US3272950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant-load spring-loaded electrical switch
Assignee: Individual
•
Filing: 1964-09-28
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Granted: 1966-09-13
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Greenhut Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:33
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/06; H01H35/10; H01H1/00; H01H1/12; H01H1/14; H01H1/18; H01H3/00; H01H3/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN AN ELECTRICAL SWITCH, THE COMBINATION OF CONTACT ELEMENTS MOUNTED FOR RELATIVE MOVEMENT INTO AND OUT OF CIRCUIT-CLOSING RELATIONSHIP, FIRST SPRING MEANS BEARING UPON AND URGING ONE OF SAID CONTACT ELEMENTS TOWARD CIRCUIT-CLOSING POSITION, SECOND SPRING MEANS BEARING UPON AND URGING SAID ONE CONTACT ELEMENT TOWARD CIRCUIT-OPENING POSITION IN OPPOSITION TO SAID FIRST SPRING MEANS, ONE OF SAID SPRING MEANS EXERTING A FORCE UPON SAID ONE CONTACT ELEMENT LESS THAN ONE-HALF THE FORCE EXERTED BY THE OTHER OF SAID SPRING MEANS, AND MOVABLE SWITCH-OPERATING MEANS OPERATIVELY INTERPOSED BETWEEN SAID FIRST AND SECOND SPRING MEANS FOR SELECTIVELY DISENGAGING SAID SPRING MEANS FROM OPPOSITION TO EACH OTHER.
Claim 2
Dependent Claim
105 words
IN AN ELECTRICAL SWITCH, THE COMBINATION OF CONTACT ELEMENTS MOUNTED FOR RELATIVE MOVEMENT INTO AND OUT OF CIRCUIT-CLOSING RELATIONSHIP, FIRST SPRING MEANS BEARING UPON AND URGING ONE OF SAID CONTACT ELEMENTS TOWARD CIRCUIT-CLOSING POSITION, SECOND SPRING MEANS BEARING UPON AND URGING SAID ONE CONTACT ELEMENT TOWARD CIRCUIT-OPENING POSITION IN OPPOSITION TO SAID FIRST SPRING MEANS, ONE OF SAID SPRING MEANS EXERTING A FORCE UPON SAID ONE CONTACT ELEMENT LESS THAN ONE-HALF THE FORCE EXERTED BY THE OTHER OF SAID SPRING MEANS, AND MOVABLE SWITCH-OPERATING MEANS OPERATIVELY INTERPOSED BETWEEN SAID FIRST AND SECOND SPRING MEANS FOR SELECTIVELY DISENGAGING SAID SPRING MEANS FROM OPPOSITION TO EACH OTHER.
References Cited (Backward Citations)
US2755353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |