04378478 is referenced by 17 patents and cites 7 patents.

A double-domed elastomeric keyboard element is disclosed in which a solid contact disc is connected to the junction of the domes of the keyboard element housing. The inner dome is provided on its inside with a downwardly extending projection which engages the contact disc when the keyboard element is depressed to press the disc against a pair of conductors on a printed circuit board below the element. Because of the non-positive connection between the key plunger and the conductors, the contact pressure is almost equal to the operating force.

Title
Double-domed elastomeric keyboard element
Application Number
6/296628
Publication Number
4378478
Application Date
August 27, 1981
Publication Date
March 29, 1983
Inventor
Reinhard Deeg
Keltern
DE
Agent
William J Michals
James B Raden
Assignee
International Standard Electric Corporation
NY, US
IPC
H01H 13/70
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