Patent US3326435A successfully refreshed from Google Patents.
Patent US3846738A successfully refreshed from Google Patents.
Patent US3144898A successfully refreshed from Google Patents.
US3144898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct ignition system
Assignee: Controls Company of America
•
Filing: 1961-08-28
•
Granted: 1964-08-18
•
Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Queever Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:17
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N2227/00; F23N2227/36; F23N2229/00; F23N2231/00; F23N2231/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A FUEL BURNING SYSTEM COMPRISING, AN ELECTROMAGNETIC FUEL VALVE HAVING TWO COILS WHICH JOINTLY PRODUCE SUFFICIENT FORCE TO OPEN THE VALVE WHILE ONE OF SAID COILS ONLY PRODUCES ENOUGH FORCE TO HOLD THE VALVE OPEN, AN ELECTRIC IGNITOR FOR IGNITING THE FUEL, A TIME DELAY SWITCH, ELECTRIC CIRCUIT MEANS FOR ENERGIZING SAID COILS AND SAID IGNITOR WITH THE IGNITOR AND ONE OF SAID COILS CONNECTED IN PARALLEL THROUGH SAID TIME DELAY SWITCH, SAID TIME DELAY SWITCH INCLUDING AN ELECTRIC HEATER FOR ACTUATING THE SWITCH, SAID HEATER BEING CONNECTED IN SERIES WITH THE OTHER OF SAID COILS, A THERMOSTAT FOR CONTROLLING ENERGIZATION OF SAID CIRCUIT MEANS, SAID DELAY SWITCH BEING OPERATIVE WHEN ACTUATED BY ITS HEATER TO DE-ENERGIZE SAID ONE COIL, SAID CIRCUIT MEANS INCLUDING A NORMAL OPEN BRANCH CIRCUIT CLOSED BY SAID TIME DELAY SWITCH WHEN ACTUATED BY SAID HEATER TO CONTINUE THE ENERGIZATION OF THE HEATER TO THEREBY KEEP THE DELAY SWITCH ACTUATED.
Claim 2
Dependent Claim
154 words
A FUEL BURNING SYSTEM COMPRISING, AN ELECTROMAGNETIC FUEL VALVE HAVING TWO COILS WHICH JOINTLY PRODUCE SUFFICIENT FORCE TO OPEN THE VALVE WHILE ONE OF SAID COILS ONLY PRODUCES ENOUGH FORCE TO HOLD THE VALVE OPEN, AN ELECTRIC IGNITOR FOR IGNITING THE FUEL, A TIME DELAY SWITCH, ELECTRIC CIRCUIT MEANS FOR ENERGIZING SAID COILS AND SAID IGNITOR WITH THE IGNITOR AND ONE OF SAID COILS CONNECTED IN PARALLEL THROUGH SAID TIME DELAY SWITCH, SAID TIME DELAY SWITCH INCLUDING AN ELECTRIC HEATER FOR ACTUATING THE SWITCH, SAID HEATER BEING CONNECTED IN SERIES WITH THE OTHER OF SAID COILS, A THERMOSTAT FOR CONTROLLING ENERGIZATION OF SAID CIRCUIT MEANS, SAID DELAY SWITCH BEING OPERATIVE WHEN ACTUATED BY ITS HEATER TO DE-ENERGIZE SAID ONE COIL, SAID CIRCUIT MEANS INCLUDING A NORMAL OPEN BRANCH CIRCUIT CLOSED BY SAID TIME DELAY SWITCH WHEN ACTUATED BY SAID HEATER TO CONTINUE THE ENERGIZATION OF THE HEATER TO THEREBY KEEP THE DELAY SWITCH ACTUATED.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |