US3262309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain gage
Assignee: Individual
•
Filing: 1964-04-21
•
Granted: 1966-07-26
•
Expires: 1984-04-21
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:25
CPC Classifications
E; E02; E02D; E02D1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A STRAIN GAGE FOR MEASURING THE STRAIN IN A SUBSTANCE COMPRISING: A FIRST DRIVING COIL FOR EMITTING ELECTROMAGNETIC FLUX EMBEDDED WITHIN THE SUBSTANCE; A FIRST ELECTROMAGNETIC FLUX SENSING COIL EMBEDDED WITHIN THE SUBSTANCE, MAGNETICALLY COUPLED IN SUBSTANTIALLY AXIAL SPACED-APART RELATIONSHIP WITH SAID FIRST DRIVING COIL; A SECOND DRIVING COIL, EXTERNAL TO SAID SUBSTANCE, FOR EMITTING ELECTROMAGNETIC FLUX; A SECOND ELECTROMAGNETIC FLUX SENSING COIL, EXTERNAL TO SAID SUBSTANCE, MAGNETICALLY COUPLED IN SUBSTANTIALLY AXIAL SPACED-APART RELATIONSHIP WITH SAID SECOND DRIVING COIL; A SOURCE OF ALTERNATING CURRENT CONNECTED TO SAID FIRST AND SAID SECOND DRIVING COIL; CONNECTING MEANS CONNECTING IN ELECTRICAL OPPOSITION SAID FIRST AND SAID SECOND SENSING COILS; DEMODULATION MEANS COOPERATING WITH SAID SOURCE OF ALTERNATING CURRENT AND SAID CONNECTING MEANS PROVIDING AN OUTPUT WHICH IS INDICATIVE IN MAGNITUDE AND POLARITY OF SPACING DIFFERENTIAL BETWEEN, SAID
Claim 2
Dependent Claim
134 words
A STRAIN GAGE FOR MEASURING THE STRAIN IN A SUBSTANCE COMPRISING: A FIRST DRIVING COIL FOR EMITTING ELECTROMAGNETIC FLUX EMBEDDED WITHIN THE SUBSTANCE; A FIRST ELECTROMAGNETIC FLUX SENSING COIL EMBEDDED WITHIN THE SUBSTANCE, MAGNETICALLY COUPLED IN SUBSTANTIALLY AXIAL SPACED-APART RELATIONSHIP WITH SAID FIRST DRIVING COIL; A SECOND DRIVING COIL, EXTERNAL TO SAID SUBSTANCE, FOR EMITTING ELECTROMAGNETIC FLUX; A SECOND ELECTROMAGNETIC FLUX SENSING COIL, EXTERNAL TO SAID SUBSTANCE, MAGNETICALLY COUPLED IN SUBSTANTIALLY AXIAL SPACED-APART RELATIONSHIP WITH SAID SECOND DRIVING COIL; A SOURCE OF ALTERNATING CURRENT CONNECTED TO SAID FIRST AND SAID SECOND DRIVING COIL; CONNECTING MEANS CONNECTING IN ELECTRICAL OPPOSITION SAID FIRST AND SAID SECOND SENSING COILS; DEMODULATION MEANS COOPERATING WITH SAID SOURCE OF ALTERNATING CURRENT AND SAID CONNECTING MEANS PROVIDING AN OUTPUT WHICH IS INDICATIVE IN MAGNITUDE AND POLARITY OF SPACING DIFFERENTIAL BETWEEN, SAID
References Cited (Backward Citations)
US1708333A
Cited
US2532231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |