DE1562082C - Telephone answering machine - Google Patents

Description

The invention relates to a telephone answering machine with call recording for connection to a magnetic tape with message texts in sections that extend over the length of the tape and receiving strip is provided, consisting of a non-rotatable connection between the supply and the take-up reel with its associated drive shafts, a tape drive, a take-up and playback head, which is arranged at a certain point on the tape path between the reels is, an amplifier, a detector, which is for the reception of an incoming on a subscriber line Rufstromes is determined and actuated the tape drive when receiving the Rufstrom, and one

ίο Switch for reversing the while walking by of the message text on the recording and playback head between this and the amplifier input and connections between the amplifier output and the subscriber line during the passage of a tape section lying between the message texts on the recording and Playback head.

In a known answering machine, this switch is not coupled to one of the coils.

ao pelt, but connected to the belt drive. This connection has the disadvantage that an exact synchronization between the individual tape sections and the respectively assigned switch positions is possible. Slippage cannot be avoided between the belt drive and the belt Size depends on many factors. This is associated with a failure of the answering machine because the the necessary amplifier settings cannot be assigned to the respective belt sections.

Answering machines have also become known, in which the control of the amplifier inputs and outputs were made with control signals stored on the tape. This answering machine can only be operated with tapes, the preparation of which is very complicated. Besides that the usable tape length available for recordings is reduced by the control signals.

Finally, answering machines are also known that work with two tapes, one of which is the one available as a reporting tape and the other as a recording tape. Such devices are very expensive. They can also only be used specifically as an answering machine and cannot be used as simple tape recorders, for example for dictation purposes, can be used.

The object of the present invention is therefore to provide a simple and inexpensive answering machine create where the greatest possible length of tape is available for recording conversations and which can also be used as a simple tape recorder.

This object is achieved in that the switch with one of the coils via a Clutch is connected and in performing a predetermined number of shifts in synchronism with the reel rotation and the movement of the unwinding from the supply reel and tape to be wound on the take-up reel.

With this answering machine, switching between the amplifier inputs and outputs is absolutely safe at the right moment regardless of the slip of the tape. It can also be used for this purpose provided switch can be installed in each tape recorder without much effort, so that this as Answering machine can be used. The switch is cheap and can be used quickly when worn be replaced.

Further details of the invention emerge from the following description and the drawings, in which preferred embodiments of the invention are illustrated, for example.

In the drawings shows

F i g. 1 is a view of a tape for a telephone answering machine according to the invention,

F i g. 2 shows an electrical circuit diagram of a telephone answering machine according to the invention with a recording device,

F i g. 3 is a schematic plan view of a mechanical clutch and a roller switch of FIG Arrangement of the F i g. 2,

F i g. 4 shows a schematic section through the shift drum of FIG. 3,

F i g. 5 a and 5 b the shift drum of FIG. 3 in two different angular positions,

F i g. 6 shows a modified embodiment of the shift drum according to FIG. 2 to 5,

F i g. 7 a modified part of the circuit diagram of FIG. 2,

F i g. 8 with a schematic representation of a second telephone answering machine according to the invention Recording device,

F i g. 9 a and 9 b are schematic explanations of the mode of operation of the switch in the device of FIG. 8th,

10a and 10b are schematic explanations of the mode of operation of a second switch in the device the F i g. 8th,

Fig. 11 is an electrical circuit diagram of the device of Fig. 8,

Fig. 12 is a partially sectioned side view a modified part of the device of FIG. 8th,

F i g. 13 a schematic representation of a modified embodiment of the coupling for the Device of Fig. 2,

14 shows a schematic representation of an electro-mechanical Transmitter as part of the coupling of FIGS. 13 and

15 shows a schematic representation of a modified one Embodiment of the electromechanical transmitter of FIG. 14th

The F i g. 1 of the drawings shows a magnetic tape 1 which is provided for a device according to the invention is. The audio tape 1 is provided with only one recording track extending over the full width, although other tapes also have two or more tracks can be used.

As the Fi g. 1 shows, the tape 1 is divided in the longitudinal direction and contains sections A1, A2 . . . AX for storing the message texts. Between these aforementioned sections there are sections M1, M2... MX for storing incoming messages. In general, all sections Al ... AX contain the same text, for example a message "Automatic telephone answering machine here, please leave your message when you hear the" beep "tone".

The tape of the F i g. 1 is compared with the one shown in FIG. 2 to 5 of the drawings prepared device shown and then used for phone answering.

To prepare the tape 1, the device of FIG. 2 to 5 operated like a conventional tape recorder in the "recording" position. In this case, the tape is moved past a playback and a recording head R, so that the message text on corresponding portions Al ... AX are recorded. A visual mark shows when the leading edge of each section A1 ... AX reaches the head and the operator has to start recording. Another mark appears when the trailing edge of a section A1 ... AX hits the head to indicate that the recording is to be completed. One working cycle, ie the time between the arrival of the front edge of the section A1 and the arrival of the front edge of the next section 2 at the recording head, is expediently one minute. Of this time, 20 seconds are used for the message text A1 , so that 40 seconds remain for the recording of the caller message Ml.

To use this tape for answering the phone, the device is connected to a telephone line and the tape is stored on a supply reel. This tape is connected to the take-up reel by a leader tape. An incoming ringing current actuates a relay or a semiconductor switch, which completes a direct current loop for the connection line and supplies electrical energy to the various electrical circuits and electromechanical parts of the device. Initially, the device is in the "playback" position, so that the message text of section A1 is fed to the telephone line while this tape section passes the recording and playback head. At the end of the section Al is transmitted via lead a "beep" tone. At this point in time, the device switches to the "recording" position so that the caller can record a message on the intermediate segment M1. At the end of the section Ml , the device is finally switched back to the playback position, the power supply to the electrical circuits and the electromechanical parts is removed and the direct current loop is removed from the connection line. The device is now ready to take a second call.

To the on the sections Ml ... To play back MX stored caller messages, the device is used like a normal tape recorder, which is brought into the playback position for this purpose.

As shown in FIG. 2, belongs to the telephone answering machine a supply reel 3 for the tape 1, a take-up reel 5 and a drive roller 7, which together with the pressure roller 9 conveys the tape from the reel 3 to the reel 5. The driving role 7 is driven by an electric motor, not shown.

Between the reel 3 and the reel 5, the tape runs past a playback and recording head R which, depending on the working position of the device, is connected to the relay 12 with the input 13 or output 15 of an amplifier 17 with the switch 11. The two connecting lines L1 and L 2 of the telephone are also connected to the input 13 or the output 15 of the amplifier 17 via an input transformer 19 and the changeover switches, depending on the working position of the device. The changeover switch 11 is actuated via the relay winding 21 of the relay 12. The current is supplied to the winding 21 via a switching drum 23 of a switch to be described below.

7 8

The shift drum 23 also regulates the current flow source 71 and the winding 21 also with the

through the winding 25 of a second relay 26 with contacts 73, 75, 77 and 79 of the shift drum 23

a first pair of contacts 27 and 29 and a two-bonded.

th contact pair 28 and 30. The functions of this As Fig. 3 of the drawings shows, is the

Relays are explained later. Finally, the supply reel 3 controls axially displaceably at one end

Shift drum 23 has an oscillator 31 which is attached to an axis 81 in a previously fixed position. Through a pin 83,

laid intervals of a duty cycle over which passes through the coil 3 and also in

Connecting line emits »beep« tones. a disk 85 engages which is fixed to the axis 81

The shift drum 23 is connected via the following, an axial displacement is made possible to be described clutch 33 with the supply _reel 3 i0, but a rotation connects. At their powered by. The arrangement here is such that the end remote from the coil 3 is the axis 81 above that the switching on of input 13 and output 15 is the same as in FIG. 2 schematically indicated coupling 33 of the amplifier 17 with the passage of the Ab- connected to the shift drum 23,
cuts Al .. .AX and Ml ... MX of the tape As F i g. 3 shows, belongs to this Kuppam head R is synchronized. A at the one ₁₅ lung 33, a screw 87, integral with the axle 81 end of the shift drum 23 mounted strip 35 is connected and engaged with a worm wheel 89, serving as a visual indicator for the particular work which is located on a transverse axis 91st The transverse position of the device, ie to identify the axis 91, carries a spur gear 93, which with the help of "recording" or "playback" division, an intermediate gear 97 can be disengaged with a

As can again be seen from Fig. 2, there are ₂ o gear 95 connected, which is located on the switching

the two connecting lines L 1 and L 2 are located over a roller 23.

