US3319033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact spring group for electrical switching apparatus
Assignee: Individual
•
Filing: 1965-04-26
•
Granted: 1967-05-09
•
Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Per Harry Elias Claesson
- 👤 Karl Evert Jarnbrink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:45
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56; H01H1/00; H01H1/12; H01H1/14; H01H1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A CONTACT SPRING GROUP FOR RELAYS, CHANGE-OVER SWITCHES AND THE LIKE, A NUMBER OF MOVABLE CONTACT SPRINGS OF THE LEAF SPRING TYPE, AND A NUMBER OF FIXED CONTACT SPRINGS OF THE LEAF SPRING TYPE, EACH OF SAID CONTACT SPRINGS HAVING A SOLID REAR PORTION AND A SHANKED FRONT PORTION, THE REAR PART OF SAID REAR PORTION BEING FASTENED IN A SUPPORTING BRACKET, THE FRONT PART OF SAID REAR PORTION BEING MOVABLE IN A PLANE PERPENDICULAR TO THE PLANE OF THE SPRING, EACH SHANK OF SAID SHANKED PORTION BEING TAPERED AND HAVING A WIDTH WHICH IS LESS THAN HALF THE WIDTH OF THE SOLID PORTION AND WHICH DECREASES ALONG THE GREATEST PART OF THE LENGTH OF THE SHANK FROM THE SOLID PORTION TO THE FREE END OF THE SHANK, EACH SHANK HAVING A CONTACT SURFACE AT ITS FREE END, SAID CONTACT SURFACE BEING LOCATED OPPOSITE TO A CORRESPONDING
Claim 2
Dependent Claim
148 words
IN A CONTACT SPRING GROUP FOR RELAYS, CHANGE-OVER SWITCHES AND THE LIKE, A NUMBER OF MOVABLE CONTACT SPRINGS OF THE LEAF SPRING TYPE, AND A NUMBER OF FIXED CONTACT SPRINGS OF THE LEAF SPRING TYPE, EACH OF SAID CONTACT SPRINGS HAVING A SOLID REAR PORTION AND A SHANKED FRONT PORTION, THE REAR PART OF SAID REAR PORTION BEING FASTENED IN A SUPPORTING BRACKET, THE FRONT PART OF SAID REAR PORTION BEING MOVABLE IN A PLANE PERPENDICULAR TO THE PLANE OF THE SPRING, EACH SHANK OF SAID SHANKED PORTION BEING TAPERED AND HAVING A WIDTH WHICH IS LESS THAN HALF THE WIDTH OF THE SOLID PORTION AND WHICH DECREASES ALONG THE GREATEST PART OF THE LENGTH OF THE SHANK FROM THE SOLID PORTION TO THE FREE END OF THE SHANK, EACH SHANK HAVING A CONTACT SURFACE AT ITS FREE END, SAID CONTACT SURFACE BEING LOCATED OPPOSITE TO A CORRESPONDING
References Cited (Backward Citations)
US2178151A
Cited
US2282687A
Cited
FR892479A
Cited
FR1150259A
Cited
GB846488A
Cited
US3018353A
Cited
US3182159A
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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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |