Patent US3976889A successfully refreshed from Google Patents.
US3976889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray diagnostic apparatus
Assignee: Siemens AG
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Filing: 1974-08-23
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Granted: 1976-08-24
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Expires: 1994-08-23
Abstract
Abstract An X-ray diagnostic apparatus for X-ray exposures, having preset X-ray tube voltage and current values, and a preset exposure time and, more particularly, to an apparatus of this type which includes a plurality of filters in conformance with an exposure program for the X-radiation adapted to be selectively employed in coordination with a particular exposure object.
Inventors
- 👤 Erich Noske
- 👤 Ulrich Grassme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:50
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/40; A61B6/4035; A61B6/50; A61B6/51; G; G21; G21K; G21K1/00; G21K1/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
In an X-ray diagnostic apparatus for the preparation of dental X-ray exposures including means for fixedly setting values for the X-ray tube voltage and current, the improvement comprising: means for fixedly setting the exposure time; a plurality of filters for the X-radiation each coordinated with a particular exposure object in conformance with an exposure program in which the fixed values for said X-ray tube voltage, X-ray tube current and exposure time cannot be varied by a user of said diagnostic apparatus; and support means for said filters, said support means being adapted to selectively position a preselected one of said filters at any one time in the path of said X-radiation in conformance with a predetermined selected exposure object.
Claim 2
Dependent Claim
119 words
In an X-ray diagnostic apparatus for the preparation of dental X-ray exposures including means for fixedly setting values for the X-ray tube voltage and current, the improvement comprising: means for fixedly setting the exposure time; a plurality of filters for the X-radiation each coordinated with a particular exposure object in conformance with an exposure program in which the fixed values for said X-ray tube voltage, X-ray tube current and exposure time cannot be varied by a user of said diagnostic apparatus; and support means for said filters, said support means being adapted to selectively position a preselected one of said filters at any one time in the path of said X-radiation in conformance with a predetermined selected exposure object.
Claim 3
Dependent Claim
93 words
An apparatus as claimed in claim 1, said apparatus including an X-ray outlet aperture facilitating through passage of a central X-ray beam, said filter support means comprising a disc located proximate to said X-ray outlet aperture and being rotatable about an axis eccentric relative to said central X-ray beam, said filters being circumferentially spaced about said disc so as to have the centerpoints thereof define a circle concentric to the rotational axis of said disc, the radius of said circle corresponding to the distance between said central X-ray beam and said rotational axis.
Claim 4
Dependent Claim
39 words
An apparatus as claimed in claim 2, comprising a housing encompassing said filters and said filter support means, said disc having a rim portion thereof projecting outwardly of said housing adapted to facilitate manual rotational movement of said filters.
Claim 5
Dependent Claim
34 words
An apparatus as claimed in claim 3, comprising indicia indicative of the exposure object associated with a respective of said filters being provided on said portion of the disc projecting outwardly of said housing.
Claim 6
Dependent Claim
26 words
An apparatus as claimed in claim 1, said apparatus comprising a single-enclosure collectively housing the components of said X-ray diagnostic apparatus adapted for dental X-ray exposures.
Claim 7
Dependent Claim
33 words
An apparatus as claimed in claim 5, comprising primary switching circuit means for actuation of said apparatus, said single-enclosure including a generator, said generator and said circuit being constructed as a unitary entity.
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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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |