DE969229C - People search system - Google Patents

Description

ISSUED MAY 14, 1958

I 6885 VIIId 174 c

Sindelfingen (Württ.)

People search system

Known peoples search systems either work in such a way that a step-by-step switch is provided via a control line is actuated, which brings a display member into a position corresponding to the person being searched for, or so that a certain display element is switched on via one of several lines. For systems of the of the last type, several people can be searched for at the same time. However, all of these plants require special control lines. The use of communication lines that are already available for specific purposes for additional other purposes (so-called multiple use) is also known per se. So it is possible according to a known embodiment, via a. Telephone line control of auxiliary clocks with impulses every minute. A further development of this proposal provides over the Telephone line to transmit alarm signals in addition to the clock pulses. When passing a Alarm signal, the clock control function is interrupted and the clocks stop, Both versions are also for the special purposes of looking for people using existing clocks or Telephone lines unusable.

In the people search system according to the invention, the people search receivers are controlled via leading to the slave clocks or signaling devices

Lines by using a switch assigned to the person to be searched for at the transmission point is selected by several cam discs, which sends out pulses of a duration that the S Size of the angular rotation of a contact arm rotating at the same speed as the cam disk determined in the ad recipient.

In the case of clock systems, the line system is usually

current flows through only every minute for up to 2 seconds.

In the rest of the time, these lines can be used to search for people anyway will. But the occurrence of a clock pulse during the search process also affects it not, and vice versa, the clock and signal system is not disturbed by a search process.

The search for people is usually carried out by the switchboard or by a special point carried out. In both cases, the operator is usually very busy with other work taken. It is therefore not possible to take special care that about the plant during the occurrence of a clock pulse must not be operated or that the keys for two to searching people are not printed at the same time. According to a special feature of the invention A search pulse is only sent regardless of the time the key is pressed if no clock pulse is sent; if several buttons are pressed at the same time, the search pulses are sequentially displayed in the In the order of their length, regardless of whether there is a clock pulse in between.

The system works according to the pulse length method, in which the differentiation between the various searched persons is carried out by search pulses of various lengths. Determine through at the transmission point Push-button selectable, by a synchronous motor driven cam the pulse duration, and in the Receiving points is the extent of an angular rotation of one also of one by the pulse duration Synchronous motor driven contact arm determines which selects the appropriate display member. In the drawings is

Fig. Ι the s: schematic representation of the transmission point, Fig. 2 shows a for the purpose of erasing and operation with several pressed simultaneously Keys modified part of Fig. I,

3 shows the schematic representation of a clock line according to the three-wire self-monitoring system with the additional receiver for the search pulses; the arrangement is to be thought of as connected to point H with the point of the same name in Fig. 1, Fig. 4 shows a clock system based on the two-wire self-monitoring system,

Fig. 5 a and 5 b a clock system without self-monitoring, which with pulses of alternating polarity is working,

Fig. 6 shows a contact and switching arrangement on the receiver in a slave clock according to the system

Fig. 5 a,
Go Fig. 7 the relay arrangement in the search receiver, Fig. 8 a modification of Fig. 7 for the purposes

of the clock system with pulses of alternating polarity, Fig. 9 the selection and display part in the receiver.

The continuously rotating synchronous motor SMi (FIG. 1) drives the control cams StNi and StN 2 via a pair of wheels. The gear ratio ü 1 is chosen so that these cams rotate once in 58 seconds. Normally the cam StN 1 and thus the entire further drive is prevented from turning further by a pawl and a slip clutch. From the shaft carrying these cams, another camshaft W 2 is driven via a pair of gears ü 2, which drives a special cam disk Ni to N 4 and an additional control cam disk StN 3 for each of the persons sought. In the control cams Ni to N4 , the pulse duration corresponding to the person being sought is implemented by the distance of a notch α from the basic position. The end of a machine game is indicated by a cam rise δ. In the exemplary embodiment, each cam Ni to N 4 contains the identifier for two machine games, as is shown symbolically in FIG. Since the cam moves several times under the cam contacts K during 1 minute, care must be taken to ensure that the search circuit is only set up at the start of a new machine game when the search buttons X are pressed at any time. This is only possible when the contact stn%, 1 is closed by the control cam SÜV3. The circuit for the relay St can only be closed after pressing one of the key _{contacts Xi 1} 1 to X4, if the corresponding contact r 1.4 to / 4.4 is closed. The corresponding relays Ri to 224 are only energized at the end of a machine cycle by the cam part b , so that the contacts ri, 4 to -4, 4 are opened before each new machine cycle, whereby the holding circuit of the relay St , which may have been energized previously, is interrupted . When the contact si «3, ι has left the basic position on the control cam SiiV3 and has been opened as a result, pressing a button X as a result of the open contact si ι has no effect until the contact stn 3 is closed again. The search pulse circuit can only be set up when the relay ST is excited and when the contact st 1 closes. The contacts nujsü and nu / sü ^ gm are provided on the master clock or on the slave clock of a clock system which works according to the self-monitoring system and which is adjacent to the control or transmission point of the search system. In the self-monitoring system, correction pulses are sent out in the 59th minute, and during this time the contact nujsü ^ gm is open so that the magnet M, which enables the drive of the entire cam system, cannot be excited. However, this does not mean that search lamps that light up in the 58th minute, for example, will be extinguished in the 59th minute. Rather, as will be explained later, these lamps remain lit for any length of time that is desired. The contact nu / sü is closed when the normal minute impulse is sent to advance the clock system. The magnet M is therefore excited every minute with the exception of the 59th minute and releases the cam drive. When the minute pulse arrives, the slave clock NU 1 is set in a known manner according to FIG

energized through a circuit that goes like this: positive lead, mk, 12, nux, NUx, zi, 13, negative lead. This pulse has no effect on the receiver E 1 because of the blocking cell 22. The cam system will now run for 58 seconds. After about 3 seconds after the clock pulse has ended with certainty, the circuit for relay I is prepared via cam StN 2 (Fig. 1), which is closed when contact st 2 is closed when relay St is energized.

If, for example, the person 2 is searched for at any given moment by pressing the X 2 button, the search pulse circuit can only be set up when the cams N τ to N 4 and

StN 3 run through the basic position. The relay Si is then excited via the following circuit: Positive line, r2, 4, X2, 1, St, stn ^, 1, negative line. The relay St remains on the contact st τ until the contact r2, 4 is opened. If the cam basic position has just left contact K2 and St is energized, the following circuit is formed: Negative line, sti, contacts2, 3, switching blade of contact K2, contact 2,1, contact r2, 3, contact t2, 2, der is now closed because the relay T2 (Fig. 2) is energized, resistor W, point H, transition to Fig. 3, contact 12, receiver Ex, valve z2, contact 43, positive line. Since relay St was energized, relay I is also energized and has switched its contacts t2 and »3. This search pulse circuit is ineffective for the slave clocks NUx and NU2 because of the valve blocking cells zi. According to FIG. 7, the receiver E ι contains the relays 0 and P connected in parallel. However, only the relay O, which responds to a lower voltage, is excited.

The relay P, which responds to a higher voltage, can not respond because a voltage drop is generated by the resistor W (Fig. 1). The reduced voltage can only excite relay 0. In Fig. 9, the synchronous motor SM 2 is switched on via the contact 01 at the receiving point. At the same time, the brush B ι of a sliding contact connected to the synchronous motor is separated from the voltage by the contact 0 2, until the relay 0 is switched off again. This takes place when the cam contact K 2 has reached the recess α of the cam N 2 (FIG. 1). Then the grinding brush has also reached a certain contact segment, namely that for the relay U2 . The relay U 2 is energized and is held through the contact «2,1. As long as relay! 72 is energized, lamp L 2 also lights up. Already at the beginning of the pulse, ie when the relay O is energized, the relay Q is energized by a series of parallel-connected contact segments which are supplied with power by a second brush B 2 connected to the brush Bχ via the line c the emission of an acoustic signal triggers. After the search lamp L 2 lights up, the acoustic signal is repeated for longer periods of time, controlled by the bimetallic interrupter relays Bi 1 and Bi 2 , as long as one of the contacts ux, 2 to 4, 2 is closed.

