next. Through this the contact arm 116 pivots rapidly with the latching movement of each of the contact strips 120 to 129 to the next, adjacent electrically conductive strip3 As a result the contact arm 116 is prevented from coming to rest in a position where it could touch two of the electrical conductive strips at the same time.

As shown in Figure 6A, resistor row 104 comprises one row electrical resistors 141, 142, 143, 144, 145, 146, 147, 148, 149 and 150. The Resistor series 106 (see FIG. 63) correspondingly comprises a series electrical resistances 151, 152, 153, 154, 155, 156, 157, 158, 159 and 160 of the invention are the corresponding terminals of the electrical resistors 141 to 160 connected to conductor 58 of a transmission cable 46. The other clamps of the resistors 141 to 150 are each associated with the electrically conductive strips 121, 122, 123, 124, 125, t26, 127, 128, 129 and 120 and accordingly with the conductive Strips 121a, 122a, 123a, 124g, 125a, 126a, 127a, 128a, 129a and 120a connected. In a similar journey are the second terminals of the electrical resistors 151 bis 160 each with the conductive strips 121b, 122b, 123b, 124b, 125), 126b, 127b, 128b, 129b and 120b and also respectively with the conductive strips 121c, 1229, 123c, 124c, 1259, 126c, 127c, 128c, 129c, and 120c connected. these connections of the resistance terminals with the circuit cards is in practice by extending the resistance circuit through the associated printed circuit board and by soldering the resistor connection to the corresponding electrically conductive strips on the opposite one Pages of the printed circuit cards executed.

As shown in Figure 6A, the strip is electrically conductive 130 connected in series via a control diode 166 and an electrically conductive one Strip 164 connected to conductor 59. The conductive strip 130a is similarly connected in series across another control diode 162 and the electrically conductive strip 164 connected to the conductor or the wire 59. As shown, the conductor or wire 59 is electrically connected to the strip 164, and strip 164 is formed on circuit board 100, and electrically from isolated from circuits 108 and 109, with the exception of those by diodes 162 and 166 compounds formed.

As can be seen from Figure 6B, the conductive strip 130b is in Series connection via a control diode 172 and a conductive strip 170 with the conductor or the wire 60 connected. The conductive strip 130c is connected in series via another control diode 168 and the electrically conductive strip 170 the head bzs. the wire 60 connected. The conductor or wire 60 is electrical connected to strip 170, while strip 170 is on the circuit board 102 and electrically isolated from circuits 110 and 111, except of the connections formed by diodes 168 and 172.

Note that there is a bypass circuit connection over conductors 58 and 59 are created through each of contact plates 114 and 114a will. For example, the complete circuit connection for the contact plate 114 can be used between the conductors or veins 58 and 59 from the conductor or the vein 59 over the electrically conductive strip 164, across diode 166, across the conductive strip 150, over the ring 119, the contact arm 115 (whose contact ring 114 touches) over the contact arm 116 through one of the conductive strips 120 to 129 with that of the Contact arm 116 is in contact, and to the conductor or to the wire 58 via one of the Resistors in series 104 are formed.

Each of the contact plates 114b and 114c forms a circuit connection between conductors 58 and 60 in a manner similar to that described above for the Contact plates 114 and 114a has been described.

From the above description it can also be seen that the contact plates 114 and 114a close two parallel circuit branches, the bridges between represent the conductors or A-countries 58 and 59. The parallel circuit branch that the contact plate 119 contains, has in series connection: the diode 162, the Contact plate 114 and that resistor, in series 104, with the one the strip 120 to 129 that touches the contact arm will. Similarly, the parallel branch including contact plate 114a is in series connection: diode 162, contact plate 114a and that resistor in the Row 104 connected to that of strips 120a to 129a running from the contact arm is touched. Similarly, the contact plates 114b close and 114c two parallel circuit branches, the bridges over the conductors or Represent wires 58 and 60. The circuit branch containing the contact plate 114b contains in series connection: the diode 172, the contact plate 114b, and that Resistance in row 106, the one with the å-nigen strip of conductive strips 120b to 129b is connected, each of which is contacted by the contact arm. The the contact plate 114c containing circuit branch contains in series connection: the diode 168, the Contact plate 114c and that resistor in series 106 that corresponds to that of the conductive strips 120c to 129c is connected, each from the contact arm is touched 0 The diodes 162 and 166 are switched on so that they supply a direct current through one of the two parallel circuit branches with the plates 114 and 114a Eat 9 if direct current of the given polarity from the conductors BSWO cores 58 and 59 is placed. It should be noted that the anode of diode 162 and the cathode of diode 166 via the electrically conductive strip 164 are connected to wire 59.

In this way, for a given polarity, the current will flow through the circuit branch with the contact plate 114 but not through the circuit branch flow with the contact plate 114a.

When the polarity is reversed, the current flows through the branch of the circuit with the contact plate 114a, but not through the circuit branch with the contact plate 114.

Diodes 168 and 172 are connected and function in the same way in the same way as described above for diodes 162 and 166. To this In the same way, direct current flows with one polarity on the conductors or wires 58 and 60 through the circuit branch with the contact plate 114b, but not through the circuit branch with the contact plate 114c.

When the polarity is reversed, the current flows through the branch of the circuit with the contact plate 114c, but not through the circuit branch with the contact plate 114b.

Each of the resistors 141 to 150 has a selected electrical one Resistance value that differs considerably from the values of the other resistors in the Row 104 is different.

The resistors 151 to 160 are in each case corresponding same Resistance values like the resistors 141 E s 150 are chosen.

According to FIG. 2, the cable 66 contains three electrically insulated wires 180, 181 and 182, each with terminal contacts 52, 53 and 54 in the gun 50 are connected. When the gun 50 is inserted into the socket 48, create the ladder 180, 181 and 182 a continuation of the ladder resp.

Cores 58, 59 or 60. The signal voltages generated by device 44 are so by inserting the gun 50 into the socket 48 in the circuit 68 transferred.

As shown in Figure 7A, the wire 180 is with a movable contact element RY2-1 of relay RY2 connected. The wires 181 and 182 are each to fixed or Fixed contacts 184 and 185 of another relay RY1 placed.

Relays RY1 and RY2 form part of circuit 68.

The other parts of circuit 68 are shown in FIGS and are described below. The relays RY1 and RY2 are in a way effective, as will be explained later in detail, to successively the effective parts of the circuits 108 to 111 between the terminals 194 and 191 (Fig. 7A) of a 3-back circuit 192. The effective parts of each of these data transducers services form a branch of the bridge circuit 192.

The other two terminals of the bridge circuit 192 are each at 193 and 190 shown in Figure 7A. That branch of the bridge circuit 192 that is between the terminals 190 and 193 is placed, contains a resistor 196, the branch the bridge circuit 192 which is placed between the terminals 190 and 194 contains another resistor 197, which has the same electrical resistance value, like the resistor 196. That branch of the bridge circuit 192 that is between the Terminals 191 and 193 is connected, contains a blocking diode 198 in series, a resistor sensing contact arm 199 and a branch circuit in the sensing resistor series 200.

The diode 198 is connected to a terminal 191 at its cathode, and at its anode to the contact arm 199. The resistor row 200 has a row parallel branches 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211 and 212. The circuit branches 201 to 212 have corresponding terminals, which are consecutive be touched by the sensing contact arm 199. The other terminals of the circuit branches 201 to 212 are connected to a terminal 193 with a close common line.

The circuit branches 201 and 202 do not contain any resistors.

When these branches are turned into the bridge, each of these forms Branches effectively short circuit terminals 191 and 193 for one purpose as it is clarified below. The circuit branches 203 to 209 contain on the other hand precision resistors 214, 215, 216, 217, 218, 219, 220, 221, 222 and 223. When the contact arm disconnects the circuit branches 203 to 212 is touched, each of the resistors 214 to 223 is in sequence between the terminal 193 and the anode of the diode 198 switched.

The bridge circuit 192 is energized by the power source 70 which, as shown in FIG. 7A, contains a battery 230 whose negative Kleninie is placed on 1sse and its positive terminal in series via a spring-loaded reading pushbutton 232, a tension-reducing device Resistor 234, another resistor 236 and another resistor 238 to the positive input terminal of a conventional DC / DC converter 240 is laid. The negative input terminal of converter 240 is, as shown, laid on cup. The positive and negative output terminals of converter 240 are connected to terminals 190 and 191 of bridge circuit 192, respectively, and put the DC / battery voltage across the 3back shift 192.

The converter 240 forms an insulation between the current source 70 and circuit 68 to avoid leakage currents.

A noise suppressing capacitor 242 is across the negative Input and negative output of converter 240 connected in parallel. The condenser 242 acts to absorb abrupt changes in the direct current.

A 12V zener diode 244 connected between ground and the positive input terminal of converter 240 is applied, limits the voltage across positive and negative input terminals of the converter 240 to 12V.

The push button for the switch 232 is indicated at 245 and can advantageously in the top wall of the housing 78, as shown in Figure 9, be appropriate for easy access and convenient operation of the reader 232 is a pulse to the anode grid of a controlled silicon controlled current conducting Switch 248 placed to turn this switch 248 on. When this switch 248 is switched on, a holding circuit is normally established via two parallel-connected closed sets of contacts R13-1 and RY3-2 of a relay RY3 and via the in line with these contacts RY5-1 and RY3-2 lying heavy 248 closed. In closed State, this holding circuit bypasses switch 232 as shown.

By momentarily closing the switch 232, the voltage the power source is placed across terminals 190 and 191 of the bridge circuit, and this Voltage remains applied even when switch 232 is released until the relay RY3 is energized to connect the contacts RY3-1 and resp. or to open RYS-2.

As shown in Figure 7A, is a polarity sensing transistor 250 bridged across the output terminals 193 and 194 of the bridge circuit 192. The base of the transistor 250 is connected to the terminal 194 via a line, and the emitter of transistor 250 is connected to terminal 190 by a line. The collector of transistor 250 is connected through a resistor 252 to the positive 16 Terminal of the power source 70 connected. A pair of zen diodes 254 and 256 are connected in series in a circuit branch that connects terminals 193 and 194 bridged, in parallel connection to the emitter-base path of the transistor 250.

Diodes 254 and 256 limit the reverse bias on the transistor 250 to get a jump of tension (popping) in this route too avoid.

As can also be seen from FIG. 7A. are those of the relay contact element Contacts associated with RY2-1 are shown at 260 and 261 and each with terminals 191 and 194 connected. The fixed or assigned to the relay contact element RY2-2 stationary contacts are shown at 262 and 263 and with terminals 191, respectively and 194 connected in parallel to the circuit connection through relay contact RY2-1. The movable contact element RY2-2 is connected to the movable contact element through a wire RY1-1 connected.

With the above relay circuit connections, the operation of the Relay RYl determines which of the two printed circuit cards for interrogation is selected and the relay RY2 acts in conjunction with those described above Control diodes in circuits 108 and 111 to determine which circuit is the selected printed circuit card is to be queried and read 0 in particular if both relays RY1 and RY2 have dropped out, this is a bridge circuit branch from the terminal 194 via the movable relay contact element RY2-2, via the movable Relay contact element of relay RY1-1, via wires 181 and 59, via the effective Part of circuit 108, via resistor to series 104 the is connected to the effective circuit part of the contact plate 114, via the wires 58 and 180 and via the movable relay contact element RY2-1 to the negative input terminal 191 of the bridge circuit 192 is closed.

When the relay RY2 is energized, the movable contact element becomes P2-1 brought into contact with the stationary contact 161 and the movable contact element RI2-2 in contact with the stationary contact 262. As a result, the one Resistor of series 104, which is in the effective circuit through the contact arm 116a is switched on, placed in the bridge arm between terminals 191 and 194.

The above branch of the bridge kana from the terminal 194 over the stationary Contact 261 via the movable contact element RY2-1, via the wires 180 and 58 across the resistor of series 104 connected to contact arm 116a through the circuit 109 is connected, via the effective part of the circuit 109 via the diode 166, via the wires 59 and 181, via the movable contact elements RY1-1 and RY2-2 and can be followed via the stationary contact 262 to terminal 191.

When the relay EY1 is energized, it becomes movable Contact element RY1-1 in contact with the stationary ren contact 158 convicted. So when both relays RYl and RY2 are energized, the one will be Series 106 resistor connected to contact arm 116b as a bridge branch between terminals 191 and 194. This circuit can be from the terminal 194 via the stationary contact 261, via the movable contact element R2-1, via wires 180 and 58, across the resistor in series 104 of that with the contact arm 116b through circuit 110 is through the effective part of the circuit 110, as explained above, via the diode 168, via the wires 60 and 182, via the stationary contact 185, via the movable contact elements RY1-1 and R? 2-2 and can be followed via the stationary contact 262 to terminal 191.

If the relays RY1 and Rr2 are energized or de-energized, is the resistor of series 106 connected to contact arm 116c as effective bridge arm placed between terminals 191 and 194. This circuit can from the terminal 194 via the stationary contact element 263, via the movable Contact elements RY2-2 and RY1-1, via the stationary contact element 185, via the Wires 182 and 60, via the diode 174, via the effective part of the circuit 111, across that resistor of the series 106, which by the circuit 11 with the contact arm 116c is connected, via wires 58 and 180, via the movable one Contact element RY2-1 and tracked via the stationary contact element 260 to the terminal 109 will.

According to the invention, the values of the resistors are those in the bridge circuit 192 are arranged, selected so that a null condition or derivation condition the bridge does not enter. Instead, the value indicating position of the counter wheel is used in the measuring device register when querying by changing from an unadjusted Bridge condition detected on another unbalanced bridge condition. to for this purpose, each of the resistors 214 to 223 has a preselected value, the between the resistance values of two selected resistors in series 104 and two selected resistances in series 106 also fall.

When the counter wheel 36 has the digits 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0 registered, the resistances -141, 142, 143, 144, 145, 146, 147, 148, 149 and 150 in each case in the bridge branch between the terminals 191 and 194 in the event of a drop of relays RY1 and RY2. In a similar way, the resistors 141, 142, 143, 144, 145, 146, 147, 148, 149 and 150 each in the bridge branch between the Terminals 191 and 194 through the con.

clock plate 114a placed when the counter wheel 37 the digits 1,2, 3, 4, 5, 6, 7, 8, 9 and 0 are registered and the relays RY1 and RY2 each dropped and energized. Starting from the least resistance Resistance value is the series of resistors 141 to 150 and 214 to 223 as follows: Resistor 141, resistor 214, resistor 142, resistor 215, resistor 143, Resistor 216, resistor 144, resistor 217, resistor 145, resistor 218, Resistor 146, resistor 219, resistor 147, resistor 220, resistor 148, Resistor 221, Resistor 149, Resistor 222, Resistor 150, and Resistor 223. It is repeated that the resistance values of the resistors 151 to 160 are the same are like the resistance values of resistors 141 to 150.

When the counter wheel 38 reads the digits 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0 registered, the resistors 151, 152, 153, 154, 155, 156, 157, 158, 159 and 160 each in the bridge circuit as a bridge branch between the terminals 191 and 193 through contact plate 114b when both relays RY1 and RY1 are energized RY2 placed. in a similar way the resistors 151, 152, 153, 145, 155, 156, 157, 158, 159 and 160 each as a bridge arm between terminals 191 and 193 placed through the contact plate 114c when the counter wheel 39 has the digits 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0 registered and the relays RY1 and RY2 energized or have fallen off.

The respective values of the resistors 141 to 150, 151 to 160 and 214 to 223 are indicated in the drawing.

Since the scanning arm 199 is stepped in one direction to the precision resistors with successively higher resistance values in the Placing the bridge branch between terminals 191 and 193 is the position of the counter wheel in the measuring device register under queries by changing from an under-balanced Bridge state determined in an overbalanced bridge state. However, it is note that the circuit conditions can also be designed in such a way that the position of the counter wheel in the measuring device register by changing from an overbalanced one Bridge state in an underbalanced bridge state is determined Note in Figure 7A that transistor 250 is forward biased, and therefore is conductive as long as the resistance value of the precision resistor (of the series 200), which is placed between terminals 191 and 193, is smaller than the resistance value the resistance in the data transmitter in the bridge circuit between the terminals 191 and 194 is laid. In such a condition, the bridge is under balanced and the voltage on terminal 194 is less negative than the tension at terminal 191. But when the sensing arm 199 has advanced to a position is where he puts a resistor of series 200 in the bridge branch, its resistance value greater than that of the data transmitter resistance in the bridge arm between the terminals 194 and 191, the bridge is overbalanced and the voltage at the terminal 193 more negative than the voltage on terminal 191. As a result, the transistor 250 reversely biased and ceases to be conductive.

Since the determination of the position of the counter wheel in the measuring device register is not dependent on the balanced bridge state, the resistors can 141 to 160 simple, not precision resistors and relatively cheap to the Reduce manufacturing costs.

As can also be seen from FIGS. 7 & 7, the circuit 68 also holds a pulse generator or clock 260, which in operation pulses with essentially constant preselected repetition frequency (i.e. equal time intervals between the pulses) at each of two outputs. The two outputs of the clock 260 are connected to the input sides of two NAND gates 262 and 264, respectively. The clock 260 can be of any suitable conventional type. the the Input connections of each of Nand gates 262 and 264 are such that the gates work as an inventor.

The output of Nand gate 262 is with both inputs of another Nand gate 266 connected, and the output of this Nand gate 266 is through one Resistor 268 connected to the base of a transistor 270. The collector of the Transistor 270 is connected to the + 16V terminal of power source 70 through a resistor connected and also to the transistor base of a Darrington 272. The collector output The Darrington 272 is connected in series via a pacer coil 274 to the + 16V terminal of voltage source 70. Connected in parallel to coil 274 is a branch circuit with a diode 276 and a resistor 278 in series with the Diode 276. Gates 262 and 264 provide an insulating interface between the Pulse generator 260 and other parts of circuit 68. Those from generator 260 via The pulses applied to gate 262 are passed through transistor 270 and also through the Darrington circuit 274 for the pulser coil 274 is amplified. The sink 274 is operatively connected to the scanning arm 199. With everyone from watch 260 applied pulse, the coil 274 moves the sensing arm 199 around one branch of the circuit on to the next in the row 200, starting from the circuit branch 201 and proceeding until to circuit branch 212.

As will be explained in detail later, the transistor enables 250 with forward bias a Nand grid 259 counter drive pulses to drive of that counter wheel in the remote reading counter 72 that is to be queried Counter wheel of the measuring device register corresponds to feed.

When the transistor is reverse biased, the gate becomes 259 closed, so that the supply of further drive pulses to the counter wheel of the mechanism 72 is blocked.

As can also be seen from Figure 7A, the emitter is the transistor 250 connected to the base of a further transistor 280 via a resistor. The transistor 280 amplifies the signal voltage on the emitter of the transistor 250. The collector of transistor 280 is connected to the + 16V terminal via a resistor of the current source 70 and also to the base of a further transistor 282.

The transistor 282 amplifies the signal voltage on the collector of transistor 280. The collector of transistor 282 is across a resistor to a + 5V output terminal of a voltage regulator, which is shown in FIG. 7A at 284 is shown.

The voltage regulator 284 receives the current from the current source 70 and can be in any suitable form for generating a regulated, possibly stabilized 5V signal DC voltage be formed at its output.

As can also be seen from Figure 7A, is the collector of the transistor 282 connected to one input of gate 259 The other input of the gate 259 is connected to the output of gate 264.

With regard to the logic circuit part described here, there is one Logic "1" or a "high" positive DC voltage signal, and a logic "O" or a "deep" means essentially zero voltage. For the explanations given here positive logic is assumed for illustrative purposes only.

The gate signal received from transistor 250 through transistors 280 and 282 is applied to one input of gate 259 is "high" when the transistor 250 is forward biased and goes "low" when transistor 250 is reverse is biased. So the transistor signal, which is an input of the gate 259 is applied, "high" when the bridge circuit 192 is and will be underbalanced "low" when the bridge circuit 192 is overbalanced. Gate 259 will therefore enabled to receive the impulses coming from the watch to a Counter drive and a sequential circuit 300 (Figure 73) only to be allowed duroh when the Transistor 250 is forward biased, and consequently when the bridge circuit 192 is underbalanced. Circuit 300 is part of circuit 68 and like shown in Figure 7B - with a series of NAND-type logic gates 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, and 312. The exit of gate 259 is connected to the input sides of gates 302, 304, 307 and via an inverter 314 309 connected. If the gates 302, 304, 307 and 309 are open, they are through the gate 259 applied clock pulses to the respective pulse counter step generator coils 316, 317, 318 and 319 are laid out in a manner as will be explained later.

The coils 316, 317, 318 and 319 drive counter wheels 320, respectively, 321, 322, and 323 which constitute part of the counting mechanism 72 in the unit 20. The counter wheels 320, 321, 322 and 323 are driven independently of one another, and the place values of the counter wheels 320, 321, 322 and 323 correspond to the respectively Position values of the counter wheels 36, 37, 38 and 39 in the instrument register.

In contrast to the counter wheels equipped with ten digits In the register 32 of the measuring device, the counter wheels 320 to 323 are each with twelve Equipped positions. Ten positions are marked for reading the digits "1" to "9" and "0". The eleventh and twelfth positions on each of these counter wheels 320 up to 323 indicate default, missing position or address settings and can correspondingly with the letters "Z" and "N" or any other suitable Symbols that are not oVe or a number can be assigned.

The positions be on each of the counter wheels 320 to 323 as follows: Z, N, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0.

When the counters are reset, they register the letters "Z".

The counter wheels 320 to 323 can be mounted on a fixed shaft 326 (see 7B), which is attached in a suitable manner in a rotationally fixed manner in the housing 78 is. The positions of the counter wheels 320 to 323 corresponding to the register display are through a window 328 in the top wall of the housing 78, as shown in Figure 9, visible. The control circuit for opening and closing the gates in circuit 300 and also for the operational control of the relays RY1 and RY2 is shown in Figure 7A and includes a normally open switch 330, the through a suitable, movement-transmitting mechanism (in Fig. 7A schematically at 323 indicated) is brought into the closed position, after which the scanning arm 199 will be Inquiry of branch 212 has finished, and when arm 199 of branch 212 is moved on to start a new cycle.

One terminal of switch 330 is connected to IEsse and the other Terminal of switch 330 with both input terminals of Nand gate 334. Both Gate 334 inputs are also connected to the positive 5V output through a resistor of the voltage regulator or stabilizer 284 is connected. If so the switch 330 is open, the output of gate 334 is "low" or logic 80 ", and if the Switch 330 is closed to the inputs of gate 334 to voltage "0" lay, “high” or logic “1” is present at the output of gate 334. The outcome of the Gate 334 is connected to the input of another Nand gate 336. The other The input of the gate 336 is connected to one of the output terminals supplying the pulses Clock 260 connected. The output of gate 336 is monostable with the input pin (one-shot) nultivibrator 338 connected, and the output of the nultivibrator 338 is one via a pulse shaper 340 with a pulse counting input pin Decatical BoD counter 342 connected. As in detail further below explained, the operation of relays R1, RH2 and RY3 is controlled by counter 342, and the counter 342 determines the sequence in which the relays RY1 and RY2 are actuated in which the number of work cycles is counted through which the scanning arm 199 is moved gradually.

The propulsion of the counter wheels 320 to 323 of the remote reader is brought by the count on the counter 342 and the sequence in a mood in which the Counter wheels 36 to 39 of the measuring device are queried.

A switch 344 for resetting the counter 342 is associated with the switch 232 operated together. One of the terminals of switch 334 is connected to ground, and the other terminal of switch 344 through two inverters in series 346 and 348 with the reset pin of counter 3424 when switch 232 is optional is closed for a short time, the switch is also closed for a short time 344 and applying a zero potential to the reset pin of counter 342 to reset When the counter 342 is reset to zero, go on each of the three output pins A, 3, a of the counter 342 the signal conditions 11 low 11. The the logic signal states at the output pins A, 3 and C of the The signal board showing counter 342 is shown in FIG.

As shown in Figure 7B, output pins are A, B and C, respectively connected to the input sides of inverters 350, 351 and 352 in circuit 300. The output of inverter 350 is connected to the input of each of gates 302 and 306 and also connected to the input side of another inverter 353.

The output of inverter 353 is to an input pin of the gate 303 and also a pair of gate 309 input pins. The exit of inverter 351 is to an input pin of gate 306 to an input pin of gate 308 and also connected to an input pin of gate 310. Of the Inverter3 351 can also be accessed via another inverter 354 with an input pin of the gate 302 and connected to the input side of a further inverter 355. The output of inverter 355 is to an input pin of gate 303 and also connected to an input pin of another NAND gate 356.

The output of inverter 352 is to an input pin of the gate 302, to an input pin of the gate 303, to an input pin of the gate 310 and connected to the input side of a further inverter 358. The exit of inverter 358 is connected to an input pin of gate 306 to an input pin of gate 308 and connected to an input pin of gate 356. The exit of the gate 302 is connected to the base of a transistor 360 via a resistor. The emitter of transistor 360 is ground placed. The collector of transistor 360 is connected to the positive 16 V output via a resistor Current source 70 is applied and also to the base input terminal of a Darrington circuit 362. The collector output of Darrington circuit 362 is connected to a terminal of the Operational coil 316, which drives the counter wheel 320, is connected to the other terminal of the Operating coil 316 is connected to the positive 16 V output of power source 70.

The output of gate 303 is via an inverter 364 to the remainder Input pin of gate 304 placed. The output of gate 303 is also two Gate 305 input pins connected. The output of gate 304 is over a resistor is applied to the base of a transistor 366.

The collector of transistor 366 is to the base singing terminal connected to another Darrington circuit 368, and also through a resistor applied to the positive output of the current source 70. The collector output pin of the Darrington circuit 368 is connected to one terminal of the actuating coil 317, the the counter wheel 321 drives. The other terminal of the actuation coil 317 is connected to the positive 16 V output of the power source 70 connected.

The output of gate 305 is to the base input terminal via a resistor another Darrington circuit 370 placed. The collector output of the Darrington circuit 370 is connected to one terminal of the excitation winding of relay RY2. The other Terminal of the excitation winding of relay RY2 is connected to the positive 16 output of the power source 70 connected.

The output of gate 306 is pin to the remaining input of the gate 305, and also through an inverter 372 to the remainder Input pin of gate 307. The output of gate 307 is through a resistor applied to the base of a transistor 374. The emitter of transistor 374 is on Iasse laid. The collector of transistor 374 is connected to the base input terminal connected to another Darrington circuit 376 and also through a resistor with the positive 16 output of the current source 70. The collector output of the Darrington circuit 376 is connected to one terminal of the actuating coil 318, which is the counter wheel 322 drive The other terminal of the actuation coil 318 is positive 16 V output of the current source 70 connected.

The output of gate 308 is to the input side of an inverter 380 connected. The output of inverter 380 is to the remaining pin of the Gatters 309 placed, and also via a resistor to the base input terminal a Darrington circuit 382. The collector output of Darrington circuit 382 is connected to a terminal of the excitation winding of relay RY1. The other clamp the excitation winding of relay RY1 is connected to the positive 16 V output of the power source 70 connected.

The output of gate 309 is through an resistor to the base of a transistor 384 connected. The emitter of transistor 384 is grounded. The collector of transistor 384 is connected to the base input pin of another Darrington circuit 386 and also connected to the positive through a resistor 16 V output of current source 70. The collector output of the Darrington circuit 386 is connected to one terminal of the actuating coil 319, which is the counter wheel 323 drives. The other terminal of the actuation coil 319 is on the positive 16 V output of the current source 70 applied.

The output of gate 310 is to the input side of an inverter 388 and also to the input side of another inverter 390.

The output of inverter 388 is on the remaining input pin of the gate 311 placed. The output of gate 311 is about a Resistance connected to the base of a transistor 392. The emitter of the transistor 392 is great.

The collector of transistor 392 is connected to the base input pin one placed another Darrinton circuit 394 and also via a resistor to the positive 16 Output of power source 70.

The terminal of the actuating coil 319 connected to the output of the Darrington circuit 386 is placed, is also connected in series via a reset switch 400 and a blocking diode 402 is connected to the collector output of the Darington circuit 394. Similarly, the terminal of the actuating coil 318 connected to the output of the Darrington circuit 376 is placed, also in series via a reset switch 404 and a diode 406 connected to the collector output of the Darrington circuit 394.

The output of inverter 390 is to the remaining input pin of gate 312 and the output of gate 312 is through a resistor applied to the base of a transistor 408. The emitter of transistor 408 is on Ground. The collector of transistor 408 is connected to the base input Darington circuit 410 and also connected to the positive through a resistor 16 V output of the power source 70. The terminal of the actuating coil 316, which is connected to the Output of Darrington circuit 362 is connected to 2 is also connected in series via a reset switch 412 and a diode 418 to the collector output of the Darrington circuit 410 connected. Similarly, the terminal is the actuating coil 317, which is connected to the output of the Darrington circuit 308, also connected in series via a reset switch 416 and a blocking diode 414 to the collector output the Darrington circuit 410 is applied.

The output of gate 356 is another with both input pins Nand gate 420 connected. The gate 420 is connected as an inverter and with its output through a resistor to the base input pin of another Darrington circuit 422 laid. The collector output pin of Darrington circuit 422 is with a Terminal of the excitation winding of relay RY3 connected. The other terminal of the excitation winding of relay RX3 is connected to the positive 16 V output of power source 70.

As shown in Figure 7B, gate 305 is connected as a NOR gate. The signal logic that results at the output of the counter 342, and the components in circuit 500 are shown in a conventional manner in Figure 7B. To the registry of the measuring device 22 with the device described up to then read remotely, the reader inserts the pistol 50 into the socket 48 and presses the push button 245 to close the jointly operated switches 232 and 344. If one or more of the counter wheels 320 to 323 are not in the neutral position at this stage "Z" is reset, the push button 245 can be held in the depressed position to keep switch 344 closed until all counters are empty Register "Z".

When the switch 344 is closed, the counter 342 is reset, to give a "low" signal state on each of its output pins A, B and C, and as long as the switch 344 by holding the pushbutton 245 in the depressed position Position is held, the logic state remains on output pins A, 3, s of the counter is "low" regardless of the number of pulses - if they arrive - which are placed on the counter input of the counter.

As soon as the counter 342 is reset by closing the switch 344 energization of relay RY3 is also prevented. In particular, the gate forms 356 a logic "1" if the logic status on counter output pins B and C is through Resetting the counter 342 goes "low". That Logic "l" and the output of gate 356 are reversed through gate 420 to the Darrington circuit to keep switched off #. The result is at the output of the Darrington circuit 422 llhochtl, to the development of a for the excitation of the excitation winding of the Relay RY3 to prevent sufficient voltage drop.

It should be noted that applying a logic "1" to the input each Darrington circuit shown in Figures 7A and 7B has this Darrington circuit switches on and the application of a logic "O" to the input of the respective Darrington circuit turns off. If the respective Darrington circuit is switched on, is present its output fl low, and when the Darrington circuit is switched off, lies at their exit "high".

When relay RY3 has dropped out, contacts RY3-1 and RY3-2 are closed to close the hold circuit around switch 932. By closing of the switch 232, the pulse generator 260 is switched off by the power source 70 Voltage set and after releasing the push button 245 to open the switch 232, the pulse generator 260 remains energized through the holding circuit, which is formed by the contacts RY3-1 and RY3-2, If the logic status on counter output pins A, B and C by resetting counter 342 to "low" passes, gates 302, 304, 307 and 309 are disabled to allow the transmission of pulses the clock to the Darrington circuits 362, 3682, 376 and 386. The Darrington circuits 362, 368, 376 and 386 are therefore switched off and are consequently not in the Able to energize the stepper coils 316 to 319 for the counter wheels, even if gate 259 is open, pulses from the clock to gate 302, 304, 307 and 309 to be laid.

The Darrington circuits 370 and 382 are also turned off when the logic status on at least counter output pin C is "low". As a result the relays RY1 and RY2 drop out when the counter 342 is in the reset state.

If the logical status is through to the counter output pins B and C. If the counter 342 is reset to "JtieS", the status at the output of the Gate 310 "deep". It should be noted that the output of gate 310 is only "low" is when the logical status at both counter output pins Bunc a is "low" is.

The logic "0" at the output of gate 310 is generated by inverters 388 and 590 vice versa to open gates 311 and 512, respectively. As a result will be the pulses from generator 260 to the inputs of the Darrington circuits 394 and 410 put these Darrington circuits 394 and 410 periodically for the Pulsing the stepper actuation coils 316-319 turn on when their associated Reset switches 412, 416, 404 and 400 are closed. Each of the reset switches 412, 416, 404 and 400 will be closed if its associated counter wheel is not on the vacancy 22Zt is reset.

The coils 316-319 move when they are pulsed excited, step by step their assigned counter wheels according to the position ltzl? by means of a suitable indexing mechanism for the respective counter wheel. As soon as each of the Counter wheels 320 to 323 has reached its Z position, it opens the assigned one Reset switch via suitable motion transmission devices to reset the pulsation circuit, to interrupt the respectively assigned actuating coil (316 to 319).

As long as switch 344 is held closed, the counter will 342 is held in its reset state to allow pulses to pass through the Darrington circuits 394 and 410 for pulsing the coils 316 to 319 are fed until all of the counter wheels 320 to 323 are in their idle position 11Z11 are reset. After resetting the counter wheels 320 to 323 release button 245 to allow switches 232 and 344 open.

At the same time the coils 316-319 to reset the Counter wheels 320-323 are pulsed, stepper coil 274 is also pulsed pulsed by the pulses supplied by the pulse generator 260. As a result, will the sensing arm 199 is incremented and can be in any of its twelve positions Reach 200 in the row.

For example, assume that the sensing arm 199 on branch 207 arrives when the resetting of the counter wheels 320 to 323 is complete and the Switches 232 and 344 are opened. The coil 274 then continues through energized with pulses from generator 260 as generator 260 remains energized.

When the scanning arm moves from branch 212 to branch 201 is moved, it briefly closes switch 330.

By closing the switch 330, the output of the gate 334 goes on stage "high", and if a pulse at the input of the Gatters 336 arrives during the period in which switch 330 is closed and the scanning arm 199 moves from branch 212 to branch 201 in its step the status at the output of gate 336 goes from "high" to "low".

The multivibrator 338 is activated by changing the status at the output of gate 336 from "high" to "low" triggered a pulse by the pulse shaper 340 to the pulse count input pin of the counter 542.

Assume that switch 344 is open at this stage is to place the counter 342 in its pulse counting state. The counter 342 then counts the pulses supplied by the multivibrator 338. The output of the counter 342 then changes in the manner shown in the table in FIG. their logic status on counter output pin A thus goes "high" while the logic status on output pins 3 and a remains "deep". This logic status is shown at the output of the counter 342 for as long maintained until scan arm 199 has completed a full scan cycle, and the switch 330 closes again.

The remain under the above logic ratios at the counter output Gates 311 and 312 open while gates 302, 304, 307 and 309 remain closed, about the supply of pulses to the Darrington circuits 362, 368, 376 and 386 to disable and gates 305 and 308 hold the Darrington circuits 370 and 382 in the switched-off state. As a result, the relays RY 1 and remain RY2 dropped out, the Darrington circuits 362, 368, 376 and 386 remain outside Able to pulse coils 316-319 and the marrington circuits 394 and 410 remain in operation in order to assign pulses to coils 316 to 319, if their associated reset switches 412, 416, 404 and 400 have not been opened are.

By providing twelve circuit branches in series 200 and the need to apply twelve pulses to scan arm 199 through an entire Cycle, a sufficient number of pulses is also made available, to ensure that the counter wheels 320 to 323 are reset with certainty before the next pulse is counted in by counter 342.

After completing its first full cycle with counter 342 in the counting state, the scanning arm 199 briefly closes the switch 330 again when it is in one step moved from the circuit branch 212 to the circuit branch 201. as The result is the multivibrator 338 is operated again, and the themselves The resulting pulse is received by counter 342 to form a count "two". The logic status at output pins A and B will be "low" and accordingly "high" and the logic status at output pin C remains at logic "O".

By changing the logic status on output pin "B" to a logic "1" the status at the output of the gate 310 goes to "high". As a result, the Status at the output of gates 311 and 312 high, which causes the collector voltage on transistors 392 and 408 goes "low" to the Darrington circuits 394 and 410 switch off. The Darrington circuits 394 and 410 therefore turn off taken into operation and no reset pulses can be sent to the coils 316-319 give. as long as the logic status on at least one of the output pins B and C is "high" is.

By forming a logic 1 "on output pin B and one Logic "0" on each of output pins A and C are the outputs of gate 303 to 309 at such a stage that the Darrington circuits 368, 370, 376, 382 and 386 remain in their disabled state. The relays RYl and RY2 therefore remain dropped out and Darrington circuits 368, 376 and 386 remain ineffective for the supply of pulses to the coils 317-319. For this duty cycle of the Scanning arm 199 the counter wheels 321 to 323 are not through the clock impulses driven forward. However, gate 302 is enabled by the logic "ln" on the output pin B and the logic "O" on each of output pins d and a open. As a result, transmits the gate 302 the clock pulses on the transistor 360 while the bridge circuit 199 remains underbalanced to keep gate 259 open.

When the sensing arm 199 arrives at branch 201, the bridge hold is in place 192 is under-balanced when any one of resistors 141-150 is placed between terminals 191 and 194 because branch 201 has no resistance and forms a short circuit between terminals 191 and 193. Hence will also a clock pulse passed through gates 259 and 302 to transistor 360, and the scanning arm 199 is moved to the circuit branch 202 in one step.

At this stage, as mentioned above, the relays RY1 and RZ2 have dropped out. As a result, the circuit 108 which is operationally assigned to the counter wheel is queried, and the one of the resistors 141 to 150 that forms a circuit across the contact plate 114 forms, acts as a bridge arm between terminals 191 and 194.

The first clock pulse through gates 259 and 302 causes the state at the output of gate 302 goes "high" for the duration of the pulse. The collector voltage of the transistor 360 therefore briefly goes "high" to the Turn on Darrington circuit 362. As a result, the coil 316 comes with a Pulse occupied to move the counter wheel 320 from its "Z" position to its next empty position in which it registers the letter ItN.

When the sensing arm 199 arrives on branch 202, the bridge circuit remains 192 underbalanced because the resistance of branch 202 is less than that is any one of resistors 141-150. It therefore becomes a second clock pulse passed through gates 259 and 302 to cause Darrington circuit 362 to to apply a pulse to the coil 916 in turn. The counter wheel 320 becomes accordingly moves one step further to its next position, where it registers the number "1".

It is assumed that the counter wheel 36 is just registering the digit "1". As a result, resistor 141 acts as an effective bridge through contact plate 114 placed between terminals 191 and 194. Therefore the bridge holding 192 is overbalanced, when the scanning arm 199 is moved from branch 202 to branch 203 in one step, since the value of the Resistance 214 greater than that of the resistance 141 is.

The transistor 250 is therefore reverse biased to the gate 259 to close, and thereby any further transmission of impulses to the Shut off coil 316. The propulsion of the counter wheel 320 is accordingly in its Position which it registered the number n1 ", canceled.

It should be noted that when the sensing arm 199 is between the Branches in row 200 is located, the resistor between terminals 191 and 193 is undefined and the gate 259 is temporarily blocked. For the in The position of the contact plate 114 shown in FIG. 6A is the bridge circuit 192 first overbalanced when scanning arm 199 is incremented onto branch 208. There are therefore seven pulses applied to the Darrington circuit 362 to the Coil 316 to be assigned a pulse seven times. The counter wheel 320 therefore becomes seven times advanced, and therefore shows in accordance with the registry the counter wheel 36 the number "6n. When moving the scanning arm 199 The bridge circuit 192 Wber is balanced to the circuit branch 208 and the gate 259 consequently blocked in order to prevent further pulses from being transmitted to coil 316 lock.

The scanning arm 199 continues its incremental movement over the line 200 continues to its duty cycle even after the bridge circuit is overbalanced to end. When the scanning arm 199 takes its step from branch 212 to branch 201, to start a new cycle, switch 330 is briefly closed again, and the resulting pulse generated by the multivibrator 338 through the counter 342 counted, all in the manner described above. By counting that impulse the logic status at output pin A changes from "low" to "high", and the logic status on output pins B and 0 remains Ith high and low, respectively.

With a logic "1" on each of output pins A and B and one Logic "O" at the output pin a, the following conditions arise in the circuit 300 on: The gate 302 is blocked in order to prevent the transmission of any, to its Input clock pulses to block, and the Darrington circuit 362 is therefore switched off, so that this is now unable to pass the counter 320 through to the Coil 316 to drive applied pulses; the gates 307 and 309 remain blocked, to block the transmission of pulses for actuation of coils 318 and 319; the output of gate 308 remains high to the Darrington circuit 382 to keep switched off and thereby to keep the relay RY1 de-energized; the Gate 304 remains open to apply clock pulses to transistor 366; the Output of gate 305 goes "high" to turn on Darrington circuit 370, and thereby energize relay RY2. With relay EX2 energized and de-energized Relay RY1, the circuit 109 is placed under query, so that the resistor which makes a circuit connection through the contact plate 114b than more effective Bridge branch is placed between terminals 191 and 194. In the one shown in Figure 6A The position of the contact plate 114b is the resistor 150 between the terminals 191 and 194 laid.

When the scanning arm 199 begins its new duty cycle, the Bridge circuit 192 is returned to its underbalanced state to thereby to open gate 259.

The clock pulses transmitted through gate 259 are now over gate 304 passed to Darrington circuit 368 with each passed To switch the impulse on for a short time.

The coil 317 is therefore assigned a pulse to the counter wheel to move out of its Z position. When the sensing arm 199 moves onto branch 212 the bridge circuit 192 is over-balanced, and the gate 259 consequently closed to the transmission of further clock pulses for driving the counter wheel 317 shut off.

When transferring the scanning arm 199 from the circuit branch 212 to the circuit branch 201, the scanning arm 199 briefly closes the switch 330, and the switch accordingly The pulse generated in the multivibrator 338 is counted by the counter 342.

As a result, the logical status on the output pins changes A and B go from "high" to "low" and the logic state on output pin C changes from "low" to "high".

With these logic ratios, gates 302, 304 and 309 closed to the transmission of impulses for the propulsion of the counter wheels 320, 321 and 322 lock, but gate 307 is opened to clock pulses to the transistor 374 to direct. Likewise, the output s of gate 305 is held at the "high" state, to keep relay RY2 energized and the output of gate 308 goes low. The "low" state at the output of gate 308 is reversed to the Darrington circuit 382 to energize the relay RY1. For this work cycle are therefore both relays RI: and RY2 energized to the circuit 110 under query and the clock pulses from generator 260 are passed through gates 259 and 307 and causing the Darrington circuit 376 to pulse the coil 518 to be occupied as long as the bridge circuit 192 remains underbalanced. To this The counter wheel 322 is driven until the bridge circuit 192 is overbalanced to cause gate 259 to the transfer to block further impulses driving the counter wheel. That way it becomes Counter wheel 322 is moved into a position which corresponds to that of counter wheel 38.

Upon completing the duty cycle to poll circuit 110 and When stepping from the circuit branch 212 to the circuit branch 201, the scanning arm closes 199 again briefly the switch 330. The one consequently generated by the level vibrator 338 Pulse is counted in counter 342 to determine the logic status at output pin A. to put on logic "1". The logic status is now logic "in" on pin A, logic no "on pin B and logic" l "on pin 0. With these logic ratios, the Gates 302, 304 and 307 closed to the transmission of clock pulses for energizing of coils 316-318 to disable and gate 309 is open to clock pulses forward to transistor 384. The output of gate 308 remains "low", to keep relay RY1 energized, but the output of gate 305 goes to low to turn off the Darrington circuit 370. So for this duty cycle is the Sensing arm 199 energizes relay RZ1, and relay RY2 drops out to complete the circuit 111 to put under query, and only the counter wheel 323 is through the clock pulses moved, due to the fact that gate 309 is open and gates 302, 304 and 307 are blocked. The number of from gate 259 forwarded Clock pulses now depends on the position of the contact plate 114c, and consequently the position of the counter wheel 37.

Upon completion of its polling cycle for circuit 111, the leads Sensing arm 199 one step from circuit branch 212 to circuit branch 201, to briefly close switch 330 again. The counter 342 therefore counts another pulse from the level vibrator 328 to set the logic status at output pin A to logic "O" and at output pin B to logic "1". The logic status on output pin C remains "high".

With these logic ratios at d the output pins A, B and a all gates 302, 304, 307 and 309 are blocked to the transmission of the counter to block driving pulses to coils 316-319. The exit of the gate 308 goes high to cause Darrington circuit 3082 to operate the relay RY1 to drop. The output of gate 305 remains "low" to prevent that Darrington circuit 370 energizes relay RY2, and the output of the gate 356 goes to "deep". The logic "0" at the output of gate 356 is passed through the gate 420 reversed to form a logic "1" which turns Darrington circuit 422 on. That Relay RY3 is therefore energized to open contacts RY3-1 and RY3-2, whereby the holding circuit around the switch 232 is broken, and the battery voltage is removed from the circuit.

If there is a defect in any one or more of the data transmitter circuits 108 to 111 causes a short circuit between assigned cores in the transmission cable, the associated counter wheel in the unit 20 is not reset and Empty position nZn moved when the defective circuit is queried. This episode occurs because bridge circuit 192 is immediately trimmed to Eber To block gate 259 and thereby the supply of the counter-actuating pulses blocks when the scanning arm 199 steps onto branch 201 in the bridge circuit. The small resistance in the conductor forming branch 201 is sufficient to prevent the Bridge circuit to be adjusted.

In the event that there is a defect in any of the data transmitter circuits to be queried 108 to 111 an open circle between the associated cores of the transmission cable 46 forms, the associated counter wheel of the unit 20 is rotated over a full revolution nZll moves into its empty position because the open circle has an undefined resistance forms in the bridge branch, whose value is obviously greater, than any of the resistors in series 200. Under such a condition the bridge circuit 192 cannot be overbalanced.

This allows the pulses to drive the associated Counter wheel are supplied until the scanning arm finishes its duty cycle and the output of counter 342 changes its logic state when scanning arm 199 performs its step from branch 212 to branch 201 for the beginning of a new cycle. In this way, a visual indication is provided on the counter mechanism 72, if any one or more of the circuits 108-111 shorts or contains an open circle.

According to FIG. 8, the coil 316 adjusts when it receives a pulse, also a contact arm 500 in an indexing mechanism 502o The contact arm 500 and the counter wheel 320 are connected to one another in such a way that they rotate together. The switch-back mechanism 502, which is part of the remote reader represents, has twelve contacts 504, which in succession from the contact arm 50 through Applying pulses to the coil 316 are touched. Contacts 504 are respectively arranged at the twelve positions of the counter wheel, and when the counter wheel 320 in its positions "Z", "N", 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0 is located, the contact arm 50 touches the one shown in FIG. 8 with the corresponding one Contact of contacts 504 provided with marking.

The counter wheels 321 to 323 are correspondingly with Sohrittsohaltmeohatmen 502a, 502b and 502c have the same structure as the indexing mechanism 502 have.

Accordingly, like reference numerals with the subscript "a" are for the Designation of the parts of the indexing mechanism 502a, the same reference numbers the subscript "b" to denote the parts of the indexing mechanism 502b and the like Reference numbers with the subscript "c" for the designation of the parts of the sohrittshalteinrichtung 502c used.

The seat switch mechanisms 502, 502a, 502b and 502c are associated with the Recording device 74 is connected in a manner described in detail below.

As can also be seen from Figure 8, the reset switch includes 412 a rotating contact arm 506 and a series of twelve so-holder contacts 508. The arm 506 is suitable for simultaneous actuation on the arm 500 connected and can, for example, rotate with the counter wheel 320 this be attached0 The contacts 508 are each at twelve Positions of the counter wheel arranged, and when the counter wheel is in its position for Z, N, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0, the contact arm 506 contacts, respectively the correspondingly marked in Figure 8 contact 508. In switch 412 is the Counter wheel position "N" corresponding contact via a diode 418 to the output of the Darrington circuit 410 connected, while the eleven are in positions N, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0 of the counter wheel corresponding contacts connected in series are. If so, contact arm 506 is any of these eleven reset switch contacts touches a circuit for the supply of pulses to the step generator coil 316 closed to reset the counter wheel to its "z" position if the Darrington circuit 410 is turned on.

One of the reset switch contacts 508, that of the reset position or the empty position "Z" of the counter wheel corresponds to the other switch contacts electrically isolated so that when switch arm 506 is set to the position the circuit for applying pulses to coil 316 from the Darrington circuit 410 is interrupted, and so the counter wheel in its reset 0bzw. Vacancy is stopped.

As shown in Figure 8, the reset switches are 400, 404 and 416 the same as switch 412 and are also switched in the same way as this is described above for the reset switch 412. So every reset switch has a step-by-step shifting arm that is uniform with the one assigned to it Counter wheel is turned to keep the reset circuit closed as long as how the counter wheel is in a position other than its position, and the reset circuit is interrupted when the counter wheel is turned to its "Zn" position will.

With the exception of those contacts in switches 502, 502a, 502b and 502c, which correspond to the "Z" and "N" positions of the counter wheels 320 to 323, the contacts 504, 504a, 504b and 504c are parallel to the ten marked accordingly Data input terminals 510 of recorder 74 in that shown in FIG Way connected in parallel. The switch arms 500, 500a, 500b and 500c are corresponding connected to four separate input terminals 512 of the recorder 74.

The potentials applied to input terminals 510 and 512 are by the recorder 74 in any suitable manner to record the Registration of the counter wheels 320 to 323 to register. In addition to the recording The registration in the meter mechanism 72 is also used for identification data recorded by the recorder. These Identification data are fed by an identification data source residing in socket 48 is housed.

As shown in Figure 2, the identification data source can be a suitable holding mechanism 513 to 3, which uses a number of conventional, contains multiple digit decimal switch 514. Each of the decimal switches has a selective one actuatable selector 516 with ten positions for connecting various resistors into an effective circuit to correspond to a chosen tens digit. In In this embodiment, six decimal holders are shown, thereby making a six-digit number To form identification number. The switch mechanism 513 is in any one housed in the socket 48 in a suitable manner. Corresponding terminals of the switches 514 can each be attached to six separate, printed strips 517 on card 61 be. The other terminals of the switch 514 can be more complete with the circuit Be connected to ground.

Each of the switches 514 therefore forms a connection with a selected one Resistance across a common ground connection and its associated circuit strip 517. The six circuit strips 517 are each designed to be electrically removable with a corresponding myriad of contact elements 518 in the plug gun 50 to be connected when the gun 50 is inserted into the socket 48 through the reading will. The contact elements 518 are connected in parallel to separate Data input terminals 519 of the recording device 74 by separate conductors or Cores 520 which form part of the cable 66.

The recorder 74 is powered by the power source 70 and can be of any suitable conventional type, for example a motorized magnetic tape cassette device with suitable data processing Circuit parts for receiving the data input terminals in the form of electrical Signals placed information and to put the information on the tape or other data processing facilities. The recording device 74 is for this purpose equipped, to a recording command derived from the circuit 300 or to address an optionally applied Aufseihhnungskommnodo that of the actuation a manual input switch 526 (Figures 8 and 9).

The record command 0 from circuit 300 is triggered by the output logic of gate 356 is formed. As already described, the state at the output changes of gate 356 from "high" to "low" only after all data transmitter circuits have been queried have been, and the counter wheels 320 to 323 for reading the meter status are set. If the Switch 526 is open prevents one Logic "1" at the output of gate 356 prevents the recorder from recording the information placed on its data input terminals. But if the state at the exit of gate 356 goes "low" indicating completion of the remote reading recorder 74 speaks by recording the data on its data input terminals created information in a previously selected order. For example, can the identification data is recorded by the switching mechanism 513 first, followed by the information in order from switches 502, 502a, 502b and 502c of the counter wheels 320 to 323. The identification data can be recorded twice to ensure secure identification. Identification can be used to connect a consumer, a special measuring device or a measuring installation for billing purposes or for any other desired purpose. the Switches 514 are selectively adjustable to a chosen identification number to build.

In order to achieve the above-mentioned recording, the recording device 74, for example, suitable data processing settings 590 and B2 for the respective Receiving the signals applied to terminals 510 and 512 and converting the recorded signals in waveforms that contain on magnetic tape or other recording media, as indicated at 534, are recordable. The clamps 512 may be applied to a suitable counter wheel selection circuit 536, which is carried out by appropriate sequencing logic circuit 508 is controlled. Depending on a recording command from a suitable logic gate 540, the circuit 538 first sets the identification information for recording on the bus the recording device. The circuit then initiates 538 then the circuit 536 in order the switch arms 500, 500a, 500b and 500c which in turn causes circuit 530 to register in order on the counter wheels 320 to 323 for recording. The inputs of the logical Gates 540 are connected to input terminals 542 and 543, each with the output of gate 356 and one terminal of switch 526 are connected. the other terminal of switch 626 is connected to ground, so when this switch is optionally closed by manual operation from the reading, a logic "0" to the logic gate 540 is set. If such a logic "0" to gate 540, be through the gate 356 or fed through the switch 526, the logic gate outputs 540 a command signal to start the recording of the signals at terminals 510 and 512 placed data. In addition, the recording command fed to logic gate 540 signal to a transistor or other suitable counter 544 to turn on this switch 544, by turning on the switch 544 the power is applied to the recorder.

To make it easier to record the information chosen, each is of the counter wheels 320-323 independently and optionally by any suitable one Devices rotatable to a selected position. For example, a rotatable knurled dial 550 in drive connection with each of the counter wheels 320 to 323 (see Figure 9), the adjustment wheels 550 can be turned by hand accessible to turn the counter wheels 320 to 323 into selected positions, and thereby setting the counter wheels to read a selected number. By twisting the counter wheels 320 to 323 in the selected position are also the switch arm 500, 500a, 500b and 500c to the corresponding contacts in the switching mechanisms 502, 502a, 502b and 502c rotated, thereby turning the selected number in the form of electrical signals to place on the data input terminals of the recorder 74. Alternatively can also a suitable circuit for the use of pulses for optional propulsion the counter wheels. 320 to 323 in selected positions by selected hanging up of Pulses to the sinks 316-319 may be provided. Such a circuit would an optionally operable (not shown) switch for the drive coil each Counter wheel, i.e. for optional Closing a circuit for applying the pulses to each of the coils 316-319.

In the event that a meter is not set up for remote reading, the reader can make the registration on the measuring device that has not been appropriately removed read, and this deposit selectively set on the counter wheels 320 to 323 and then close switch 526 to give the recorder a command for the selected data to be applied to terminals 510. In the event that Ness devices that are not set up for remote reading also do not have an identification switching mechanism may have an auxiliary switching mechanism corresponding to the switching mechanism 315 with the plug gun 50 or an auxiliary data input of the recording device can be connected to supply the identification information for recording.

For convenience, a socket 48 can be provided with the identification switch mechanism 513 and a printed circuit board 61 mounted therein next to a measuring device installed that is not set up for remote reading. With such a There is no connection between the meter and the printed circuit board 61. To record the registration on the measuring device and the identification data, provides-the Read the counter wheels 320 to 323 for the value read on the measuring device, as above outlined, a, the plug gun 50 is inserted into the socket 48 and actuates the Switch 526 in closed manual position - the identification data and the meter registration data set manually on counter wheels 320-323 are thereby sequentially recorded by the recording device.

Note that when switch 526 is in the open Position is, the recorder 74 is not placed at its data input Records data as long as there is no logic "0" at gate 356. So so long the switch 526 is open, the recorder 74 is below the Control by circuit 300.

As described above, the two Beerstelluagen "Z" and "N" are in the switching mechanisms 502, 502a, 502b and 502c are not connected to the recorder tied together. Therefore, if any of the counter wheels 320-323 look at any of these Blank positions are located, which indicates an incorrect reading of information there cannot be any data at any of the input terminals 510. Under under such a condition, circuit 530 does not put any data on its output for the assigned counter wheel. The output of the circuit part 5SO can be connected to a suitable audible signaling circuit 560, the one There is an acoustic indicator when data to be recorded is at the output of the circuit 530 and a different audible indication when such data is on Output of circuit 530 is missing. There is a lack of data for each counter wheel at the output of circuit 530 when it is in one of its positions "Z" and nNn is located. This results in an audible signal as well as a visual one Indicates when any one or more of the counter wheels 320 to 323 are in a of spaces "Z" and "NW" (if a record is to be made).

For each of the counter wheels 320 to 323 this can be done by the horn or The audible signal emitted by the snare circuit 560 will be a continuous tone if the respective counter wheel in a position for registering zero or any Digit, and an intermittent tone when the counter wheel is in one of the Vacancies are located. The beep can also be recorded on the magnetic tape will.

From the above description it should be noted that the selective actuation of the switch 344 forms a reading command, and that within the scope of the invention created switching to the command signal to reset the counting mechanism 72 responds, then drives the counting mechanism to measure the measurement on the meter register, and finally an alphabetic drawing device 74 is operated to complete the registration in the counting mechanism 72 together with one from the switching mechanism 513 to record the identification formed.

It should also be noted that the counter mechanism 72 is a part a remote reading register for measuring devices and that the associated step holder mechanism 502, 502a, 502b and 502c is effective to reduce the number of supplied by a generator Counting pulses for driving the counter wheels 320 to 323. It should also be noted that the attitudes 108 to 111 exercise encryption functions, and that each these circuits encrypted electrical energy with various selected Voltage thresholds for different registration positions of the respectively assigned Forms counter wheel in the measuring device register. The through circuits 108 through 11 Developed encrypted signals are so in the form of encrypted voltage thresholds.

In addition, it should be noted that when using a meter with a remote reading device is equipped according to the invention, the visual display by the register 32 can also be omitted on the measuring device. It should also be noted that various features of the invention are applicable to conventional measuring devices, other than flow meters for gaseous or liquid media. Finally, it should be noted that the description Digits in the context of the description and claims, both zero and digits 1 to 9 includes.

All reproduced in the description, the claims and the drawing Features can be essential on their own or in any conceivable combination Be of importance to the invention.

-Patent claims-

Claims (37)

Claims 1. Remote reading device for measuring devices such as flow meters, Liquid and gas meters, energy meters, electric meters and the like which is attached to the measuring device devices for displaying the measured value and a connectable to the display devices of the measuring device via electrical lines Reading unit for multi-digit, digital reading or recording of the measured value are provided, characterized in that the measuring device (22) added, devices (32) reproducing the measured value for the delivery of encrypted signals are set up for their register position, while the reading unit (20) with Means (68, 72) for interrogating and converting these encrypted signals is equipped with a multi-digit, digital reading. 2. Apparatus according to claim 1, characterized in that the portable reading unit (20) devices (RY1, RY2) for dispensing a Reading command signal, a register (72) for registering a reading corresponding to the reading Decimal number, a recorder (74) and on the command signal appealing facilities (338 to 344) for preparing and operating the register (72) for taking a reading and recording in the form of a decimal number as well as Means (530 to 544) for preparing and operating the recording device (74) for recording a decimal number in register (72). 3. Apparatus according to claim 2, characterized in that devices (550) for selectively setting the register (72) and means (526) for selectively Activate the recording device (74) to record the data in the register (72) registered decimal number are provided. 4. Apparatus according to claim 2, characterized in that the on the read command signal responsive devices are electrical circuits, and the reading command signal is an electrical signal applied to these postures is placed. 5. Device according to one of claims 1 to 4, characterized in that that the binary direction responding to the reading command signal is designed for this purpose is to reset the register (72) in sequence, the register (72) to register the value on the measuring device (22), press and then the recorder (74) to record the number in the register actuate. 6. Device according to one of claims 1 to 5, characterized in that that the register 72) contained in the remote reading unit (20) acts as a counting mechanism with a number of independently driven counting wheels (320 to 323) is formed, which has a plurality of different digits in one nlehrstelligen Play a number. 7. Apparatus according to claim 6, characterized in that the counter wheels (320 to 323) are designed to do this in their reset position one of any Digit value to form free space, and that facilities to develop of a preselected signal are provided for such a case that any the counter wheels have not been moved out of a position. 8. The device according to claim 7, characterized in that the preselected Signal is an audible by, which may be is also given to the recorder for recording. 9. Apparatus according to claim 6, characterized by the combination means (550) for selectively setting a selected number on the counter wheels (320 to 323) of the register (72) with means (526) for selective development another electrical command signal to operate the recorder (74) to record the number selectively set on the register) 72). 10. Device according to one of claims 1 to 9, characterized in that that the register (72) is designed for visual reading of the number registered in it is. 11. The device according to claim 10, characterized in that the Register a plurality of independently drivable, each the digits for one Contains tens digit of the number bearing counter wheels (320 to 323), with the device responding to the command signal device parts for successive Driving these counter wheels independently of each other 'contains the in the register to visibly display the registered output value of the measuring device. 12. The device according to claim 7, characterized in that the the preselected signal is a first audible tone, the lack of of one recordable value, and a second, different from the first audible tone for each counter wheel, indicating that the counter wheel is in one, one recordable value has been moved out of the reset position is. 13. The device according to claim 1, characterized by the combination a register (32) arranged on the measuring device (22) with a remote reading unit (20), in the case of the devices for converting the data applied to the measuring device register (32) Value in first electrical signals, a remote reading head, terminals on the remote reading head, one connected to the emsetzeinrichtung and to the terminals on the remote reading head connectable transmission cable for applying these first signals to the terminals, Circuitry in the remote reading head for developing second electrical signals are provided for a selected identification of the information and facilities, those for the removable electrical connection of the circuit parts with the transmission cable are formed on the terminals. 14. The device according to claim 15, characterized in that the to be worn by a person remote reading unit (20) both for remote reading of the am Measuring device (22) arranged Register (32) as well as that of the measuring device (22) associated identification devices (513) is formed. 15. The device according to claim 13, characterized in that the the measuring device (22) associated devices (513) for identification at least a selectively operable element (516) for selecting different identifications having. 16. Device according to one of claims 1 to 15, characterized in that that at a distance from the measuring device (22) a socket (48) with terminal-like devices (55, 56, 57, 61, 517) is attached that also a transmission cable as a connection between these clamp-like Einriohtungen and the position of the measuring device (22) into signal converting device (32) for transmitting these signals to the Terminals is provided, and that further means (50) for electrical connection the terminal-like devices contained in the socket (48) with the circuit parts the remote reading device for transmitting the electrical signals to these circuit parts of the remote reader (20) are provided. 17. The device according to claim 16, characterized in that the Remote reading device (20) and the means (50, 66) for connecting them to the socket (48) are parts of a portable unit to be carried by the reader. 18. Device according to one of claims 1 to 17, gekennzeiohnet by combining at least one element attached to a measuring device, which is in different positions to display different measured quantities or other values are adjusted, with a bridge circuit with a pair of output terminals containing remote reading device, wherein means for applying a DC voltage potential on the bridge circuit, devices for generating an unmatched state the bridge circuit at its output terminals and to determine the position of the element attached to the measuring device by creating a transition from one polarity of the potential measured via the output terminals of the bridge retention to the other Polarity and under the control of the potential at the output terminals of the bridge circuit horizontal devices for displaying the position of the set by the measuring device Element corresponding value are provided. 19. The device according to claim 18, characterized in that the Display means a counter and means for driving this counter included, which are designed to continue the counter as long as the The polarity of the potential across the output terminals of the bridge circuit is one Polarity is where the devices driving the counter act on the junction respond to the opposite polarity to stop driving the counter. 20. The device according to claim 18, characterized in that the Bridge circuit with a first and a second bridge branch at the output terminals is under the control of the element adjusted by the measuring device Means for setting one of the respective position indicating electrical Resistance value the first bridge branch and facilities to vary incrementally of a resistance value form the second branch of the bridge and the resistance values of the first bridge branch and those of the second bridge branch in such a way against each other are tuned that the bridge when sampling the resistance values of the second Bridge leg from underbalanced state to overbalanced state jumps when the Resistance value of the first bridge branch exceeded will. 21. The device according to claim 20, characterized in that the in the first branch of the bridge and associated with the eating device resistance values between the resistance values in the second bridge branch are nested. 22. Device according to one of claims 18 to 21, characterized in that that a recording device as a display device or in addition to a display device is connected to the bridge circuit. 23.Vorrichtung according to claim 22, characterized in that the display device connected to the bridge circuit is a counter. 24. The device according to claim 22, characterized in that the Bridge circuit is formed with four branches, the first bridge branch and the second arm is connected in series between the output terminals are. 25. Device according to one of claims 18 to 24, characterized in that that a device for generating at the output terminals of the BrUckensohaltung one corresponding to the polarity of the potential across the output terminals Signal is applied and facilities are provided under the control this signal stand, and to transmit a series of pulses to a pulse counter are formed, the number of these pulses being a function of the of the Gauge associated element is displayed value, and that ultimately facilities are provided, which are under the control of the pulse counter and for display of the reproduced by the position of the element assigned to the measuring device Worth are trained. 26. Device according to one of claims 1 to 25, marked by combining a measuring device with at least one rotatable element, its rotary movement in different positions, different measured values corresponds, with a remote reading device that has a pulse generator for converting the the value reproducing position of the element assigned to the measuring device in a Pulse series and responsive to this pulse series to generate a value display Facility contains whose display the position of the measuring device associated element reproduces the corresponding value, the pulse generator and the display means form part of a portable unit used by the Readers should be carried with you. 27. Torriohtung according to claim 26, characterized in that the element associated with the measuring device indicating a register with a plurality of values Contains counter wheels whose registered positions for the different places Represent order in a multi-digit number while the remote reader does this is formed, successively from the position of each individual counter wheel convert the reproduced value into a corresponding series of electrical impulses, and the display means responsive to the pulses for dividing these pulse trains to the corresponding representation of values in digits of different orders of a multi-digit Number is formed. 28. Device according to one of claims 1 to 27, characterized in that that means for displaying defects in the electrical circuit are provided. 29. The device according to claim 28, characterized in that the Facilities for reading the value on the measuring device for an additional Reading or display are equipped in the event that an electrical fault at least one predetermined type occurs in the electrical circuit, wherein this error reading is unmistakable with the reading of any value. 30. The device according to claim 29, characterized in that the Discarding device is designed to prevent a short circuit as an electrical defect to display. 31. Device according to claim 29 or 30, characterized in that that the reading device is designed to have an open circuit as an electrical Display defect. 32. Device according to one of claims 29 to 31, characterized in that that the reading device is a register and in the register apart from the numeric displays also at least one unmistakable display for electrical defects in the Circuit is included. 33. Apparatus according to claim 32, characterized in that the Register counter wheels with a plurality of numeric displays and at least one thus contains unmistakable indication of an electrical defect in the circuit. 34. Device according to one of claims 1 to 33, marked by combining a measuring device register with at least four elements for Register values accordingly in four different digit orders of a multi-digit number with a remote reading device for the registration of this measuring device register, the one of the register elements of the measuring device assigned circuit for development of four electrical signals, each representing the registration position of each of the four elements. being a three-wire signal transmission cable using the circuit is connected to transmit the four signals and facilities at a distance from the measuring device register are connected to this cable, which on address the transmitted signals and indicate the registration of the four elements. 35. Apparatus according to claim 34, characterized in that the Signals in BOrm are formed by electrical voltages, which vary in height in a previously selected manner from different registration positions of each element a differentiate. 36. Apparatus according to claim 34, characterized in that the the first and the second wire of the transmission cable are connected to a line are assigned to the first and the second of the four register elements and to it is formed, due to the polarity of the signals either those from the first or those from the second register element to the first and second wire of the cable to lay, while the first and the third wire of the cable with one to the third and the fourth register element associated device is connected to the is designed, depending on the polarity of the signals, only those from the third or those from the fourth regulator element to the first and third wire of the cable to lay 0 37. Apparatus according to claim 36, characterized in that the device assigned to the first and second measuring device registers is formed is: a) first and second parallel branches of the circuit, which have the first and second wires are laid and b) one of the first register element of the Measuring device-driven switch devices that connect to the first branch of the circuit a different chosen resistance value for each registration position of the forms the first register element, and c) one of the second register element of the measuring device powered switch device that connects the second circuit branch with a different selected resistance value for each registration position of the second register element forms, while the third and fourth register element assigned and to the first and third wire of the cable connected device omitted: aa) third and fourth parallel circuit branches, over the first and third wire of the cable are switched, bb) one driven by the third register element of the measuring device Switch device, which the third circuit branch with a different selected Resistance forms for each registration position of the third register element and cc) one driven by the third register element of the measuring device Switch device, which the fourth branch of the circuit with a different selected Forms resistance value for each registration position of the fourth register element, where in the first, second, third and fourth circuit branches only in one Direction for electrical current permeable elements are arranged, while in the remote reading unit facilities for the choice of the respective wire pair and choice the direction of the electrical current carried through this pair of wires are to successively the first, second, third, and fourth branch of the circuit to be selected and to be queried with regard to its signal content