US3760101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coin telephone circuit
Assignee: QUADRUM SA DE CV A CORP OF MEXICO
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Filing: 1972-01-24
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Granted: 1973-09-18
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Expires: 1992-01-24
Abstract
Abstract A coin telephone circuit operable by minor strapping changes in the prepay, semi-postpay and emergency service modes of operation. Included is an electronic totalizer which permits the phone to be programmed for any initial deposit rate required. Audio frequency signals are applied to the telephone line, corresponding to the value of the coins deposited and in prepay service provides an indication to the central office that the proper rate has or has not been deposited.
Inventors
- 👤 R Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:08
CPC Classifications
H; H04; H04M; H04M17/00; H04M17/02; H04M17/023
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
167 words
A coin operated telephone instrument adapted for connection to a telephone central office by means of a telephone line, including a transmitter, a receiver, and a calling device, the improvement comprising the inclusion of a totalizer circuit operated in response to deposit of coins in said telephone, to transmit tone signals representative of the value of said deposited coin via said line to said telephone central office, and further operated in response to deposit of at least one coin equivalent in total value, to a predetermined value to permit establishment of a circuit connection to a selected telephone station requiring the deposit of at least one coin in said coin operated telephone instrument; said totalizer comprising coin signal generating means operated in response to deposit of at least one coin and rate circuit means including first counting means connected to said coin signal generating means, electrically operated in response to said coin signal generating means, to permit establishment of said circuit connection to said selected telephone station.
Claim 2
Dependent Claim
167 words
A coin operated telephone instrument adapted for connection to a telephone central office by means of a telephone line, including a transmitter, a receiver, and a calling device, the improvement comprising the inclusion of a totalizer circuit operated in response to deposit of coins in said telephone, to transmit tone signals representative of the value of said deposited coin via said line to said telephone central office, and further operated in response to deposit of at least one coin equivalent in total value, to a predetermined value to permit establishment of a circuit connection to a selected telephone station requiring the deposit of at least one coin in said coin operated telephone instrument; said totalizer comprising coin signal generating means operated in response to deposit of at least one coin and rate circuit means including first counting means connected to said coin signal generating means, electrically operated in response to said coin signal generating means, to permit establishment of said circuit connection to said selected telephone station.
Claim 3
Dependent Claim
47 words
A coin operated telephone instrument as claimed in claim 1 wherein: said receiver further includes a circuit connection to said coin signal generating means, said receiver muted in response to operation of said coin signal generating means during transmission of said tone signals to said central office.
Claim 4
Dependent Claim
62 words
A coin operated telephone instrument as claimed in claim 2 wherein: said receiver circuit connection to said coin signal generating means includes an amplifier connected to said receiver and switching means connected between said coin signal generating means and said amplifier, said switching means operated in response to said coin signal generating means to render said amplifier inoperative thereby muting said receiver.
Claim 5
Dependent Claim
110 words
A coin operated telephone instrument as claimed in claim 1 wherein: said coin signal generating means comprise a pulse source, second counting means connected to said pulse source conditioned in response to said pulse source, a plurality of coin operated switches each operated in response to deposit of a different denomination of coin in said telephone instrument to operate said conditioned second counting means, a tone source connected to said telephone line and switching means connected between said tone source and said second counting means, said switching means operated in response to said second counting means to operate said tone source thereby to transmit tones to said telephone central office.
Claim 6
Dependent Claim
60 words
A coin operated telephone instrument as claimed in claim 4 wherein: said coin signal generating means further include a speed-up circuit operated in response to deposit of at least one coin of a predetermined value to increase the rate of pulses generated by said pulse source, whereby the repetition rate of tones transmitted to said telephone central office is increased.
Claim 7
Dependent Claim
57 words
A coin operated telephone instrument as claimed in claim 4 wherein is further included: a reset circuit including circuit connections to said second counting means, operated in response to the receipt of line potential from said telephone central office, to reset said second counting means prior to deposit of at least one coin in said telephone instrument.
Claim 8
Dependent Claim
51 words
A coin operated telephone instrument as claimed in claim 1 wherein: said rate circuit means further include a rate relay; and latching means connected between said first counting means and said rate relay, said latching means operated in response to operation of said first counting means, to render said relay operated.
Claim 9
Dependent Claim
51 words
A coin operated telephone instrument as claimed in claim 7 wherein: there is further included reset means, connected to said first counting means, operated in response to line potential from said central office, to reset said first counting means prior to deposit of at least one coin in said telephone instrument.
Claim 10
Dependent Claim
64 words
A coin operated telephone instrument as claimed in claim 1 wherein: said rate circuit means are connected to said transmitter, said transmitter rendered operable in response to said rate circuit means after deposit of at least one coin equivalent in total value to said predetermined value thereby permitting establishment of a talking circuit connection to a selected telephone station on a semi-postpay operational basis.
Claim 11
Dependent Claim
76 words
A coin operated telephone instrument as claimed in claim 1 wherein: there is further included a coin relay including circuit connections to said rate circuit means; and in response to operation of said rate circuit means said calling device and said coin relay rendered operable, thereby permitting establishment of circuit connections to said selected telephone station after deposit of at least one coin equivalent in total value to a predetermined value, on a prepay operational basis.
Claim 12
Dependent Claim
86 words
A coin operated telephone instrument as claimed in claim 1 wherein there is further included: a coin relay connected to said rate circuit means; said rate circuit means conditioned for operation in response to deposit of at least one coin equivalent in total value to said predetermined value, and said conditioned rate circuit means operated in response to a reduction in voltage across said line to connect said coin relay to said telephone line to permit establishment of a circuit connection to a selected telephone station.
Claim 13
Dependent Claim
85 words
A coin operated telephone instrument as claimed in claim 7 wherein: said rate relay includes switching contacts connected to said telephone line; and a diode connected across said switching contacts to provide a coin detection path through said coin relay; whereby transmission of a polarized potential over said line from said telephone central office after a predetermined period of time can effect collection of deposited coins and determine the deposit of additional coins, whereby a phone conversation may be extended beyond an initial predetermined period.
Claim 14
Dependent Claim
83 words
A operated telephone instrument as claimed in claim 7 wherein: said telephone instrument is adapted for semi-postpay operation, by the inclusion of a first circuit connection between a first side of said telephone line and said rate relay; a second circuit connection between said rate relay extending to said receiver and to a second side of said telephone line, a third circuit connection between said rate relay and said transmitter and a fourth circuit connection between said latching means and said rate relay.
Claim 15
Dependent Claim
44 words
A coin operated telephone instrument as claimed in claim 7, wherein; there is further included a coin relay connected to said rate relay; said coin relay connected to said telephone line in response to operation of said rate relay to a first operational state.
Claim 16
Dependent Claim
44 words
A coin operated telephone instrument as claimed in claim 14 adapted for prepay operation by the further inclusion of a circuit connection between said rate relay said said calling device, said calling device conditioned for operation in response to operation of said rate relay.
Claim 17
Dependent Claim
60 words
A coin operated telephone instrument as claimed in claim 14, adapted for emergency calling operation by the further inclusion of a circuit connection between said telephone line and said rate relay, said rate relay operated in response to a reduction in voltage across said telephone line, to a second operational state to disconnect said coin relay from said telephone line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |