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US4899356A
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Method of radiographic inspection of wooden members
Assignee: GOVERNMENT OF UNITE STATES AERONAUTJICS AND SPACE ADMINISTRATION, Administrator of
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Filing: 1987-11-25
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Granted: 1990-02-06
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Expires: 2007-11-25
Abstract
Abstract The invention is a method of radiographic inspection of a wooden specimen 11 for internal defects which includes the steps of introducing a radiopaque penetrant into any internal defects in said specimen 11 through surface openings therein; passing a beam of radiation through a portion of the specimen to be inspected; and making a radiographic film image of the radiation passing through said specimen, the radiopaque penetrant in said specimen absorbing a portion of said radiation passing therethrough, thereby enhancing the resulting image of said internal defects in said specimen 11.
Inventors
- 👤 Maggie L. Berry
- 👤 Robert F. Berry, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:54
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/18; G01N23/083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A non-contaminating method of radiographic inspection of a wooden specimen comprising the steps of: introducing a non-contaminating, highly evaporative radiopaque penetrant formed of a fluorocarbon cleaning solvent into internal defects in said wooden specimen to be inspected through a surface opening therein; subjecting the wooden specimen to a beam of radiation sufficient to pass through said wooden specimen; and making a radiographic film image of said beam of radiation passing through said wooden specimen, said non-contaminating radiopaque penetrant in said internal defects within said specimen absorbing a portion of said beam of radiation passing therethrough, thereby enhancing the resulting film image of said internal defects without contaminating said wooden specimen.
Claim 2
Dependent Claim
110 words
A non-contaminating method of radiographic inspection of a wooden specimen comprising the steps of: introducing a non-contaminating, highly evaporative radiopaque penetrant formed of a fluorocarbon cleaning solvent into internal defects in said wooden specimen to be inspected through a surface opening therein; subjecting the wooden specimen to a beam of radiation sufficient to pass through said wooden specimen; and making a radiographic film image of said beam of radiation passing through said wooden specimen, said non-contaminating radiopaque penetrant in said internal defects within said specimen absorbing a portion of said beam of radiation passing therethrough, thereby enhancing the resulting film image of said internal defects without contaminating said wooden specimen.
Claim 3
Dependent Claim
49 words
The method of claim 1 including the steps of making a radiographic film image of said wooden specimen "before" introducing said radiopaque penetrant into said internal defects; and comparing said "before" radiographic film image with said radiographic film image made "after" introducing said radiopaque penetrant into said internal defects.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said wooden specimen is quarter-sawn and said beam of radiation passes through said wooden specimen tangentially to the grain of said wooden specimens.
Claim 5
Dependent Claim
29 words
The method of claim 2 wherein said wooden specimen is quarter-sawn and said beam of radiation passes through said wooden specimen tangentially to the grain of said wooden specimen.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |