US3645129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for analyzing the joinder between a pair of abutting members
Assignee: G C OPTRONICS Inc
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Filing: 1968-03-18
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Granted: 1972-02-29
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Expires: 1988-03-18
Abstract
Abstract A transducer induces vibrations into a member including at least a pair of members joined to one another along a common surface. An exposed section of the two members, which may or may not include one line of their joinder, is illuminated with a source of coherent light while it is being vibrated and a photographic plate is exposed to both the reflected light and the direct coherent light. The plate is developed to provide a hologram which is then properly illuminated to recreate a visual image of the surface section. The visual image will contain fringe lines and/or shaded areas as a result of interference between light waves reflected from the member at the high and low points of its vibration. Anomalies in these lines and areas will reveal discontinuities in the joinder between the two members which affect the pattern of vibration of the surface section.
Inventors
- 👤 Ralph M Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/06; G01N29/0654; G01N29/0663; G01H; G01H9/00; G03; G03H; G03H1/00; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
The method of analyzing the bond between a pair of members which abut one another at a joinder, comprising; inducing vibrations in the members; forming a hologram of a section of a surface of the members while they are undergoing vibration; and illuminating the hologram and viewing a reconstructed optical image of said surface section of the members, and identifying nonuniform fringe lines, such image displaying families of fringe lines which are generally uniform in areas associated with points of the joinder where the members are bonded to one another and are nonuniform in areas associated with other points of the joinder.
Claim 2
Independent Claim
102 words
The method of analyzing the bond between a pair of members which abut one another at a joinder, comprising; inducing vibrations in the members; forming a hologram of a section of a surface of the members while they are undergoing vibration; and illuminating the hologram and viewing a reconstructed optical image of said surface section of the members, and identifying nonuniform fringe lines, such image displaying families of fringe lines which are generally uniform in areas associated with points of the joinder where the members are bonded to one another and are nonuniform in areas associated with other points of the joinder.
Claim 3
Dependent Claim
67 words
The method of claim 1 wherein the section of surface of which the hologram is formed includes a line of the joinder of the pair of members and the families of fringe lines which are displayed on the image are continuous across the line of joinder at points where the members are bonded to one another and are discontinuous at other points across the line of joinDer.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein one of the pair of abutting members constitutes the diaphragm of a sonic transducer and vibrations are induced in the members by energizing the transducer.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the members are caused to vibrate by contacting them with a vibrating transducer.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein the members are caused to vibrate by inducing the vibrations into a fluid medium contacting the members.
Claim 7
Dependent Claim
45 words
The method of claim 1 wherein the hologram of the vibrating members is made by exposing a photographic plate to light from a coherent source which arrives at the plate directly and by reflection from said surface of the members and developing the photographic plate.
Claim 8
Dependent Claim
23 words
The method of claim 6 wherein the photographic plate is exposed for periods sufficient for the members to undergo a plurality of vibrations.
Claim 9
Dependent Claim
27 words
The method of claim 6 wherein the hologram is viewed by illuminating one side of it with a coherent light source and observing through the other side.
References Cited (Backward Citations)
US2645933A
Cited
US3226975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |