Bracket for supporting universal arm of dental X-ray apparatus

Claim 1

A bracket for supporting a universal arm of a dental X-ray apparatus having a construction in which: a longitudinal axis hole in which a base portion vertical shaft of said universal arm is inserted is formed in a boss which is provided in a front surface of a bracket base plate of said bracket in projecting manner; a plurality of mounting holes for receiving screws are formed in four corners of said bracket base plate, one of which mounting holes acts as a reference hole, another of which mounting holes acts as a clearance hole which is positioned on a diagonal line of said bracket base plate, which diagonal line passes through said reference hole, a diameter of which clearance hole is slightly larger than that of said screw acting as a setscrew; a pair of adjust-screw holes are formed in series in a portion of said bracket base plate of said bracket (2) in which portion said clearance hole is formed, so that a mutual longitudinal axis of said pair of said adjust-screw holes crosses said diagonal line passing through said reference hole and said clearance hole and also crosses said clearance hole (7), and a pair of adjust screws (14a, 14b) are threadably engaged in said pair of (16a, 16b).