Illumination unit for microfilm readers

Details Illumination unit for microfilm readers Illumination unit for microfilm readers

1976-01-26

1978-07-11

Hix, L. T.

Illumination

Self powered lamp

With support

362285, 362296, 362343, 362394, F21L 700, F21V 1302, F21V 2304

Patent

active

041005910

ABSTRACT:
An illumination unit for microfilm viewers, and more particularly for microfilm viewers of the binocular-microscope type, providing illumination of the microfilm by a light source disposed either on the outside of the viewer or incorporated in the viewer, such that operation of the viewer does not depend on an outside source of light energy or electrical energy.

REFERENCES:
patent: 3389636 (1968-06-01), Weitzner et al.
patent: 3547533 (1965-11-01), Stokes et al.
patent: 3609344 (1971-07-01), Hung So
patent: 3817610 (1974-06-01), Skinner et al.
patent: 4012110 (1977-03-01), Schael et al.

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