Backlash and runout compensator for lead screw drives

Details Backlash and runout compensator for lead screw drives Backlash and runout compensator for lead screw drives

1980-05-22

1983-07-12

Wright, Jr., Ernest T.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-feed mechanism

744148A, 74441, B41J 1920

Patent

active

043927572

ABSTRACT:
Disclosed is drive apparatus especially useful for controllably displacing the carrier of a printer, the drive apparatus including a lead screw having laterally spaced apart and floating threaded followers thereon. Intermediate the threaded followers are a first pair of preloaded springs which press the followers against the opposite flanks of the threads on the lead screw to thereby inhibit backlash intermediate the followers. A second pair of springs are mounted intermediate a bracket, which is fastened to the carrier, and at least one of the followers for effecting coupling between the carrier and the follower while controlling backlash therebetween. A pair of arms extend from the followers and are coupled to a restraining shaft in such a manner as to inhibit rotational movement of the arms (and thus the followers) while permitting motion of the followers in any perpendicular direction to the lead screw to accommodate runout or eccentricity.

REFERENCES:
patent: 641916 (1900-01-01), Wright
patent: 2903902 (1959-09-01), Berggren
patent: 3094011 (1963-06-01), Bradley
patent: 3119307 (1964-01-01), Opferkuch
patent: 3382731 (1968-05-01), Whicker
patent: 3563107 (1971-02-01), Nilsson
patent: 3703835 (1972-11-01), O'Connor et al.
patent: 3713349 (1973-01-01), Benson
patent: 3945481 (1976-03-01), Lindberg
patent: 3977262 (1976-08-01), Randolph
patent: 4071866 (1978-01-01), Butsch
Product Engineering, "Eliminating Backlash", Honegger, Jul. 1939, pp. 302-303, 74/441.

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