Radiant energy – Invisible radiation responsive nonelectric signalling – Photographic type
Patent
1975-03-20
1976-06-08
Smith, Alfred E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Photographic type
250481, 250475, G03C 516
Patent
active
039625850
ABSTRACT:
An arrangement for the light-projection of indicia onto X-ray films, consisting of an X-ray film cassette having a window provided in a cassette wall extending in parallel with the film plane, including a magnetically-openable slide plate adapted to maintain the window in the closed position thereof in a light-sealed closeable condition, which is at least partly constituted of ferromagnetic material and is retained in a closed position by means of a resilient tongue and is supported so as to be rotatable about a pivot axis oriented perpendicularly to the film plane, a carrier for the indicia which are to be projected, and a light projecting device including a magnet at the entry path of the X-ray film cassette having its location correlated to the location of the window of the inserted X-ray film cassette.
REFERENCES:
patent: 2773436 (1956-12-01), Martin
Huttner Robert
Kutterer Gerhard
Anderson B. C.
Siemens Aktiengesellschaft
Smith Alfred E.
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