Microfilm reader

Details Microfilm reader Microfilm reader

1976-09-16

1978-03-07

Haroian, Harry N.

Optics: image projectors

Selective data retrieval

Plural picture rows on single microcard

353 23, G03B 2110, G03B 2308

Patent

active

040777081

ABSTRACT:
A holding frame holds a microfiche. Guide rails mount the holding frame on the microfilm reader housing for movement along two perpendicular coordinate axes for moving selected portions of the microfiche held by the frame into position to be projected. An arresting device arrests the frame in selected positions and includes a stationary clamped structure on the housing and a cooperating releasable clamping structure on the frame. The clamping structure when not released clamps the clamped structure and thereby arrests the frame relative to the housing.

REFERENCES:
patent: 2534561 (1950-12-01), Silver
patent: 3817612 (1974-06-01), Maier et al.
patent: 3868179 (1975-02-01), Zeutschel

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