Series connection of a capacitor 37 and an In in FIG. 3 working position shown engages

Winding 39 of relay 41 interconnects idler gear 97 into gears 93 and 95

manure. The contacts 43 of the relay 41 are with a one, so that a rotation of the axis 81 of one

Voltage source 45 and an input of an electrical 25 rotation of the shift drum 23 is accompanied. The intermediate

tric circuit 47 connected in series. With the Schenzahnrad 97 can of the gears 93

Circuit 47 will have its power supply removed from and 95 so that axis 81

Current source 45 to amplifier 17 and for purposes not to be explained in more detail below

The illustrated drive motor of the drive roller 7 can rotate independently of the shift drum 23,

controls. The electrical connections between the ₃₀ at the bearing of the gear 97 is a

Circuit 47 and the amplifier 17 or the motor switching arm 98 which, when the gear wheel 97

are in FIG. 2 is acted upon schematically with a dashed cam 102 on the shift drum 23.

Lines 49 and 51 indicated. When the cam 102 is acted upon by the

Parallel to the contacts 43 of the relay 41 are arm 98, the shift drum 23 rotates in a closed

the two contacts 28 and 30 of the relay 26, wel- 35 before a fixed angular position, which is still below

Ches, as mentioned above, is explained in more detail with the shift drum 23.

is controlled. The function of contacts 28 and 30 will provide appropriate gear ratios for the tooth explained later. wheels 87, 89, 93, 97 and 95 ensure that a

The connection line L1 is also one over the primary complete revolution of the shift drum 23

winding 53 of the transformer 19 corresponds to the fixed Kon 40 duty cycle.

clock 29 of the relay 26 connected, while the An F i g. 3 and 4 show that the shift drum

Closing line L 2 is formed directly with the associated 23 by a cylinder 99 which is rotatable

movable contact 27 is connected. Is mounted together on a shaft 101. On this cylinder

The contacts 27 of the 99 create a switched state, there is a copper-coated man-

and 29 the DC loop between the units 103, which is fixed with epoxy resin 105.

Final lines. This cylinder jacket 103 is made of fiberglass,

Finally, the connection line L 1 is also Mylar or some other flexible insulating material 107,

Via a capacitor 55 to the outlet of the Os- which have a thin copper coating 109

zillators 31 connected, which can in the aforementioned manner.

Connecting line supplied with a "beep" tone. 50 To manufacture the shift drum 23, the be

The secondary winding 57 of the input transformer used a printing process in which 19 is connected to ground. The still flat cylinder jacket 103, the other connection leads to the fixed contacts 59, copper is etched away at predetermined locations, and 65 of the changeover switch 11, which switches over so that a copper surface pattern 109 remains, from reproduction to recording. The two wider ones as shown in FIGS. 2 and 3. The corresponding fixed contacts 61 and 63 of the switch 11 etched jacket 103 is then placed around the cylinder 99 so standing with the playback and recording head R that the meeting longitudinal channels in connection. A first movable contact 67 th 111 extend parallel to the roller axis. Andes changeover switch works with the fixed contacts 59 closing the cylinder with its open and 61 together. The second movable contact 60th jacket is immersed in boiling water 69 of said switch for five minutes, the fixed contact. After cooling, the jacket retains 63 and 65 assigned. 103 its cylindrical shape and can then finally

To power the relay windings 21 and tig with the help of the epoxy resin 105 on the cylinder 99

25 and the oscillator 31, a power source 71 is to be attached in advance.

seen, one terminal of which directly connects to the 65. Finally, the surface of the returned

Windings 21 and 25 and the oscillator 31 remaining copper surfaces 104 initially with nickel and

is bound. Then plated with gold to complete the connections to create a hard contact surface.

the oscillator 31, the winding 25, the current surface are to be maintained.

The four contacts 73, 75, 77 mentioned above in connection with FIG. 2 belong to the shift drum 23 and 79. Each of these contacts 73 to 79 is a resilient metal strip perpendicular to the axis of the Cylinder 99 is aligned and one end acts upon the curved cylinder surface. At the The contacts 73 to 79 slide around the shift drum 23 with only very little frictional resistance over the cylinder surface. It should be noted in this connection that the thickness of the copper layer 109 in FIG. 4 is shown exaggerated. In practice this thickness is only a few Hundredths of a millimeter.

The F i g. 5 a and 5 b show the shift drum 23 in two different positions, during a complete Rotation around the axis. In the position of FIG. 5 a act on all contacts 73 to 79 an axially extending strip 113, which from the insulating material 107 of the cylinder jacket 103 is formed. There is therefore no electrically conductive connection between any of the contacts 73 to 79, so that no voltage from the current source 71 to the relay windings 21 and 25 and the oscillator 31 of FIG. 2 is delivered. the F i g. 5 b shows the shift drum 23 after it has moved in relation to the position of FIG. 5 a around a small one Winkelweg was rotated in the direction of arrow 115. This rotation is sufficient to move the copper surface 109 to move under the contacts 75 and 77 so that a current flow from the voltage source to the winding 25 of the relay 26 can be done.

The F i g. 2, 5 a and 5 b show that with the help of the strip 35 at one end of the shift drum The operator can read 23 and a pointer 117 on the stationary housing of the shift drum can determine which circuits the shift drum 23 is currently making with respect to the contacts 73 to 79. The The visual sign “5” provided on the strip 35 is located next to the non-conductive strip part 113 the shift drum, so that if, as F i g. 5 a shows that the mark "5" is next to the pointer 117, not electrical conductive connection between the contacts is established. Therefore, the windings 21 and 25 and the oscillator 31 is not energized.

The section 119 of the strip 35 following the character "5" is colored red as far as it extends over the Angular range extends in which the contacts 75 and 77 lie on the copper surface 109, the contacts 73 and 79 are still on the insulating material 107. When this section 119, as shown in FIG. 5 b shows, next to the pointer 117, the relay winding 25 receives voltage via the contacts 75 and 77.

Another rotation of the shift drum compared to that shown in FIG. 5 b position shown in the direction of Arrow 115 leads to the fact that the copper surface 109 also acts on the contact 79, so that the relay winding 21 is supplied with voltage.

The contact 73 acts periodically on the axially extending part 121 of the copper coating during the rotation of the roller 23 to the power supply for short intervals in predetermined To connect sections of the work cycle with the oscillator 31.

Before using the in Figs. 2 to 5, the magnetic tape 1 of FIG. 1 must first be prepared by using the device as a normal tape recorder in the "recording" position. For this purpose, the intermediate gear wheel 97 is decoupled from the gear wheels 93 and 95, so that the arm 98 acts on the cam 102 and brings the shift drum 23 into the aforementioned predetermined angular position. This position is available when the visual indicator “5” is next to the pointer 117. The tape 1 is then inserted so that the trailing edge of the leader tape is adjacent to the recording head R of the device. The rotation of the switching drum 23 takes place independently of the movement of the supply reel 3. A microphone (not shown) is connected to the input 13 of the amplifier 17, while the recording head R is connected to the amplifier output 15.

The motor is now switched on, so that the drive roller 7 conveys the tape from the supply reel 3 to the take-up reel 5 and thereby rotates the switching drum 23. Every time one of the sections A1 ... AX passes the head R , the operator records a message text. The correct point in time is when section 119 passes pointer 117. Finally, the tape 1 is rewound to the supply reel 3, so far that the trailing edge of the leader tape is next to the recording and playback head R again . In this position, the character "S" of the switching drum 23 is next to the pointer 117. The microphone is now disconnected again and the recording and playback head R is connected to the switch 11 as shown in FIG. 2 shows. Now the device according to FIG. 2 can be connected to the telephone line to receive incoming calls.

When a call arrives, the incoming ringing current ensures intermittent excitation of the relay winding 39 so that the contacts 43 close. Each time contact is made to the contacts 43, a current flows from the voltage source 45 to the circuit 47 and thus to the amplifier 17 and to the motor (not shown). The drive roller 7 and thus the tape 1, the supply reel 3 and the switching roller 23 then also move intermittently. After a few current pulses, the shift drum 23 has moved in relation to the position of FIGS. 2 and 5 a to the position of FIG. 5 b moved so that the two contacts 75 and 77 are connected to one another by the copper surface 109.