When the cam contact K 2 falls into the cam recess α (Fig. 1), the circuit is interrupted to point H and the following circuit is formed via the contact 2, 2: Positive line, button X2, 2, relay 52, contact 2, 2, Middle lamella of cam contact K2, contact t 2, 3, contact sti, negative lead. The relay S 2 is energized and is maintained via its contact 2.1, which is connected to the negative line via the delete button TL 12. The relay S 2 is switched off when the button X 2, 2 is in the rest position or when the clear contact TL 12 is opened.

When the cam contact K 2 leaves the recess α , the pulse circuit to the receiver is closed again via the contact 2, 1, and the synchronous motor SM 2 (FIG. 9) continues to run into its basic position. The contact segment SM , which is directly connected to the synchronous motor and is swept over by the brush B 2 , is provided in order to guide the synchronous motor safely into its basic position, with even small inaccuracies such as slip of the motor etc. being corrected. After the brush B 2 has passed the segment Sm , the motor stops.

Contact S2, 2 also prepares a circuit for relay R2. When the cam contact K 2 reaches the cam increase b , the contact 2, 3 is closed and the relay R2 is excited via the central lamella, which is held via its contact r2, ι until the search button X 2 is brought into its basic position, ie until the Search is finished. By opening the contact r2, 3, the cam N 2 is ineffective for a further pulse. The relay St is switched off by the contact r2, 4.

If several keys X are pressed at the same time or if another key is pressed by pressing a key during the impulse, it is possible, according to the invention, that the impulses corresponding to the commands are sent one after the other without mutual interference with the required impulse duration. For example, since the control circuits to the receiver do not build up until the cam Si «3 passes through its basic position, it is possible that several switches will be operated up to this point in time. Since only one cam can be used effectively to generate pulses, the effect of another cam is stored for a short time until the first pulse has been properly processed by the receiver. If, for example, buttons Xi and X 3 are pressed at the same time, only the circuit from button Xi is effective because a contact 1, 1 (Fig. 2) prevents higher-order relays T and thus higher-order cams from becoming effective. If, in the manner already described, at the end of the machine game, the relay Rχ was energized by part b of the cam Nx , the relay Γι is de-energized again via the contact rx, 2. The contact ii, 1 closes, and the relay Γ3, whose circuit was prepared by the button X3, is energized, so that now, ^{starting from the basic position of the cam Λ Τ} 3, the impulse to the receiver via the contact £ 3, 2 can be sent. So it lights up first lamp L x and then lamp L 3 (Fig. 9).

The invention also provides that, if the button X 4 was pressed first for the longest pulse duration, while this pulse is being transmitted, other people, such as person no. 2, can be searched for at the same time. If the cam contact K 4 is already in a position with additional actuation of the button Xi , which has exceeded the position on the cam N4 corresponding to the part α of the cam Ni , the actuation of the button Xi is ineffective because the relay S1 is only activated by the Part a of the cam N1 can be excited. The relay Γι was excited by the key contact Xi, 3 and the relay T4 was switched off by the contact ti, 1 , and the impulse given by the cam N4 is ineffective by the contact 14, 2, which is now open. If the contact Ki has passed part a of the cam N1 , however, a circuit to the receiver relay O is formed via the contact i, 1, as a result of which the synchronous motor SM 2 tries to continue ao to its basic position.

If button X 2 is now pressed before contact K 2 has reached part α of cam Nz , this cam takes over the determination of the pulse length, because relay Ύ4 is ineffective via contact t2,1, which is now opened. As soon as the impulse from the cam N 2 has ended, ie at part δ, the relay i? 2 is energized by the contact 2, 3, and when the contact r2, 2 is opened, the relay Γ 2 is de-energized. By closing the contact tz, ι the control goes over to the cam N4 .

Several people can therefore be searched for at the same time using the corresponding lamps L1 to L 4. If one of the persons reported, their lamp is extinguished. The corresponding key X is returned to the basic position and the delete key TL is pressed briefly. As a result, the receiver receives a higher voltage via the contact TLn (FIG. 1), because the resistor W does not come into effect, so that the relay P in the receiver £ 1 is now also excited. The normally closed contacts φι and φ2 (Fig. 9) are opened, whereby the circuit for the synchronous motor and the holding circuit of the relays Vi to Ό4 is interrupted. All lamps are extinguished, but the lamps of the other wanted persons come back after a machine game at the latest, because immediately after releasing the TL key • the process just explained is repeated when several keys are pressed at the same time, since several X keys are still pressed.

A lamp L (Fig. 1) lights up as long as the relay I is not energized, ie as long as a clock pulse is sent. During this time, the Ti button should not be pressed. Although this would not have a disruptive effect on the system, it would also have no effect, since the search system is switched off from the clock system during the clock pulse. With the three-wire self-monitoring system, the pulses do not change polarity on any of the three lines. By blocking cells zi and zz (Fig. 3) unwanted pulses can be kept away from both the search character receivers Ei and from the slave clocks NU. The search and delete characters are differentiated by different voltages.

In a two-wire, self-monitoring clock system (Fig. 4), blocking cells cannot be used because the individual wires have different polarity at different times The pulses for the search receiver E 2 are given via contacts iz and £ 3 of the relay / controlled by the cam StN2 . The relay O of the receiver E2 in Fig. 8 'responds to every clock pulse runs every minute, but does not reach a contact segment intended for the actuation of a relay U , because a cam V connected to the switch contact finger has to move against the force of a spring of 3 seconds. Since the minute impulse is always shorter, the synchronous becomes after every minute impulse motor is returned to its basic position via this cam finger. However, when the cam has left the resilient lock, the synchronous motor can end its machine play without inhibition and without feedback. Shortly before the cam V leaves the resilient lock, the contact ν ι in the circuit of the relay P (Fig. 8) is briefly closed. In the case of a search pulse, however, the voltage is not sufficient to energize the relay P. However, an extinguishing pulse has a higher voltage, so that the relay P can be briefly energized so that the corresponding circuits in the receiver are interrupted by the contacts f 1 and fi 2. In this clock system, the delete key must be held down for at least one machine game, which can be achieved by known means.

The clock systems described so far are provided with neutral magnets. In the case of a system with polarized magnets and pulses that change polarity, the cams StNi and StN2 in FIG. 2 are replaced by the. Arrangement according to FIGS. 5 a, 5 b and 6. Between points D and E in FIG. 1, according to FIG. 5 b, the contact ναι of the high-resistance relay Va which responds with every minute pulse (FIG. 5 a) occurs. As a result, the magnet M (Fig. 1) releases the cam arrangement with a minute pulse. The slave clock NU (Fig. 6) used for the transmitter drives a cam, which alternately after each minute pulse prepares either relay K or relay L for excitation, which take the place of the relay /. In a known manner, both lines N are at the same, preferably plus potential, between the clock pulses. The line that had negative potential at the last minute pulse is switched to H via k χ or 11 , ie to the search system. The search pulse has a higher voltage than the clock pulse. The slave clock can still not be influenced because it is polarized and is on reception of the opposite polarity, but either the relay O or the relay P in the receiver E 3 is excited in the manner described by different voltages. These relays and relay V are neutral relays.

Instead of a clock line, the signal lines operated by a master clock can also be used to transmit the search pulses. Normally a signal circuit of FIG. Io of a relay Sig. Ri, from premature contacts, which are actuated by the screwed-in in the signal disc pins, and from the actual signal contact Sig. Through these contacts, the relay Sig. R ι is energized when a Pin is inserted into the signal disc at the desired time. Fig. II shows the use of the contacts of this relay Sig. R ι in the transmitter of the search system according to Fig. I. When signaling systems are used, the cams can rotate continuously regardless of the minute pulses of the clock line.

The cams StNi and StN 2 together with their control elements are therefore omitted. The structure of the cams -Vi to N 4 and the cam StN 3 remains unchanged. The sensing finger of the cam StN3 , however, controls a relay Sig. R 2, which can only be energized when the contact Sig. Nji is closed when a signal is given and at the same time the cam StN 3 passes through its basic position. The relay Sig. R 2 is held by s-: inen contact sig. / 2/1 until signaling has ended. During this time the contact is sig. r2l2 the relay Si is disconnected, and the search pulses from the cams Ni to N 4 are ineffective. The switching of the signal lines to the search pulse takes place according to Fig. 12 by two additional contacts st 2 and si 3 of the relay St. shown in Fig. 1.

The receiver E corresponds to that according to FIG. 7 and consists of two relays which control the receiving system (FIG. 9) in the same way as when searching via clock lines. By blocking cells in the $ z Signalkrei. " the signaling impulses can be kept away from the receiver for the search impulses.

Claims (13)

Patent claims: 1. Person search system with a display receiver controlled by a central transmitter with multiple utilization of a line for the simultaneous search of one or more people, characterized in that the display receiver has an electrical central clock via lines leading to the slave clocks or to the signaling devices! or signal system can be controlled by j assigned to one of the people to be searched for | Switch (Xi to X 4) at the transmission point a certain one of several cam disks (Ni to N 4) \ is selected, which sends out pulses of a duration that corresponds to the magnitude of the angular rotation of one with | same speed as the cam disk [rotating contact arm (Bi) determined in the display receiver. 2. Person search system according to claim 1, characterized by use in a clock system, via the lines of which the clock pulses are sent with the same or alternating polarity and at certain times (for example in the 59th minute) the slave clocks when they are up or down to be corrected to the exact time of the master clocks by means of special readjusting pulses. 3. People search system according to claim i, characterized through use in a clock system, the lines of which consist of two wires, are transmitted via the clock pulses in alternating directions. 4. people search system according to claim 1, characterized by using it in a signaling system, via whose lines the signals from a central Time control unit can be controlled. 5. Arrangement according to claims 1 to 4, characterized in that when a certain part (a) of the transmitting cam (N 1 to N 4) actuates the associated cam contact (A * 1 to K 4) , the rotation of the contact arm (B 1) terminated briefly in the receiver and the indicator element corresponding to this position (Li to L 4, Ui to U 4) is switched on, and that, after the specific cam part («) has left the cam contact, the contact arm is moved into its basic position without that the setting of the display members is changed. 6. Arrangement according to claims 1 to 5> characterized in that the cams determining the pulse duration (Λ ^τ ΐ to .V 4) in the time ■ aum - circulate several times between two clock pulses and are provided with several sections determining the pulse duration. 7. Arrangement according to claims 1 to 6, characterized in that a search pulse, regardless of the time of switch actuation, is only sent if no clock pulse is sent by a with the pulse transmission cams (Λ ^τ ΐ to Λ 4) synchronously rotating control pox ( StXz) interrupts the pulse circuit for the duration of the clock pulse. 8. Arrangement according to claims 1 to 7, characterized in that to differentiate Search impulses of various durations from different searched persons using corresponding X-cam disks be sent out. 9. Arrangement according to claims 1 to 8, characterized in that at the same time Pressing several switches the corresponding impulses one after the other in the order of their Length to be sent. 10. Arrangement according to claims 1 to 9, characterized in that when a switch has been operated and during the transmission of the associated pulse another switch with a lower value is actuated, the lower one first Pulse corresponding to the switch and then the pulse corresponding to the switch that was operated first Pulse is sent. 11. The arrangement according to claims 1 to 10, characterized in that upon completion of the pressing of a key and subsequent actuation of a special delete key [TL) all display members, preferably search lamps (Li to L 4), are deleted and that after releasing the delete key The lamps corresponding to the keys that are still pressed light up again automatically. 12. Arrangement according to claims 1 to 11, characterized in that when taking effect 809 511/3 Another cam part (b) at the end of the pulse meshing game, the circuit for controlling the receiver contact arm for influencing by further cam action becomes ineffective, in that a relay (Ri to R 4) is switched on, which is connected to a normally closed contact (ri, 3 to / 4, 3 ) interrupts the pulse circuit to the display receivers. 13. Arrangement according to claims 1 to 12, characterized in that when the cancel button is pressed, a relay (P) with opposite the Relays (O) of different voltage sensitivity activated by the search pulses takes effect. Considered publications:
German patent specifications No. 661 785, 556 317, 574073;
Swiss patent specification No. 134 796. For this purpose 2 sheets of drawings