High speed x-ray shutter

Details High speed x-ray shutter High speed x-ray shutter

1984-03-27

1986-05-27

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Shutter or chopper

250233, 2504981, 378 4, G21K 104

Patent

active

045920834

ABSTRACT:
A high speed actuator for controlling the shutter in x-ray equipment so as to eliminate transition time during which the x-ray dose is wasted. The actuator includes a driving solenoid for rotating and axially displacing a shutter member so as to move a shutter aperture to an open position, a mechanical arrangement for blocking movement of the member when the shutter aperture reaches the open position, and an electro-magnetic brake, having an armature and coil, interconnected with the driving solenoid such that braking engagement between the armature and coil is effected by movement of the shutter member and aperture to the open position.

REFERENCES:
patent: 3021751 (1962-02-01), Barnette
patent: 3119019 (1964-01-01), Henry et al.
patent: 3124689 (1964-03-01), Shure
patent: 3275831 (1966-09-01), Martin
patent: 3384751 (1968-05-01), Sperry
patent: 4029963 (1977-06-01), Alvarez et al.
patent: 4071771 (1978-01-01), Covic et al.
patent: 4143273 (1979-03-01), Richey et al.
patent: 4277685 (1981-07-01), Covic et al.
patent: 4370631 (1983-01-01), Gerber et al.
patent: 4399550 (1983-08-01), Hauck et al.

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