Dome shaped switch member

• US 3,908,109 A
• Filed: 06/14/1974
• Issued: 09/23/1975
• Est. Priority Date: 06/14/1974
• Status: Expired due to Term

• Current Assignee: Nationsbank NA (Bank of America Corp.)
• Original Assignee: Thomas J. Studebaker
• Inventors: Studebaker, Thomas J.
• Primary Examiner(s): Schaefer, Robert K.
• Assistant Examiner(s): Smith, William J.
• Application Number:
  US05/479,429
• Time in Patent Office: 466 Days
• Field of Search: 200/159B,239,275,67D,67DB,159A,159R,83B,83N,83P
• US Class Current: 200/275
• CPC Class Codes: H01H 13/48 using buckling of disc springs
• CPC Class Codes: H01H 2227/026 Separate dome contact

Abstract

A dome shaped element which is used as a switch member in a keyboard switch assembly consists of a hollow, geometric solid having an open circular base with a plurality of planar side walls extending from the base. The side walls are joined by an arcuate surface and arcuate feet members join segments of the arcuate surface to the adjacent side walls. The feet are bent angularly to the plane of the arcuate surface.

Claims

1. A dome element for use as a switch member, said dome element comprising an open circular base, a plurality of planar side walls, each of said planar side walls extending from a segment of said open circular base at equal angles thereto, an arcuate surface interconnecting said side walls and a plurality of arcuate corners angled downwardly from a tip of said arcuate surface, each of said arcuate corners interconnecting said tip of said arcuate surface with an adjacent pair of said planar side walls.

2. The dome element recited in claim 1, said arcuate surface being spherical.