Key operated printed circuit switch

Details Key operated printed circuit switch Key operated printed circuit switch

1985-12-20

1987-11-17

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 5A, 200340, 200250, 200290, H01H 124, H01H 150, H01H 1300

Patent

active

047075783

ABSTRACT:
A key operated switch for keyboards having a layer type construction of key support carrying printed circuits arranged to facilitate fully automatic production of keyboards. Further, 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. The simple and hence inexpensive manufacture of a keyboard utilizing the key operated switches causes no loss of operating quality.

REFERENCES:
patent: 3870840 (1975-03-01), Rivetta et al.
patent: 4029916 (1977-06-01), Chu
patent: 4084071 (1978-04-01), Smith
patent: 4099037 (1978-07-01), Hartzler et al.
patent: 4138604 (1979-02-01), Harmsen et al.
patent: 4243852 (1981-01-01), Larson
patent: 4341934 (1982-07-01), Muller
patent: 4398074 (1983-08-01), Danielson et al.
patent: 4400596 (1983-08-01), Fukukura et al.
patent: 4480937 (1964-11-01), Eckhardt
patent: 4608465 (1986-08-01), Harada

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