Balancing machine

Claim 1

IN A TWO PLANE BALANCING MACHINE INCLUDING A PAIR OF TRANSDUCERS, ELECTRONIC MEANS FOR PLANE SEPARATION, MIXER MEANS COUPLED TO THE OUTPUT OF EACH OF SAID TRANSDUCER, MEANS FOR FEEDING SIGNALS FROM SAID TRANSDUCERS AND SAID PLANE SEPARATION MEANS TO SAID MIXER MEANS, A PAIR OF REFERENCE GENERATORS FOR DETERMINING THE ANGULAR POSITION OF UNBALANCE, EACH ADAPTED TO HAVE ITS ROTOR MECHANICALLY DRIVEN IN SYNCHRONISM WITH THE PIECE TO BE BALANCED, EACH GENERATOR HAVING A MOVABLE STATOR, MEANS FOR COMBINING THE OUTPUT OF EACH OF SAID MIXER MEANS AND ITS CORRESPONDING REFERENCE GENERATOR, AND METER MEANS FOR INDICATING THE AMPLITUDE OF SIGNALS FROM SAID COMBINING MEANS, THE IMPROVEMENT COMPRISING, FIRST INDICIA MEANS MOVABLE WITH EACH STATOR AND HAVING A REFERENCE MARK THEREON, SECOND INDICIA MEANS MOUNTED ADJACENT SAID FIRST INDICIA MEANS AND MECHANICALLY COUPLED TO THE GENERATOR ROTORS, SAID SECOND INDICIA MEANS HAVING REFERENCE MARKS THEREON WHICH ALIGN WITH THE REFERENCE MARKS ON SAID FIRST INDICIA MEANS ONCE FOR EACH REVOLUTION OF SAID GENERATORS, SAID SECOND INDICIA MEANS BEING RELEASABLY COUPLED TO SAID ROTORS WHEREBY THE REFERENCE MARKS THEREON MAY BE ROTATED RELATIVE TO SAID ROTORS, AND AN AMPLITUDE ADJUSTING NETWORK CONNECTED BETWEEN EACH SAID MIXER MEANS AND SAID METER MEANS, EACH OF SAID NETWORK COMPRISING AN UNBALANCE ATTENUATOR AND A CALIBRATION ATTENUATOR WHEREIN SAID UNBALANCE ATTENUATOR IS PROVIDED WITH INDICIA FOR INDICATION ITS SETTING.