Patent US4577341A successfully refreshed from Google Patents.
US4577341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm arrangement for X-ray spot-film device
Assignee: US Philips Corp
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Filing: 1983-03-03
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Granted: 1986-03-18
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Expires: 2003-03-03
Abstract
Abstract The invention relates to diaphragm means arranged close to the film in an X-ray spot film device. The diaphragm means comprises a first diaphragm with several rectangular aperture sections. The sections are displaced in the horizontal direction and have different vertical dimensions. A second diaphragm assembly has vertically extending diaphragm edges. By moving the first diaphragm to different positions in the radiation path, the aperture can be adapted to exposure formats of different vertical dimensions.
Inventors
- 👤 Horst H. Schwieker
- 👤 Kurt Gieschen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:35
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/06; G; G03; G03B; G03B42/00; G03B42/02; G03B42/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A diaphragm arrangement for an X-ray spot film device, said diaphragm arrangement comprising: a first diaphragm having a first axis and having at least two rectangular apertures therein along the axis, said first diaphragm being displaceable in the direction of its axis, each rectangular aperture having a different size; a second diaphragm having a second axis transverse to the first axis, said second diaphragm defining an aperture having edges parallel to the second axis, said second diaphragm being arranged to overlap the first diaphragm so that the two diaphragms selectively define an exposure field wherein said first diaphragm defines a dimension in the direction of said second axis and said second diaphragm defines a dimension in the direction of said first axis; and motor means for displacing the first diaphragm along said first axis.
Claim 2
Dependent Claim
134 words
A diaphragm arrangement for an X-ray spot film device, said diaphragm arrangement comprising: a first diaphragm having a first axis and having at least two rectangular apertures therein along the axis, said first diaphragm being displaceable in the direction of its axis, each rectangular aperture having a different size; a second diaphragm having a second axis transverse to the first axis, said second diaphragm defining an aperture having edges parallel to the second axis, said second diaphragm being arranged to overlap the first diaphragm so that the two diaphragms selectively define an exposure field wherein said first diaphragm defines a dimension in the direction of said second axis and said second diaphragm defines a dimension in the direction of said first axis; and motor means for displacing the first diaphragm along said first axis.
Claim 3
Dependent Claim
58 words
A diaphragm arrangement as claimed in claim 1, characterized in that the second diaphragm comprises two diaphragm plates having edges parallel to the second axis which face each other, said plates being displaceable in the direction of the first axis, said plates being coupled to each other so that their edges are always symmetrical about the second axis.
Claim 4
Dependent Claim
21 words
A diaphragm arrangement as claimed in claim 2, characterized in that the rectangular apertures in the first diaphragm adjoin each other.
Claim 5
Dependent Claim
22 words
A diaphragm arrangement as claimed in claim 3, characterized in that the first axis is horizontal and the second axis is vertical.
Claim 6
Dependent Claim
30 words
A diaphragm arrangement as claimed in claim 4, characterized in that each aperture in the first diaphragm has a horizontal dimension equal to the maximum width of the exposure field.
Claim 7
Dependent Claim
21 words
A diaphragm arrangement as claimed in claim 1, characterized in that the rectangular apertures in the first diaphragm adjoin each other.
Claim 8
Dependent Claim
22 words
A diaphragm arrangement as claimed in claim 6, characterized in that the first axis is horizontal and the second axis is vertical.
Claim 9
Dependent Claim
30 words
A diaphragm arrangement as claimed in claim 7, characterized in that each aperture in the first diaphragm has a horizontal dimension equal to the maximum width of the exposure field.
Claim 10
Dependent Claim
22 words
A diaphragm arrangement as claimed in claim 1, characterized in that the first axis is horizontal, and the second axis is vertical.
Claim 11
Dependent Claim
30 words
A diaphragm arrangement as claimed in claim 9, characterized in that each aperture in the first diaphragm has a horizontal dimension equal to the maximum width of the exposure field.
Claim 12
Dependent Claim
24 words
A diaphragm arrangement as claimed in claim 10, characterized in that the motor means also displaces the two diaphragm plates of the second diaphragm.
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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |