Apparatus for automatically limiting the size of an x-ray beam in response to cassette size

摘要: The size of an X-ray beam is automatically adjusted in response to signals produced by a pair continuously variable transducers, such as rotary potentiometers, mounted on cassette holder. One the transducers preferably pivoted arm holder adapted contact side positioned other transducer adjusted, through suitable gearing, cable connected one jaws which center preferred embodiment also has switch and means open when there no order prevent generator from being activated.