Keyswitch pad

Details Keyswitch pad Keyswitch pad

1976-09-01

1978-08-22

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200 5R, 200 83B, 200159R, 200302, 200314, 340365A, H01H 920, H01H 1350

Patent

active

041091183

ABSTRACT:
The keyswitch pad includes a plurality of keyswitches on a common backing member, each of the keyswitches including a fluid filled bag underneath a key cap. The bags of the keyswitches are interconnected and the system of bags is closed so as to be of limited volume so that only one keyswitch at a time can be depressed. Several different types of keyswitches can be used in any one switch pad and several types of switching, latching, and display mechanisms are disclosed for the keyswitches.

REFERENCES:
patent: 2800034 (1957-07-01), Seeger
patent: 3268673 (1966-08-01), Bilek
patent: 3304386 (1967-02-01), Shlesinger, Jr.
patent: 3805939 (1974-04-01), Ross
patent: 3846596 (1974-11-01), Wolf
patent: 3911233 (1975-10-01), Nakumura et al.
patent: 4032728 (1977-06-01), Oelsch
Cook, S. D., et al.; IBM Tech. Disc. Bull,; Key Matrix Using a Fluid Medium; vol. 13, No. 3, Aug. 1970; p. 744.
Easton, R. C.; IBM Tech. Disc. Bull.; Hydraulically Controlled Keyboard Interlock Mechanism; vol. 14, No. 8, Jan. 1972, p. 2540.

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