Voltage balancing circuit

Claim 1

A WEIGHING SCALE COMPRISING, IN COMBINATION, TRANSDUCER MEANS FOR GENERATING AN OUTPUT VOLTAGE PROPORTIONAL TO LOAD APPLIED TO THE SCALE, ADJUSTABLE MEANS IN CIRCUIT WITH THE TRANSDUCER MEANS FOR SUPPLYING A BALANCING VOLTAGE IN OPPOSITION TO THE OUTPUT VOLTAGE, SERVO MEANS IN CIRCUIT WITH BOTH SAID MEANS FOR ALTERING THE ADJUSTABLE MEANS IN A BALANCING DIRECTION IN RESPONSE TO DIFFERENCES BETWEEN SAID VOLTAGES, MULTI-TAPPED MEANS HAVING ASSOCIATED SWITCH MEANS FOR ADDING INCREMENTS OF VOLTAGE TO THE BALANCING VOLTAGE TO INCREASE THE CAPACITY OF THE SCALE, AND SELECTIVELY OPERABLE VOLTAGE LINEARITY CURVE SHAPING MEANS IN CIRCUIT WITH SAID MULTI-TAPPED MEANS FOR ALTERING THE VOLTAGE LINEARITY FUNCTION THEREOF TO SUBSTANTIALLY CONFORM TO THE VOLTAGE LINEARITY FUNCTION OF SAID TRANSDUCER MEANS, SAID VOLTAGE LINEARITY CURVE SHAPING MEANS INCLUDING FIRST IMPEDANCE MEANS IN SERIES WITH SAID MULTI-TAPPED MEANS FOR SUBSTANTIALLY MATCHING SAID OUTPUT AND BALANCING VOLTAGES IN ONE MODE OF OPERATION WHEREIN A FIRST LINEARITY TYPE OF TRANSDUCER MEANS IS EMPLOYED AND SELECTABLE IMPEDANCE MEANS HAVING ASSOCIATED SWITCH MEANS FOR PLACING THE SELECTABLE IMPEDANCE MEANS IN PARALLEL WITH THE MULTI-TAPPED MEANS, THE PARALLEL COMBINATION OT THE SELECTABLE IMPEDANCE MEANS AND THE MULTI-TAPPED MEANS BEING IN SERIES WITH SAID FIRST IMPEDANCE MEANS, FOR SUBSTANTIALLY MATCHING SAID OUTPUT AND BALANCING VOLTAGES IN A SECOND MODE OF OPERATION WHEREIN A SECOND LINEARITY TYPE OF TRANSDUCER MEANS IS EMPLOYED.