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:
May. 23, 1978
Filed:
May. 03, 1976
Applicant:
Inventor:
Frank L Weninger, Chicago, IL (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; F16D / ; F16D / ;
U.S. Cl.
CPC ...
353 57 ; 64 3 / ; 192 / ;
Abstract
Disclosed is a blower assembly for use in dispersing heat from an image projector with minimum air flow noise by interposing a constant torque clutch formed of a dual wound spring between the blower and a motor output drive to permit the rate of rotation of the blower to vary in response to variations in air weight due to changes in temperature, atmospheric pressure, and moisture content.