SU24006A1 - Automatic indicator of the expiration of the talk time on the coin-operated telephone - Google Patents

Description

In the proposed automatic indicator of the expiration of the talk time on the coin-operated telephone automat, the well-known counting ratchet mechanism is used, which acts on the contacts of the signal circuit at a certain, predetermined position of this mechanism. The invention consists in the fact that two relays operating in the local chains of the calling and called subscriber relays are used to turn on the pulse relay controlling the movement of the ratchet mechanism.

The drawing shows a diagram of the proposed device, the operation of which is reduced to the following. After the transfer of the caller from the distribution table to the July terminal, linear relay R2C will operate, contact 2 will close and turn on the winding of relay K1P. The anchor of this relay cannot be pulled to the core, as it is held mechanically by the associated spring 1. When the callee picks up the handset, the short circuit relay will operate and contact 3 will close, turning on the R2n relay. The core of the last prt is no corresponding measles, arranged in such a way that the retaining spring 1 slider 4 at the same time moves to the left (according to the drawing). Spring 1 will be able to bend and Rin measles to the core. Pin 5 opens and turns off the K2P relay. The end T of the spring 1 is thrown into the teeth of the ratchet wheel MI-. Attached to the core, the measles K1P will close contact 6 and turn on the CZP pulse relay that controls the movement of the wheel Mz-. The latter has a tooth BZ, which, when the wheel M rotates, enters the teeth of the wheel Mi and moves the last one turn in time by the size of the tooth pitch. Spring 1 keeps the wheel MI from reverse rotation. There is a contact K on this wheel, which after a certain time will fit under the contacts Ks of the signal circuit and close them. Talking will receive a warning signal about the expiration of the talk time. Upon further movement of the wheel D, the contact fC will close the contacts of the If and turn on the 2n and 4l lamps, after which the telephonist will disconnect the subscribers. In order for the time period from the moment the lamps light up to the moment of separation of subscribers, the wheel Fg does not rotate, a part of its circumference is devoid of teeth. After the disconnection of subscribers, the RHIn R2n switches off, their measles will move away from the cores under the action of springs, and the spring P will return the wheel D to its previous position.

On the wheel Yes, contacts and K all the time slide. KOTOpbie opens only when insulating plate 7 fits under contact E. This corresponds to the position of wheel D at which its tooth BZ is against the first tooth of wheel D. Thus, for example, In case of disconnection of subscribers and before the expiration of the set time, the wheel D will continue to rotate, so as the power pulse relay does not stop until the wheel Yes makes the set number of revolutions and does not take the previous position, under which KZ will turn out the plate 7 of the invention.

Yavromatic indicator of the expiration of a talk time on a coin-operated telephone machine using a counting ratchet mechanism to send signals to the subscribers and a telephone operator about the expiration of a talk time, characterized in that two relays RLII and RSIJ are used with an RSII pulse-relay control circuit that controls the movement of the ratchet mechanism. operating in local circuits of the calling and called subscriber's linear relays, measles of which relags are mechanically interconnected so that the calling subscriber's Rin cannot pull Measles to your core before ;; pr until it is released by a holding spring connected to the callee's relay cortex and also intended to keep the above-mentioned ratchet from rotating in the opposite direction.

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