Patent Number: 039768899
Section: claims

1. 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. 2. 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. 3. 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. 4. 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. 5. 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. 6. 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.