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:
Feb. 09, 1982
Filed:
Feb. 15, 1980
Alan L Harmer, Bernex, CH;
Battelle Memorial Institute, Carouge, CH;
Abstract
A two-position switch for the control of a load, e.g. of a channel selector of a television receiver, comprises a transparent or translucent pushbutton with a stem carrying an optical reflector, such as a prism with a metallized surface, in an opaque housing receiving proximal ends of two optical fibers or fiber bundles whose distal ends confront a light source and a photodetector, respectively. In one position, the reflector directs light from the source to an exposed face of the pushbutton as a signal visible to the user while cutting off the illumination of the photodetector; in the other position, the visible light signal disappears while the photodetector is irradiated to operate the load.