Alarm latching circuit
Abstract
Abstract A REMOTE CONTROL CIRCUIT FOR A D.C. ACTUATED ALARM APPARATUS HAS BEEN PROVIDED WHICH INCLUDES A COIL, AN ARMATURE ACTUATED IN RESPONSE TO ENERGIZATION OF THE COIL, A NORMALLY CLOSED SET OF SPRING BIASED BREAKER POINTS SERIALLY COUPLED TO THE COIL AND OPENED BY THE ACTUATION OF THE ARMATURE. AN IMPEDANCE BRIDGES THE POINTS FOR MAINTAINING CIRCUIT CONTINUITY REGARDLESS OF THE CONDITION OF THE POINTS. AN ALARM CONDITION SENSING MEANS COMPLETES THE CIRCUIT IN RESPONSE TO THE ALARM CONDITION. A NORMALLY NON-CONDUCTIVE TRIAC SEMI-CONDUCTOR HAS ITS MAIN CONDUCTION PATH SERIALLY COUPLED WITH THE COIL AND ITS GATE ELECTRODE COUPLED TO THE ALARM CONDITION SENSING DEVICE FOR TRIGGERING CONDUCTION OF THE TRIAC AND ACTUATING THE COIL IN RESPONSE TO SAID CIRCUIT COMPLETION.
Inventors
- 👤 Charles Berns
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |