Dental radiographic apparatus for photographing entire jaws
AssigneeKabushiki Kaisha Morita Seisakusho
InventorMasakazu Suzuki
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Abstract
The disclosure relates to a dental radiographic apparatus for photographing the entire jaws wherein the apparatus includes an X-ray generator and an X-ray film cassette holder mounted respectively at one end of a rotary arm and at the other end thereof. The apparatus electrically controls an X-ray film feed speed so as to be corresponding to and synchronous with the rotatingly travelling speed of the X-ray generator.
Claims11
A dental radiographic apparatus for photographing the entire jaws wherein the apparatus includes a horizontal rotary arm and a drive motor for rotating said horizontal rotary arm, said arm having an X-ray generator at one end thereof and having an X-ray film cassette holder for a film cassette containing an X-ray film therein at the other end thereof in such manner as to dispose an object between the generator and the cassette holder and said arm further being designed to make a tomogram of the entire jaws of said object by driving said rotary arm drive motor, said photographic apparatus being characterized in that the apparatus includes a film feed motor different from said rotary arm drive motor and adapted to feed the film in said film cassette holder, a means for converting the number of rotations of said rotary arm drive motor into an electrical signal and a film feed motor drive control circuit for variably controlling the number or rotations of said film feed motor by following and in synchronism with the number of rotations of said rotary arm drive motor.
Dependencies are inferred from the claim text.