Patent ID: 6978858

Claim:
A control apparatus for controlling movement of a hydraulic actuator of a hydraulic control system, comprising: a geared transmission adapted to be connectable to a support member and having rotatable input and output shafts, said transmission having a speed ratio equal to a ratio of output shaft to input shaft speed of rotation, said speed ratio being greater than 1:1; a manually operated steering wheel supportedly connected to, and substantially freely rotatable with, said input shaft; a rotatably actuated voltage generator having a rotatable input shaft operably connected to said output shaft whereby rotation of said steering wheel produces a low current d.c. voltage, output of said voltage generator for controlling movement and positioning of the hydraulic actuator, said d.c. voltage output being proportional only to the speed of rotation of said steering wheel, and having a polarity (+/−) determined by direction of rotation of said steering wheel.