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US 4,063,100 AGranted
Radiographic table with movable grid assembly
OwnerLee B. Williamsinventor
Life of this patent
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Abstract
A radiographic table is provided with the usual carriage for supporting a film cassette and a grid assembly. The grid assembly itself is resiliently mounted in the carriage for oscillating movement in a transverse direction during exposure of a patient's body to radiation to avoid the presence of grid lines on the developed film. The oscillatory motion is effected by a magnetic coupling so that no physical contacting of the grid assembly is necessary to effect the desired movement.
Claims4
A radiographic table with a movable grid assembly in cluding, in combination:
- a. a table bed frame;
- b. a carriage for a film cassette mounted on said bed frame for longitudinal movement to selected positions between the head and foot of the bed frame;
- c. a grid assembly;
- d. resilient means mounting said grid assembly to said carriage for transverse oscillating movement;
- e. movable magnetic responsive means carried on said carriage;
- and
- f. a magnet in magnetic field coupling relationship to said movable magnetic responsive means secured to said grid assembly, whereby movement of said movable magnetic responsive means past said magnet in a direction having a transverse component results in transverse oscillating movement of said grid assembly relative to said carriage.
4 more elements
Dependencies are inferred from the claim text.