Sybron Corporation

David Cowell

Frieder H Ensslin

A circuit protects a high voltage supply for x-ray tubes from the damaging effects of a tube flashover or the like. The circuit monitors line current, and high voltage and reacts to an increase in line current occurring with a corresponding drop in high voltage to turn off the high voltage.

High voltage protection circuit for x-ray systems

A power supply provides high voltage for a grid controlled x-ray tube. In the supply an oscillator generates a high frequency signal which is amplified and transformed to kilovoltage. A voltage multiplier increases the kilovoltage to a potential suitable for the tube. The voltage multiplier includes a bank of series capacitors which tends to maintain a constant high voltage when the tube is not conducting.

Power supply for triode x-ray tubes

A circuit for use with a X-ray tube applies filament power to preheat the tube prior to the application of high voltage. The preheat duration is made to be in inverse relation to the line voltage. The desired result is when the tube starts to conduct the tube current and tube voltage is held within acceptable limits regardless of line voltage variations.

Preheat circuit for X-ray tubes

An X-ray detector for converting X-ray energy into electrical energy which contains a X-ray sensitive fluorescent screen optically coupled to a photovoltaic energy conversion cell. An electrostatic shield is provided at the input of said fluorescent screen to shield the detector from both background electrical noise and ambient light. Mechanical configurations and electrical flexibility make the detector particularly well suited for the control of panoramic X-ray machines.

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Webster, NY, United States of America

David Cowell