Ergonomic thumbwheel

Details Ergonomic thumbwheel Ergonomic thumbwheel

1995-02-24

1996-07-30

Bonck, Rodney H.

Machine element or mechanism

Control lever and linkage systems

Elements

74 10R, 200 11TW, 116307, 116309, H01H 1914, G05G 110

Patent

active

055401155

ABSTRACT:
The outside perimeter contact surface is molded with a continuously varying outer radius as measured relative to the axis of rotation and concentric circles of contrasting color disposed on the lateral surface of the thumbwheel with centers located at axis of rotation thereby providing visual and tactile feedback to the user of the character of output signal.

REFERENCES:
patent: 2713318 (1955-07-01), Paulstich
patent: 3999021 (1976-12-01), Delp
patent: 4890572 (1990-01-01), Huang
Product Engineering, "Right color plus dial shape minimizes operator errors", Apr. 25, 1966, pp. 84-85.
Product Engineering, Mar. 1951, p. 135.

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