Keyboard having low profile modular keys

Details Keyboard having low profile modular keys Keyboard having low profile modular keys

1982-10-21

1986-01-07

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200153J, 200159B, 200314, 200340, H01H 1370

Patent

active

045635501

ABSTRACT:
A contact keyboard comprising a plurality of modular keys individually insertable in a base frame having feet adjustable in height in order to permit a variable inclination of the key plane. The majority of the keys are of the dash actuation type, in which an actuator resiliently deforms a metallic lamina urging it from a stable configuration with opened contacts to an unstable configuration in which an electric contact is established between two parts of an electrical circuit. A group of keys is of the bistable type, in which a cam allows the actuator to stably position itself in one of two possible closed/open positions and in which the actuation is signalled by the illumination of a lamp inside the key.

REFERENCES:
patent: 3663780 (1972-05-01), Golbeck
patent: 3770923 (1973-11-01), Habecker
patent: 4096368 (1978-06-01), Grebner
patent: 4367383 (1983-01-01), Sommansson

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