Keyboard system and module therefor

Details Keyboard system and module therefor Keyboard system and module therefor

1983-10-19

1985-12-17

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 5A, 200317, H01H 1352

Patent

active

045594279

ABSTRACT:
A keyboard system comprises a circuit board having a matrix of contact switches. A module comprises a matrix of keys in actuating correspondence with the contact switches. The keys are of a resilient elongated form having at the terminus an upwardly projecting contact button and a pair of downwardly projecting pegs. One peg contacts a contact switch for actuation thereof. The other peg is receivable in a recess in the circuit board for maintaining alignment of the key. The module also forms a support for an overlying membrane wherein manual depressing of selective locations of the membrane actuates a corresponding contact switch.

REFERENCES:
patent: 3916150 (1975-10-01), Abernethy et al.
patent: 3978297 (1976-08-01), Lynn et al.
patent: 4360722 (1982-11-01), Georgopulos
Johnson, Jr., D. O.--IBM Technical Disclosure--vol. 13, No. 7, Dec., 1970--Keyboard with Changeable Encoding and Key Designation.

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