G - Physics – 01 – K
Patent
G - Physics
01
K
73/63
G01K 17/00 (2006.01) G01N 25/48 (2006.01)
Patent
CA 1159278
Title METHOD AND APPARATUS FOR CALORIMETRIC DIFFERENTIAL THERMAL ANALYSIS Abstract of the Disclosure A calorimetric differential thermal analyzer uses a planar thermoelectric sheet as its major heat flow path for transferring heat from a heat source to both the reference and sample positions. The heat source is connected to each of the positions by equivalent thermal paths formed by the sheet itself. These paths to each test position are made thermally equivalent by making them geometrically similar and forming isothermal boundaries on the sheet itself between each of the test positions. These isothermal boundaries are connected to the heat source and formed of a material having a high thermal conductance. The thermal equivalency of the paths may be enhanced by removing portions of the sheetlike material to form well defined patterns of heat flow in the sheet; e.g., structures in which the sheet is formed into radial arms in a wheel-like array with each test position being on a different spoke of the wheel. Heat from the heat source may be applied through the hub of the wheel or the rim of the wheel or both, the hub and rim being in good thermal contact with isothermal boundaries having a high thermal conductance.
388983
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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