The Machlett Laboratories, Incorporated

Greenwich Instruments Co., Inc.

Jonathan S Shapiro

Howard G Wagner

Vincent Berluti, Jr

William P Holland

Thomas W Fitzsimmons

Anthony J Pellegrino

A device for measuring anode tube current or filament current in an X-ray tube, comprising a coil of wire wrapped around an insulating tube to generate a solenoidal magnetic field, one or more pieces of magnetic material and insulating material located within the tube (which magnetic elements may have their electrical potential stabilized by a resistive voltage divider), and a Hall Effect current sensor (HECS) located at the far end of the tube and insulated from the magnetic material. The output of the Hall Effects sensor is connected to an amplifier circuit, and a secondary coil of wire is used to capture the high frequency component of the magnetic signal. The secondary coil is connected to a current amplifier circuit which is followed by a high pass filter to only provide components above the cross over frequency of the hall sensor. The two signals are combined with an amplifier to provide a broad band signal that may be viewed by a current amplifier.

Solenoidal Hall effects current sensor

A control system for rotating anode x-ray tubes comprising an x-ray tube including an anode rotated by a motor having mounted therein photoelectric means for sensing rotational movement of the anode, and circuit means electrically connected to the tube, the photoelectric means, and the motor for regulating operation of the tube and rotational speed of the motor in accordance with parameters selected for operation of the tube.

X-Ray tube control system

X-ray tube control system

A radiographic system comprising an X-ray source disposed to direct an X-ray beam through an adjustable shutter aperture in an aligned collimator and onto an image receptor in a holder located at a preselected distance from the source; and automatic means for preventing an X-ray exposure until prescribed operating conditions have been satisfied, the automatic means including a readily interchangeable read-only-memory module for storing the prescribed conditions therein and ascertaining whether or not the prescribed conditions have been met.

Radiographic system

An X-ray tube test system comprising signal processing circuitry including means for converting an analog signal representative of anode current into a train of pulses having an instantaneous frequency proportional to corresponding instantaneous amplitude values of the analog signal, means for counting the pulses in the train during an exposure time interval to obtain an integrated milliampere-second (MAS) value, means for summing a train of pulses having a uniform frequency during an interval of time equivalent to the exposure time interval to obtain an integral value for the exposure time, means for optionally dividing the MAS value by the exposure time value to obtain an average anode current (MA) value during the exposure time interval, and means for displaying numerical equivalents of the values thus obtained.

X-ray testing system

A radiographic system comprising an X-ray source disposed to direct an X-ray beam through an adjustable shutter aperture in an aligned collimator and onto an image receptor in a holder located at a preselected distance from the source; and automatic means for preventing an X-ray exposure until prescribed operating conditions have been satisfied, the automatic means including read-only-memory means for storing the prescribed conditions therein and ascertaining whether or not the prescribed conditions have been met.

X-Ray tube monitoring apparatus comprising a shockproof housing having insulatingly disposed therein for electrical connection between the anode of an X-ray tube and a high voltage source a current sensing means which is operatively connected to opto-electronic means for transmitting a linearized light output signal corresponding to an anode current passing through the sensing means safely out of the shockproof housing to a relatively low voltage amplifying and display means.

Growing community of inventors

Greenwich, CT, United States of America

Jonathan S Shapiro