Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1991-03-07
1992-08-04
Braun, Leslie A.
Machine element or mechanism
Control lever and linkage systems
Elements
G05G 108
Patent
active
051348985
ABSTRACT:
A tactile feedback apparatus, such as for a rotary optoelectronic motion encoder switch, has a ball that successively engages indentations in the surface of a hub. The ball is biased against the hub in a direction at an angle to the perpendicular to the surface by an angled leaf spring. The indentations in the hub are sufficiently deep so that the ball does not contact the floor of any indentation. As the hub wears, the spring inwardly biases the ball to contact the hub at a progressively decreasing radius. Consequently, the useful life of the apparatus is extended, and performance does not significantly degrade during the useful life.
REFERENCES:
patent: 2840672 (1958-06-01), Martin
patent: 3059497 (1962-10-01), Eadie
patent: 3096665 (1963-07-01), Cappelle et al.
patent: 3560672 (1971-02-01), Ludlum et al.
patent: 4071720 (1978-01-01), Krajci et al.
patent: 4920818 (1990-05-01), Nagano
Product brochure--"Bourns Slimline Potentiometers".
Product brochure--"Noble Rotary Encoded Switch Series SDB161".
Product brochure--"Optically Coupled Rotary Encoder Switch".
Product brochure--"Standard Grigsby--We Switch The World".
Article entitled "Long Lived Devices Offer High Resolution", by Doug Conner, Electronics Design News Magazine (EDN), Apr. 26, 1990.
Braun Leslie A.
Hewlett--Packard Company
Massey Ryan W.
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