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. 11, 1979
Filed:
Nov. 16, 1977
Thomas J Persha, Juneau, WI (US);
Eino M Lehto, Juneau, WI (US);
Richard Dueck, Hartford, WI (US);
Nick Hechimovich, Horicon, WI (US);
Bell & Howell Company, Chicago, IL (US);
Abstract
A lamp assembly and power module is provided for a microform display apparatus, such as a fanless microfiche reader. The lamp assembly and power module are both situated in a drawer which is removably inserted into the base of the reader to form an air-restricted path for the efficient convection of heat away from the reader. By setting the lamp at an angle to the longitudinal axis of the drawer, both the lamp assembly and power module components can fit in the drawer. The front end of the drawer is provided with a grille for air passage, and a chimney structure is situated adjacent the rear of the drawer for the efficient evacuation of heat. The lamp and power module are located below the chimney, and as the lamp and power module components heat the surrounding air, the air rises up the chimney and out of the reader by convection. This air movement creates a draft through the grille in the front of the drawer, which serves to sufficiently cool the components.