Radiant energy – Radiation controlling means – Shields
Patent
1979-03-09
1981-01-20
Smith, Alfred E.
Radiant energy
Radiation controlling means
Shields
250511, G21F 504, G21K 104
Patent
active
042464889
ABSTRACT:
A compact and light weight radiographic collimator including two pairs of radiation absorbent shutters connected together by a parallelogram linkage which provides a nested arrangement when the shutters are in their full open position yet provides an aligned relationship when fully closed. An off-focal vane construction in which the vanes are moved reciprocally is also disclosed.
The shutters and vanes may be either manually or automatically adjusted. Manual adjustment is automatically limited to the maximum safe open position.
A collimator adjusting drive train using constantly meshing gearing and a slip clutch is employed. A series of filter plates of varying thicknesses are provided. The operator can select the filtration desired by positioning each filter plate in either its filtering or nonfiltering position and then insert the stack of plates into a slot. A sensor provides an indication of when the filter assembly is positioned in the collimator.
Light beam centering and field size indication are provided from a single light source.
REFERENCES:
patent: 2887586 (1959-05-01), Reiniger
patent: 3023314 (1962-02-01), Hura
patent: 3502872 (1970-03-01), Norgren
patent: 3643095 (1972-02-01), Shuster
patent: 3678233 (1972-07-01), Faw et al.
patent: 3767931 (1973-10-01), Williams
patent: 3829701 (1974-08-01), Hura
patent: 3980407 (1976-09-01), Hill
O'Hare Thomas P.
Picker Corporation
Smith Alfred E.
LandOfFree
Radiation collimator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radiation collimator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiation collimator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1768695