US3256399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum operated switch structures
Assignee: Robertshaw Controls Co
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Filing: 1961-11-17
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Granted: 1966-06-14
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Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Reed A Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
D; D06; D06F; D06F33/00; D06F33/04; D06F33/10; G; G05; G05B; G05B19/00; G05B19/43; G05B19/44; H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H35/00; H01H35/24; H01H35/26; H01H35/30; H01H35/34; H01H35/346; H01H43/00; H01H43/02; H01H43/04; H01H43/08; H01H9/00; H01H9/30; H01H2009/307
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN AN ELECTRICAL SWITCH CONSTRUCTION HAVING MEANS TO PROVIDE A FLOW OF ELECTRICAL CURRENT THERETHROUGH AND TO TERMINATE SUCH FLOW, THE COMBINATION: A RELATIVELY RIGID AND INSULATING RING STRUCTURE; A FLUID TUBE EXTENDING INTO SAID RING STRUCTURE; A FIRST ELECTRICAL CONDUCTING DISC ON ONE SIDE OF AND INSULATED BY SAID RING STRUCTURE WITH AN INNER ELECTRICAL CONTACTING SURFACE AND WITH AN INTEGRAL ELECTRICAL CONDUCTOR EXTENDING AWAY FROM SAID DISC; A SECOND ELECTRICAL CONDUCTING DISC ON THE OTHER SIDE OF AND INSULATED BY SAID RING STRUCTURE WITH ANOTHER INNER CONTACTING SURFACE AND WITH ANOTHER INTEGRAL ELECTRICAL CONDUCTOR EXTENDING AWAY FROM SAID SECOND DISC, AT LEAST ONE OF SAID DISCS BEING FLEXIBLE; AND AN ELASTIC ELECTRICAL INSULATING COATING DISPOSED AGAINST AND BONDING SAID RING, DISCS, FLUID TUBE, AND CONDUCTORS TOGETHER TO COMPLETELY COVER AND SEAL SAID RING, DISCS AND PORTIONS OF SAID FLUID TUBE AND ELECTRICAL CONDUCTORS.
Claim 2
Dependent Claim
145 words
IN AN ELECTRICAL SWITCH CONSTRUCTION HAVING MEANS TO PROVIDE A FLOW OF ELECTRICAL CURRENT THERETHROUGH AND TO TERMINATE SUCH FLOW, THE COMBINATION: A RELATIVELY RIGID AND INSULATING RING STRUCTURE; A FLUID TUBE EXTENDING INTO SAID RING STRUCTURE; A FIRST ELECTRICAL CONDUCTING DISC ON ONE SIDE OF AND INSULATED BY SAID RING STRUCTURE WITH AN INNER ELECTRICAL CONTACTING SURFACE AND WITH AN INTEGRAL ELECTRICAL CONDUCTOR EXTENDING AWAY FROM SAID DISC; A SECOND ELECTRICAL CONDUCTING DISC ON THE OTHER SIDE OF AND INSULATED BY SAID RING STRUCTURE WITH ANOTHER INNER CONTACTING SURFACE AND WITH ANOTHER INTEGRAL ELECTRICAL CONDUCTOR EXTENDING AWAY FROM SAID SECOND DISC, AT LEAST ONE OF SAID DISCS BEING FLEXIBLE; AND AN ELASTIC ELECTRICAL INSULATING COATING DISPOSED AGAINST AND BONDING SAID RING, DISCS, FLUID TUBE, AND CONDUCTORS TOGETHER TO COMPLETELY COVER AND SEAL SAID RING, DISCS AND PORTIONS OF SAID FLUID TUBE AND ELECTRICAL CONDUCTORS.
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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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |