Key operated switch for keyboard

Details Key operated switch for keyboard Key operated switch for keyboard

1986-10-03

1987-12-15

Phillips, Charles E.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 5A, 200292, 200340, 200250, H01H 1352

Patent

active

047135077

ABSTRACT:
A key operated switch for keyboards having an improved layer type construction comprising a key carrier and key return spring supporting printed circuit conductors and contacts so arranged as to facilitate fully automatic production of keyboards. The simple formation of a leaf spring, a key guide and the key stem comprising the switch enables these parts also to be assembled by machine, making the manufacture of a keyboard simple and inexpensive.

REFERENCES:
patent: 4029916 (1977-06-01), Chu
patent: 4084071 (1978-04-01), Smith
patent: 4341934 (1982-07-01), Muller
patent: 4365408 (1982-12-01), Ditzig
patent: 4370533 (1983-01-01), Kamei et al.

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