Rotor balancing device

Claim 1

IN A METHOD OF DYNAMICALLY BALANCING A PIECE OF ROTATING EQUIPMENT IN WHICH A REFERENCE MARK IS ARBITRARILY PLACED ON SAID EQUIPMENT, A VIBRATION PICK-UP ANALYZER IS ATTACHED TO THE BEARING HOUSING OF SUCH EQUIPMENT, A PAIR OF EQUAL COUNTERWEIGHTS W ARE PLACED 180* APART ON SAID EQUIPMENT, AND THE AMPLITUDE AND PHASE OF UNBALANCE WHILE IN ROTATION ARE RECORDED ON A VECTOR DIAGRAM AS O, THE IMPROVEMENT WHEREIN AN ARTICULATED PARALLELOGRAM HAVING A SCALE POINTER EXTENDING DIAGONALLY THEREOF WITH ONE END PIVOTALLY CONNECTED AT ONE VERTEX OF THE PARALLELOGRAM AND THE OTHER END LONGITUDINALLY SLIDABLE AT THE DIAGONALLY OPPOSED VERTEX IS USED TO DETERMINE VARIOUS ANGLES BETWEEN SUCH COUNTERWEIGHTS AND TO LOCATE THE MIDPOINT THEREBETWEEN, SUCH METHOD COMPRISING: (A) ADJUSTING SUCH COUNTERWEIGHTS TO A POSITION 120* APART, USING THE SCALE POINTER OF THE ARTICULATED PARALLELOGRAM TO LOCATE THE MIDPOINT BETWEEN THE COUNTERWEIGHTS, AND MARKING SAID MIDPOINT ON SAID EQUIPMENT, (B) ROTATING SAID EQUIPMENT AND OBSERVING AND RECORDING THE AMPLITUDE AND PHASE OF THE NEW UNBALANCE AS R, (C) COMPLETING THE VECTOR DIAGRAM, T, BETWEEN O AND R, AND DETERMINING THE AMOUNT OF THE BALANCING WEIGHT BY THE EQUATION, O/TX PERCENT W=BALANCING WEIGHT, (D) USING THE ARTICULATED PARALLELOGRAM TO DETERMINE THE ANGLE AT WHICH THE COUNTERWEIGHTS MUST BE PLACED TO EQUAL THE WEIGHT FOUND IN STEP (C) ABOVE, AND (E) DETERMINING THE NEW LOCATION OF THE COUNTERWEIGHT SETTING BY MEASURING THE ANGLE AND DIRECTION OF O TO T IN THE VECTOR DIAGRAM, FINDING THE POINT ON THE EQUIPMENT IN THIS DIRECTION AND ANGLE FROM THE POINT FOUND IN STEP (A) ABOVE, AND SETTING THE POINTER OF THE ARTICULATED PARALLELOGRAM AT THE NEW LOCATION POINT AND ADJUSTING THE ARTICULATED PARALLELOGRAM TO THE ANGLE FOUND IN STEP (D) ABOVE TO DETERMINE THE NEW LOCATION OF THE CORRECTION WEIGHTS.