ALARM MEANS FOR COBALT THERAPY MACHINE

摘要

An alarm means on a cobalt therapy machine of the type in which the patient rests on a stretcher and a moving rotating head of a cobalt irradiation device moves relative to the stretcher. Transducers measure changes in the forces on the stretcher, and so provide an alarm upon any interference between the moving parts and the stretcher by measuring the difference between an output signal and a reference signal.