Plural stand, plural motor tension regulating apparatus

Claim 1

IN A CONTROL SYSTEM FOR APPARATUS OPERATING AN ALONGATE MATERIAL WHEREIN THE MATERIAL PASSES FROM A FEED STATION THROUGH AN OPERATING STATION TO A RECEIVING STATION, AND WHEREIN SAID OPERATING STATION HAS OPERATING MEANS WHICH DRIVES THE MATERIAL SO THAT IT IS DRAWN FROM THE FEED STATION AND FORCED TOWARD THE RECEIVING STATION, AND WHEREIN EACH OF THE FEED AND RECEIVING STATIONS INCLUDES CONTROLLABLE DYNAMOELECTRIC MACHINE MEANS FOR APPLYING TENSION BETWEEN THAT STATION AND THE OPERATING STATION, MEANS FOR REGULATING THE TENSION OF THE MATERIAL ON BOTH SIDES OF THE OPERATING STATION COMPRISING A NETWORK RESPONSIVE TO THE DRIVE SPEED IMPARTED TO THE MATERIAL BY THE OPERATING STATION, MEANS RESPONSIVE TO SAID NETWORK FOR DERIVING FIRST AND SECOND OPPOSITELY SENSED SIGNALS PROPORTIONAL TO THE RATE OF RATE OF CHANGE OF SAID SPEED, FIRST AND SECOND PROPORTIONAL INTEGRATOR MEANS, EACH HAVING INPUT MEANS AND OUTPUT MEANS, MEANS INCLUDING MEANS RESPONSIVE TO THE TENSION ON THE MATERIAL BETWEEN SAID FEED STATION AND SAID OPERATING STATION FOR SUPPLYING TO THE INPUT MEANS OF SAID FIXED PROPORTIONAL INTEGRATING MEANS A FIRST INPUT EXCITATION COMPONENT WHICH IS A FUNCTION OF THE DIFFERENCE BETWEEN ACTUAL AND DESIRED TENSION ON THE MATERIAL BETWEEN THE FEED AND OPERATING STATIONS, MEANS FOR APPLYING SID FIRST SIGNAL TO THE INPUT MEANS OF SAID FIRST PROPORTIONAL INTEGRATING MEANS IN A SENSE TO AID SAID FIRST EXCITATION COMPONENT,