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:
Jan. 13, 1976
Filed:
Jan. 06, 1975
Joachim Staab, Frankfurt am Main, DT;
Willy Apel, Frankfurt am Main, DT;
Achim Drager, Eschhorn, DT;
Wilhelm-Rudiger Haberditz, Steinbach/Ts., DT;
Walter Fabinksi, Hattersheim, DT;
Hartmann & Braun Aktiengesellschaft, Frankfurt, DT;
Abstract
A cylindrical block is provided with two ducts, forming a V whose legs terminate in exit windows in one axial end face of the block. A light source is disposed in the bottom of the V to direct light into both ducts. The block is further traversed by a bore, terminating as to one end in between the windows, avoiding the ducts and terminating in an offset position relative to the V-bottom and the light source at the other end of the block. A shaft traverses this bore for rotating a shutter in front of the windows. A complementary, light receiving unit is disposed with misaligned entrance windows in front of the unit windows, but their centers are traversed respectively by the optical axes of the ducts.