US3381286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic alarm annunciator circuits
Assignee: All American Engineering Co
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Filing: 1964-06-18
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Granted: 1968-04-30
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Expires: 1984-06-18
Abstract
No abstract record available.
Inventors
- 👤 Robert R Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:30
CPC Classifications
G; G08; G08B; G08B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN AN ALARM ANNUNCIATOR CIRCUIT INCLUDING A POWER SOURCE, AUDIBLE ALARM MEANS AND CONDITIONS RESPONSIVE TRANSDUCER MEANS, MEANS FOR AUTOMATICALLY ENERGIZING AND SELECTIVELY DEENERGIZING SAID AUDIBLE ALARM MEANS COMPRISING RELAXATION OSCILLATOR MEANS SELECTIVELY CONNECTED WITH SAID POWER SOURCE AND ACTUATED BY SAID TRANSDUCER MEANS, PULSE GENERATING MEANS CONNECTED WITH SAID OSCILLATOR MEANS AND PRODUCING ENERGY PULSES IN RESPONSE TO THE ENERGIZATION OF SAID OSCILLATOR MEANS, TRIGGER MEANS ACTUATED BY SAID PULSE GENERATING MEANS, SEMICONDUCTOR SWITCH MEANS ENERGIZED BY SAID TRIGGER MEANS AND CONNECTED IN SERIES WITH SAID SOURCE AND SAID AUDIBLE ALARM MEANS, AND ACKNOWLEDGE MEANS SELECTIVELY DEENERGIZING SAID TRIGGER MEANS AND THUS DEENERGIZING SAID SEMICONDUCTOR SWITCH MEANS, SAID RELAXATION OSCILLATOR COMPRISING RECTIFIER MEANS CONNECTED WITH ONE SIDE OF SAID SOURCE, RESISTANCE MEANS IN SERIES THEREWITH, A SILICON CONTROLLED RECTIFIER HAVING ANODE, CATHODE AND GATE TERMINALS, SAID ANODE TERMINAL BEING COUPLED WITH SAID RESISTANCE MEANS, A LOAD RESISTOR CONNECTED IN SERIES WITH SAID CATHODE TERMINAL AND THE OTHER SIDE OF SAID SOURCE, SAID CATHODE TERMINAL BEING FURTHER COUPLED WITH SAID SEMICONDUCTOR
Claim 2
Dependent Claim
171 words
IN AN ALARM ANNUNCIATOR CIRCUIT INCLUDING A POWER SOURCE, AUDIBLE ALARM MEANS AND CONDITIONS RESPONSIVE TRANSDUCER MEANS, MEANS FOR AUTOMATICALLY ENERGIZING AND SELECTIVELY DEENERGIZING SAID AUDIBLE ALARM MEANS COMPRISING RELAXATION OSCILLATOR MEANS SELECTIVELY CONNECTED WITH SAID POWER SOURCE AND ACTUATED BY SAID TRANSDUCER MEANS, PULSE GENERATING MEANS CONNECTED WITH SAID OSCILLATOR MEANS AND PRODUCING ENERGY PULSES IN RESPONSE TO THE ENERGIZATION OF SAID OSCILLATOR MEANS, TRIGGER MEANS ACTUATED BY SAID PULSE GENERATING MEANS, SEMICONDUCTOR SWITCH MEANS ENERGIZED BY SAID TRIGGER MEANS AND CONNECTED IN SERIES WITH SAID SOURCE AND SAID AUDIBLE ALARM MEANS, AND ACKNOWLEDGE MEANS SELECTIVELY DEENERGIZING SAID TRIGGER MEANS AND THUS DEENERGIZING SAID SEMICONDUCTOR SWITCH MEANS, SAID RELAXATION OSCILLATOR COMPRISING RECTIFIER MEANS CONNECTED WITH ONE SIDE OF SAID SOURCE, RESISTANCE MEANS IN SERIES THEREWITH, A SILICON CONTROLLED RECTIFIER HAVING ANODE, CATHODE AND GATE TERMINALS, SAID ANODE TERMINAL BEING COUPLED WITH SAID RESISTANCE MEANS, A LOAD RESISTOR CONNECTED IN SERIES WITH SAID CATHODE TERMINAL AND THE OTHER SIDE OF SAID SOURCE, SAID CATHODE TERMINAL BEING FURTHER COUPLED WITH SAID SEMICONDUCTOR
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) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |