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:
Nov. 01, 1994
Filed:
Jan. 19, 1994
Ulrich Bruggeman, Heustreu, DE;
Hans-Karl Heil, Wildflecken, DE;
Gerhard Hochgesang, Bad Neustadt/Saale, DE;
Preh-Werke GmbH & Co. KG, Saale, DE;
Abstract
A push button switch, particularly a master switch, has housing-affixed contacts (4, 5) and a contact bridge (8) for bridging the contacts, with the bridge being moved by a spring plunger (10). A spring-switching mechanism (24, 25, 26) is operatively coupled between the spring plunger and a manually-movable sliding switch, or switch actuator, (22). The sliding switch (22) is engaged by a guiding, or sliding, locking linkage (27, 28) to be alternately moved between 'on' and 'off' positions upon being pushed in. In order to prevent manual inadvertent actuation from leading to increased wear and operational uncertainty, a pair of interacting rubbing surfaces (18, 19) is provided between the spring plunger (10) and a housing-affixed part (2) which provides an increased rubbing, or friction, between the spring plunger (10) and the housing-affixed part (2) shortly before an over-center snapping of the spring-switching mechanism (24, 25, 26) to thereby retard, or delay, a snapping movement of the spring plunger (10).