X-ray or gamma ray systems or devices – Photographic detector support – For movable film or plate
Patent
1980-09-29
1982-12-07
Church, Craig E.
X-ray or gamma ray systems or devices
Photographic detector support
For movable film or plate
378189, 378197, G03B 4116
Patent
active
043631282
ABSTRACT:
An X-ray apparatus has a moveable support on which are slidingly mounted an X-ray tube, an image intensifier and a film holder, these radiation components defining a common radiation axis. By including a reversible motor connected to a system of clutch operated drive linkages the X-ray tube and receptors can be selectively and reciprocally moved along the radiation axis in either an independent or interdependent manner so as to preserve a radiologically desirable Source to Image Distance (SID) while simultaneously accommodating other X-ray examination requirements such as patient comfort, safety, and desired examining position. The X-ray tube is attached to a lever arm and the image intensifier and film holder are each moved by respective cables travelling around respective drive pulleys and idler pulleys. Both the X-ray tube and receptors are closely counterbalanced by counterweights respectively moved by the cables. When the drive motor is appropriately engaged, a connecting shaft, belt or sprocket chain transmits the motor's force selectively through intermediate, force limited, slip clutches to the appropriate X-ray components.
REFERENCES:
patent: 3803418 (1974-04-01), Holstrom
patent: 3833813 (1974-09-01), James
Grady John K.
Rice Paul G.
Church Craig E.
Grady John K.
Grover James H.
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