Some practical experience with embedded temperature detectors
F. D. Newbury, Carl J. Fechheimer · Journal of the American Institute of Electrical Engineers · 1920
ENGINEERS are interested in the maximum armature coil temperatures and in the average temperature of the embedded portion of the coil. Only the former are discussed at length in the paper, and test data are submitted to bear out the statements; in general the test data include temperature measurements on the bare copper.