US3670563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixture for supporting articles during vibration tests
Assignee: National Aeronautics and Space Administration
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Filing: 1970-10-05
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Granted: 1972-06-20
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Expires: 1990-10-05
Abstract
Abstract A fixture for supporting and securing articles, such as electrical components, during vibration testing of the articles comprising an integral annular unit having a series of spaced blind cavities formed in its top surface and a series of spaced blind cavities formed around its outer surface. Articles to be vibration tested are secured in the cavities of the fixture and the fixture is mounted on the driver head of a vibration exciter whereby the fixture is aligned with the driver coil of the exciter. The cavities may be in the form of partially threaded bores with an intermediate shoulder to receive a disk and a clamping nut for securing test items in the bores.
Inventors
- 👤 David J Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:29
CPC Classifications
G; G01; G01M; G01M7/00; G01M7/02; G01M7/027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
191 words
A fixture for supporting and securing vibration test articles during vibration testing of the articles on a vibration exciter of the type having a driver head and a driver coil comprising: a. an annular unit corresponding in shape to the driver coil of the vibration exciter with which said unit is to be used; b. said unit having a substantially coplanar top surface, a substantially coplanar bottom surface and an outer circumferential surface; c. said unit having a plurality of radially spaced blind cavities for containing vibration test articles located around said top surface of said unit and opening at said top surface; d. said unit having a plurality of radially spaced blind cavities for containing vibration test articles located around said outer circumferential surface of said unit and opening at said outer circumferential surface; e. said cavities opening at said top surface being entirely offset radially from said cavities opening at said outer circumferential surface; f. said unit having a plurality of holes adjacent each of said cavities for facilitating the mounting of vibration test articles in said cavities; g. said holes being small in size relative to said cavities.
Claim 2
Dependent Claim
191 words
A fixture for supporting and securing vibration test articles during vibration testing of the articles on a vibration exciter of the type having a driver head and a driver coil comprising: a. an annular unit corresponding in shape to the driver coil of the vibration exciter with which said unit is to be used; b. said unit having a substantially coplanar top surface, a substantially coplanar bottom surface and an outer circumferential surface; c. said unit having a plurality of radially spaced blind cavities for containing vibration test articles located around said top surface of said unit and opening at said top surface; d. said unit having a plurality of radially spaced blind cavities for containing vibration test articles located around said outer circumferential surface of said unit and opening at said outer circumferential surface; e. said cavities opening at said top surface being entirely offset radially from said cavities opening at said outer circumferential surface; f. said unit having a plurality of holes adjacent each of said cavities for facilitating the mounting of vibration test articles in said cavities; g. said holes being small in size relative to said cavities.
Claim 3
Dependent Claim
57 words
The invention as defined in claim 1 wherein at least one of said cavities is circular, said circular cavity having varying diameters forming an annular shoulder within said circular cavity, the outer portion of said circular cavity being threaded, a disk bearing on said shoulder, an annular nut engaging said threaded portion and bearing on said disk.
Claim 4
Dependent Claim
19 words
The invention as defined in claim 2 including an opening in said disk for receiving a vibration test article.
Claim 5
Dependent Claim
48 words
The invention as defined in claim 1 wherein at least six of said cavities for receiving test articles are formed in said top surface of said unit and at least six of said cavities for receiving test articles are formed in said outer circumferential surface of said unit.
Claim 6
Dependent Claim
43 words
The invention as defined in claim 4 wherein said cavities for receiving test articles are centered at substantially 60* spacings radially around said top surface, two of said cavities around said outer peripheral surface being located between each of said 60* radial spacings.
Claim 7
Dependent Claim
66 words
The invention as defined in claim 4 including a vibration exciter having a driver head and a driver coil, said unit being rigidly mounted on said driver head in substantially vertical alignment with said driver coil, a vibration test article mounted in one of said cavities in said top surface and a vibration test article mounted in one of said cavities around said outer circumferential surface.
Claim 8
Dependent Claim
46 words
The invention as defined in claim 6 including a test article mounting plate supporting each of said test articles, said mounting plate overlying each of said cavities in which said test articles are mounted, fasteners extending through said plate and into said holes adjacent said cavities.
Claim 9
Dependent Claim
42 words
The invention as defined in claim 6 including a plurality of fasteners extending through said unit and engaging said vibration exciter, said fasteners being radially spaced around said unit, the radial spacing between any two of said fasteners not substantially exceeding 60*.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |