Abstract
The paper describes an apparatus for high temperature mechanical testing suitable for accurate determination of creep and allied effects. The apparatus includes a sensitive extensometer and a method for very close control of the temperature of the specimen heated in an electric resistance furnace. The method makes use of a platinum resistance coil placed in the furnace, and which forms part of a Wheatstone Bridge and through a control indicator and relay operates the adjustment of the furnace current to compensate for minor fluctuations from various causes. The form of testing machine and layout are described, and the order of sensitivity indicated.
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