With an electrically conductive connection between the contacts 75 and 77, a current flows from the current source 71 to the relay winding 25, so that the contacts 27/29 and 28/30 close. The contact closure at the contacts 27/29 creates a direct current path between the connecting lines Ll and L 2, ie the call is accepted. A contact closure at the contacts 28/30 results in a current flow from the voltage source 45 to the motor and to the amplifier 17 regardless of the switching state of the contacts 43 of the relay 41.

The switched-on motor moves the section A 1 of the tape 1 past the head R so that the electrical signals recorded there are fed to the input 13 of the amplifier 17 via the contacts 69 and 63 of the switch 11. From the output 15 of the amplifier, the recorded signals are fed via the contacts 67 and 59 of the changeover switch 11 to the secondary winding 57 of the transformer 19, so that a signal is generated in the primary winding 53, which via the lines Ll and Ll the connection

End of the calling party reached. The calling subscriber therefore hears the message text recorded by the called subscriber in section A 1.

When the switching drum 23 has rotated according to the length of the section 119, ie so far that the rear edge of the section A 1 reaches the playback head R , the contact 73 briefly acts on the copper coating section 121. Now the oscillator 31 is fed from the power source 71, so that the connection line receives a "beep" tone, which indicates that the caller can now record his message.

Immediately after the "beep" tone, the contact 79 acts on the copper surface 109, so that the relay winding 21 is now excited from the current source 71. This results in a changeover of the changeover switch 11, so that its movable contact 69 acts on the contact 65 to connect the secondary winding 57 to the input 13 of the amplifier 17, while the movable contact 67 acts on the contact 61 to connect the recording head R to the amplifier output 15 to connect. The device is now in the "recording" position so that the incoming signals reach the head R via the input transformer 19 and the amplifier 17, which records the call detection on an intermediate section M1 of the tape 1. Shortly before the end of the section M 1 reaches the head .R, a second copper coating section 121 acts on the contact 73, so that another "beep" tone is transmitted over the connecting line to indicate that the recording time is almost over.

As soon as the shift drum 23 returns to the position of FIG. 2 and 5 a, in which the contacts 73 to 79 are all lifted off the copper coating 109, the windings 21 and 25 are de-energized. This leads to the opening of contacts Π129, which remove the direct current loop from the connecting leads. The contacts 28/30 are also opened to disconnect the voltage source 45 from the electrical circuit 47, so that the changeover switch 11 also returns to the switching state of FIG. 2 returns. The device is now ready to accept a second incoming call.

To play back the stored caller messages on the intermediate sections Ml ... MX of the tape, the device is operated as a normal tape recorder in the "playback" position. This includes backwashing the tape 1 onto the supply reel 3 up to a position in which the trailing edge of the leading tape is in turn next to the head R. Furthermore, the head R must also be connected to the input 13 of the amplifier 17 and a loudspeaker (not shown) must be connected to the amplifier output 15. The motor is now switched on to pull the tape 1 past the head R so that the recorded message can be heard over the loudspeaker.

It should be noted that the mechanical load on the mechanical system of the device by the Coupling of the shift drum 23 with the supply reel 3 is very small, since the contacts 73 to 79 only with one small frictional resistance on the shift drum. The insertion of the shift drum 23 has thus only a minimal influence on the operation of the device in terms of frequency response and uniformity Conveyor belt.

By coupling the shift drum 23 to the supply reel 3 or also the take-up reel 5, it is ensured that the tape 1 remains in synchronism with the position of the shift drum 23. The synchronism between the belt 1 and the electrical connections to the lines L 1 and L 2, to the amplifier 17 and to the head R is ensured even if between the belt and the drive roller? should a slip occur. The synchronization is also maintained when the tape is rewound to the supply reel 3 and the drive motor is switched from the drive roller 5 to the supply reel 3.

In the embodiment described above, the shift drum 23 is coupled to the supply reel 3, because the torque on this reel due to the tape tension is greater than the torque on the take-up reel 5. When the tape 1 is driven by the fact that the edge of the take-up reel 5 with acted upon a drive wheel, however, the switching drum 23 should be coupled to the take-up reel will.

The shift drum 23 of the embodiment described above can also be replaced by a number of silver slip rings which act on the contacts 73 to 79. In this case contains each slip ring has a section of insulating material on part of its curved surface, with which the contact can be interrupted.

The optical display device with the strip 35 and the pointer 117 can also be represented by a numerical or replace any other counter, indicator lamp or acoustic signal generator, whereby the electrical contacts required for these devices can also be provided on the shift drum.

The device according to FIG. 2 to 5 can also do this

be modified so that two Zener diodes are switched on in opposite directions between the two connecting lines L 1 and L 2, in order to prevent inductive current surges from reaching the amplifier.

The in F i g. Erasing head 1 illustrated E and the particular switching means for switching on and off of the erase head are in g F i. 2 not shown. Switching the erase head E on and off in the "recording" position can be done with a relay.

The relays 12 and 26 can also be replaced by additional conductive surfaces on the shift drum 23, the contacts 27 to 30 and 59 to 69 then being designed as resilient contact strips, which are assigned to the individual contact surfaces of the shift drum in the same way as with contacts 73 to 79. The F i g. 6 shows a shift drum with a first copper surface 123, which the contacts 125, 127 and 129 are assigned, and a second copper surface 131, to which the contacts 133, 135 and 137 are assigned are. This contact arrangement can replace the changeover switch 11. In a similar way you can also provide copper surfaces to replace the contacts 27 to 30 actuated by the winding 25.

For the relay 41 of the device described above, which is responsive to the ringing current, one can also be used Use arrangement as described below in connection with FIG. 7 will be described.

F i g. 7 shows a controlled semiconductor rectifier 141, the anode 143 of which is connected to the positive Terminal of a voltage source, not shown, is connected. The associated cathode 145 is with

13 14

a motor 147 for the belt conveyor roller 7 and with a motor pivoted with respect to FIG. 8 under the

connected to amplifier 17. The negative terminal influence of the spring 191 counterclockwise

the voltage source is also in the same direction as the motor.

147 and the amplifier 17 are connected. Next to the driving wheel 175 is on the from

The primary winding 159 of an input transformer 5 of the coil 171 remote side a disk 193 fixed 151 is connected with one terminal directly to the one with the axis 177. The disk 193 and line L 2 and with the other terminal via an axis 177 can be connected to the motor M capacitor 153 with the line L1. The drive by rectifying one end of a pin 195 in the secondary winding 155 of the transformer 151 , the output voltage occurring through aligned openings is passed through with a diode from coil 171 and drive wheel 175, rectified in 157. The rectified voltage sets a blind hole in the disk 193. Here appears at the grating 159 of the controlled semiconductor through on the other hand also the possibility of the rectifier 141. In parallel with the output of the secondary drive wheel 175 and the coil 171 regardless of därwicklung 155, a limit resistor 161, the disc 193 and the shaft is to rotate 177, by the current on the grid 159 of the rectifier 141 15 pulling the pin 195 out of the disc 193,
limited. Furthermore, there are two parallel connection between the bearings 179 and 181 , the axis ner diodes 163 and 165 , which are coupled to a transverse axis 197 to limit the voltage peaks 199 conducted to the grid via a worm 201 and a worm wheel. Take care of the axis. Finally, in parallel connection, 197 also rests in bearings 203 and 205.
A large capacitor 167 is provided, which acts as a low 20 The axis 197 forms a rotary switch which has a similar effect and the ringing current against the voice works like the switching drum 23 of FIG. 2 to 6 frequencies favored, so that the input signal on Normally the coil 171 makes one revolution responds to an incoming ringing current. per second, for the duration of a full

An advantage of the in FIGS. 2 to 5, 6 and 7 of the reporting and recording cycles as mentioned above

The device shown in the drawings is that the 25 is one minute. The transmission ratio between

Shift drum 23 and the associated clutch 33 see worm 201 and worm wheel 199

and the relays 12 and 26 in a tape recorder is 60: 1 so that the axis 197 is once per minute

can be inserted without whose mode of operation essentially revolves, d. H. one revolution for each complete

to affect. Because of this, it can do the opposite of the cycle.

advises not only as an answering machine, but also as 30 For the purpose of synchronization, there are recesses 207 and 209 in the Beu on the normal recording device for speech, 'music axis 197. Like. Be used. If the device is to serve as an answering machine in the first place between worm wheel 199 and bearing 203 vorLinie, one can see. These recesses 207 and 209 are the use of the less complex switching system, as it is assigned to both switches D and E. As shown below in Figures 8-11, for example. 35 will be explained in connection with FIG. 10

The device shown in Fig. 8 to 11 is used in, the switch D has the task of at the beginning of a

primarily as a telephone answering machine with operating cycle different electrical circuits

voice recorder. For this device to complete and this at the end of the cycle

can switch off message texts A 1 again on tape 1 of FIG. The switch E takes care of the

until AX are recorded. 40 switching between »playback« and »recording«.

According to FIG. 8 of the drawings, as can be seen from FIGS. 9a, 9b and 11, there is a

Tape 1 on a supply reel, not shown, switch D is a slide switch

of which the belt with a drive 173 to one with six contact groups, of which in the F i g. 9 a

Take-up reel 171 is rewound. When the band 1 and 9 b is shown only one. Any contact

runs from one reel to the other, it acts 45 group consists of three aligned

a recording and playback head R, which is in the fixed contacts 1, 2 and 3 and a sliding con-

F i g. 8 is not shown and also does not have a clock, which in its longitudinal direction between two positions

shown erase head Ei ?, the arrangement is slidable lungs, in which the middle fixed

is made so that the tape in advance the contact 2 in each case with one of the two outer

Heads R and ER applied tightly. 50 contacts 1 and 3 is connected. The six sliding

As the F i g. 8 shows the drive 173 engages when contacts are electrically isolated from one another, but

this device on the circumference of a friction wheel mechanically connected to each other and with a

winding reel 171 , while coupled with the device according to actuating arm 211 , the out of the housing

F i g. 1 to 7 with a drive belt conveying roller 213 superiors of the switch D in the direction of the axis 197

was seen. 55 protrudes.

The take-up reel 171 and the driving wheel Between the arm 211 of the switch D and a 175 are axially displaceable on one end of a fixed point 217 of the device there is a tension axis 177 attached to the bearings 179 and 181 spring 215. With the spring 215 the arm 211 is guided. The axle 171 and the driving wheel are pressed against the axle 197 , in such a way that a 175 are normally opposite the axle 177 60 outer end of the arm, the axle in the area of the rotatable, but an axial movement with the aid of recess 207 is applied and depending according to the Stelvon spring collars 183 prevented. The driving development of the shaft in this recess 207 jumps in wheel 175 is on the circumference with a rubber ring 184 or not. The length of the arm 211, which is provided by that which is acted upon by one end of the output shaft axis 197 , is sufficient to act upon the 185 of a motor M. The motor M 65 shaft can be pivoted freely in any direction about an axis 189 and is possible with one.

Spring 191 is applied so that the output shaft 185 From FIGS. 9a and 9b it can be seen that the

is pressed against the rubber ring 184 , that is, the recess 207 with respect to its dimensions in

15 16

Circumferential direction is limited, ie the arm 211 of a stationary opaque mask 227 can only recognize the recess for a small break when the axis 197 rotates,
Part of a complete revolution of the axis 197 Apply a letter provided in the color sample. The recess 207 has only a "5" indicates the start of a work cycle. If the radial depth within the shaft 197 is small, so that the letter "5" is visible through the opening 225 , the arm 211 is between the two positions in the, the recesses 207 and 209 are so that it lies in the recess 207 and in which he acts on the switch D in the "off" position and the outer circumference of the axis 197, only switch E executes limited movement in the longitudinal direction at the beginning of the "playback" stones. is located so that the device is ready to answer a call that hits the recess 207 ίο when the arm 211 does not. After you hit a cylindrical part of the axis 197 by removing the pin 195 and the coil 171 and only slightly protrudes from the switch housing and the drive wheel 175 from the axis 177 housing 213 (FIG. 9 b), each of the connects has coupled, the spool 171 is rotated into a position, sliding contacts a central fixed contact with the rear end of the tape 1 belonging to the associated outer fixed contact, the reference 15 next to the playback and recording of Fig. 9b left of which is located. The acceptance head is located. After reinserting the arm 211 on the cylindrical outer pin and switching on the motor M , the first message text for the state of the various electrical circuits, A 1, is transmitted via the connecting line at the front of the axis 197, corresponding to the switched-on run of the tape on the head.
which are then connected to their power sources. 20 When the device is in operation, the wheel 223 runs in

When the arm 211 hits the recess 207 in the direction of the one shown in FIG. 8 drawn arrow around,

hits and therefore further out of the switch housing so that behind the letter in the opening 225

213 protrudes, each sliding contact acts on an adjacent section 229 becomes visible. This

only the middle fixed contact (Fig. 9 a). This section 229 shows that the switch E

Switching state corresponds to the switched-off state of the 25 is in a position that the playback of a

Device. Message text. Here the lower

It should be noted that the outer fixed contact extends the width of the marking of this section.

of each contact group who know how much time is left until the end of the

F i g. 9 a and 9 b is on the right, is not used. Message text is reached.

The 30 shown in FIGS. 10a and 10b and 11 finally appears behind the section 229 in switch E is a slide switch which, similar to the opening 225, has a section 231 which is designed as the switch D and also took a six position corresponds, that is, the time has identifiable contact groups, of which in Fig. 10a makes, in which the sections of the tape Ml ... MX and 10b only one contact group is shown. walk past the head:

Each contact group of switch E consists of three 35 If a tape on which calls are recorded

fixed contacts and a sliding contact. Which have been played back by an operator

Sliding contacts of switch E are on one arm, can be done with the help of a color pattern on the wheel

219 , which can be clearly recognized with the help of a tension spring against 223 when a message text

the axis 197 is pressed. section Al ... AX on the recording and replay

From Fig. 10a and 10b it can be seen that the 40 dispensing head passes. The device is provided with a recess 209 , later assigned to switch E , almost in connection with FIG. This ensures that the device gives the ability to increase the tape speed to verin the playback position when the arm is applied when the message text sections A 1 ... AX 219 at the recess 209 about a third of the 45 are played.

Cycle time remains. 11 of the drawings shows the electrical depth of the recess 209 in the axis 197 so switching connections of the device according to FIG. Shows 8 to 10. great that upon engagement of the arm 219 in the training FIG. 11 is a manually operated recess 209 of each slide contact of the switch E slide switch C, which is similarly formed as a fixed center contact with respect to the 50 Switches D and E. This switch also contains six outer fixed contact groups on the right in FIGS. 10a and 10b, each of which connects three fixed contacts and contact. If, on the other hand, the arm 219 contains a sliding contact. The fixed contacts of the non-machined outer surface of the axis 197 of the switch C are abutted in Fig. 11 with el to cl8, each sliding contact connects the fixed draws.

middle contact with the left outer fixed 55 The switch C has the task of the device from

Contact. Normal operation, d. H. from operation as normal sound

As the F i g. 8 shows is at the end of the axis 197, handheld device, or from the inclusion of message texts

opposite switches D and E , an opti- on sections Al ... AX of the tape

cal display device 221 is provided, which can be switched from an "answering machine" mode,

future on the angular position of the axis 197 and there- 60 In Fi g. 11 are the sliding contacts of the switching

with about the working position of the device. This ters C in the Normak position.

The display device corresponds to the previously mentioned switch D , as already mentioned above, is used

Display device in the embodiment according to the invention to "switch on" and "switch off" the device. the

the F i g. 2 to 7. F i g. 11 shows this switch with its sliding

A wheel 223, 65 clocks in the "off" position belongs to the display device 221. The permanent contacts of the

which is fixed on the axis 197 and on its switch D are in the drawing with dl to dl8 loaded

carries a color sample to a certain extent. A section that - draws,

This color pattern is through an opening 225 inside. The switch E , as mentioned above, has the

17 18

Task, the device between "recording" and "how" is output 251 of amplifier 249 via the

dergabe «to switch. The fixed contacts of switches A, E and C and the line 273 to the

Switches E are denoted by el to el8. Center tap of a potentiometer 275 connected.

The switch E is assigned a slide switch A The potentiometer 275 has the task of

net, which contains four contact groups whose fixed 5 speech sensitivity of the device during transmission

Contacts with al to α 12 are designated. The sound of a message text in the telephone line is less

ter A is conditioned manually and has the task of doing that when receiving an incoming

electrical connections to switch E to reverse communication.

sate. Thus, if the switches A and C are in the For recording message texts on the shelves of FIG. 11, the OK cut A 1 ... AX of the tape can be in the Ge switch in the "recording" position. If the advises a microphone to be plugged in. This purpose is served reversed switch ^, ie of sliding contact, the Steckbuchse72 which a contact via the contacts relative to the position of FIG. 11 shifted the amplifier 249 to the right switch Λ to the entrance 245 comes, the switch E leads to the "re.
gift «position. 15 An incoming message can be preceded by a

With the switch A is a slide switch B is overall speaker S are intercepted, which deals with a

couples, which with the fixed contacts b 1 to monitoring switch 277 in the circuit

b 12 is provided. can switch.

In addition to the switches mentioned above, FIG. 1 shows the device of FIGS. 8, 20-fold tape recorder can be used by pulling out a main power source 241 and an additional pin 195 so that the coil 171 power source 243 for powering the motor M rotates without rotating the axis 197. Normally only the power source is 241 shuttered cause. The switch C is in the Schaltsteltet, but the power source 243 can be brought into series development of FIG. 11 and the switches B and A switch when the actuating arm 244 of 25 is used to switch between playback and switch F is switched. By this Schalterbetäti- recording, the switch E determines which gradient results in a gain of the current flow settings of A and B are thus the two modes zugezum motor M and below in still loading allocates,
writing to an increase in speed. To use the device as an answering machine

Via switch E , depending on the operating position 30, the message texts for the sequence "playback" or "recording" must first be recorded as a recut A 1 ... AX of the tape and recording head R with an input 245 . For this purpose, the device is set in the manner described above or an output 247 of an amplifier 249 in such a way that the rear ties. At the amplifier 249 a second edge from the lead of the tape 1 is provided next to the cradle 251, which output voltages 35 comes to the output and recording head R and into a telephone line and a loudspeaker S one of the section S on the circumference of the wheel 223 through the feeds. The operating current for the amplifier 249 opening 225 is visible. The switches ^, B and C come from a power source 253. The power supplies are in the positions shown in FIG. 11, the supply part for the amplifier is shown in FIG. 11 with the reference number 249 'in the socket 72 . 40 is inserted, which is then between the ground connection

One terminal of an erase head ER is connected to and the input 245 of the amplifier 249, which

negative terminal of the voltage source 253 via the contacts E 1 and E2 and the contacts Al

a resistor 254 connected. The other terminal and A 2 is connected. From output 247 of the

can, with the positive amplifier 249 at ground potential, the output signal passes through the

Terminal of the voltage source 253 via the switch C, 45 contacts α 4 and a 5 and the contacts 4 and e5

E and A are connected. to the recording head R. The supply current for the

In order to connect the device of FIG. 11 to a booster circuit 249 ', the voltage source

Telephone line is a socket 71, through which 253 is fed via contacts bl and Z> 8,

Both lines Ll and L 2 are connected by the erasing head working with direct current

be able. 5 ° ER is the one terminal via resistor 254 with

Between the lines L 1 and L 2, in the negative terminal of the voltage source 253, a capacitor 255 and a rebunden are connected in series, while the other erase head terminal is assigned to the contacts 259 via relay winding 257. the contacts el and c2, the contacts 13 and el4 If the contacts 259 are closed, the Mo and the contacts α 10 and all is connected to ground. By tor M in a manner to be described below, this measure is all previously on the tape exciter current. recorded signals deleted before the tape

The line L 2 is also reached via a line 261, the recording head R.

with one terminal of the primary winding 262 of a the supply current for the motor M delivers at DIE

Transformer 263 connected. The line L 1 leads this mode of operation, the voltage source 241, the po-

Via a line 265 and switches D and B to the 60 positive terminal via the normally closed contact of switch F

other end of the primary winding 262. One second connected to ground and its negative terminal

The winding 259 of the transformer 263 is also in contact with the via the contacts c 14 and c 13 with the

one terminal at ground potential, while the other ground motor M is connected.

Terminal via line 271 and switch C A message text is displayed on tape section A 1

and E with the input 245 of the amplifier 249 yer- 63 recorded when the section 229 on the um-

is bound, provided that the device via the telephone line catch the wheel 223 at the opening 225 of the mask

records incoming signals. When the device 227 passes by,

transmits a message text to the telephone line, in order to determine whether the message texts are

19 20

measured have been recorded, you can listen to the negative terminal of the voltage source 241 via the individual tape sections Al .... AX , contacts dl4 and dl5 to the motor M. Then, by moving the tape to the supply reel 171, the reel 171 becomes and the axis 197 rewinds so that the trailing edge is continuously driven by the tape. In addition, there is also a run next to the head R comes to rest. With this 5 power supply to the amplifier feed circuits 249 ' return, the axis 197 and the edge 223 remain on a path that is in synchronicity with the belt from ground via the electrical circuits. 249 ' the voltage source 253, the contacts b 8 and

Now the switches A and B are operated in such a way that fe9 and the contacts d5 and d 6 run to ground,

whose sliding contacts are different with respect to FIG. 11 Finally, the primary winding 262

move right. The feed circuit for the io of the transformer 263 between the lines L1 and

The motor remains unchanged, but now L 2 flows switched so that a direct current loop is created.

the current for the amplifier feed circuits 249 ' from which stands. One terminal of winding 262 is immediately

Voltage source 253 via the contacts fe 8 and b 9 directly connected via the line 261 to the line L 2 .

and the contacts cl6 and cl7 to the ground connection. closed while the other terminal of the winding

The extinguisher egg? is switched off because the contacts 15 262 via the contacts fell and bl2, the contacts

A 10 and A 11 are open. dll and d 18 and line 265 to line Ll

When the first section A 1 of tape 1 is connected to.

Head R passes by, the latter feeds the input The switch E is still in the in

245 of the amplifier 249 via the contacts e4 and e5 Fig. 11 shown switching state. The switches A,

and the contacts α2 and α3. The amplifier output 20 B and C are, however, compared to the position shown

251 is via the contacts a 8 and α 9, the contacts development shifted to the right, so that the switching point

el and e8 and contacts c7 and c8 with which switch E is in a "playback" position.

Speaker S connected. The message text on the The message text on section A 1 of the tape

Section Al is therefore passed through the loudspeaker from Kopfi? via contacts e4 and e5

reproduced. 25 and the contacts a 2 and a 3 to the amplifier input

If the section Ml at the head? walks past, aisle245. The amplifier output 251 reaches the switch E is actuated so that the sliding contact telephone connection line via the contacts a8unda9 clocks move downwards with respect to FIG. the contacts e 7 and e8, the contacts c8 and c9, now the contacts e4 and e5 as well as el and the line 273, the potentiometer 275 and the e8 are opened, so that the head? and the loudspeaker 30 exchanger 269. Rather S are turned off by the amplifier, the amplitude of the output signal. From this can be adjusted with the help of the potentiometer 275, the result is that the device does not produce any reproduction, while the section Al on the head? while the section Ml passes the head. is running, the erase head ER is switched off.

To use the device as a telephone answering machine As soon as the rear end of the tape section A 1 can, the tape 1 is on the supply reel 35 the head i? reached, the arm 219 of the scarf-171 is rewound and again adjusted so that ters E is free from the recess 209 and then the trailing edge of the leader tape is pressed next to that in the switch housing. As a result, beKopf i? comes to rest. The axis 197 remains in synchronicity because of the sliding contacts of the switch E , so that the visual indicator S appears in the opening 225 of the mask 227 in the downward opening opposite the switch position in FIG. 4 ° If switches .4, B and C, as mentioned above, are

The device can now with the help of the socket 71 to the right compared to the switching position of FIG. 11

connected to the telephone line. The current switching status of the

Switch C changes from switch position »Normal« to switch E to a »Record« position.

brought the switch position »Telephone«, whereby the voice of a calling subscriber

then the sliding contacts with respect to FIG. 11 to 45 generated signals now go to the following

move right. The switches A and B become the amplifier input in a descriptive manner. the

if shifted to the right with respect to FIG. Subscriber line L2 is on line 261 with

The device can now connect an incoming call to one terminal of the primary winding 262.

respond. the. The subscriber line Ll reaches the other

As soon as a ringing current 5 ° terminal of the primary winding 262 arrives in the lines L1 and L 2 via the line, the relay coil 257 is intermittently energized , the contacts dl8 and dl7 and the contacts are energized, and the contacts 259 are energized accordingly & 12 and fell . The secondary winding 269 of the over-closed. The feed current for the motor M flows tragers 263 is connected to the amplifier input 245 via then from the ground connection via the closed contacts c 12 and eil, contacts e 6 and e5 contact of switch F, voltage source 241, 55 and contacts α3 and al connected. The sizum motor appearing at the closed contacts 259 and the contact c 13 output 247 of the amplifier 249 , which in turn reaches the recording head i? the terminal is connected to ground via the contacts. The coil 171 and the axis aS and α6 and the contacts el and e3.
197 are therefore driven intermittently until the incoming message has therefore reached a position on the axis in which the arm 211 ⁵ O records tape section Ml. At this time the switch D comes free from the recess 207 point is also the erase head Ei? in operation as the and into the switch housing 213 is moved. Contacts eil and eil and the contacts α 12 and As a result, the sliding contacts of the shell are all closed.

ters D compared to the switching positions of FIG. 11 If the rear end of the band section Ml

moved downwards, that is, the switch D reaches the head R ^{in 6} 5, the arm 219 of the switch

the switch-on position. ters E back into the recess 209 , so that

, '. If switch D is in the switch-on position, switch E is back in the switching state of

iurig, completes a connection from Fig. 11. This switching state is now

21 22

long the switches ^, B and C in the position "Tele moved to the left so that the movable contact fön" stands, the "playback" position. At the same point in time as switch F, the fixed contact on the left, arm 211 of the switch is also acted upon. As a result, the additional Spanters D is inserted into the recess 207, so that this voltage source 243 is connected to the voltage source 241 in switches in the switch-off 5 series shown in FIG.

position comes in which the power supply to the operation of the device during an operation

Motor M and to the amplifier 249 interrupted and simplified as a pure tape recorder, the

the direct current loop from the subscriber line arrangement according to FIGS. 8 to 11 so modified

is eliminated. as shown in FIG. Here the scarf

The device is now in a state in which it is uncoupled from wheel 199 and axle 197 in io ter C

which an incoming ringing current results in the and pen 195 being omitted.

Message text of the band section A 2 to the line over- In the modified arrangement according to

will wear. 12 there is a wheel on the axle 197 '

During the recording of an incoming 199 ', which rotate independently of the axis

Message on the tape sections Ml .. .MX can be 15. The axial movement of the wheel 199 'on the

there is a possibility of eavesdropping, since the low pressure axis 197 'is limited with ring collars 281,

ken of the monitoring switch 277 of the loudspeaker On one side of the wheel 199 'is a tooth

cher S to the output 251 of the amplifier 249 to ring 283 is provided, to which a corresponding

can be closed. Toothed ring 285 on a ring body 287 opposite-

For listening to the tape sections Ml 20. The ring body 287 engages with projections 289 in ... MX stored messages, the band 1 is longitudinal grooves 291 of the axis 197 '. This connection is rewound back to the supply reel 171 and thus enables the ring body 287 to be set in the longitudinal direction so that the trailing edge of the leader tape comes to lie next to the head R in the axial direction opposite the axis. Moving the device 197 'prevents it from remaining in the "telephone" switch position, ie the rotation between the two parts mentioned.
The sliding contacts of the switch C remain in the opposite position. The ring body 287 is mechanically displaced to the right over FIG. 11. The switches / 4 and B are bound to the switch position which is switched back to actuate the switch C in front of FIG. 11. is seen. This connection is designed so that

Are the switches ^ !, B and C in this 30 with switch C der in the normal position

Position, current flows from the negative terminal of the ring body 287 is uncoupled from the wheel 199 '. In

Voltage source 241 via contacts b 2 and b 1 in this state can wheel 199 'and thus the

and the contact cl3 to the motor M, regardless of whether the coil 171 rotates independently of the axis 197 '

the switching status of switches D and E. If, on the other hand, switch C is in the "Telephone" -

Find. The feed current for the amplifier feed position, the ring body 287 engages in the wheel 199 '

circles 249 'flows through the contacts b 7 and b 8, so that the axis 197' together with the coil

When the band portion Al BY- head R revolves 171st

runs and the switch E is shown in Fig. 11. Teeth 283 and 285 can also be passed through

Replace the loudspeaker S from the coupling claws.

Amplifier 249 separated because the contacts el and 40 A separate switch that is operated with

c 8 are open. The erase head ER is separated, the switch A is combined, can be switched to the

since the contacts el and el and the contacts eil erase head ER connect to the latter in the

and fast are open. The microphone socket »recording« position, if the message texts are on the

72 is connected to the input 245 of the amplifier 249. Tape sections Al ... AX are recorded,

bound. But since no microphone is used to excite 45.

the amplifier receives no input either. The relay winding 257 and contacts 259 let-

Head R is connected to the amplifier output 247 via the sen also through a semiconductor rectifier

Replace contacts e4 and eS and contacts α4 and aS tern-controlled switches, as is

connected. dation with the F i g. 2 to 7 has been described.

When the band portion Ml reaches the head of R, 50 is still in connection with FIGS. 9 to 11 erwerden the sliding contacts of the switch E counter imagines that the power supply to the motor M and the switching positions of Fig. 11 downward different to the electrical circuits of the shifted. Now the head R is over the advises is interrupted when the sliding contact contacts e3 and el and the contacts al and al of each contact group of the switch D is in the amplifier input 245. The speaker S is 55 in the middle position, so that only the middle one fixed contact is applied to the amplifier output 251 via the contacts, but not an external fixed contact el8 and el7 and the contacts al and a8 . The game between the pushers. The recorded message of the tape contact and an external fixed contact depends on section M1 can thus be heard on the loudspeaker 5 depending on the shape of the recess 207, the relationship. In this interception mode, the 60 is between the recess 207 and the erasing head that is to be deleted. switched off because the contacts el, el cooperating part of the arm 211 and the rela- and also the contacts all and a 12 are open. tive distance between the fixed contacts.

If the tape sections A1 ... AX on the head R If the motor M is a battery while listening, that is, if the powered-down motor digs a low torque cut 229 of the wheel 223 in the opening 225, the remains Axis 197 is presently at a standstill, it seems, the speed of the motor M can be increased when the power source 241 is disconnected from the motor in order to reduce the loss of time. To do this,. When the distance between the relevant is the actuating arm 244 compared to FIG. 11 sliding contact and the outer fixed contact of the

Switch D is small, an arc can occur between these two contacts.

The distance between the sliding contacts and the associated fixed conicals can be increased by being close to the axis 197 of FIG. 8 provides two additional relay contacts and actuates them with a cam that is provided on the axis. These additional relay contacts are connected in series with the two fixed contacts of the switch D in parallel with the motor M and its voltage source 241. The cam has the task of opening the additional contacts and interrupting the motor circuit only when all contacts of switch D are open. The motor M therefore runs until all the contacts of the switch D are open. This prevents arcing.

In order to feed a "beep" tone into the subscriber line, there is a second cam on the axis intended. This cam works with a pair of contacts, which are connected in series in the Oscillator circuit is provided.

The second cam is arranged so that it closes the contacts assigned to it in such a way that the oscillator signals are transmitted to the subscriber line at the end of each message section A 1 ... AX and again shortly before the end of each call message section Ml ... MX will.

In a simplified embodiment, a separate oscillator can also be dispensed with. So the contacts actuated by the second cam can be used to switch between input and Output of amplifier 249 turn on a capacitor, so that the amplifier with a frequency oscillates at about 15 kHz.

13 and 14 of the drawings show a modified embodiment for the coupling 33 in the device according to FIG. 2 to 5. This modified embodiment of the coupling 33 includes a disk 80 which is firmly placed on an axle 82 which carries the supply reel 3 and therefore rotates together with this reel when the roller drive 7, 9 is switched on. Four electrically conductive elements 84, 86, 88 and 90 are attached to the surface of the disk 80, which consists of insulating material. The elements 84 to 90 are evenly distributed in the circumferential direction with respect to the axis 82 and extend in the radial direction over the disk 80.

Two electrical contacts 92 and 94, which are connected to an input 96 of an electromechanical transmitter 98, work together with the disk 80. The contacts 92 and 94 are preloaded on the surface of the disk 80 so that they are short-circuited by the elements 84 to 90 when the latter is rotated. The transmitter 98 drives an output shaft 91 that corresponds to the shaft 91 of FIG. 3 corresponds. This axis 91 also carries a gear 93 which is detachably coupled to a gear 35 of the shift drum 23. The intermediate gear 97 is used to couple the two gears 93 and 95.

As can be seen from FIG. 14 of the drawings, the electromechanical transmitter 98 includes an electric motor 100, its winding (not shown) with the voltage source 45, with the parallel circuit with the contact 43 and the contacts 28 and 30

(see FIG. 2) and is connected in series with the two contacts 92 and 94 of FIG.

When the contacts 43 or the contacts 28/30 are closed, a contact closure causes the Contacts 92 and 94 with one of the elements 84 through 90 of the disc 80 supply a pulse of current to the motor winding.

The motor 100 drives a shaft 104 which drives the aforementioned output shaft 91 and a second shaft 108 via a reduction gear 106. At one end of the axis 108 there is a pivot arm 110 which carries a sliding contact 112 made of electrically conductive material. The sliding contact 112 is isolated from the arm 110.

The sliding contact 112 is assigned an insulating disk 114, which is aligned coaxially with the axis 108 and fixed in a stationary manner. At the same angular spacing, eight conductive elements 116 to 130 are attached to the surface of the disk 114 and extend radially inwards from the edge of the disk approximately halfway. The disk 114 is designed so that the sliding contact 112 sweeps over the disk surface on a circular path in which the angular distance between adjacent elements 116 to 130 is somewhat greater than the length of the sliding contact. The sliding contact 112 can thus never short-circuit two adjacent elements 116 to 130.

The elements 116 to 130 of the disk 114 are connected to a manifold 132 with one clamp the current source 45 and connected to the contact 92. The sliding contact 112 is via a line 134 connected to contact 94.

If you use the device according to FIG. 2 to 5 modified by using a coupling according to FIG. 13 and 14, it works exactly as described above with the exception of the following changes.

When the tape 1 is rewound from the supply reel 3 to the take-up reel 5, they rotate Spool 3, the axle 82 and the disc 80, so that with each revolution of the spool and disc the Contacts 92 and 94 are bridged four times by elements 84 to 90. When the contacts 28 and 30 are closed, a current pulse is passed from the voltage source 45 to the winding of the motor 100. This happens four times per revolution of the disk 80.

Each current pulse for the motor development has the consequence that the motor output shaft 104 rotates and corresponding rotations of the axes 91 and 108 also occur. By rotating the axis 91, the shift drum 23 is rotated. The rotation of the second axis 108 has the consequence that the sliding contact 112 is moved in a clockwise direction in relation to the position in FIG. 14 in order to act on the element 118 of the disk 114 . The duration of each pulse is selected so that the sliding contact 112 acts on the elements 118 before the pulse is interrupted by the expiry of the contacts 92 and 94 from one of the elements 84 to 90.

If the contacts 92 and 94 of one of the elements mentioned have expired and are no longer connected to them, the motor development still receives a feed current from the voltage source 45 via the line 132, the element 118, the sliding contact 112, the arm 110 and the line 134 . This current is maintained for so long, until the axis has 108 from rotating so far that the sliding

209 581/160

25 26

Contact 112 from element 118 expires. Subsequently movably attached to the pin 142

ßend the current is interrupted, so that the arranges and provided with a slot 148 in the

Rotation of axes 91, 104 and 108 and which engages one end of a bimetal strip 150,

Shift drum 23 stops. the other end with a screw 152 on the

All subsequent current pulses attached by the 5 base plate 140. On a tenon 156

Elements 84 to 90 of the disc 80 at the base plate 140 is a second pawl

bridging the contacts 92 and 94 are generated, 154, which with the help of a leaf spring 158 against the

also cause a small rotation of the teeth of the ratchet wheel 136 is pressed.

Axes 91, 104 and 108 and the shift drum 23. The pawls 144 and 154 are two

Frequency at which the successive three io cooperating contacts 160 and 162, the

movements of the shift drum 23 take place, corresponds to that are attached isolated from the pawls.

Frequency of the current pulses from the voltage source The contact 162 is with the contact 92 of the

45. This frequency depends on the speed of rotation of the pulley 80 connected. The contact 160 is with the

Disc 80 and coil 3. On the other hand, one terminal of a heating coil 164 is connected,

Angle over which the shift drum 23 in these 15, which has the task of the bimetallic strip 150

Moved small twists, starting from the time over which to heat up. The other terminal of the heating coil

the rotation of the sliding contact 112 is maintained 164 via the contacts 43 connected in parallel

remains, ie of the dimensions of the sliding contact and 28/30 and the voltage source 45 with the

112, connected by the angular distance between two contacts 94.

adjacent elements 116 to 130 etc. Thus, this arrangement according to the invention works in a similar way.

the duration of the sliding contact 112 longer than borrowed as the arrangement according to FIGS. 13 and 14 with

the duration of each current pulse. Exception of the following. Bridging the

The circuit with the voltage source 45, the two contacts 92 and 94 through the conductive EIe-

Contacts 43 and contacts 28/30 supplies besides element 85 of the disc 80 causes a current

the current for the series connection with the winding 25 pulse from the voltage source 45 via the heating

of the motor 100 and the contacts 92 and 94 also winding 164, the closed contacts 160 and

the current for the electrical circuit 47, which 162 and the closed contacts 43 or 28/30.

the motor for the tape drive roller 7 feeds. From this the energy and the duration of the current impulses are sufficient

it follows that whenever the contacts 43 and the off, the bimetallic strip 150 to a previously fixed

Contacts 28/30 are open, the motor for the 30 set temperature is above the ambient temperature

The drive of the tape transport roller 7 and also the winding are heated up so that the strip can be

ment of the motor 100 receives no power. From this, the pawl 144 bends opposite the pin 142

it follows that even if the drive of the roller 7 rotated so counterclockwise. This takes effect

is switched off that the coil 7 and the pawl 144 into the teeth 138 and moves the

Washer 80 is in settings in which the 35 ratchet wheel 136 continues to one of the teeth 138 . the

Contacts 92 and 94 from one of the elements 84 to rotation of the ratchet wheel 136 is accompanied by one

90 are bridged, the motor 100 does not have an exciter rotation of the axis 91 and the

electricity can receive. The sliding contact 112 is coupled to the shift drum 23.

therefore not rotated, comparable to another During the movement of the ratchet wheel 136

Start switching cycle. 40 pivot both pawls 144 and 154 with respect to the

Another device designed according to the invention, FIG. 15, in the counterclockwise direction, the converter likewise using a tape according to FIG. 1 of bars 160 and 162 remain closed. At the end of the drawings and an electrical circuit according to the movement of the ratchet wheel 136 , however, FIG. 2. The pawl 154 used for the electrical circuit in the next tooth. In this case, clutch 33 corresponds to the clutch assembly 45 results in a rotation of the pawl 154 in Uhrgemäß Fig. 13 with the exception of a change in loading indicator direction, which is sufficient to maintain the contacts open züglich the electrically conductive elements on the 160 and 162.

Washer 80. In this further embodiment, when the contacts 160 and 162 are open, the electromechanical transmitter 98 of the coupling current flow from the voltage source 45 to the heating arrangement 33 is designed in such a way that the winding 164 is interrupted so that the bimetallic F i G. 15 of the drawings shows. strip 150 cools down again. When the

In the embodiment according to FIG. 15, the strip 150 carries the pawl 144 in the clock disk 80 only moves a single electrically conductive element further until the pawl comes free of the tooth 138 in front of it, which is semicircular and is designed in the form of a semicircle and under the action of the spring 146 on the following tooth disk 80 with every half turn of the coil 3 and the two associated contacts 92 and can come to rest. The movement of the pawl 94 is bridged. 144 to the plant on the next following tooth is

In the embodiment according to FIG. 15, accompanied by a slight rotation of the

the electromechanical transmitter 98 consists of a pawl 144, in which a reclosing of the

Ratchet 136 with a large number of teeth 60 gives contacts 160 and 162.

