Abstract: A boost circuit for providing rapid acceleration of anode rotating motors for X-Ray tubes features provision for supplying to the motor for a limited period of time a relatively high power AC excitation at a frequency well above that corresponding to the rotation speed to be maintained during exposure. Once proper operating speed is reached, the motor power supply voltage is reduced to a safe power level with respect to the stator windings, and the frequency is reduced to correspond to the desired running speed during exposure. In the preferred embodiment the changeover is governed by means of an empirically adjusted timer; however, changeover may be controlled by a variety of means.

Abstract: This invention relates to a mobile ionization chamber assembly for monitoring the amount of radiation delivered to an X-ray film from an X-ray source. The ionization chamber together with a portable power supply therefor are encased in an insulated housing for reducing electrical hazards to the patient and operator involved in the X-ray procedure.

Abstract: This invention relates to an X-ray system including an ion chamber for monitoring and controlling the amount of radiation delivered to the X-ray film.

Abstract: A digital X-ray system for measuring X-ray beam quality such as the peak voltage applied to the X-ray tube and/or half value layer of the X-ray beam.

Abstract: A system for controlling the operation of the starter for X-ray tubes and more specifically the acceleration and operation of the rotating anodes of the X-ray tubes in accordance with any one of several X-ray exposure functions to be performed. The system includes D.C. braking controls, means to prevent X-ray exposure during the acceleration and deceleration periods, and means for assuring that one operating sequence is terminated before a succeeding operating sequence is initiated.

Abstract: A solid state starter to selectively accelerate X-ray tube rotors to the low speed utilized for fluoroscopic examinations and up to the high speed required for spot-film or radiographic exposure operation, and wherein the speeds of the rotor may be varied throughout the speed range.

Abstract: A closed loop system is disclosed for monitoring and regulating the power applied to the stator of an induction motor for controlling the operation of the rotating anode of an X-ray tube in order to insure acceleration of the rotor to a selected speed of rotation, to maintain the selected speed of rotation, and to provide a braking voltage to the rotor as desired. The system provides direct inter-related operation of an anode rotor, an anode rotor rotation sensing detector, and an X-ray generator.

Abstract: An apparatus for sensing the speed of a rotating anode of an X-ray tube and for providing signals responsive to the detected rotating speed.