ROCKER ARM SWITCH

• US 3,564,172 A
• Filed: 12/30/1968
• Issued: 02/16/1971
• Est. Priority Date: 12/30/1968
• Status: Expired due to Term

• Current Assignee: Alfred Laakso
• Original Assignee: Alfred Laakso
• Inventors: Laakso, Alfred
• Application Number:
  US04/787,446
• Time in Patent Office: 778 Days
• US Class Current: 200/557
• CPC Class Codes: H01H 23/12 Movable parts; Contacts mounted thereon
• CPC Class Codes: H01H 23/20 having snap action

Abstract

An improved pileup switch assembly wherein a hairpin spring maintains a pileup position for each switch position.

Claims

1. In a pileup switch having a frame, a fingertip operated rocker arm pivotally mounted on said frame and having stop positions on either side of the pivot point thereof, a lever arm dependent from said rocker arm, the end of which moves in a minor arc the limits of which on either side of a dead center position are proscribed by said stop positions, two sets of normally open electrical contact strips, one on either side of said dead center position and adapted to be placed in a closed position when said lever arm is positioned thereagainst;

a hairpin spring adapted to so position said lever arm alternately against one or the other of said electrical contact strips;

comprising a generally Ushaped hairpin spring one end of which is attached to said frame in a position below the end of said lever arm and the other end of which is attached to the end of said lever arm, and a pivot attached to said frame at a point generally in line with said minor arc and to one side of said dead center, said hairpin spring passing thereabout and being pivotally retained by said pivot, said hairpin spring being effective to snap said lever over to said stop position in the direction of movement of said lever arm past said dead center.