Patent US5473715A successfully refreshed from Google Patents.
Patent US3139494A successfully refreshed from Google Patents.
US3139494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker closing mechanism
Assignee: ABB Inc USA
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Filing: 1959-12-11
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Granted: 1964-06-30
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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 16:07
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.
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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) | 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 |