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. 17, 1981
Filed:
Jan. 08, 1979
Volker Speidel, Schalksmuhle, DE;
Eduard Bergmann, Ludenscheid-Dunnebrett, DE;
Lothar Worlitz, Altena, DE;
Firma Leopold Kostal, Ludenscheid, DE;
Abstract
An opto-electronical switching device provided with an operating push-button key, particularly for motor vehicles, comprises a housing, containing a photodiode and a phototransistor, a rectangular push-button key, guided in the housing, with aperture plate and with an after-connected interrogating circuit, responding to the switching condition of the phototransistor. A rectangular leaf spring, curved transversely to the longitudinal direction, supported with its corners upon ribs of the push-button key inner surface and curved away from the push-button key inner surface, and the counter-support of the leaf spring is formed by a pin in the geometrical mid-point.