Patent US3559121A successfully refreshed from Google Patents.
US3559121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven operating mechanism for circuit breaker
Assignee: General Electric Co
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Filing: 1969-03-03
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Granted: 1971-01-26
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Expires: 1989-03-03
Abstract
Abstract AN ELECTRICAL SWITCHING DEVICE OF THE TOGGLE TYPE HAVING MOTOR-DRIVEN MEANS TO EXTEND, A TENSION SPRING ASSEMBLY AND HOOK MEANS FOR SECURING A MOVABLE CONTACT ARM IN AN OPEN POSITION AGAINST THE EXTENDED SPRING. THE MOTORDRIVEN MEANS IF THEREAFTER RETRACTED AND RELEASE OF THE CONTACT ARM HOOK MEANS CAUSES RAPID POSITIVE ENGAGEMENT OF THE CONTACTS. EMERGENCY MANUALLY OPERABLE MEANS IS ALSO PROVIDED.
Inventors
- 👤 David B Powell
- 👤 Rodney L Naas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:51
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/66; H01H71/70
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |