Radiant energy – Invisible radiation responsive nonelectric signalling – Luminescent device
Patent
1975-08-04
1977-03-29
Smith, Alfred E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Luminescent device
G03C 516
Patent
active
040151328
ABSTRACT:
An X-ray film holder comprising a bent base plate and a flexible cover plate which can be pressed against the base plate by means of a lever. The axis of rotation of the lever is situated substantially in the plane of the base plate. The film holder prevents friction between base plate and cover plate and facilitates the insertion and removal of the film.
REFERENCES:
patent: 2056279 (1936-10-01), Kulick
patent: 3784835 (1974-01-01), Schmidt
patent: 3836783 (1974-09-01), Stieuenart et al.
patent: 3870889 (1975-03-01), Schmidt
Buschbeck Jurgen
Pfeiffer Wilfried
Anderson B. C.
Drumheller Ronald L.
Smith Alfred E.
Trifari Frank R.
U.S. Philips Corporation
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