X-ray or gamma ray systems or devices – Beam control – Collimator
Patent
1982-03-29
1984-04-17
Smith, Alfred E.
X-ray or gamma ray systems or devices
Beam control
Collimator
33125R, G03B 4116, G01B 502
Patent
active
044438885
ABSTRACT:
An improvement in Source-to-Image Distance monitors for automatic adjusting X-ray radiography equipment having a cable, rewind spring, a self-traversing constant diameter takeup drum moving past a fixed aperture, an electrical potentiometer to provide a continuously varying electrical output signal and a snap action switch mechanism to indicate relative movement of the X-ray apparatus being monitored.
REFERENCES:
patent: 2293730 (1942-08-01), Guttmann
patent: 2293733 (1942-08-01), Guttmann
patent: 3566477 (1971-03-01), Williams
patent: 3581094 (1971-05-01), Peyser
patent: 3863073 (1975-01-01), Wagner
patent: 3936943 (1976-02-01), Bullard
Machlett Technical Manual, St-3450 Collimaster, C, Machlett Labs. Inc., Stamford Ct., pp. 1, 10, 35 & FIG. 5-2.
Grisby T. N.
Haurykiewicz John M.
Litton Industrial Products Inc.
Smith Alfred E.
Thiel Walter R.
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