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

1980-10-06

1982-07-06

Shepperd, John W.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 5A, 200340, H01H 1370

Patent

active

043385028

ABSTRACT:
An upper member of a housing and a plurality of key actuators are unified into a single flat sheet made of stainless steel. The respective key actuators are made movable by providing a "U" shaped slot and a hinge at the corresponding limited regions of the stainless steel sheet. The hinge and key indicia are formed at the same time by a half etching step. 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: 3627927 (1971-12-01), Schmitz
patent: 3627935 (1971-12-01), Spievak
patent: 4249054 (1981-02-01), Komaki

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