Réalisation d'un appareil d'Analyse Thermique Différentielle pour l'étude des produits organiques,contrǒle par un thermomètre à contact variable et un autotransformateur tournant

New Differential Thermo Analysis Apparatus for the Testing of Organic Substances The authors describe, a new heating and regulating apparatus for the differential thermo analysis of organic substances in a range of ?100° to +300°C. The apparatus has a contact thermometer whose range can be changed by a right-left changeable synchronmotor. The heating capacity is changed with an automatically controlled regulating transformer which receives the regulating impulses apart from a contact thermometer from a R-C-part as well. It is therefore possible to divide heating and cooling in separate time and thermal steps. Again the control gives the amount of correction for the regulation of heating so that the reproducible thermal and time cycles are run which permit the accurate analysis of, for example, the transformation points of the triglycerides. Along with the circuit diagram and a functional diagram, two examples of thermograms taken with this apparatus are given.