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GB1246509A - Electric source and control circuits of a telephone apparatus - Google Patents

Electric source and control circuits of a telephone apparatus

Info

Publication number
GB1246509A
GB1246509A GB5501668A GB5501668A GB1246509A GB 1246509 A GB1246509 A GB 1246509A GB 5501668 A GB5501668 A GB 5501668A GB 5501668 A GB5501668 A GB 5501668A GB 1246509 A GB1246509 A GB 1246509A
Authority
GB
United Kingdom
Prior art keywords
capacitor
prepayment
coin
nov
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5501668A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tamura Electric Works Ltd
Original Assignee
Tamura Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tamura Electric Works Ltd filed Critical Tamura Electric Works Ltd
Publication of GB1246509A publication Critical patent/GB1246509A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/023—Circuit arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Prepayment Telephone Systems (AREA)

Abstract

1,246,509. Automatic exchange systems; prepayment substations. TAMURA ELECTRIC WORKS Ltd. 20 Nov., 1968 [25 Nov., 1967], No. 55016/68. Heading H4K. In a prepayment substation, a capacitor C2 is charged via resistors R1 and the line wires from central battery E whenever the handset is lifted. A.C. tone reverted over the line by closure of contacts 3 (as, for example, when a called party replies) is detected by a tuned circuit consisting of capacitor C1, transformer 6 and diode D1 so that when capacitor C3 is sufficiently charged a transistor 7 is slowly turned-on. Capacitor C2 thereafter discharges through the transistor and a coincollecting relay 8 which is thus brought-up in order to energize a coin-collecting mechanism (not shown). Instead of a coin-collect operation, the relay may operate a counter for counting the number of calls.
GB5501668A 1967-11-25 1968-11-20 Electric source and control circuits of a telephone apparatus Expired GB1246509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7533467 1967-11-25

Publications (1)

Publication Number Publication Date
GB1246509A true GB1246509A (en) 1971-09-15

Family

ID=13573237

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5501668A Expired GB1246509A (en) 1967-11-25 1968-11-20 Electric source and control circuits of a telephone apparatus

Country Status (1)

Country Link
GB (1) GB1246509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2355418A1 (en) * 1976-06-15 1978-01-13 Sodeco Compteurs De Geneve Refund system for coin:operated telephones - uses low power CMOS circuits calculating credit and initiating refund relay, powered from capacitor during power failure (NL 19.12.77)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2355418A1 (en) * 1976-06-15 1978-01-13 Sodeco Compteurs De Geneve Refund system for coin:operated telephones - uses low power CMOS circuits calculating credit and initiating refund relay, powered from capacitor during power failure (NL 19.12.77)

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