SU82995A1 - Calling device for selective calling - Google Patents

Description

This invention relates to devices for selectively calling telegraph stations.

Known devices for selectively calling out telegraph stations do not allow turning off start-stop regenerators on the street through clearing stations when sending a selective call, as well as making a series of calls to a number of intermediate stations.

In the proposed device, these drawbacks are eliminated by using enabling relays.

In addition to controlling the finder and call signaling, according to the invention, an enabling circuit is used to automatically turn on the regenerator for the duration of the passage of typed pulses and then turn it off. This circuit consists of two slow and one immediate telephone relays.

The invention is illustrated by the diagrams in FIG. 1 and 2.

Fig. 1 is a schematic diagram of a ringing device, which shows: a step finder and one polarized relay PI, two slowed down to release telephone relays - Po with deceleration of at least 0.3 s and RZ with deceleration of 0.2 s, one telephone relay P4, and ONE pulse relay PR.

The last contact of the searcher serves to turn on the circuit in its initial position.

The second to last finder contact is used to call all stations of the trunk circularly, one of the contacts is needed to call this end station, and the remaining contacts are intended to call intermediate stations. In the case of using a ringing device for service communication, if there is a service communication switch at the terminal station, two contacts must be included for this station. One of these contacts is used to call the terminal of the service link channel and the other contact is to call the service link switch directly.

KonnymamZ | service meetings

Editor S.I. Zotov.

Sub. to pec. 23.IX.61 g. Format boom. 70 X lOS / ie. Volume 0.52 ed. l

Zak 2206 / 6. Circulation 220. Price And cop.

TsBTI under the Committee on Inventions and Discoveries

under the Council of Ministers of the USSR, Moscow, Center, M. Cherkassky Lane, 2/6.

Printing house, Sapunova Ave., 2.

Proofreader N. V. Shcherbakova.

relay PI returns to the left contact, relay Ra attracts, and the relay of the relay is left without current, regardless of the further supply of current pulses from the line. To stop the signal and return the searcher to the initial position, the button Kn is pressed. This triggers the relay Pi and blocks through its contacts 1-2, and contacts 3-4 closes the circuit for the pulse relay through brush G and the searcher electromagnet. When the finder reaches the 77th position with the brushes, the brush G opens the pulse-relay circuit, the finder stops, the coil Rc is bridged through the brush B, the latter releases the measles and the circuit arrives to its original position. During the passage of the 9th position with the brushes, the call is not sent to the service switch, since the relay P's switch has been turned on and its contacts 7-8 are open.

3. Call the station that does not correspond to the number of this ringing device.

When a call is received that is intended for some other station, for example station No. 3, the relays Pb РЗ and РЗ work similarly to those described for station No. 5. The searcher stops at the 5th position and after releasing the relay РЗ attracts and blocks the relay P. Subsequently, when the seeker moves to the // - e position, releasing and unlocking the relay P occurs according to the above. With the passage of the brushes of the 5th position, the signaling at the Afa 5 station will not work, since contacts 5-6 of the relay Pa, are open. If the called number was more than 5, then contacts 5-6 of relay P.i were closed with the 5th position finder brushes, however, the signaling could not be triggered, since contacts 4-5 of the relay RZ were open.

4. Circular call.

In the case of a circular call, the brushes of the seekers of all ringing devices are stopped in the / Oth position and an alarm is triggered at all stations.

When examining the scheme, it was found out that the relay pin of the relay of the relay remains attracted only for the duration of the pulse duration of the dialer pulses. Contacts 8-9 of the relay are intended to turn off the start-stop regenerator at those points where it can be installed in order to be able to pass ringing pulses further along the line that would be distorted by the regenerator.

After passing a series of pulses, when contacts 8-9 open, the regenerator automatically shuts off.

The principle of operation of the circuit for automatically switching on and off the trunk line with the service communication switch is as follows.

In the absence of calls from the trunk and the switch, the latter is disconnected from the service circuit by the contact springs of the relay.

When the sweeper brushes of the ringing device are stopped at the 5th position, the positive potential of the battery enters the terminal 3 of the device, as a result of which the warning lamp Cl. (Fig. 2) and relay P1z is activated, connecting the service channel. By changing the polarity of the voltage applied to the switch, a call is received on it. When a plug is inserted into the socket of a given channel, the measles of the transmitting relay on the switch are transferred to a contact with a negative potential, the measles of the relay Pij are transferred to the positive contact, the relay Pi2 attracts, the contacts 1-2 and 3-4. When the contacts 5-4 are closed, the clamps / and-2 of the ringing device are short-circuited, the relay P (Fig. 1) attracts, receiving plus through the ninth contact of the searcher in the distribution A, along the Circuit: terminal 2, contacts -5, Relay Relay clamp 1 and resistance following # 82995

five &

Or

Mr.-OOL

| R

QJ

(4J

ic