US3193732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone controlled relay circuit
Assignee: General Dynamics Corp
•
Filing: 1962-01-02
•
Granted: 1965-07-06
•
Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Donald F Jamieson
- 👤 Niertit Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:49
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/02; H01H47/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
IN A TONE CONTROL CIRCUIT, A TR ANSMISSION CHANNEL, A FILTER COUPLED TO SAID TRANSMISSION CHANNEL FOR DETECTING A TONE TRANSMITTED BY SAID TRANSMISSION CHANNEL, A SWITCHING DEVICE FOR ASSUMING A FIRST STATE UPON THE RECEIPT OF SAID TONE AND FOR ASSUMING A FIRST STATE UPON THE CESSATION OF SAID TONE, MEANS HAVING AN INPUT CIRCUIT COUPLED TO THE OUTPUT CIRCUIT OF SAID FILTER AND HAVING AN OUTPUT CIRCUIT COUPLED TO SAID SWITCHING DEVICE FOR MAINTAINING SAID SWITCHING DEVICE IN SAID FIRST STATE DURING THE APPLICATION OF SAID TONE TO SAID TONE CONTROL CIRCUIT, SAID LASTNAMED MEANS FURTHER INCLUDING A CLIPPER HAIVNG A CLIPPING LEVEL WHICH VARIES PROPORTIONATELY WITH THE STRENGTH OF SAID TONE.
Claim 2
Dependent Claim
114 words
IN A TONE CONTROL CIRCUIT, A TR ANSMISSION CHANNEL, A FILTER COUPLED TO SAID TRANSMISSION CHANNEL FOR DETECTING A TONE TRANSMITTED BY SAID TRANSMISSION CHANNEL, A SWITCHING DEVICE FOR ASSUMING A FIRST STATE UPON THE RECEIPT OF SAID TONE AND FOR ASSUMING A FIRST STATE UPON THE CESSATION OF SAID TONE, MEANS HAVING AN INPUT CIRCUIT COUPLED TO THE OUTPUT CIRCUIT OF SAID FILTER AND HAVING AN OUTPUT CIRCUIT COUPLED TO SAID SWITCHING DEVICE FOR MAINTAINING SAID SWITCHING DEVICE IN SAID FIRST STATE DURING THE APPLICATION OF SAID TONE TO SAID TONE CONTROL CIRCUIT, SAID LASTNAMED MEANS FURTHER INCLUDING A CLIPPER HAIVNG A CLIPPING LEVEL WHICH VARIES PROPORTIONATELY WITH THE STRENGTH OF SAID TONE.
Claim 3
Dependent Claim
89 words
IN A RELAY CONTROL CIRCUIT, A COIL, A TRANSISTOR HAVING AN EMITTER, BASE AND COLLECTOR, A CONTROL SIGNAL SOURCE, A SOURCE OF OPERATING POTENTIAL, MEANS FOR COUPLING SAID SIGNAL SOURCE TO SAID EMITTER AND FOR COUPLING SAID COIL WITH SAID COLLECTOR AND SAID SOURCE OF OPERATING POTENTIAL IN A COMMON BASE CONFIGURATION, AND MEANS COUPLED BETWEEN SAID EMITTER AND SAID COIL FOR TRANSFERRING AT LEAST A PORTION FO THE BACK-E.M.F. DEVELOPED WITHIN SAID COIL TO SAID EMITTER TO DECREASE THE TUN-ON AND TURN-OFF TIME OF SAID CURRENT CONTROL DEVICE.
Claim 4
Dependent Claim
89 words
IN A RELAY CONTROL CIRCUIT, A COIL, A TRANSISTOR HAVING AN EMITTER, BASE AND COLLECTOR, A CONTROL SIGNAL SOURCE, A SOURCE OF OPERATING POTENTIAL, MEANS FOR COUPLING SAID SIGNAL SOURCE TO SAID EMITTER AND FOR COUPLING SAID COIL WITH SAID COLLECTOR AND SAID SOURCE OF OPERATING POTENTIAL IN A COMMON BASE CONFIGURATION, AND MEANS COUPLED BETWEEN SAID EMITTER AND SAID COIL FOR TRANSFERRING AT LEAST A PORTION FO THE BACK-E.M.F. DEVELOPED WITHIN SAID COIL TO SAID EMITTER TO DECREASE THE TUN-ON AND TURN-OFF TIME OF SAID CURRENT CONTROL DEVICE.
References Cited (Backward Citations)
US2890352A
Cited
US2928002A
Cited
US3042839A
Cited
US3049650A
Cited
US3084265A
Cited
US3098180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |