Keyboard with versatile switch support structures

Details Keyboard with versatile switch support structures Keyboard with versatile switch support structures

1975-01-10

1976-06-08

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200153J, 200159R, 197 98, 235145R, B41J 508, H01H 300, H01H 1362, G06C 702

Patent

active

039625567

ABSTRACT:
A keyboard has contact pairs on a substrate and has a support with openings therein secured over and spaced from the substrate with the support openings aligned with respective contact pairs on the substrate. Switch mechanisms disposed in the support openings each have a contact member which is movable in a switch housing by a plunger between a depressed position and a retracted position and each switch housing has stop and detent means mounting the mechanism on a support opening so that the contact element bridges a substrate contact pair when the contact element is in depressed position. Some switch mechanisms have a cam on the housing and a cam follower on the plunger for holding the contact element in depressed position until released by manual movement of the plunger and other mechanisms cooperate with guide means mounted in adjacent support openings to mount bar-type key cap means.

REFERENCES:
patent: 3663780 (1972-05-01), Golbeck
patent: 3697713 (1972-10-01), Ohkita
patent: 3711685 (1973-01-01), Castle
patent: 3720801 (1973-03-01), Yanaga
patent: 3732386 (1973-05-01), Ohkita
patent: 3749859 (1973-07-01), Webb et al.
patent: 3749873 (1973-07-01), Harper et al.
patent: 3824362 (1974-07-01), Bury
patent: 3842229 (1974-10-01), Boulanger

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