Driving mechanism for textile machines

Claim 1

IN A DRIVE MECHANISM FOR A TEXTILE MACHINE; A YARN COLLECTING BEAM AND A SHAFT ON WHICH SAID BEAM IS MOUNTED; ROTARY POWER MEANS; AN ELECTROMAGNETIC CLUTCH HAVING A DRIVE MEMBER, A DRIVEN MEMBER AND AN ELECTRICAL COIL FOR CONTROLLING THE COUPLING BETWEEN SAID DRIVE MEMBER AND SAID DRIVEN MEMBER, THE OUTPUT TORQUE OF SAID CLUTCH BEING A FUNCTION OF THE CURRENT THROUGH SAID COIL; A VARIABLE SPEED DEVICE HAVING INPUT MEANS, OUTPUT MEANS AND REGULATING MEANS; A ROTARY SPEED DIFFERENTIAL DEVICE HAVING FIRST AND SECOND INPUT MEANS AND OUTPUT MEANS; MEANS CONNECTING SAID ROTARY POWER MEANS TO SAID CLUTCH DRIVE MEMBER, MEANS CONNECTING SAID ROTARY POWER MEANS TO SAID FIRST INPUT MEANS OF SAID SPEED DIFFERENTIAL DEVICE; MEANS CONNECTING SAID CLUTCH DRIVEN MEMBER TO SAID INPUT MEANS OF SAID VARIABLE SPEED DEVICE; MEANS CONNECTING SAID CLUTCH DRIVEN MEMBER TO SAID SECOND INPUT MEANS OF SAID SPEED DIFFERENTIAL DEVICE; MEANS CONNECTING SAID OUTPUT MEANS OF SAID SPEED DIFFERENTIAL DEVICE TO SAID REGULATING MEANS OF SAID VARIABLE SPEED DEVICE; MEANS CONNECTING SAID OUTPUT MEANS OF SAID VARIABLE SPEED DEVICE TO SAID YARN COLLECTING BEAM SHAFT; AND ELECTRICAL RESISTANCE MEANS COUPLED TO SAID SPEED DIFFERENTIAL DEVICE FOR VARYING THE VOLTAGE APPLIED ACROSS CLUTCH COIL FOR VARYING THE CURRENT THROUGH SAID CLUTCH COIL, SAID LASTNAMED MEANS INCLUDING A CONTROL RHEOSTAT HAVING A CONTROL SHAFT AND MEANS COUPLING SAID SHAFT OF SAID CONTROL RHEOSTAT TO THE REGULATING MEANS OF SAID VARIABLE SPEED DEVICE, THEREBY TO VARY SAID CONTROL RHEOSTAT IN RESPONSE TO CHANGES IN SAID REGULATING MEANS.