US4771452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone call duration control
Assignee: Individual
•
Filing: 1987-03-20
•
Granted: 1988-09-13
•
Expires: 2007-03-20
Abstract
Abstract A telephone timing device comprising a synchronous motor driven timer energized by a circuit having at least one switch activated by removing the handset from its cradle to start a time cycle. The telephone owner preselects the talking time by setting the timer which disconnects the telephone at a the predetermined time following an audible few seconds warning time to the telephone users. Once started the circuit completes each time period to reset the telephone for a subsequent talking time period. A locked housing containing the timer surrounds the telephone modular wall outlet jack.
Inventors
- 👤 Ronald G. Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:55
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/28; H04M15/30; H04M1/00; H04M1/66; H04M1/667; H04M1/67
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
202 words
A motor driven timing control for a telephone set including a handset and a cradle therefor, and at least two telephone wires, the cradle having a first telephone circuit closing switch in series with at least one of said telephone wires and including a switch arm biased to close the telephone circuit closing switch by manually lifting the handset off of the cradle and having a first motor energizing switch, said first switch closed upon off hook of the handset, further comprising: a synchronous motor driven timer having an angularly rotating dial and having a plurality of radially projecting fingers disposed in circumferentially spaced relation around its periphery; timer motor energizing wires connecting a source of electrical energy with said motor; a normally open circuit means interposed in one motor wire including said first switch being in series and driving said motor when closed, a second telephone circuit closing switch in series with one of said telephone wires normally closed and opened by said projecting fingers after a predetermined time period following said first switch being closed; thereby limiting the length of time in which the handset can be off hook and maintain a closed telephone circuit for said predetermined time period.
Claim 2
Dependent Claim
202 words
A motor driven timing control for a telephone set including a handset and a cradle therefor, and at least two telephone wires, the cradle having a first telephone circuit closing switch in series with at least one of said telephone wires and including a switch arm biased to close the telephone circuit closing switch by manually lifting the handset off of the cradle and having a first motor energizing switch, said first switch closed upon off hook of the handset, further comprising: a synchronous motor driven timer having an angularly rotating dial and having a plurality of radially projecting fingers disposed in circumferentially spaced relation around its periphery; timer motor energizing wires connecting a source of electrical energy with said motor; a normally open circuit means interposed in one motor wire including said first switch being in series and driving said motor when closed, a second telephone circuit closing switch in series with one of said telephone wires normally closed and opened by said projecting fingers after a predetermined time period following said first switch being closed; thereby limiting the length of time in which the handset can be off hook and maintain a closed telephone circuit for said predetermined time period.
Claim 3
Dependent Claim
45 words
The telephone timing control according to claim 1 in which said normally open circuit means further includes: a third switch connected in parallel with said first switch for maintaining said timer motor energized through said predetermined time period each time said first switch is closed.
Claim 4
Dependent Claim
30 words
The telephone timing control according to claim 2 and further including: audible signal means including an audible signal circuit actuated by another one said finger at a second predetermined time.
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |