US3139494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker closing mechanism
Assignee: ABB Inc USA
•
Filing: 1959-12-11
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Granted: 1964-06-30
•
Expires: 1979-12-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur S Caswell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:23
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H3/26; H01H2003/266; H01H3/32; H01H3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A CIRCUIT BREAKER COMPRISING A PAIR OF COOPERATING CONTACTS AND A MECHANISM OPERATIVELY CONNECTED TO SAID COOPERATING CONTACTS FOR OPERATING SAID CONTACTS INTO ENGAGEMENT; SAID MECHANISM INCLUDING A COLLAPSIBLE LINKAGE, A FIRST LATCH MEANS ENGAGING AN INTERMEDIATE PORTION OF SAID LINKAGE FOR MAINTAINING SAID LINKAGE IN AN EXTENDED POSITION, AND A MOTOR DRIVEN CAM MEANS OPERABLE UPON AN END OF SAID LINKAGE TO EFFECT OPERATION OF SAID CONTACTS INTO ENGAGEMENT; SAID CAM MEANS INTEGRALLY INCLUDING A FORMATION CONSTRUCTED AND POSITIONED TO PROVIDE A SECOND LATCH MEANS ABUTTING SAID END OF SAID COLLAPSIBLE LINKAGE FOR MAINTAINING SAID LINKAGE WHEN EXTENDED IN A POSITION SUCH THAT SAID CONTACTS ARE ENGAGED.
Claim 2
Dependent Claim
108 words
A CIRCUIT BREAKER COMPRISING A PAIR OF COOPERATING CONTACTS AND A MECHANISM OPERATIVELY CONNECTED TO SAID COOPERATING CONTACTS FOR OPERATING SAID CONTACTS INTO ENGAGEMENT; SAID MECHANISM INCLUDING A COLLAPSIBLE LINKAGE, A FIRST LATCH MEANS ENGAGING AN INTERMEDIATE PORTION OF SAID LINKAGE FOR MAINTAINING SAID LINKAGE IN AN EXTENDED POSITION, AND A MOTOR DRIVEN CAM MEANS OPERABLE UPON AN END OF SAID LINKAGE TO EFFECT OPERATION OF SAID CONTACTS INTO ENGAGEMENT; SAID CAM MEANS INTEGRALLY INCLUDING A FORMATION CONSTRUCTED AND POSITIONED TO PROVIDE A SECOND LATCH MEANS ABUTTING SAID END OF SAID COLLAPSIBLE LINKAGE FOR MAINTAINING SAID LINKAGE WHEN EXTENDED IN A POSITION SUCH THAT SAID CONTACTS ARE ENGAGED.
References Cited (Backward Citations)
US1643444A
Cited
US1902396A
Cited
US2068402A
Cited
US2521194A
Cited
US2697149A
Cited
US2698916A
Cited
US2698888A
Cited
US2640122A
Cited
US2821600A
Cited
US2891122A
Cited
US2892057A
Cited
US2836769A
Cited
US2905787A
Cited
US2959655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |