B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
358/22
B01J 19/08 (2006.01) G21K 5/02 (2006.01)
Patent
CA 1048170
ABSTRACT OF THE DISCLOSURE The radiation source frame of a gamma irradiating apparatus is moved into and out of its operative position by elevator means comprising block and tackle and an act- uating servo-motor, the servo-motor being operatively ass- ociated with the load or slow-motion and of the block and tackle, while the frame is operatively connected with the fast or force-end of the block and tackle. The servo-motor is a pneumatic or hydraulic piston-cylinder motor, the supply line of which is arranged to be gradually throttled when the pis- ton of the motor reaches its end position corresponding to a screened position of the frame. The arrangement thus pro- vides for a relatively rapid but still retarded downward movement of the frame in emergency cases, the movement being further retarded by the said throttling effect.
233820
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