Cursor control accessory for a computer keyboard

Details Cursor control accessory for a computer keyboard Cursor control accessory for a computer keyboard

1988-04-14

1989-04-25

Envall, Jr., Roy N.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

273DIG28, 235145R, 340709, H01H 1370, H01H 2500

Patent

active

048250198

ABSTRACT:
A cursor control accessory is shown as an integral base overlying an array of keys including independently movable cursor control keys. It is provided with a protruding handle for use as a joystick. Outwardly protruding walls are adapted to be freely located between keys in the array and engage the upper surface of the keyboard housing. Recessed key engaging surfaces are provided above each cursor control key and are adapted to depress the selected cursor control key or keys in response to rocking movement of the base relative to the keyboarding housing. Base areas located above non-functional keys are recessed inwardly or relieved to prevent key operation during cursor usage.

REFERENCES:
patent: 3950634 (1976-04-01), Speiser
patent: 4029915 (1977-06-01), Ojima
patent: 4256931 (1981-03-01), Palisek
patent: 4386776 (1983-06-01), Bromley
patent: 4493219 (1985-01-01), Sharp et al.
patent: 4520240 (1985-05-01), Swindler
patent: 4575591 (1986-03-01), Lugaresi
IBM Technical Disclosure Bulletin, vol. 28, No. 5, Oct. 1985, p. 1859.

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