Snap disc keyboard

Details Snap disc keyboard Snap disc keyboard

1982-03-15

1984-02-07

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200275, H01H 1370

Patent

active

044305311

ABSTRACT:
A metal snap disc type keyboard is disclosed having a plurality of snap discs each with a central domed portion and a peripheral foot portion. The discs are fastened together in strips to a common mounting strap having locating holes to facilitate assembly. The strips of snap discs are mounted to a printed circuit board that has corresponding conductors, and a resilient sheet is placed over this assembly. The resilient sheet provides additional key travel and cushions the harshness of the snap of the snap discs. These components are fastened into a top case in which keys are hingedly mounted for actuating the individual snap domes.

REFERENCES:
patent: 3819882 (1974-06-01), Anderson et al.
patent: 3916135 (1975-10-01), Holden et al.
patent: 3941953 (1976-03-01), Misson et al.
patent: 4096364 (1978-06-01), Lynn et al.
patent: 4195210 (1980-03-01), Pounds et al.
patent: 4254309 (1981-03-01), Johnson

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