US3562733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric circuit breaker with improved trip alarm
Assignee: General Electric Co
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Filing: 1967-12-15
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Granted: 1971-02-09
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Expires: 1987-12-15
Abstract
Abstract A TRIP ALARM FOR SIGNALLING ONLY WHEN THE CIRCUIT BREAKER TRIPS DUE TO OVERLOAD CURRENTS, INCLUDING A FIRST SET OF CONTACTS CLOSED BY THE TRIPPING ACTION OF A TRIP UNIT AND A SECOND SET OF CONTACTS CLOSED BY THE TRIPPING MOVEMENT OF THE BREAKER MECHANISM, THE CLOSING OF THESE CONTACTS COMPLETES THE CIRCUIT TO A RELAY WHICH ACTUATES THE TRIP ALARM AND ALSO CLOSES CONTACTS BY-PASSING THE FIRST SET OF CONTACTS TO MAINTAIN THE CIRCUIT THROUGH THE TRIP ALARM EVEN THOUGH THE TRIP ALARM RETURNS TO THE UNTRIPPED CONDITION.
Inventors
- 👤 Frank H Murphy
- 👤 Henry E S Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/46; H01H2071/467; H01H71/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |