Metallic housing for an electronic apparatus with a flat keyboar

Details Metallic housing for an electronic apparatus with a flat keyboar Metallic housing for an electronic apparatus with a flat keyboar

1979-02-28

1981-02-03

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Time delay

200340, H01H 312

Patent

active

042490545

ABSTRACT:
An upper member of a housing and a plurality of key actuators are unified into a single flat sheet made by stainless steel. The respective ones of the key actuators are made movable by reducing the thickness of the corresponding limited regions of the stainless steel sheet. When a particular one of the key actuators is actuated, a movable contact on a conductive silicon rubber sheet will come into contact with a stationary contact on a circuit board.

REFERENCES:
patent: 440813 (1890-11-01), Von Kohler
patent: 2086066 (1937-07-01), Churchill
patent: 3627935 (1971-12-01), Spievak
patent: 3643041 (1972-02-01), Jackson
patent: 3843851 (1974-10-01), Harada et al.
patent: 3860771 (1975-01-01), Lynn et al.
patent: 4066860 (1978-01-01), Kawasaki

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