X-ray or gamma ray systems or devices – Electronic circuit – With switching means
Patent
1991-03-28
1992-03-17
Church, Craig E.
X-ray or gamma ray systems or devices
Electronic circuit
With switching means
378 91, H05G 154
Patent
active
050974955
ABSTRACT:
An X-ray apparatus has a motor for moving its components in different directions. A collision sensor is formed by a bladder attached to a component of the apparatus and deformation of the bladder produces a change in the pressure of air within the bladder. The bladder has an air vent to the atmosphere which can be sealed by operation of a valve. A pressure sensor produces two control signals when the pressure within the bladder exceeds first and second threshold levels respectively. The second threshold level is greater in magnitude than said first threshold level. The first control signal closes the valve and causes a motor control circuit to discontinue any application of electricity to the motor. The second control signal opens a switch through which electricity normally flows to the motor. A mechanism also is provided to simulate a collision by compressing the bladder to test the operation of the detection system.
REFERENCES:
patent: 4733408 (1988-03-01), Beikuefner et al.
Cross-Sectional View of Collision Sensor, admitted prior art.
GE Medical Systems, Advantx Card POS SP/BP Fluoro Schematics, Rev. B, Direction 19310, p. 24-2, admitted prior art.
Filtz Duane A.
Gilling Christopher J.
Gray Floyd L.
Church Craig E.
General Electric Company
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