DE713241C - Circuit arrangement for tariff switching in coin telephones with mechanically driven coin zone adjuster - Google Patents

Description

Circuit arrangement for tariff switching in coin-operated telephones with mechanically driven coin zone adjuster The invention relates to a circuit arrangement for tariff switching in day and night traffic from coin operated telephones with are equipped with a meck 'amsch, driven coin zone adjuster.

It is known in payphones, in which the automatic Charge control by switching mechanisms adjusted by the coin and dialing impulses in the office is exercised, in the connection path between, charge selector and zone selector changeover contacts to be arranged for the tariff changeover. With coin-operated telephones, where the through Coin slot and switch to be adjusted by the dial accordingly The switches to be set in the coin-operated telephone according to the dialed identification number of the connection are arranged themselves, de tariff switching offers considerable. lent difficulties since the switching means must be arranged so that they can communicate do not disturb and are controllable by the office, without the other for cashing and return of the coins required. To impair switching operations. These difficulties are overcome according to the invention that in the connecting paths between Coin and zone setter Changeover contacts one by a power surge from the office operated auxiliary relays are provided, the contact system in the working position persists until the relay contacts again due to a further current surge is returned to the rest position. Relay with a contact that reacts to each power surge is turned over and remains in this position until after another power surge: ' the contact is returned to the initial position are known per se. Another feature of the invention is to control this Umschaltelae Alternating current is used, which is switched to both lines simultaneously by means of Ührjkontakte will. In order to prevent the call from being closed when the line is busy disturb, is according to a further feature of the invention in the input transformer of the Office provided a relay arrangement through which the triggered by the clock contact Control pulse is saved and automatically given over the line as soon as the Line has become free after hanging up the receiver. The busy status of the line is characterized by a closed-circuit relay connected to the c-wire, that dominates the relay arrangement controlled by the clock contact.

In the drawing, the switching devices are on the left of the payphone and on the right side the office facilities. By inserting coins, the coin setter ATÜ is set to the amount in a known manner of the inserted amount. According to the chosen The identification number of the connection is set by the zone setter Zo to that of the selected zone brought the appropriate step.

The number disk pulse contact is labeled nsi. Furthermore, a decade contact is controlled by the dial that is to be closed in the third dial stage. When the receiver is picked up, the hook switch contacts IHU to 3 HU are switched and the office loop is closed. The relay R picks up and leaves the preselector VW in a known manner, the drive magnet of which is designated VM and is controlled by the relay interrupter RU. After turning in the preselector VW, the closed circuit of the high-resistance relay X is interrupted by the contact arm VW III. Since the zone setter Zo is adjusted during the dialing, the interruption of the office loop occurring during the adjustment of the zone setter Zo is bridged by the capacitor Cl of very high capacity.

Let us assume that the connection established, which is to correspond to zone, 1, requires the charge of So 9'pf in daily traffic and the charge of 5o A'qj in night traffic. To continue dialing after dialing the connection identification number, the coin setter must be on step So 2p1 after the money has been inserted, otherwise the office loop would be interrupted after setting this zone setter to zone 4. When hanging the handset, the relay Z comes in a known manner to attract when the participant had reported. Via the contact z the cashier magnet attracts: .r "f. battery, z, z HU, IBM, spur, earth and lä (. ', t inserted into the payphone into the cassette fall because the blocking magnet SpM, which prevents the coins from running into the return container and which was already attracted when the handset was lifted via its winding SpM I, remains in the circuit below after the handset has been hooked up until the voters are in office have collapsed; 2. Earth, late, S >> M II, 3 HU, S !! 11 I, 211, 2t, VW I, control relay A in the group selector, battery.

If the subscriber did not answer, the cashier impulse given by the contact z does not materialize, so that after the blocking magnet Spt11 has dropped, the money that has been thrown into the pay phone as a preliminary step is released. Return container is supplied. For the tariff changeover the clock contact uh is provided in the office, which causes the relay U to pick up temporarily via the winding UI. As mentioned, the relay X is a high-resistance closed-circuit relay, so that when the line is not occupied, the relay X is energized via the contact arm VW III of the preselector and interrupts the holding circuit running via the winding U 1I by contact 5 x. Since the contacts 2 x and 3 x are closed when the line is not occupied, an alternating current surge, which is supplied by the transformer Tr, is briefly applied simultaneously to both line wires through the contacts i tt and 2 u , so that the changeover relay Um over its two windings Um I and Um Il to attract. The contacts i um, 2 um ... are moved, as follows: now in the assumed example of a connection to zone 4. no longer the amount of So Xnf, but the amount of 50.9.97f in the pay phone. If the clock contact uk closes when the line is busy, the relay U holds itself via its winding U 1I over: 3rd earth, 5 x, 3 u, U Il, battery.

As soon as the line has become free, the relay X picks up and interrupts the holding circuit for relay U. During the release time of the delayed relay U, alternating current is again switched to both line wires via the contacts 2 x, 3 x as well as iu and 2 u, so that . the control pulse triggered by the clock contact tak subsequently acts on the changeover relay Um. The changeover relay Um should, as already mentioned, be designed in such a way that the contacts i um, 2 um ... are switched over when the relay armature is tightened and remain in the position until the relay armature is triggered by another current surge; again comes to attract. In the case of a local connection, the zone setter is set to step i, so that the coin setter must be set to step io; Wlr by inserting coins. If the speaking guest fails to insert the money, then the number disk impulse contact is short-circuited in the third selection stage by the contact dk and the step O of the coin setter, so that further selection is prevented.

The pay phone is immediately ready to talk to an incoming call. The blocking magnet SpM does not attract when the receiver is lifted, since the feed current coming from the line selector flows in the opposite direction over the line wire than when it is fed from the group waver. The blocking magnet SpM I is short-circuited by the rectifier GI for the current direction coming from the line selector. The capacitor C2 is provided in order not to weaken the speech currents through the blocking magnet SpM I located in the line.

Claims (4)

PATENT CLAIMS: i. . Circuit arrangement for the time-of-day-dependent tariff changeover in the coin-operated telephone with mechanically driven coin-zone adjuster located therein, characterized in that, in the connecting paths between coin-adjuster (Mü) and zone adjuster (Zo), switching contacts (i uin, 2 um ... ) have one are auxiliary relay actuated by an impulse from the Office (to) are arranged, whose contact material remains in the working position, until by a further current surge: is returned to the contact material (i to, 2 to ...), the relay (Um) back into the rest position. 2. Circuit arrangement according to claim i, characterized in that for the control of the changeover relay (Um) in the coin-operated telephone alternating current is used, which is switched simultaneously to both branches by clock contacts. 3. Circuit arrangement according to claim i and 2, characterized in that the switchover pulse given by the exchange when the line is busy of the line stored in a relay arrangement (U) of the input transmitter in the office and is given automatically over the line as soon as the line is hung up of the listener has become free. 4. Circuit arrangement according to claim i to 3, characterized characterized in that the free state of the line by a connected to the c-wire Quiescent current relay (X) is marked, which the holding circuit .ein of the clock pulse controlled auxiliary relay (U) that controls the current surge causing the switchover sends over the line.