Servo device, especially for reversible gears in motorboats

Machine element or mechanism – Gearing – Follow-up mechanism

Patent

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Details

74404, 74417, F16H 3500

Patent

active

041910630

ABSTRACT:
A servo device is disclosed intended for amplifying the force in a mechanical control apparatus, movable in two opposite directions when said apparatus is displaced in either direction, comprising two gears rotatably disposed in a housing and coaxial with a rotatable shaft. The gears are driven in counter-rotation by a conical pinion or by two counter-rotating cylindrical pinions in driving relation to a rotatable servo motor. A nut is screwably arranged on screw splines on the shaft between the gears. When screwed along said splines, the nut comes into frictional contact via annular friction surfaces with corresponding annular surfaces on the gears. The nut, the splines and one of the gears make a releasable driving connection with each other. Radially directed arms are attached to the shaft and the nut with control cable attachment means for transmitting the input operating force to one arm while an additional force is contributed from either gear via the shaft and splines to the other arm.

REFERENCES:
patent: 3766794 (1973-10-01), Wilcox
patent: 4016825 (1977-04-01), Pichl

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