US2753544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic detector
Assignee: Sunoco Inc
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Filing: 1953-10-27
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Granted: 1956-07-03
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Expires: 1973-10-27
Abstract
No abstract record available.
Inventors
- 👤 William H Cox
- 👤 John W Millington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SEISMIC DETECTOR COMPRISING RELATIVELY MOVABLE ELEMENTS PROVIDING AN OUTPUT SIGNAL DUE TO THEIR RELATIVE MOTION, MEANS FOR RESILIENTLY MOUNTING ONE OF SAID ELEMENTS ON THE OTHER ELEMENT, SAID MOUNTING MEANS INCLUDING SPRING MEANS HAVING A POSITIVE SPRING CONSTANT AND SPRING MEANS HAVING A NEGATIVE SPRING CONSTANT, THE LAST MENTIONED MEANS COMPRISING A PAIR OF SPRING ELEMENTS EACH GIVING RISE TO A RATIONAL FORCE UPON SPRING DEFLECTION AND BEING MOUNTED IN OPPOSED ROTATIONALLY PRELOADED RELATION, MEANS FOR ADJUSTING THE TENSION ON THE POSITIVE SPRING CONSTANT SPRING, AND MEANS FOR ADJUSTING THE ROTATIONAL PRELOADING ON THE OPPOSED ROTATIONALLY PRELOADED SPRING ELEMENTS.
Claim 2
Dependent Claim
100 words
A SEISMIC DETECTOR COMPRISING RELATIVELY MOVABLE ELEMENTS PROVIDING AN OUTPUT SIGNAL DUE TO THEIR RELATIVE MOTION, MEANS FOR RESILIENTLY MOUNTING ONE OF SAID ELEMENTS ON THE OTHER ELEMENT, SAID MOUNTING MEANS INCLUDING SPRING MEANS HAVING A POSITIVE SPRING CONSTANT AND SPRING MEANS HAVING A NEGATIVE SPRING CONSTANT, THE LAST MENTIONED MEANS COMPRISING A PAIR OF SPRING ELEMENTS EACH GIVING RISE TO A RATIONAL FORCE UPON SPRING DEFLECTION AND BEING MOUNTED IN OPPOSED ROTATIONALLY PRELOADED RELATION, MEANS FOR ADJUSTING THE TENSION ON THE POSITIVE SPRING CONSTANT SPRING, AND MEANS FOR ADJUSTING THE ROTATIONAL PRELOADING ON THE OPPOSED ROTATIONALLY PRELOADED SPRING ELEMENTS.
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) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |