SU1257854A1 - Device for limiting tariff interval of coin-box telephone - Google Patents

Abstract

The invention relates to the field of telecommunications. The purpose of the invention is to increase the reliability of the device operation. The goal is achieved by introducing a time relay 24 into the device, which is connected to a control terminal with the first wire of the line under investigation on the side of the automatic telephone exchange, as well as a specific circuit implementation of the time relay. Time relay 24 includes a standby tone signal generator 16, a cyclic binary counter 17 pulses, a driver 18 that enables the counting signal, elements And 19 and 20, an electronic switch 21, a counting relay 22 and a closing contact 23 of the counting relay. Gil.

Description

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4 The invention relates to the field of telecommunications, namely, to payphones of local telephone conversations and is an improvement of the basic invention according to the author's certificate No. 1202071. The aim of the present invention is to improve the reliability of the device. The drawing shows a structural electrical circuit of a payphone tamping device, a payphone teller device contains a weight control unit 1, a switching unit 2, a talk unit 3, the first wire of communication line 4, a second wire of communication line 5, a coding electromagnet 6, a diode 7, which closes contact 8 electromagnet of cassation 6, coin contact 9, electromagnet of additional payment 10, open contact 11 of electromagnet of additional payment 10, disconnecting contact 12 of electromagnet of additional payment 10, coin 13, gate 13, coin channel 14, generator 15 time of the impulses, the modulating 16 tone signal generator, the cyclic binary counter 17 pulses of the phytometer 18 permissive signal, the first and second elements 19 and 20, the electronic switch 21, the counting relay 22 and the closing contact 23 of the counting relay, are part of time relay 24, microtelephone handset 26, The payphone teller device works as follows; Coin contact 9 is made on a reed switch. The payphone is connected to the line wires in such a way that, in the initial state, on one product is positive, and on the other, the polarity of the voltage from the PBX is negative. When removing the background telephony from the payphone lever, the switching unit 2 connects the payphone to the wires lines. This creates a chain in the spoken path; plus on one wire, block 2, block 3, diode 7, block 2, minus on the other wire. Diode 7 shunts the windings of electromagnets 6 and 7, therefore electromagnets are de-energized. While the contact 8 of the electromagnet 6 and the contact 12 of the electromagnet 10 are closed. Coin 13 is closed and the coin is placed in the coin acceptor. The subscriber will hear the station's buzzer and dial the called party number. After the removal from the PBX side, voltage is re-charged on the first and second wires of communication lines 4 and 5, and as a result of the polarity reversal, the current in the conversational path changes and the diode 7 stops shunting the casing electromagnet 6 winding bypasses unit 3 of the payphone to the talk charge. At the same time, the tamping electromagnet 6 opens the coin flap and the coin enters the coin channel 14. If the payment is made correctly, under the influence of the mass of the coin, the end of the weight control assembly 1 moves relative to the axis and brings the permanent magnet to the coin contact 9, which closes and connects the napajmenbHo winding of the electromagnet 6, the winding of the electromagnet 10, the electromagnet of the additional charge 10 is activated and switches its opening and closing contacts 11 and 12, the electromagnet 6 of cassation de-energizes, opens its deputy Close the contact 12, creating a talking state of the payphone, and close the coin gate 13. After affecting the end of the weight control unit 1, the coin continues to move along the coin channel 14 to the piggy bank, and the weight control unit 1 returns to its original state the Although the permanent magnet moves away from the coin contact 9 and the latter opens, the additional charge electromagnet 10 remains energized due to the closed state of its closing contact 12, the payphone circuit is in a conversational state before the signal from the PBX comes in for the extra charge for the conversation, after the tariff interval has elapsed, the PBX equipment sends a warning tone to the calling subscriber about the need to make a surcharge and, after some time, sends a signal for caching the surcharge, the short-term voltage reversal on the wires of the line. A brief polarity change on the wires causes the diode 7 to bypass the coil of the extra charge electromagnet 10 and the break contact 11 is closed, and the contact 12 is open. After restoring the polarity of the voltage on the wires of the lipid communication 4, 5. In the talking state, the diode 7 stops shunting the winding of the electromagnets 6 and 10. The tampering electromagnet 6 is activated and reopens the coin gate 13 and closes the closing contact 8, shunting the talker 3 of the payphone . If the surcharge is made correctly, the coin enters the coin channel 14 and, moving along it, acts on the end of the weight control unit 1, which leads its end with a permanent magnet to the coin contact 9, which is closed, including the electromagnet of the additional charge 10, triggered, it triggers its disconnecting and closing contacts 11 and 12. Cassation electromagnet 6 is disconnected by disconnecting contact 11, therefore the coin gate 13 is closed, and closure contact 8 of casing electromagnet 6 is opened. Subscribers have the opportunity to continue the conversation during the next tariff time interval. The coin, moving along the coin channel 14, falls into the piggy bank, and the weight control node 1 returns to its original state. The coin contact 9 is opened, however, the coil of the additional charge electromagnet 10 remains in operation due to the closed condition of the closing contact 12. In the event of underpayment or an incorrect additional charge, the permanent magnet does not affect the coin contact 9 and the circuit remains in the precollege. can be either billed or rebounded. When the microphone-telephone handset 26 is removed, the switching unit 2 connects a talkphone unit 3 to the first and second wires 4 and 5 of the telephone line. The connection is made in such a way that in the initial state on the first wire 4 of the telephone line from the PBX there is a positive polarity. This creates a circuit: the first wire 4, the switching unit 2, the talking unit 3, the diode 7, the switching unit 2, the second wire 5. The subscriber hears the buzzer. station answer and dials the number of the called subscriber. After the called subscriber answers with a paid connection from the station 1 4 side, the voltage is reversed on the first and second wires 4 and 5 of the telephone line, and a circuit is formed: the second wire 5, the switching unit 2, the disconnecting contact 11 of the electromagnet 10, the talker unit 3, the switching unit 2 and the first wire 4. The electromagnet 6 is activated and by its closing contact 8 shunts the talking unit. The microphone is de-energized. At the same time, after polarity reversal, shaper 18 generates a signal which is fed to the P input of a cyclic binary counter 17, thereby allowing the pulse counting with the following period T b c at the input +1, i.e. the countdown begins. The impulses of time are generated by the generator 15. After the coin in the payphone passes through the node 1 of the weight control of coins, the reed contact 9 is closed, creating a power supply circuit of the electromagnet 10, which by its contact 12 bridges the reed contact 8 for self-blocking. The opening contact of the electromagnet 10 opens the circuit of the electromagnet 6, which releases and by means of the contact 8 removes the shunting of the conversational unit 3. Thus, conversational conditions are provided. During a conversation, 24 seconds and 12 seconds before the end of the tariff interval, a three-second signal with a frequency of 1000 Hz from the waiting tone signal generator 16 is transmitted via the first element 19 and 19 to the payphone 3 relative to the ground. The second element And 20 decrypts a time interval of 180 s. After 180 s from the beginning of the account, i.e. after polarity reversal, at the output of the second element I 20, a signal is generated, which is fed through an electronic switch 21 to the counting relay 22, which briefly connects the ground to the first wire 4. At the same time, the second electromagnet 10 is released. At the same time, the ground is quickly connected to the ground 18 which ensures the prohibition of the counting of a cyclic binary counter 17, which has switched to the zero state. When resetting the cyclic binary counter 17, the counting relay 22 releases, opening its closing contact 23 and removing the ground from the first wire 4 of the telephone line. Electromagnet 6 is activated, which, by its contact 8, again shunts conversational unit 3.

Claims (1)

To continue the conversation, it is necessary to lower the coin again, and the whole process will be repeated, i.e. the time relay starts up again. Invention Formula The tactile device of the background taxi according to author's certificate No. 1202071, characterized in that, in order to ensure the reliability of the device, a time relay has been introduced, the control output of which is connected to the first wire of the telephone line on the side of the automatic telephone station, and the time relay contains a time pulse generator , waiting tone generator, cyclic binary counter-pulses, driver of the counting signal, first and second elements AND, electronic key, counting relay and closing to ntakt counting relays, with output a time pulse generator is connected to a counting input of a cyclic binary pulse counter and a control input of a waiting tone generator, the output of which is connected to the first input of the first element I, the first, second, third and fourth outputs of the cyclic binary counter of pulses are connected to the corresponding first, second, the third and fourth inputs of the second element And, the output of which is connected through an electronic key with the output of the counting relay, the first, second and fourth outputs of a cyclic binary counter The pulses are connected to the corresponding second, third and fourth inputs of the first element I, the output of which is connected to the first output of the closing contact of the counting relay and the input of the former of the counting-enabling signal, the output of which is connected to the P input of the cyclic binary pulse counter, and the second output of the closing contact of the counting relay connected to the grounding conductor, with the control output of the time relay being the first output of the closing contact of the counting relay.