Hydrostatic transmission control

摘要

A speed control assembly is provided particularly for use in controlling the position of a hydrostatic transmission. An operator controlled lever is mounted for rotation about a shaft, and a portion of the lever is mounted for linear reciprocation with respect to the shaft. The shaft includes a disc cooperating with an annular electromagnet, the electromagnet when energized acting on the disc to latch the shaft so that it cannot be moved. When the control lever portion is reciprocated with respect to the shaft, the electromagnet is de-energized and the shaft may be rotated to act through a lever assembly to control the position of a hydrostatic transmission. Electric switches are mounted responsive to the driver's seat occupancy and to application of the brakes so that if the driver's seat is vacated or the brakes are applied the electromagnet is de-energized. When the electromagnet is de-energized, springs bias the control lever to a neutral position.