US3074271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelastic strain gauges
Assignee: ThyssenKrupp Budd Co
•
Filing: 1960-02-25
•
Granted: 1963-01-22
•
Expires: 1980-02-25
Abstract
No abstract record available.
Inventors
- 👤 Redner Salomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:56
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/16; G01B11/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PHOTOELASTIC STRAIN GAUGE COMBINATION COMPRISING FIRST AND SECOND WORKPIECE ATTACHMENT MEANS SPACED APART TO DEFINE A GAUGE LENGTH, A FIRST OPTICALLY STRAIN SENSITIVE ELEMENT OF FORCE-BIREFRINGENT MATERIAL HAVING A RELATIVELY LOW MODULUS OF ELASTICITY, AND A SECOND LOAD TRANSFER ELEMENT OF A MATERIAL HAVING A RELATIVELY HIGH MODULUS OF ELASTICITY, SAID FIRST AND SECOND ELEMENTS BEING MECHANICALLY CONNECTED IN SERIES BETWEEN THE ATTACHMENT MEANS, WHEREBY UNIT STRAINS PRODUCED WITHIN THE FORCED-BIREFRINGENT MATERIAL ELEMENT ARE AMPLIFIED WITH RESPECT TO EXTERNALLY IMPOSED GAUGE LENGTH DEFORMATIONS.
Claim 2
Dependent Claim
84 words
A PHOTOELASTIC STRAIN GAUGE COMBINATION COMPRISING FIRST AND SECOND WORKPIECE ATTACHMENT MEANS SPACED APART TO DEFINE A GAUGE LENGTH, A FIRST OPTICALLY STRAIN SENSITIVE ELEMENT OF FORCE-BIREFRINGENT MATERIAL HAVING A RELATIVELY LOW MODULUS OF ELASTICITY, AND A SECOND LOAD TRANSFER ELEMENT OF A MATERIAL HAVING A RELATIVELY HIGH MODULUS OF ELASTICITY, SAID FIRST AND SECOND ELEMENTS BEING MECHANICALLY CONNECTED IN SERIES BETWEEN THE ATTACHMENT MEANS, WHEREBY UNIT STRAINS PRODUCED WITHIN THE FORCED-BIREFRINGENT MATERIAL ELEMENT ARE AMPLIFIED WITH RESPECT TO EXTERNALLY IMPOSED GAUGE LENGTH DEFORMATIONS.
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |