Automatic backout control for a motorized positioning X-ray appa

Details Automatic backout control for a motorized positioning X-ray appa Automatic backout control for a motorized positioning X-ray appa

1989-04-25

1991-01-22

Westin, Edward P.

X-ray or gamma ray systems or devices

Electronic circuit

378 95, 378197, H05G 108

Patent

active

049875833

ABSTRACT:
An X-ray apparatus has motors for moving its components in different directions. Sensors are provided to detect a collision between a motor driven component and an object, such as a patient being examined. In response to a collision being detected, a normal motor power supply is disconnected from the motor and another power supply is connected to the motor to move the component in the reverse direction. A safeguard is incorporated to insure that both power supplies cannot be coupled to the motor at the same time. For components which can strike a patient when moving in either of two directions, different collision sensors are provided for each direction. For this configuration, a mechanism also is provided to inhibit the connection of the other power supply when collisions are simultaneously detected each direction of component movement.

REFERENCES:
patent: 2749445 (1956-06-01), Stava et al.
patent: 3783251 (1974-01-01), Pavkovich
patent: 4107590 (1978-08-01), Pury et al.
patent: 4358856 (1982-11-01), Stivender et al.
patent: 4392096 (1983-07-01), Grajewski et al.
patent: 4448200 (1984-05-01), Brooks et al.
patent: 4578757 (1986-03-01), Stark
patent: 4807273 (1989-02-01), Haendle

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