Richard A Hess

US Patent:

40322300, Jun 28, 1977

Filed:

Jul 21, 1975

Appl. No.:

5/597766

Inventors:

Matthew Shipman - New York NY
Richard Hess - Rye NY
Burton Kaufman - New York NY
Bruce H. Schneider - Douglaston NY

Assignee:

General Computing Corporation - New York NY

International Classification:

G03B 2752

US Classification:

355 42

Abstract:

A high speed microfilm searching system is disclosed. The system optically displays frames of the microfilm. A frame or column of microfilm is made up of a sensor mark, pages of information and an index code. The index code is a meaningful alphanumeric or numeric key that accompanies each page or column. If it is alphabetic it varies in strict alphabetic sequence. If the components of the key are numeric they vary in an increasing or decreasing order. Microfilm projecting means mounted in the filmpath between feed and take-up reels clearly display on a viewing screen a page of information when the microfilm is stationary in accordance with existing technology. The high speed search system is new technology. A strobe lamp displays indexes of the moving microfilm on a screen. Each of the frames having an index of digital form and also has an optically detectable marker.