138. The ratchet wheel 136 is rotatable on a The size and duration of the heating coil

Base plate 140 stored and there mechanically with the voltage source 45 supplied energy must

of the axis 91 of FIG. 13 may not be sufficient to place the bimetallic strip 150 on the

put funds coupled. to bring the aforementioned temperature at which the

The base plate 140 carries a first pawl 144 on a pin 142 65 ratchet wheel 136 by the width of a tooth, which is rotated with the aid of a leaf spring. It is also tensioned for a sufficient pre-146 against the teeth 138 of the ratchet wheel 136 length of the current pulse from the voltage source. Preferably, the pawl 144 loading 45 is to provide, by the disk 80 with a one

electrically conductive element 85 provides, as FIG. 15 shows. From this figure it can be clearly seen that element 85 contacts contacts 92 and 94 for one half revolution of disk 80 each and coil 3 bridged.

If the above-described operations are repeated, the total time required to heat strip 150 from ambient to the predetermined temperature and to rotate ratchet 136 enough to break contacts 160 and 162 is constant. This constant time is shorter than the time in which the contacts 92 and 94 are bridged by the element 85 of the disc 80. The end of the current pulse from voltage source 45 is therefore determined by the opening of contacts 160 and 162 . During the time in which the strip 150 cools down again to ambient temperature, the contacts 92 and 94 are opened by the element 85 of the disk 80 running off before the contacts 160 and 162 are closed again.

There is then no further current pulse to heat the strip 150 until the contact element 85 of the disk 80 bridges the contacts 92 and 94 again.

From the above description it can be seen that each time the contacts 92 and 94 are bridged by the contact element 85, the ratchet wheel 136 and thus also the shift drum 23 are moved on over a predetermined angular path. the

The frequency with which this rotation is carried out depends on the speed of the spool 3. On the other hand, the angle of rotation of the shift drum 23 for every small rotation depends on the design of the ratchet wheel 136 , in particular on its tooth pitch.

It should also be noted that the coupling according to FIG. 13 and 14 or according to FIG. 15 can be used for the telephone answering machine according to FIGS. In such a case, the electromechanical clutch is used to connect the take-up reel 171 to the shift drum, ie the axis 197 .

For this purpose 3 sheets of drawings

Claims (25)

Patent claims: 1. Telephone answering machine with call recording for connection to a magnetic tape, this in sections that extend over the length of the tape, with message texts and recording strips is provided, consisting of a non-rotatable connection between the supply and the take-up reel with their associated Drive shafts, a tape drive, a recording and playback head attached to a certain point of the tape path is arranged between the reels, an amplifier, a Detector, which is intended for the reception of a ringing current arriving on a subscriber line is and when receiving the Rufstrom operated the tape drive, and a switch for Reversal of the message text on the recording and playback head 2 » between this and the amplifier input and between the amplifier output and the Subscriber line existing connections during the passage of a between the Message texts lying tape section on the recording and playback head, characterized in that that the switch (23) is connected to one of the coils (3) via a coupling (33) and when performing a predetermined number of shifts in synchronism with the reel rotation and the movement of the unwinding from the supply reel (3) and tape (1) wound on the take-up reel (5). 2. Telephone answering machine according to claim 1, characterized by a display device for the switch position of the switch (23). 3. Telephone answering machine according to claim 2, characterized in that the display device has a visual indicator. 4. Telephone answering machine according to claim 2 or 3, characterized in that the display device consists of a rotatable wheel (35, 223) on which markings are attached to indicate the switch position. 5. Telephone answering machine according to claim 1 to 4, characterized in that the of the rotating coil (3) driven switching device a rotary switch (23) with at least two electrical contacts is. 6. Telephone answering machine according to claim 1 to 5, characterized in that the switching device (23) with a power source (71) and a relay winding (21) is connected in series to the relay contacts (59-69) depending on the requirements of the input (13) and the output (15) of the amplifier (17 ) to connect to the recording and playback head (R) or to the subscriber line (L 1, L 2) and to reverse the switching connections. 7. Telephone answering machine according to claim 1 to 6, characterized in that the switching device is a roller switch (23), the cylindrical roller surface of which contains electrically conductive parts (109) and insulating parts (107) , which with sliding contacts abutting the cylinder surface (73-79 ) work together. 8. Telephone answering machine according to claim 7, characterized in that the jacket (99) of the shift drum (23) is formed by a layer of insulating material (107) which carries an outer electrically conductive layer (109) which is partially worked off down to the insulating material (107) . 9. Telephone answering machine according to claim 5 to 8, characterized in that the circumferential Part of the rotary switch (23) with one of the tape reels (3) via a disengageable clutch (33) is connected. 10. Telephone answering machine according to claim 9, characterized in that the coupling (33) contains an adjusting device (98, 102) which, in the uncoupled state, brings the rotating part of the rotary switch (23) into a predetermined starting position. 11. Telephone answering machine according to claim 5, 6, 9 and 10, characterized in that the Rotary switch is a cam switch (Figs. 8 to 10). 12. Telephone answering machine according to claim 1 to 11, characterized in that the coupling (33) between the switching device (23) and the one tape reel (3) one of the reel circulation controlled electrical signal generator (92, 94 / 84-90) and an electromechanical Transmitter (98), which is fed by the signal generator and drives the rotating switch part contains. 13. Telephone answering machine according to claim 12, characterized in that the signal generator (92, 94 / 84-90) a predetermined number with each revolution of the driving tape reel (3) generated by current pulses with which the transformer (98) turns the rotary switch (23) rotated a predetermined angle. 14. Teleforian answering machine according to claim 12 and 13, characterized in that the transmitter (98) an arrangement (Fig. 14, 15) contains the pulses from the signal generator (92, 94 / 84-90) extended so that the switching device (23) is rotated for a period of time, which is greater than the pulse duration. 15. Telephone answering machine according to claim 14, characterized in that the signal generator (92, 94 / 84-90) is connected in parallel with a second signal generator which has longer switch-on times and consists of at least one fixed contact (116-130) and one from the motor (100 ) of the electro-mechanical transmitter driven circulating contact (112) exists. 16. Telephone answering machine according to claim 15, characterized in that a plurality of fixed contacts (116-130) are attached at equal angular intervals and connected to a common connecting line for the circulating contact (112) of the second signal generator on the circumference of an insulating disk (114) . 17. Telephone answering machine according to claim 12, characterized in that the electro-mechanical Transmitter (136) when a single pulse is supplied, the rotating switch part in one Multiple small twists moved on. 18. Telephone answering machine according to claim 17, characterized in that the electro-mechanical transmitter has a thermostat (150) with a heating coil fed by the pulses (164) contains which, when it is thermally deformed, the rotary switch (23) via a previously fixed angular path and then the supply of the current pulse to the heating coil (164) interrupts, so that the thermostat (150) cools down and moves to the next switching movement Returns to the starting position. 19. Telephone answering machine according to claim 18, characterized in that the electro-mechanical Transmitter a ratchet wheel (136) connected to the rotary switch (23) with a pawl (154) and a pawl (144) which is resiliently pressed against the ratchet teeth (138) be that the thermostat (150) at a predetermined temperature change over the pawl (144) moves the ratchet wheel (136) further by at least one tooth and that with the heating coil (164) connected in series and connected to the two pawls (144, 154) Contacts (160,162) close when the thermostat (150) is in the initial position or is deformed by the action of heat, but opened when the pawl (154) in the subsequent The tooth of the ratchet wheel (136) jumps in. 20. Telephone answering machine according to claim 19, characterized in that the thermostat is a Bimetal strip (150) is. 21. Telephone answering machine according to claim 12 to 20, characterized in that the electrical The signal generator is a rotatably mounted disc (80) coupled to the tape reel (3), which a plurality of uniformly over the circumference of the pane surface made of insulating material contains distributed contact elements (84-90) with two fixed electrical sliding contacts (92, 94) and a current source are connected in series. 22. Telephone answering machine according to claim 1 to 21, characterized in that the drive of the tape recorder is a conveyor roller (7) which, together with a counter-pressure roller (9), the tape (1) acted upon at one point on the path between the two coils (3, 5). 23. Telephone answering machine according to claim 1 to 21, characterized in that the tape drive a drive roller (185) is provided, which is connected to the take-up or supply reel (3, 5) is coupled. 24. Telephone answering machine according to claim 23, characterized in that the drive roller (185) engages the take-up reel (5). 25. Telephone answering machine according to claim 1 to 24, characterized by a signal generator (31) which transmits a predetermined signal into the subscriber line (L 1, L 2) and is switched on by the switching device (23) when an intermediate audio tape section (M) is used Recording of a caller message begins to pass the record and playback head (R) .