US3336834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining direction and magnitude of residual stresses in structures
Assignee: Individual
•
Filing: 1963-12-13
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Granted: 1967-08-22
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Expires: 1983-12-13
Abstract
No abstract record available.
Inventors
- 👤 William L Bingham
- 👤 Erwin W Kammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:22
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/16; G01B11/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A METHOD OF DETECTING THE PRESENCE, DIRECTION, MAGNITUDE AND TYPE OF LOCKED-IN STRESS IN A STRUCTURE WHICH COMPRISES; (A) CLEANING A SURFACE OF SAID STRUCTURE TO BOND A SHEET OF RESIN, THERETO, (B) BONDING SAID SHEET OF RESIN ONTO SAID CLEANED SURFACE, (C) DRILLING A HOLE THROUGH SAID SHEET OF RESIN BONDED ONTO SAID SURFACE AND INTO SAID STRUCTURE A SHORT DISTANCE, (D) DIRECTING A BEAM OF PARALLEL LIGHT THROUGH A POLARIZER AND THROUGH SAID SHEET OF RESIN AT AN ANGLE THERETO IN THE VICINITY OF SAID HOLE DRILLED INTO THE STRUCTURE THROUGH SAID SHEET OF RESIN, (E) PASSING LIGHT REFLECTED BACK THROUGH SAID SHEET OF RESIN THROUGH AN ANALYZER, (F) AND DETECTING THE LIGHT AFTER PASSING THROUGH SAID ANALYZER TO INDICATE STRESS PATTERN SET-UP WITHIN SAID SHEET OF RESIN, (G) HEATING SAID SHEET OF RESIN AND SAID STRUCTURE WITH A HEAT SOURCE THEREBY EXPANDING SAID SHEET OF RESIN RELATIVE TO SAID STRUCTURE, (H) AND OBSERVING THE STRESS PATTERN IN SAID SHEET OF RESIN WHEREBY LESS STRESS LINES APPEARING IN SAID SHEET OF RESIN INDICATES TENSION IN SAID STRUCTURE AND MORE STRESS LINES APPEARING IN SAID SHEET OF RESIN INDICATES THAT THE STRUCTURE IS IN COMPRESSION.
Claim 2
Independent Claim
196 words
A METHOD OF DETECTING THE PRESENCE, DIRECTION, MAGNITUDE AND TYPE OF LOCKED-IN STRESS IN A STRUCTURE WHICH COMPRISES; (A) CLEANING A SURFACE OF SAID STRUCTURE TO BOND A SHEET OF RESIN, THERETO, (B) BONDING SAID SHEET OF RESIN ONTO SAID CLEANED SURFACE, (C) DRILLING A HOLE THROUGH SAID SHEET OF RESIN BONDED ONTO SAID SURFACE AND INTO SAID STRUCTURE A SHORT DISTANCE, (D) DIRECTING A BEAM OF PARALLEL LIGHT THROUGH A POLARIZER AND THROUGH SAID SHEET OF RESIN AT AN ANGLE THERETO IN THE VICINITY OF SAID HOLE DRILLED INTO THE STRUCTURE THROUGH SAID SHEET OF RESIN, (E) PASSING LIGHT REFLECTED BACK THROUGH SAID SHEET OF RESIN THROUGH AN ANALYZER, (F) AND DETECTING THE LIGHT AFTER PASSING THROUGH SAID ANALYZER TO INDICATE STRESS PATTERN SET-UP WITHIN SAID SHEET OF RESIN, (G) HEATING SAID SHEET OF RESIN AND SAID STRUCTURE WITH A HEAT SOURCE THEREBY EXPANDING SAID SHEET OF RESIN RELATIVE TO SAID STRUCTURE, (H) AND OBSERVING THE STRESS PATTERN IN SAID SHEET OF RESIN WHEREBY LESS STRESS LINES APPEARING IN SAID SHEET OF RESIN INDICATES TENSION IN SAID STRUCTURE AND MORE STRESS LINES APPEARING IN SAID SHEET OF RESIN INDICATES THAT THE STRUCTURE IS IN COMPRESSION.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |