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:
Apr. 17, 1984
Filed:
Aug. 31, 1981
Applicant:
Inventors:
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
362300 ; 40579 ; 362301 ; 362307 ; 362310 ; 362311 ; 362351 ; 362362 ; 362375 ; 362812 ; 362 30 ;
Abstract
A diaphragm having a plurality of apertures each associated with a title block on the front panel of an indicator unit is provided to cause the various title blocks to be illuminated evenly from a light source positioned behind the diaphragm. The size, number and shape of the apertures is so chosen that all of the title blocks are equally illuminated regardless of their size and regardless of their distance to the light source. Indirect light is used to prevent the formation of shadows and light spots on the title blocks.