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US3238992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-state control system
Assignee: American Radiator and Standard Sanitary Corp
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Filing: 1964-01-24
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Granted: 1966-03-08
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Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 Forbes Norman Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/24; F23N5/242; F23N1/00; F23N1/08; F23N1/082; F23N5/20; F23N5/203; F23N2223/00; F23N2223/08; F23N2227/00; F23N2227/02; F23N2227/28; F23N2227/36; F23N2231/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A CONTROL SYSTEM COMPRISING A SOLENOID OPERATED VALVE, A CIRCUIT BREAKER COUPLED IN SERIES WITH SAID SOLENOID OPERATED VALVE, A DIODE COUPLED IN SHUNT WITH SAID SOLENOID OPERATED VALVE, A SOURCE OF ELECTRICAL ENERGY COUPLED TO FEED SAID DIODE AND SAID SOLENOID OPERATED VALVE, A SILICON CONTROLLED RECTIFIER INTERPOSED BETWEEN SAID SOURCE OF ELECTRICAL ENERGY AND SAID DIODE AND SOLENOID OPERATED VALVE, A THERMOSTAT TURN-ON MEANS INTERPOSED BETWEEN SAID THERMOSTAT AND SAID SILICON CONTROLLED RECTIFIER TO INITIATE ACTIVATION OF SAID SOLENOID OPERATED VALVE WHEN SAID THERMOSTAT CALLS FOR HEAT, TEMPERATURE SENSITIVE MEANS POSITIONED TO DETECT THE TEMPERATUTE OF WATER IN A BOILER COUPLED TO SAID TURN-ON MEANS TO INHIBIT THE ACTIVATION OF SAID SOLENOID OPERATED VALVE WHEN SAID THERMOSTAT CALLS FOR HEAT DURING THAT PERIOD WHEN THE TEMPERATURE OF THE WATER IS ABOVE A PRESELECTED VALUE IGNITION CONTROL MEANS FED BY SAID TURN-ON MEANS TO GENERATE AN IGNITION SPARK WHEN SAID THERMOSTAT CALLS FOR HEAT, AND TURN-OFF MEANS COUPLED TO TERMINATE THE OCCURRENCE OF AN IGNITION SPARK UPON OCCURRENCE OF A FLAME AND OVER-
Claim 2
Dependent Claim
174 words
A CONTROL SYSTEM COMPRISING A SOLENOID OPERATED VALVE, A CIRCUIT BREAKER COUPLED IN SERIES WITH SAID SOLENOID OPERATED VALVE, A DIODE COUPLED IN SHUNT WITH SAID SOLENOID OPERATED VALVE, A SOURCE OF ELECTRICAL ENERGY COUPLED TO FEED SAID DIODE AND SAID SOLENOID OPERATED VALVE, A SILICON CONTROLLED RECTIFIER INTERPOSED BETWEEN SAID SOURCE OF ELECTRICAL ENERGY AND SAID DIODE AND SOLENOID OPERATED VALVE, A THERMOSTAT TURN-ON MEANS INTERPOSED BETWEEN SAID THERMOSTAT AND SAID SILICON CONTROLLED RECTIFIER TO INITIATE ACTIVATION OF SAID SOLENOID OPERATED VALVE WHEN SAID THERMOSTAT CALLS FOR HEAT, TEMPERATURE SENSITIVE MEANS POSITIONED TO DETECT THE TEMPERATUTE OF WATER IN A BOILER COUPLED TO SAID TURN-ON MEANS TO INHIBIT THE ACTIVATION OF SAID SOLENOID OPERATED VALVE WHEN SAID THERMOSTAT CALLS FOR HEAT DURING THAT PERIOD WHEN THE TEMPERATURE OF THE WATER IS ABOVE A PRESELECTED VALUE IGNITION CONTROL MEANS FED BY SAID TURN-ON MEANS TO GENERATE AN IGNITION SPARK WHEN SAID THERMOSTAT CALLS FOR HEAT, AND TURN-OFF MEANS COUPLED TO TERMINATE THE OCCURRENCE OF AN IGNITION SPARK UPON OCCURRENCE OF A FLAME AND OVER-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |