Abstract: A brush presses against the commutator of a machine, slidably movable within a brush holder, and an arm operatively associated with a switch has a roller in rolling contact with a side of the brush through an opening of the holder, such that upon sufficient wear of the brush, a resilient spring urges the roller over the trailing end of the brush to operate the switch to complete a current path.

Abstract: The invention is concerned with an improvement in a motor-pump assembly for operating a hydraulic implement, said assembly including a hydraulic pump for controlling flow of a hydraulic fluid to said hydraulic implement and an electric motor for driving said pump. The improvement comprises means for coaxially aligning a driving shaft of the motor with the driven shaft of the pump, means for directly drivingly engaging said driving shaft with said driven shaft and means for fixing said pump to said motor. The invention is particularly concerned with the case wherein said hydraulic implement comprises a hydraulic lift cylinder for adjusting the height of a fork carrying carriage of a lift truck, controlling the tilt of the lift truck mast and controlling power steering functions.