Differential thermal analysis apparatus

Claim 1

AN ANALYZER CELL ASSEMBLY FOR USE IN A DIFFERENTIAL THERMAL ANALYSIS APPARATUS COMPRISING (1) A SAMPLE BLOCK CONTAINING THEREIN AN ELECTRICAL HEATER AND AT LEAST THREE WELLS, TWO OF SAID WELLS BEING SYMMETRICALLY ARRANGED IN REFERENCE TO A PLANE OF SYMMETRY THROUGH THE AXIS OF SAID HEATER, EACH OF SAID WELLS CONTAINING A CLOSELY FITTING TUBE CLOSED OFF AT THE END FACING THE BASE OF THE WELL, THE VOLUME OF SAID TUBE IN SAID SYMMETRICALLY ARRANGED WELLS BEING IN A RANGE OF FROM 0.01-1.25 ML.; A TEMPERATURE SENSING MEANS WITHIN EACH TUBE, EACH TEMPERATURE SENSING MEANS BEING COUPLED IN BUCKING SERIES WITH A REFERENCE TEMPERATURE SENSING MEANS, (2) A CELL BASE FOR SUPPORTING SAID SAMPLE BLOCK, (3) AN OPEN-ENDED CELL CLOSURE WHICH CAN BE BROUGHT INTO AIRTIGHT ENGAGEMENT WITH SAID CELL BASE DEFINING AN ENCLOSED SPACE SURROUNDING SAID SAMPLE BLOCK, (4) CONDUIT MEANS IN COMMUNICATION WITH SAID ENCLOSED SPACE THROUGH WHICH THE ATMOSPHERE WITHIN SAID ENCLOSED SPACE MAY BE CONTROLLED, (5) CONDUIT MEANS IN COMMUNICATION WITH SAID ENCLOSED SPACE THROUGH WHICH COOLANT MAY BE SUPPLIED TO COOL SAID SAMPLE BLOCK.