Trim linkage

Machine element or mechanism – Control lever and linkage systems – Multiple controlling elements for single controlled element

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Details

74522, 74834, 251233, 431 76, G05G 1100, G05G 1300

Patent

active

046497676

ABSTRACT:
A mechanical proportioning trim execution device in the general configuration of a four-bar linkage including input and output levers coupled by a connecting link, with the input lever having its length determined by a movable pivot automatically adjusted by a gear motor to produce the trim function. The movable pivot advances or retracts along a path which is highly skewed to the line of the input lever in a manner such that the path is perpendicular to the connecting link at zero input displacement for minimum trim effect and is parallel to the connecting link at full input displacement for maximum trim effect.

REFERENCES:
patent: 865784 (1907-06-01), Kolstram
patent: 1844415 (1932-02-01), Wilhjelm
patent: 2022511 (1935-11-01), Lewis
patent: 2834218 (1958-05-01), Lovell
patent: 2863500 (1958-12-01), Schumann
patent: 3013437 (1961-12-01), Harding
patent: 3103829 (1963-09-01), Basford
patent: 3330477 (1967-07-01), Stephens
patent: 3352167 (1967-11-01), Winters
patent: 4150939 (1979-04-01), Hayes
patent: 4286474 (1981-09-01), McMahon, Jr.
patent: 4486166 (1984-12-01), Nelson et al.

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