Patent US3448630A successfully refreshed from Google Patents.
Patent US3275770A successfully refreshed from Google Patents.
US3275770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosion pressure responsive switch
Assignee: Sinclair Research Inc
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Filing: 1965-02-26
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Granted: 1966-09-27
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Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 Lauren G Kilmer
- 👤 Richard K Shearman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:13
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H29/00; H01H29/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A SWITCH COMPRISING A HOLLOW BODY, PLATE MEANS SEALING THE TOP OF THE HOLLOW OF SAID BODY, THE HOLLOW OF SAID BODY HAVING A SIDEWALL, A SPLIT CONE ELECTRODE MEANS INCLUDING TWO ELECTRICALLY-CONDUCTIVE ELEMENTS SUPPORTED IN THE HOLLOW OF SAID BODY BENEATH SAID PLATE, SAID ELEMENTS BEING SPACED A SMALL DISTANCE APART, MEANS FOR SEALING THE BOTTOM OF SAID HOLLOW INCLUDING A PISTON ARRANGED AT THE BOTTOM OF SAID HOLLOW BODY, SAID PISTON HAVING LIMITED AXIAL MOVEMENT IN THE HOLLOW OF SAID BODY, A SMALL BODY OF MERCURY NORMALLY RESTING ON SAID PISTON MEANS BENEATH SAID PLATE, AND DEFLECTOR MEANS ADJACENT SAID ELECTRODE MEANS FOR DEFLECTING MERCURY WHICH STRIKES THE SAME SUBSTANTIALLY AXIALLY OF SAID BODY IN THE DIRECTION TOWARD SAID ELECTRODE MEANS, WHEREBY WHEN A SUDDEN FORCE IS APPLIED AT THE BOTTOM OF SAID HOLLOW BODY SAID PISTON MEANS IS SUDDENLY RAISED TO THROW SAID MERCURY UPWARD WHERE IT IS DEFLECTED TO PASS BETWEEN SAID TWO ELEMENTS AND MOMENTARILY COMPLETE A CIRCUIT THROUGH SAID ELECTRODE MEANS.
Claim 2
Dependent Claim
167 words
A SWITCH COMPRISING A HOLLOW BODY, PLATE MEANS SEALING THE TOP OF THE HOLLOW OF SAID BODY, THE HOLLOW OF SAID BODY HAVING A SIDEWALL, A SPLIT CONE ELECTRODE MEANS INCLUDING TWO ELECTRICALLY-CONDUCTIVE ELEMENTS SUPPORTED IN THE HOLLOW OF SAID BODY BENEATH SAID PLATE, SAID ELEMENTS BEING SPACED A SMALL DISTANCE APART, MEANS FOR SEALING THE BOTTOM OF SAID HOLLOW INCLUDING A PISTON ARRANGED AT THE BOTTOM OF SAID HOLLOW BODY, SAID PISTON HAVING LIMITED AXIAL MOVEMENT IN THE HOLLOW OF SAID BODY, A SMALL BODY OF MERCURY NORMALLY RESTING ON SAID PISTON MEANS BENEATH SAID PLATE, AND DEFLECTOR MEANS ADJACENT SAID ELECTRODE MEANS FOR DEFLECTING MERCURY WHICH STRIKES THE SAME SUBSTANTIALLY AXIALLY OF SAID BODY IN THE DIRECTION TOWARD SAID ELECTRODE MEANS, WHEREBY WHEN A SUDDEN FORCE IS APPLIED AT THE BOTTOM OF SAID HOLLOW BODY SAID PISTON MEANS IS SUDDENLY RAISED TO THROW SAID MERCURY UPWARD WHERE IT IS DEFLECTED TO PASS BETWEEN SAID TWO ELEMENTS AND MOMENTARILY COMPLETE A CIRCUIT THROUGH SAID ELECTRODE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |