Patent US3290928A successfully refreshed from Google Patents.
US3290928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated strain gage and circuit
Assignee: Boeing Co
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Filing: 1964-06-10
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Granted: 1966-12-13
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Truman M Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:46
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2268; G01L1/2281; G01L1/225; G01L1/2262; G01L1/2287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A TEMPERATURE COMPENSATED STRAIN GAGE CIRCUIT FOR MEASURING STRAIN IN A BODY COMPRISING: (A) A PLURALITY OF STRAIN GAGES SECURED TO THE BODY AT SPACED LOCTIONS AND ELECTRICALLY COUPLED IN PARALLEL TO ONE ANOTHER; (B) EACH OF SAID STRAIN GAGES HAVING A TEMPERATURE SENSITIVE ELECTRICALLY CONDUCTIVE ELEMENT SECURED AND ARRANGED IN CLOSE PROXIMITY TO SAID GAGE; (C) SAID TEMPERATURE SENSITIVE ELECTRICALLY CONDUCTIVE ELEMENTS COUPLED TO FORM A TEMPERATURE GRADIENT RESPONSIVE BRIDGE CIRCUIT WITH SAID ELEMENTS COMPRISING ARMS OF SAID BRIDGE CIRCUIT; (D) MEANS COUPLED TO SAID STRAIN GAGES FOR GENERATING AN ELECTRICAL SIGNAL IN EACH OF SAID GAGES IN RESPONSE TO THE STRAIN; AND (E) CIRCUIT MEANS PARALLEL COUPLING SAID STRAIN GAGES AND SAID TEMPERATURE GRADIENT RESPONSIVE BRIDGE CIRCUIT, WHEREBY TEMPERATURE GRADIENT STRAIN INDUCED ELECTRICAL SIGNALS ARE EFFECTIVELY CANCELLED.
Claim 2
Dependent Claim
129 words
A TEMPERATURE COMPENSATED STRAIN GAGE CIRCUIT FOR MEASURING STRAIN IN A BODY COMPRISING: (A) A PLURALITY OF STRAIN GAGES SECURED TO THE BODY AT SPACED LOCTIONS AND ELECTRICALLY COUPLED IN PARALLEL TO ONE ANOTHER; (B) EACH OF SAID STRAIN GAGES HAVING A TEMPERATURE SENSITIVE ELECTRICALLY CONDUCTIVE ELEMENT SECURED AND ARRANGED IN CLOSE PROXIMITY TO SAID GAGE; (C) SAID TEMPERATURE SENSITIVE ELECTRICALLY CONDUCTIVE ELEMENTS COUPLED TO FORM A TEMPERATURE GRADIENT RESPONSIVE BRIDGE CIRCUIT WITH SAID ELEMENTS COMPRISING ARMS OF SAID BRIDGE CIRCUIT; (D) MEANS COUPLED TO SAID STRAIN GAGES FOR GENERATING AN ELECTRICAL SIGNAL IN EACH OF SAID GAGES IN RESPONSE TO THE STRAIN; AND (E) CIRCUIT MEANS PARALLEL COUPLING SAID STRAIN GAGES AND SAID TEMPERATURE GRADIENT RESPONSIVE BRIDGE CIRCUIT, WHEREBY TEMPERATURE GRADIENT STRAIN INDUCED ELECTRICAL SIGNALS ARE EFFECTIVELY CANCELLED.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |