The problems of obtaining accurate strain data, providing reliable temperature control, and affording oxidation protection arise in the experimental determination of the elevated temperature creep properties of materials. The apparatus described in this paper provides an autographic strain record using commercially available equipment, reliable temperature control for both constant or programmed cyclic temperatures , and oxidation protection by means of specimen encapsulation.
Hammel, Robert L. and Uhrig, Robert E., "An autographic elevated temperature creep testing facility" (1959). Ames Laboratory Technical Reports. 20.