X-ray or gamma ray systems or devices – Photographic detector support – For plural exposures on single film or plate
Patent
1985-07-29
1987-05-12
Schmidt, Frederick R.
X-ray or gamma ray systems or devices
Photographic detector support
For plural exposures on single film or plate
G03B 4202
Patent
active
046655425
ABSTRACT:
An X-ray table having a surface disposed in a plane defined by longitudinal and transverse axes and a column extending perpendicularly to such axes. The column includes a plurality of vertical tracks. A carriage is provided supporting a spot film device projecting over the table surface. The carriage comprises a plurality of bearing assemblies, corresponding to the plurality of tracks, for slidably mounting the carriage on the plurality of tracks of the column. Each bearing assembly comprises: a bearing plate mounted about a pivot point to a surface of the carriage; and, a plurality of opposing bearings rotatably mounted to the bearing plate and arranged to engage the corresponding one of the plurality of tracks on the column. Application of lateral force to the bearing plate of a first one of the bearing assemblies pivots the carriage about the pivot point of that bearing plate. Likewise, application of lateral force to the bearing plate of a second one of the bearing assemblies pivotes the carriage about the pivot point of that bearing plate. Thus, with such arrangement, the carriage is gimballed with respect to the column about the bearing assembly pivot points. The pivot points of the first and second bearing assemblies are disposed along the transverse and longitudinal axes, respectively. Hence the carriage, and the spot film device secured thereto, may be pivoted about the carriage with two degrees of freedom to level the spot film device with respect to the table surface along the longitudinal and transverse axes.
REFERENCES:
patent: 2966588 (1960-12-01), Kizaur
patent: 3641709 (1972-02-01), Gazuit
patent: 3862426 (1975-01-01), Thomas
patent: 3916203 (1975-10-01), Norgren
patent: 4190774 (1980-02-01), Marinkovich et al.
patent: 4412401 (1983-11-01), Fundell
Schad Steven P.
Schmidt Frederick R.
Sharkansky Richard M.
The Machlett Laboratories, Inc.
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