US3303450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical dual-grid strain gaging
Assignee: BLH Electronics Inc
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Filing: 1964-10-06
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Granted: 1967-02-07
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Expires: 1984-10-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Anthony H Brackett
- 👤 Lawrence J Frith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:59
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2287; F; F02; F02D; F02D41/00; F02D41/30; F02M; F02M1/00; F02M23/00; F02M23/04; F02M23/06; F02M29/00; F02M29/04; G01L1/2206; G01L1/2218; G01L1/225; G01L1/2262; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
A SYMMETRICAL DUAL-GRID ELECTRICAL STRAIN GAGE UNIT COMPRISING A FIRST GRID OF STRAIN-SENSITIVE CONDUCTIVE MATERIAL HAVING A SUBSTANTIALLY SERPENTINE CONFIGURATION WHEREIN THE CONVOLUTIONS THEREOF HAVE HIGHLY ELONGATED SPACED CONDUCTOR PORTIONS WHICH ARE SUBSTANTIALLY COPLANAR AND WHEREIN THE CONNECTIONS BETWEEN SAID CONDUCTOR PORTIONS HAVE RESISTANCE LOW IN RELATION TO THE RESISTANCE OF SAID CONDUCTOR PORTIONS, AT LEAST CERTAIN OF THE ADJACENT CONVOLUTIONS OF SAID FIRST GRID HAVING SPACES THEREBETWEEN TO ACCOMMODATE CONVOLUTIONS OF A SECOND GRID THEREBETWEEN IN COPLANAR AND SPACED RELATIONSHIP THEREWITH, A SECOND GRID OF CONFIGURATION COMPLEMENTARY TO THAT OF SAID FIRST GRID AND OF CONDUCTIVE MATERIAL HAVING A SUBSTANTIALLY SERPENTINE CONFIGURATION WHEREIN THE CONVOLUTIONS THEREOF HAVE HIGHLY ELONGATED SPACED CONDUCTOR PORTIONS WHICH ARE SUBSTANTIALLY COPLANAR WITH SAID CONDUCTOR PORTIONS OF SAID FIRST GRID AND WHICH ARE SPACED TO INTERLEAVE WITH SAID CONDUCTOR PORTIONS OF SAID FIRST GRID IN SAID SPACES AND WHEREIN THE CONNECTIONS BE-
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |