Speed change device

Details Speed change device Speed change device

1980-06-23

1982-07-20

Husar, C. J.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

F16H 906, F16H 712

Patent

active

043403778

ABSTRACT:
Complementary relatively stationary pulleys having axially oppositely stepped diameter portions form a variable speed drive between a motor coupled with one stepped pulley and a driven device coupled with the oppositely stepped pulley such as the spindle of a drill press on which the device is mounted. A transmission belt for the stepped pulleys is bodily shifted with an associated belt tensioning idler pulley, a belt shaper guide, and a compression belt former selectively to position the belt in alignment with chosen diameter portions of the two stepped pulleys to effect a desired speed change while the belt is in a deformed state out of contact with the stepped pulleys, following which the belt is retensioned to engage it with the chosen stepped portions of the complementary stepped pulleys.

REFERENCES:
patent: 1374109 (1921-04-01), Pierle
patent: 1469856 (1923-10-01), Traufler
patent: 1620214 (1927-03-01), Klausmeyer
patent: 2263438 (1941-11-01), Garvin
patent: 2504529 (1950-04-01), Isom
patent: 2783655 (1957-03-01), Meckoski
patent: 3062065 (1962-11-01), Shaw
patent: 3216266 (1965-11-01), Sunnen
patent: 3762229 (1973-10-01), Johnson
patent: 3848448 (1974-11-01), Allen
patent: 3979964 (1976-09-01), McCordall

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