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. 14, 1984
Filed:
Dec. 09, 1982
Heinrich Sauer, Amberg, DE;
Gunter Ritthammer, Amberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A pushbutton drive for key contacts is disclosed. The disclosed drive is provided with a mushroom button which is loaded by a restoring force and which includes a mushroom stem movably guided in a housing. The stem has a rest position, and an operating position detent which can be released by rotation of the mushroom button. A detent plunger spring-loaded transversely to the longitudinal direction of movement of the mushroom stem is supported in the housing. Rotation preventing edges or corners formed by intersecting surfaces are provided at the rest position to prevent rotation of the mushroom stem in the rest position. The invention makes undetected use of the switch impossible.