Heat exchange – Heating and cooling – Heating and cooling of the same material
Patent
1991-03-28
1993-12-14
Ford, John K.
Heat exchange
Heating and cooling
Heating and cooling of the same material
432 53, 432 56, 432 77, 432 85, 374 57, 374 45, 62 78, 62 64, G01N 360, G01N 2572, F25B 2900
Patent
active
052693708
ABSTRACT:
A thermal cycling apparatus having an upper heat chamber and a lower cold chamber positioned vertically beneath the upper heat chamber and vertically coaxial therewith whereby a material to the thermal cycle tested can be transferred between the upper heat chamber and the lower cold chamber. An externally operated flapper door within the thermal cycling apparatus separates the two chambers. The material to be thermally tested is placed in a basket constructed of suitable material which can be translated between the two chambers from a location externally of the chambers. The temperature in the upper chamber is elevated by gaseous nitrogen to a temperature up to about 1000 degrees F. and the lower cold chamber is cooled by a cryogenic liquid. Cycle testing is preformed by alternately transferring the material, i.e. 40 or more specimens at a time, between the upper and lower chambers the number of times desired.
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Christian Earl L.
Owen Kyle C.
Duncan John R.
Ford John K.
General Dynamics Corporation, Space Systems Div.
Gilliam Frank D.
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