US3229567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split image viewer for photoelastic gauges
Assignee: ThyssenKrupp Budd Co
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Filing: 1961-12-28
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Granted: 1966-01-18
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Zandman Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/16; G01B11/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A SPLIT FIELD COLOR COMPARISON PHOTOELASTIC STRAIN GAUGE SYSTEM FOR DETERMINATION OF STRAIN MAGNITUDES AT THE SURFACE OF A WORKPIECE, SAID SYSTEM COMPRISING AN ELONGATED PHOTOELASTIC TESTPIECE BONDED AT ITS ENDS TO THE WORKPIECE AND EXHIBITING A LONGITUDINAL, LINEAR, BIAS-BIREFRINGENCE GRADIENT OF A GIVEN SLOPE, REFLECTING MEANS INTERPOSED BETWEEN SAID TESTPIECE AND THE WORKPIECE AND A VIEWER SLIDABLY MOUNTED OVER SAID TESTPIECE FOR LONGITUDINAL TRANSLATION THEREALONG, LONGITUDINAL SCALE INDICA FORMED ON SAID TESTPIECE AND A COOPERATING INDEX FORMED ON SAID VIEWER FOR READ-OUT OF RELATIVE TRANSLATION OF SAID VIEWER AND SAID TESTPIECE, SAID VIEWER BEING A LAMINATE INCLUDING A POLARIZER-ANALYZER STRATUM OF POLARIZING SHEET MATERIAL, A COMPENSATOR STRATUM EXHIBITING A LINEAR BIAS-BIREFRINGENCE GRADIENT OF THE SAME SLOPE BUT
Claim 2
Dependent Claim
118 words
A SPLIT FIELD COLOR COMPARISON PHOTOELASTIC STRAIN GAUGE SYSTEM FOR DETERMINATION OF STRAIN MAGNITUDES AT THE SURFACE OF A WORKPIECE, SAID SYSTEM COMPRISING AN ELONGATED PHOTOELASTIC TESTPIECE BONDED AT ITS ENDS TO THE WORKPIECE AND EXHIBITING A LONGITUDINAL, LINEAR, BIAS-BIREFRINGENCE GRADIENT OF A GIVEN SLOPE, REFLECTING MEANS INTERPOSED BETWEEN SAID TESTPIECE AND THE WORKPIECE AND A VIEWER SLIDABLY MOUNTED OVER SAID TESTPIECE FOR LONGITUDINAL TRANSLATION THEREALONG, LONGITUDINAL SCALE INDICA FORMED ON SAID TESTPIECE AND A COOPERATING INDEX FORMED ON SAID VIEWER FOR READ-OUT OF RELATIVE TRANSLATION OF SAID VIEWER AND SAID TESTPIECE, SAID VIEWER BEING A LAMINATE INCLUDING A POLARIZER-ANALYZER STRATUM OF POLARIZING SHEET MATERIAL, A COMPENSATOR STRATUM EXHIBITING A LINEAR BIAS-BIREFRINGENCE GRADIENT OF THE SAME SLOPE BUT
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |