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:
Dec. 13, 1983
Filed:
Jun. 04, 1981
Gerd Kammerer, St. Georgen, DE;
Dieter Graesslin Feinwerktechnik, St. Georgen, DE;
Abstract
A key contact set includes a plurality of electrical key contacts having key buttons, and includes a cover plate with a plurality of key openings through which the respective key buttons project. The key openings and the key buttons each have the shape of a segment of a circle, an ellipse, or a similarly shaped figure. The marking associated with each key is provided on the cover plate in the complementary segment of the circle, ellipse, or other figure. The portion of the cover plate surrounding each key is preferably bent forwardly or rearwardly from the main plane of the cover plate to define a curved surface, and each key button preferably is provided with a service surface having substantially the same radius of curvature as the bent portion of the cover plate.