Infinite-ratio driving interlock for yarder

Claim 1

AN INTERLOCKING YARDER FOR USE WITH A TAIL BLOCK FOR SPOOLING THE MAIN AND THE HAUL-BACK ENDS OF A CABLE STRUNG THROUGH SAID BLOCK, COMPRISING: A RESPECTIVE SPOOLING DRUM FOR EACH OF SAID CABLE ENDS, A POWER PLANT, A DRIVING CONNECTION BETWEEN THE POWER PLANT AND ONE OF SAID SPOOLING DRUMS, A DRIVING CONNECTION INCLUDING A SUM GEAR, PLANETARY GEARS, AND SPIDER OF A PLANETARY GEAR SYSTEM BETWEEN THE POWER PLANT AND THE OTHER OF SAID SPOOLING DRUMS, THE PLANETARY GEARS BEING MESHED BY A GEAR WHEEL DRIVEN FROM THE POWER PLANT, THE SUN GEAR BEING FIXED TO THE OTHER SPOOLING DRUM, THE SUN GEAR AND THE GEAR WHELL COMPRISING THE OUTPUT AND INPUT END, RESPECTIVELY, OF THE PLANETARY GEAR SYSTEM, AND POWERDRIVEN MEANS INDEPENDENT OF SAID LAST-NAMED DRIVE CONNECTION MADE FUNCTIONAL TO THE SPIDER COMPONENT OF THE PLANETARY GEAR SYTEM FOR EITHER INCREASING OR DECREASING, AT WILL, THE RATIO BETWEEN THE SPEEDS AT WHICH THE INPUT AND OUTPUT ENDS OF THE PLANETARY GEAR SYSTEM TURN, SAID INDEPENDENT POWER-DRIVEN MEANS COMPRISING A REVERSIBLE HYDRAULIC MOTOR, THE FLUID SYSTEM FOR SAID HYDRAULIC MOTOR SELECTIVELY CAUSING A HYDRAULIC LOCK TO BE ESTABLISHED UPON THE HYDRAULIC MOTOR FOR RESPONSIVELY HOLDING SAID SPIDER IN AN ARRESTED CONDITION.