Apparatus and method for detecting and compensating for roll deflection on a rollingmill

Claim 1

APPARATUS FOR DETECTING AND CORRECTING DEFLECTION OF A ROLL OF A MILL FOR ROLING METALS, SAID DEFLECTION OF THE ROLL BEING IN A DIRECTION WITH AND OPPOSITE TO THE DIRECTION OF TRAVEL OF METAL THROUGH SAID MILL, SAID ROLL ENGAGING METAL ROLLED ON SAID MILL AND BEING DRIVEN BY TENSION APPLIED TO SAID METAL BY AT LEAST ONE OF WINDING AND UNWINDING REELS AND BY AT LEAST ONE BACKING ROLL IN FRICTIONAL ENGAGEMENT THEREWITH, COMPRISING MEANS FOR DIRECTING AND IMPINGING A MEDIUM OF A GIVEN STRENGTH UPON A FACE OF SAID ROLL, SAID DIRECTING AND IMPINGING MEANS BEING SPACED FROM SAID ROLL FACE A DISTANCE SUFFICIENT TO FORM A RELATIVELY SMALL GAP THEREBETWEEN ACROSS WHICH SAID MEDIUM TRAVELS FROM SAID DIRECTING AND IMPINGING MEANS TO SAID ROL FACE, THE POSITION OF THE DIRECTING AND IMPINGING MEANS RELATIVE TO THE ROLL FACE BEING SUCH THAT DEFLECTION OF THE ROLL IS TOWARD AND AWAY FROM THE DIRECTING AND IMPINGING MEANS AND SHORTENS AND LENGTHENS SAID GAP AND BEING SUCH THAT DEFLECTION OF SAID ROLL PRODUCES A CHANGE IN THE STRENGTH OF SAID MEDIUM, MEANS CONNECTED TO SAID DIRECTING AND IMPINGING MEANS FOR DETECTING SHORTENING AND LENGTHENING OF SAID GAP BY SENSING THE CHANGE IN THE STRENGTH OF THE MEDIUM, MEANS CONNECTED TO SAID SENSING MEANS FOR GENERATING FROM SAID CHANGE IN STRENGTH AN IMPULSE WHICH HAS A MAGNITUDE PROPORTIONAL TO THE AMOUNT OF DEFLECTION OF SAID ROLL, MEANS CONNECTED TO SAID IMPULSE GENERATING MEANS FOR TRANSMITTING SAID IMPULSE TO AT LEAST ONE OF A PLURALITY OF MOTORS WHICH IMPART DRIVING FORCE TO SAID ROLL THROUGH TENSION APPLIED TO SAID METAL BY AT LEAST ONE OF WINDING AND UNWINDING REELS AND THROUGH TORQUE APPLIED TO AT LEAST ONE BACKING ROLL FOR SAID ROLL, SAID TRANSMITTING MEANS INCLUDING MEANS FOR PROVIDING FROM SAID IMPULSE A BUCK-BOOST OUTPUT ARMATURE VOLTAGE FOR AT LEAST ONE OF SAID MOTORS TO CONTROL OPERATION THEREOF FOR MAINTAINING SAID GAP AT A SUBSTANTIALLY CONSTANT LENGTH.