Measuring and recording instrument

Claim 1

IN A SELF-BALANCING POTENTIOMETER MEASURING AND RECORDING APPARATUS, A POTENTIOMETER NETWORK INCLUDING MEANS FOR APPLYING AN INPUT VOLTAGE IN ACCORDANCE WITH AN INPUT SIGNAL, MEANS FOR PRODUCING A BALANCING VOLTAGE, AND A SLIDE WIRE FOR OPPOSING THE BALANCING AND INPUT VOLTAGES, DETECTOR MEANS RESPONSIVE TO THE BALANCE AND UNBALANCE CONDITIONS OF THE POTENTIOMETER NETWORK, DRIVING MEANS CONTROLLED BY THE DETECTOR MEANS AND OPERATING THE SLIDE WIRE TO BALANCE THE POTENTIOMETER NETWORK, A RECORDING CHART, RECORDING MEANS OPERATED BY THE DRIVING MEANS FOR RECORDING THE INPUT VOLTAGES ON THE CHART, AND A CHART RANGE DISPLACEMENT MECHANISM INCLUDING AN ADJUSTABLE POTENTIOMETER CONNECTED INTO THE POTENTIOMETER NETWORK IN SERIES WITH THE INPUT VOLTAGE APPLYING MEANS, A VOLTAGE SOURCE FOR THE POTENTIOMETER, A PLURALITY OF RESISTANCES, AND A MULTIPLE SWITCHING MECHANISM MOVABLE TO AN OFF POSITION FOR SHUNTING THE POTENTIOMETER FROM THE POTENTIOMETER NETWORK AND FOR DISCONNECTING THE VOLTAGE SOURCE FROM THE POTENTIOMETER, TO OTHER POSITIONS ON ONE SIDE OF SAID OFF POSITION FOR CONNECTING THE VOLTAGE SOURCE TO THE POTENTIOMETER THROUGH SELECTED ONES OF THE RESISTANCES AND FOR CONNECTING THE POTENTIOMETER IN ONE DIRECTION INTO THE POTENTIOMETER NETWORK FOR DESIRED AMOUNTS OF DISPLACEMENTS, AND TO FURTHER POSITION ON THE OTHER SIDE OF SAID OFF POSITION CORRESPONDING TO SAID OTHER POSITIONS WHEN THE INPUT SIGNAL IS SHUNTED FOR CONNECTING THE VOLTAGE SOURCE TO THE POTENTIOMETER THROUGH CORRESPONDING SELECTED ONES OF THE RESISTANCES AND FOR CONNECTING THE POTENTIOMETER IN THE OPPOSITE DIRECTION INTO THE POTENTIOMETER NETWORK TO MEASURE AND RECORD THE AMOUNT OF SUCH DISPLACEMENTS.