EMERGENCY CIRCUITRY FOR COIN TELEPHONE

• US 3,804,984 A
• Filed: 01/25/1972
• Issued: 04/16/1974
• Est. Priority Date: 01/25/1972
• Status: Expired due to Term

• Current Assignee: Brand-Rex Willimatic Ct.
• Original Assignee: Jerry J. Yachabach
• Inventors: Yachabach, Jerry J.
• Primary Examiner(s): Cooper, William C.
• Application Number:
  US05/220,662
• Time in Patent Office: 812 Days
• Field of Search: 179/6.3R,9R,9B
• US Class Current: 379/36
• CPC Class Codes: H04M 17/02 Coin-freed or check-freed systems , e.g. mobile- or card-operated phones, public telephones or booths

Abstract

A coin telephone system having an emergency circuit by providing coin free access to an emergency operator and alternately coin free service to a general purpose telephone operator without requiring the usual dialing of an emergency number or '"'"''"'"''"'"''"'"'0'"'"''"'"''"'"''"'"'. A push button is provided for automatically '"'"''"'"''"'"''"'"'dialing'"'"''"'"''"'"''"'"' the emergency number for the emergency operator by a circuit which generates electrical pulses which are counted to predetermined numbers by an electric counter and transmitted over the usual telephone circuitry so as to provide the conventional dialing signals for the numbers of the emergency call. Similarly, a second push button is provided which provides for operating a circuit for counting pulses generated by the system to provide the regular telephone circuitry with a digital indication of the number '"'"''"'"''"'"''"'"'10'"'"''"'"''"'"''"'"' or '"'"''"'"''"'"''"'"'0'"'"''"'"''"'"''"'"' which will alert the general purpose telephone operator. Both of these push buttons are operable without the deposit of a coin by providing for bypassing the conventional coin controlled circuitry of the telephone.

Claims

1. In a telephone system having a call station with a telephone and conventional switch means for initiating call signals from said call station through an exchange with lines extending therebetween for supplying energizing signal and voice voltages to said call station for completing calls from said call station, circuit breaker means operable by said phone for closing a telephone energizing circuit responsive to placement of said telephone in an operative condition, auxiliary automatic dialing means having means for automatically generating a first predetermined number in the form of dialed pulses to provide access from said call station to an emergency operator, means for automatically generating a second predetermined number in the form of dialed pulses to provide access from said call station to a general purpose operator, an initial delay enabling circuit for energizing said telephone system to enable access to each of said operators without operation of said conventional switch means and for providing a predetermined time delay prior to generation of either of said first or second predetermined numbers, latching circuit means for enabling the generation and transmission of either of said predetermined numbers upon initiation of operation of said auxiliary automatic dialing means irrespective of subsequent operation of said automatic dialing means, said auxiliary automatic dialing means comprising an oscillator for generating digital pulses having a predetermined timing frequency, a logic circuit receiving the output of said oscillator for halving the frequency of said digital pulses, a counter circuit for counting the pulses generated by said oscillator, and a pulse switch circuit responsive to the output of said logic circuit for transmittal of said digital pulses produced by said oscillator to thereby provide predetermined emergency digit signal pulses over said lines from said call station to said exchange, and means responsive to replacement of said call station telephone in a non-operative position for resetting said auxiliary means to an initial restartable condition.

2. A telephone system auxiliary means as defined in claim 1 including means for setting said auxiliary means in a predetermined starting condition during said initial delay.

3. A telephone system auxiliary automatic dialing means as defined in claim 1 wherein said call station is a coin-responsive operating means station and said auxiliary means includes means for bypassing said coin-responsive operating means for energizing said auxiliary means.

4. A telephone system auxiliary automatic dialing means as defined in claim 1 wherein said auxiliary means includes a manually operable circuit-closing means for energizing said pulse generating circuitry in response to closure of said circuit closing means.

5. A telephone system auxiliary automatic dialing means as defined in claim 4 wherein said manually operable circuit-closing means comprises means for selectively counting and transmitting one of a plurality of predetermined sets of digit signal pulses.

6. A telephone system auxiliary automatic dialing means as defined in claim 5 wherein said selective means includes an AND-OR mode select and system latch gate for selecting a predetermined operating mode and latching the system for generating a predetermined set of digit signal pulses.

7. A telephone system auxiliary automatic dialing means as defined in claim 6 wherein said selective means includes means for providing a predetermined delay in digital pulse generation betweeN digital signals representing the predetermined digits of the set selected by said manually operable circuit-closing means.

8. A telephone system auxiliary automatic dialing means as defined in claim 4 wherein said auxiliary means includes a latching circuit connected to said pulse generating circuitry and to said circuit closing means for latching the energization of said pulse generating circuitry for the duration of the generation of said predetermined emergency digit signal pulses by said pulse generating circuitry regardless of operation of said circuit closing means to open and subsequent closed positions, and means for stopping signal pulse generation on completion of said predetermined emergency digit signal pulses.

9. A telephone system auxiliary automatic dialing means as defined in claim 4 wherein said auxiliary emergency pulse means includes means for resetting said auxiliary means to an initial starting condition responsive to initial closure of said manually operable circuit closing means and prior to energization of said pulse generating circuitry.

10. A telephone system auxiliary automatic dialing means as defined in claim 4 wherein said latching circuit is connected to said pulse generating circuitry and to said circuit closing means for latching the energization of said pulse generating circuitry for the duration of the generation of said predetermined emergency digit signal pulses by said pulse generating circuitry regardless of operation of said circuit closing means to open and subsequent closed positions, and means for stopping signal pulse generation on completion of said predetermined emergency digit signal pulses, and wherein said auxiliary means includes means for resetting said auxiliary means to an initial starting condition responsive to initial closure of said manually operable circuit closing means and prior to energization of said pulse generating circuitry.

11. A telephone system auxiliary automatic dialing means as defined in claim 1 wherein said oscillator means provides a substantially 60 percent break and 40 percent make pulsing ratio.

12. A telephone system auxiliary automatic dialing means as defined in claim 11 wherein said oscillator means comprises means for providing a 600 millisecond minimum interdigit time.

13. A telephone system auxiliary automatic dialing means according to claim 1 wherein said logic circuit comprises a divide-by-two flip-flop circuit.

14. A telephone system auxiliary automatic dialing means according to claim 1 wherein said oscillator is a relaxation oscillator.