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:
Sep. 05, 1978
Filed:
Oct. 14, 1975
Applicant:
Inventors:
Thomas R Wells, Des Plaines, IL (US);
Theodore E Dahlen, West Bend, WI (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
353101 ; 353 87 ; 353 78 ;
Abstract
A microfiche reader providing varying optical paths of projection of a microfiche image. The light source for the reader may be removed and readily replaced without the operator's touching the sensitive lamp. Dual image forming, floating lenses having a universal focusing system provide multiple magnification capabilities with uniform focusing in all positions of the microfiche. The focusing system is self-compensating for mechanical tolerances. Additional means prevent chipping of the glass plates holding the microfiche when the floating lenses are removed from contact with the glass plates.