Scales

Claim 1

IN AN ELECTROMAGNETIC BALANCE HAVING A STATIONARY FRAME, AND MEMBER PIVOTALLY SUPPORTED ON SAID FRAME, A FORCE RECEIVING SURFACE OPERATIVELY CONNECTED TO SAID MEMBER, SAID MEMBER BEING MOVABLE IN OPPOSITE DIRECTIONS WITH RELATION TO AN AVERAGE POSITION, A FORCE PRODUCING MAGNETIC COIL COMPRISING RELATIVELY MOVABLE COIL AND ARMATURE ELEMENTS, ONE OF SAID COIL AND ARMATURE ELEMENTS BEING MOUNTED FROM SAID FRAME, AND THE OTHER OF SAID COIL AND ARMATURE ELEMENTS BEING SUPPORTED FROM SAID MEMBER FOR MOVEMENT THEREWITH, THE COMBINATION OF ELECTRICAL OPERATING AND CONTROL DEVICES FOR SAID BALANCE COMPRISING AN ELECTRIC DETECTOR DEVICE SENSITIVE TO ANY DISPLACEMENT OF THE PIVOTED MEMBER IN ONE DIRECTION FROM SAID AVERAGE POSITION UNDER THE INFLUENCE OF AN ADDED INCREMENT OF FORCE TO PRODUCE AN UNBALANCE SIGNAL, AN ELECTRIC CURRENT CARRYING CIRCUIT RESPONSIVE TO ANY UNBALANCE SIGNAL, A CONSTANT VOLTAGE SUPPLY SOURCE CONNECTED WHEN RENDERED OPERATIVE TO ENERGIZE SAID MAGNET TO URGE THE PIVOTED MEMBER IN THE OPPOSITE DIRECTION, AND AN ELECTRIC SWITCHING CIRCUIT ACTUATED BY ANY SAID UNBALANCE SIGNAL TO CAUSE SAID CONSTANT VOLTAGE SUPPLY SOURCE TO ENERGIZE SAID MAGNET AND UPON CESSATION OF SAID SIGNAL TO DE-ENERGIZE SAID MAGNET, WHEREBY ENERGIZING IMPULSES OF SUBSTANTIALLY CONSTANT VOLTAGE ARE IMPARTED TO SAID MAGNET OF VARYING PERIOD AND DURATION IN ACCORDANCE WITH THE PERIOD AND DURATION OF SAID UNBALANCE SIGNALS TO MOVE SAID MEMBER IN SAID OPPOSITE DIRECTION TOWARD SAID AVERAGE POSITIONS.