The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1977
Filed:
Oct. 02, 1975
Applicant:
Inventors:
Thomas R Wells, Des Plaines, IL (US);
Theodore E Dahlen, West Bend, WI (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
353 / ;
Abstract
A library file of microfiche film comprises a plurality of spaced parallel film stored inside a cartridge. In a microfiche reader, a reciprocally moving extractor moves into and out of the cartridge to extract and return microfiche. An elevator control means selectively raises or lowers the cartridge relatively to the extractor, thereby selecting a particular microfiche. An interlock mechanism actuated by the extractor and selectively connected to the elevator control means prevents the elevator from moving after a microfiche is extracted and before it is returned to the cartridge.