X-ray device with a stand

Claim 1

An X-ray device, comprising a bracket, a stand, an axle carried by said stand and rotatably supporting said bracket, a carrying arm, an axle extending parallel to the first-mentioned axle and supporting one end of said arm upon one end of said bracket, a third axle carried by the other end of said arm and extending parallel to the first- and second-mentioned axles, an X-ray tube carried by said third axle, driving means connected with said axles for maintaining constant the location of said arm and always directing the central ray of the X-ray tube parallel to the longitudinal direction of said bracket, an axle rotatably supporting said stand and extending perpendicularly to the firstmentioned axle, the axis of the last-mentioned axle extending through the common intersection point of the central rays of the X-ray tube in all positions of said bracket, said third axle having an axis extending through the focal point of said X-ray tube, wherein said means comprise two chain wheels and an endless chain enclosing said chain wheels, said chain wheels being mounted upon the second and third-mentioned axles on opposite ends of said arm, one of said chain wheels being coupled with said bracket, the other one of said chain wheels beIng coupled with said X-ray tube, whereby the longitudinal axis of said bracket is maintained parallel to the central ray of X-ray tube, the first-mentioned axle extending horizontally, said means maintaining said arm in a vertical position.