Automatic control of output reversal in slippable drives for transmitting torque

Claim 1

A LOAD HOIST COMPRISING A WINCH ADAPTED TO LIFT OR LOWER A LOAD DEPENDING UPON THE DIRECTION OF ROTATION OF ITS DRUM, A HYDROKINETIC TORQUE CONVERTER HAVING A TORQUE INPUT SHAFT AND A TORQUE OUTPUT SHAFT, MEANS TO DRIVE SAID WINCH DRUM FROM SAID TORQUE OUTPUT SHAFT IN A DIRECTION TO LIFT THE LOAD, AN INTERNAL COMBUSTION ENGINE CONNECTED TO SAID TORQUE INPUT SHAFT TO CONTINUOUSLY DRIVE THE SAME IN A DIRECTION TENDING TO LIFT THE LOAD, FUEL FEED MEANS CONNECTED TO SAID ENGINE TO CONTROL THE SPEED OF THE LATTER, A MANUAL REGULATOR TO REGULATE SAID FUEL FEED MEANS TO EFFECT LIFTING OF THE LOAD BY THE ENGINE WHEN THE ENGINE SPEED PROVIDES A TORQUE TRANSMISSION FOR SAID TORQUE CONVERTER EXCEEDING THE TORQUE REQUIRED TO LIFT THE LOAD AND TO PERMIT LOWERING OF THE LOAD BY GRAVITY WHEN THE ENGINE IDLES AND THE TORQUE TRANSMITTED BY SAID TORQUE CONVERTER IS INSUFFICIENT TO PREVENT REVERSE ROTATION OF SAID OUTPUT SHAFT BY THE LOAD THEREON, A SPEED SENSING DEVICE CONNECTED TO SAID OUTPUT SHAFT AND RESPONSIVE TO THE SPEED OF REVERSE ROTATION OF THE LATTER, AND MEANS CONNECTING SAID SPEED SENSING DEVICE TO SAID ENGINE FUEL FEED MEANS FOR AUTOMATICALLY INCREASING THE SPEED OF SAID ENGINE UPON A GIVEN REVERSE SPEED OF SAID OUTPUT SHAFT TO INCREASE THE BRAKING EFFECT OF SAID ENGINE AND TORQUE CONVERTER IN RESISTING GRAVITY ACCELERATION OF THE FALL OF THE LOAD, SAID MANUAL REGULATOR BEING CONSTRUCTED TO OVERRIDE SAID AUTOMATIC MEANS SO THAT THE LATTER IS OPERATIVE ONLY WHEN THE FUEL FEED SETTING OF SAID MANUAL REGULATOR IS BELOW THAT CALLED FOR BY SAID SPEED SENSING DEVICE.