Ergonomic thumb-actuated trackball combined with control switche

Details Ergonomic thumb-actuated trackball combined with control switche Ergonomic thumb-actuated trackball combined with control switche

1990-05-25

1992-06-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340710, 340711, G01V 904

Patent

active

051226545

ABSTRACT:
An ergonomically designed trackball cursor pointing device in which the cursor movement ball and function switches or buttons are respectively positioned to allow movement of the ball by the thumb while simultaneously operating the switches. More particularly, the switches are placed at the top of the trackball and the ball is placed at the side, to complement the natural placement of the thumb and fingers of the operator thereover.

REFERENCES:
patent: 4538476 (1985-09-01), Luque
patent: 4952919 (1990-08-01), Nippoldt
patent: 5021771 (1991-06-01), Lachman

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