Patent US2300339A successfully refreshed from Google Patents.
Patent US3081386A successfully refreshed from Google Patents.
US3081386A
Expired / Lapsed
US
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Circuit breakers
Assignee: Cutler Hammer Inc
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Filing: 1960-01-07
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Granted: 1963-03-12
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Expires: 1980-01-07
Abstract
No abstract record available.
Inventors
- 👤 Martin F Koenig
- 👤 Alexander J Pastene
- 👤 Lloyd D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:09
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/1009; H01H71/1027; H01H71/12; H01H71/14; H01H71/16; H01H71/162; H01H73/00; H01H73/48; H01H73/50; H01H11/00; H01H2011/0075; H01H71/74; H01H2071/7472; H01H71/02; H01H71/0207; H01H71/0214; H01H71/06; H01H71/1072; H01H71/50; H01H71/52; H01H71/522; H01H71/524; H01H71/7427; H01H71/7436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A CIRCUIT BREAKER OF THE TYPE HAVING A CIRCUIT BREAKER OPERATING MECHANISM FOR OPERATING THE BREAKER BETWEEN CIRCUIT-CLOSED AND CIRCUIT-OPEN CONDITIONS AND AN OPERATING LEVER FOR ACTUATING SAID OPERATING MECHANISM, THE IMPROVEMENT COMPRISING AN UNSTABLE LATCH MEANS OPERABLE ON SAID OPERATING MECHANISM TO MAINTAIN THE SAME IN CIRCUIT-CLOSED CONDITION WHEN A FORCE IS APPLIED TO SAID LATCH MEANS, MEANS OPERATIVE TO PROVIDE SAID APPLIED FORCE TO SAID LATCH MEANS TO MAINTAIN SAID OPERATING MECHANISM IN CIRCUIT-CLOSED CONDITION, AND MEANS RESPONSIVE TO AN ABNORMAL ELECTRICAL CONDITION FOR DECREASING SAID FORCE, SAID LATCH MEANS BEING UNSTABLE AND THEREBY BEING AUTOMATICALLY OPERABLE TO RELEASE SAID OPERATING MECHANISM TO ALLOW TRIPPING OF THE LATTER TO CIR-
Claim 2
Dependent Claim
113 words
IN A CIRCUIT BREAKER OF THE TYPE HAVING A CIRCUIT BREAKER OPERATING MECHANISM FOR OPERATING THE BREAKER BETWEEN CIRCUIT-CLOSED AND CIRCUIT-OPEN CONDITIONS AND AN OPERATING LEVER FOR ACTUATING SAID OPERATING MECHANISM, THE IMPROVEMENT COMPRISING AN UNSTABLE LATCH MEANS OPERABLE ON SAID OPERATING MECHANISM TO MAINTAIN THE SAME IN CIRCUIT-CLOSED CONDITION WHEN A FORCE IS APPLIED TO SAID LATCH MEANS, MEANS OPERATIVE TO PROVIDE SAID APPLIED FORCE TO SAID LATCH MEANS TO MAINTAIN SAID OPERATING MECHANISM IN CIRCUIT-CLOSED CONDITION, AND MEANS RESPONSIVE TO AN ABNORMAL ELECTRICAL CONDITION FOR DECREASING SAID FORCE, SAID LATCH MEANS BEING UNSTABLE AND THEREBY BEING AUTOMATICALLY OPERABLE TO RELEASE SAID OPERATING MECHANISM TO ALLOW TRIPPING OF THE LATTER TO CIR-
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |