Dental X-ray apparatus
AssigneeGesellschaft fur Elektronische Rohren Comet Bern
InventorWalter Rissi
Life of this patent
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Abstract
Apparatus for obtaining extra- and/or intra-oral dental X-ray photographs comprising an X-ray tube having an anticathode with a plane target surface inclined with respect to the cathode-ray axis. The anticathode is disposed in a small tube within an X-ray-permeable protective sleeve. For changing the mode of operation from extra-oral to intra-oral, an adapter is fitted over the protective sleeve and actuates a change-over switch disposed within the housing of the X-ray tube. Regulating means control the intensity of the cathode-ray depending upon the position of the change-over switch for making either extra- or intra-oral photographs.
Claims6
In apparatus for obtaining extra- and/or intra-oral dental X-ray photographs, of the type wherein high-voltage transformer and part of an X-ray tube are disposed in an inner casing contained within an outer housing, from an end face of which there projects an anode tube of said X-ray tube containing an anticathode and surrounded by an X-ray-permeable protective sleeve, the improvement comprising:
- a plane anticathode target surface disposed within said anode tube and inclined with respect to the cathode-ray axis of said X-ray tube,
- regulating means dependent upon the operating state of said apparatus for varying the cathode-ray current and/or the size of the focal spot,
- an adapter designed to be fitted over said protective sleeve and secured to said end face of said outer housing for obtaining said intra-oral X-ray photographs,
- a change-over switch disposed within said outer housing near said end face thereof and actuatable by said adapter for influencing said regulating means, and
- an X-ray-proof jacket forming part of said adapter and designed to fit over said protective sleeve coaxially therewith.
Dependencies are inferred from the claim text.