Radiant energy – Radiation controlling means – Shields
Patent
1976-06-17
1979-01-30
Smith, Alfred E.
Radiant energy
Radiation controlling means
Shields
G21F 504, G21K 104
Patent
active
041374606
ABSTRACT:
A radiographic system comprising an X-ray source disposed to direct an X-ray beam through an adjustable shutter aperture in an aligned collimator and onto an image receptor in a holder located at a preselected distance from the source; and automatic means for preventing an X-ray exposure until prescribed operating conditions have been satisfied, the automatic means including a readily interchangeable read-only-memory module for storing the prescribed conditions therein and ascertaining whether or not the prescribed conditions have been met.
REFERENCES:
patent: 3581094 (1971-05-01), Peyser et al.
patent: 3764808 (1973-10-01), Lackey et al.
"A Tiny Chip Brings a Big Payoff," Business Week, Apr. 17, 1965, pp. 85-88.
Berluti, Jr. Vincent
Fitzsimmons Thomas W.
Shapiro Jonathan S.
Wagner Howard G.
Grigsby T. N.
Meaney John T.
Murphy Harold A.
Pannone Joseph D.
Smith Alfred E.
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