SU36487A1 - Selective call device - Google Patents

Description

The author's certificate f 29513 describes a selective call device using direct current.

The present invention is a modification of the said device. Its essence lies in the application at a translation point of a selector with a modified scheme, in which the trap is turned on as a disk, and the disk as a trap.

The diagram shown in the drawing is the ringing part of the telephone station farther.

The scheme allows the end station to be called by sending a current pulse, and the intermediate station is called by some number of fast-following pulses of one direction defined for a given point.

At intermediate translation points, the translation scheme does not require any rework. The linear relay 1 and operating 2 remain as in the case of ac call, and the switching on of the batteries only changes.

(348)

The rotator is abolished. Its excitation circuit remains unclosed. The ringing current clips are connected to the battery terminals — the polarity is indifferent. Self-induction 3 serves to smooth the pulses sent to the next item. Directly to the line clamps of one of the stations is connected a selector 4 without a condenser. The selector has reconnected ends. The code disk is attached directly to the winding, and the trap 5 is connected to the clamp instead of the disk. Thus, the ring chain is broken in two places and if the call is not intended for this item, then when the disk passes over the contact, a false call will not occur, because at this moment trap 5 will not be connected to the disk, and the chain is formed when the contact is closed and held in this position by a trap.

At the end station, the long-range station is included in the long springs: Slide 6; The middle springs are connected to the socket 7, and the outer ones go to the battery. The battery is fed through sequentially connected, normally closed contacts of the keys 8. The latter serve to call intermediate points. Resistors 3 and capacitors 10 are used to connect a telephone operator's headset at the time of making a call with a key. Attachment is necessary to obtain call control,

The current location when making a through call is as follows: the telephone operator presses the button entering jack 6. The battery current 11 enters the line. Revenue is up to the translation point, the current affects the linear relay 1, which can be replaced by a simple telephone relay, which closes the operating relay circuit 2, the contacts of which connect the anode battery with the line and send the ringing current pulse further. A portion of the incoming current is branched off to the selector 4. A measles that is attached to one side will hold the selector in that position until the call is terminated.

If it is necessary to call the translation point, the telephone operator presses the button of the socket 6 and starts the key 8. Rotate the key to give a certain number

the current interrupts and, since these ceres will be insignificant in time, the selector will have time to work and connect the disk to the contact. At this point, the current circuit will be reduced by lowering the key spring into the ring cut 12 All selectors will return to normal. position with the exception of selects with a setting corresponding to the number of pulses being sent, which at this moment will have a disk grinding wheel in the path of the trap. This selector will close the avonka circuit. When returning to the normal position, its contacts will close and will be sent in line “returning the impulse. But the selector will only open the contact, and not return to its original position, because there is no current in the capacitor circuit and the measles will be pulled to one of the rollers. All devices are in the normal position after turning off the corresponding pins of the socket 6.

The subject matter of the invention.

Modification of the device nq to the author's certificate No. 295i3, which is used in the translation point of the selector with a modified scheme, in which the trap is turned on on the disk and the disk as a trap.

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