US3887804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic test stand
Assignee: United States Department of Health and Human Services
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Filing: 1973-12-03
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Granted: 1975-06-03
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Expires: 1993-12-03
Abstract
Abstract A test stand for maintaining fixed geometry during X-ray imaging comprises a slide aperture for beam definition, a slide assembly having a wire grid for image sizing; and magnetic tape which secures metal strips for marking the edge of the light field relative to an X-ray field during imaging. The image is recorded on Linographic paper carried by the slide assembly.
Inventors
- 👤 Tommie J Morgan
- 👤 George I Coats
- 👤 Richard W Kisielewski
- 👤 Charles K Showalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:30
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/58; A61B6/582; A61B6/583; G; G03; G03B; G03B42/00; G03B42/02; G03B42/028
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
A test stand for maintaining fixed geometry during X-ray imaging, comprising: a substantially rectangular frame open at the front and back having substantially aligned first and second apertures in two opposing sides, first slide receiving means associated with each of said apertures for receiving and positioning a slide assembly over said apertures, and a plurality of second slide receiving means in two opposing sides of said frame other than those sides having said apertures for receiving and positioning a slide assembly parallel to and between said apertures at various predetermined positions between said apertures.
Claim 2
Dependent Claim
94 words
A test stand for maintaining fixed geometry during X-ray imaging, comprising: a substantially rectangular frame open at the front and back having substantially aligned first and second apertures in two opposing sides, first slide receiving means associated with each of said apertures for receiving and positioning a slide assembly over said apertures, and a plurality of second slide receiving means in two opposing sides of said frame other than those sides having said apertures for receiving and positioning a slide assembly parallel to and between said apertures at various predetermined positions between said apertures.
Claim 3
Dependent Claim
94 words
A test stand for maintaining fixed geometry during X-ray imaging, comprising: a substantially rectangular frame open at the front and back having substantially aligned first and second apertures in two opposing sides, first slide receiving means associated with each of said apertures for receiving and positioning a slide assembly over said apertures, and a plurality of second slide receiving means in two opposing sides of said frame other than those sides having said apertures for receiving and positioning a slide assembly parallel to and between said apertures at various predetermined positions between said apertures.
Claim 4
Dependent Claim
94 words
A test stand for maintaining fixed geometry during X-ray imaging, comprising: a substantially rectangular frame open at the front and back having substantially aligned first and second apertures in two opposing sides, first slide receiving means associated with each of said apertures for receiving and positioning a slide assembly over said apertures, and a plurality of second slide receiving means in two opposing sides of said frame other than those sides having said apertures for receiving and positioning a slide assembly parallel to and between said apertures at various predetermined positions between said apertures.
Claim 5
Dependent Claim
41 words
A test stand in accordance with claim 1 wherein said frame further includes a plurality of mounting means on the sides of said frame having said second slide receiving means for positioning an ion chamber at predetermined positions between said apertures.
Claim 6
Dependent Claim
32 words
A test stand in accordance with claim 2 further including an ion chamber and an ion chamber mount connected thereto, said ion chamber mount being positioned in one of said mounting means.
Claim 7
Dependent Claim
29 words
A test stand in accordance with claim 1 wherein said frame further includes spacer mounting means adjacent said first aperture for positioning a means for supporting an X-ray source.
Claim 8
Dependent Claim
44 words
A test stand in accordance with claim 4 further including a spacer means, mounted on said spacer mount means, for supporting the X-ray source a predetermined distance from said first aperture, said spacer means being positioned in alignment with said first and second apertures.
Claim 9
Dependent Claim
44 words
A test stand in accordance with claim 4 further including spacer means, mounted on said spacer mount means, for supporting the X-ray source a predetermined distance from said first aperture, said spacer means being positioned out of alignment with said first and second apertures.
Claim 10
Dependent Claim
42 words
A test stand in accordance with claim 1 further including a first slide assembly, positioned in one of said first slide receiving means, having an aperture therein, not larger than said first and second apertures of said frame, for radiation beam definition.
Claim 11
Dependent Claim
27 words
A test stand in accordance with claim 7 wherein said first slide assembly is made of lead and further includes means for holding the lead slide rigid.
Claim 12
Dependent Claim
23 words
A test stand in accordance with claim 8 wherein said first slide assembly further includes a brass attenuation block covering the aperture therein.
Claim 13
Dependent Claim
24 words
The test stand of claim 1 further comprising centering means located on said frame for properly aligning the test stand with the X-ray source.
Claim 14
Dependent Claim
84 words
A test stand in accordance with claim 1 further including a second slide assembly positioned in one of said second slide receiving means having first and second faces forming a slot means therebetween for receiving light-sensitive paper sensitive to X-rays, and having grid means on one of said faces for image sizing, adherent means adjacent said grid means for hOlding marker means in position when placed thereon, and metal marker means adhereable to said adherent means for marking predetermined areas of said grid means.
Claim 15
Dependent Claim
23 words
A test stand in accordance with claim 11 wherein said grid means comprises a wire grid and said adherent means comprises magnetic tape.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |