Indicator compensation

Claim 1

IN AN INDUCATOR DEVICE, A DIFFERENTIAL PRESSURE TRANSMITTER; A TRANSMITTING DIFFERENTIAL TRANSFORMER HAVING A MOVABLE CORE, A PRIMARY AND A SECONDARY; A BALANCING DIFFERENTIAL TRANSFORMER HAVING A MOVABLE CORE, A PRIMARY AND A SECONDARY, THE SAME ONE OF THE PRIMARY AND SECONDARY IN BOTH THE TRANSMITTING DIFFERENTIAL TRANSFORMER AND IN THE BALANCING DIFFERENTIAL TRANSFORMER HAVING EQUAL OPPOSED COILS CONNECTED IN SERIES; MEANS OPERATIVELY CONNECTING THE DIFFERENTIAL PRESSURE TRANSMITTER TO THE CORE OF THE TRANSMITTING DIFFERENTIAL TRANSFORMER TO MOVE THAT CORE IN RESPONSE TO THE MOVEMENT OF THE DIFFERENTIAL PRESSURE TRANSMITTER; AN INDICATOR HAVING AN INDICATOR SHAFT PIVOTALLY MOUNTING THE INDICATOR; MEANS FOR BIASING THE INDICATOR SHAFT IN ONE DIRECTION; MEANS OPERATIVELY CONNECTING THE INDICATOR SHAFT WITH THE MOVABLE CORE OF THE BALANCING DIFFERENTIAL TRANSFORMER TO MOVE THE BALANCING DIFFERENTIAL TRANSFORMER CORE IN RESPONSE TO MOTION OF THE INDICATOR; AN ELECTRIC MOTOR, MEANS OPERATIVELY CONNECTING THE ELECTRIC MOTOR TO THE INDICATOR SHAFT AND CONNECTED TO THE INDICATOR SHAFT FOR MOVING THE INDICATOR SHAFT AWAY FROM THE INITIAL POSITION WHILE THE CORE OF THE BALANCING DIFFERENTIAL TRANSFORMER MOVES TOWARD BALANCE; CIRCUIT MEANS OPERATIVELY CONNECTING THE SECONDARIES OF THE TRANSMITTING DIFFERENTIALS TRANSFORMER AND THE BALANCING DIFFERENTIAL TRANSFORMER IN SERIES OPPOSED TO ONE ANOTHER AND TO THE ELECTRIC MOTOR; AN ENERGIZING TRANSFORMER HAVING A PRIMARY, A CORE AND TWO SECONDARIES, MEANS OPERATIVELY CONNECTING ONE OF THE SECONDARIES, MEANS ENERGIZING TRANSFORMER TO THE PRIMARY OF THE TRANSMITTING DIFFERENTIAL TRANSFORMER; MEANS OPERATIVELY CONNECTING THE OTHER SECONDARY OF THE ENERGIZING TRANSFORMER TO THE PRIMARY OF THE BALANCING DIFFERENTIAL TRANSFORMER, AND POWER INPUT TERMINALS FOR APPLYING ALTERNATING ELECTRIC CURRENT TO THE PRIMARY OF THE ENERGIZING TRANSFORMER.