Thermistor sensitized servomechanism for automatic recording of volumetemperature distillation data

Claim 1

AN AUTOMATIC SYSTEM FOR CONTROLLING THE DISTILLATION OF A LIQUID AND RECORDING A TEMPERATURE-VOLUME DISTILLATION CURVES THEREOF COMPRISING A FLASK ADAPTED TO HOLD SAID LIQUID, AN ELECTRIC HEATER FOR SAID FLASK, A LIQUID RECEIVER, A CONDENSER FOR CONDENSING AND TRANSFERRING DISTILLATE FROM SAID FLASK TO SAID RECEIVER, A FIRST TEMPERATURE-SENSITIVE RESISTOR IN SAID FLASK RESPONSIVE TO THE TEMPERATURES ABOVE THE LIQUID THEREIN, FIRST ELECTRICAL MOTIVE MEANS, A POTENTIOMETER ACTUATED BY SAID ELECTRICAL MOTIVE MEANS IN RESPONSE TO THE DIFFERENCE IN THE VOLTAGES ACROSS SAID FIRST TEMPERATURE-SENSITIVE RESISTOR AND SAID POTENTIOMETER TO BALANCE SAID VOLTAGES, A SECONF TEMPERATURE-SENSITIVE RESISTOR MOUNTED FOR MOVEMENT VERTICALLT ABOVE SAID LIQUID RECEIVER, SAID SECOND RESISTOR BEING RESPONSIVE TO ITS THERMAL RELATION WITH ITS SURROUNDINGS TO EXHIBIT AN INTERMEDIATE RESISTANCE VALUE AND OPPOSITE-SENSE VARIATIONS THEREFROM WHEN RESPECTIVELY POSITIONED BELOW AND ABOVE THE SURFACE OF SAID DISTILLATE, SECOND ELECTRICAL MOTIVE MEANS FOR MOVING THROUGH A MOTION TRANSMITTING COUPLING SAID SECOND TEMPERATURE-SENSITIVE RESISTOR IN RESPONSE TO SAID RESISTANCE VARIATIONS IN THE SAME IN A DIRECTION TENDIG TO RESTORE SAID INTERMEDIATE VALUE WHEREBY SAID SECOND TEMPERATURE-SENSITIVE RESISTOR FOLLOWS THE RISE OF THE DISTILLATE SURFACE IN SAID RECEIVER, AND RECORDING MEANS INDEPENDENTLY RESPONSIVE TO SAID FIRST AND SECOND ELECTRICAL MOTIVE MEANS FOR RECORDING A TEMPERATUREVOLUME DISTILLATION CURVE OF SAID LIQUID.