Heat treating and inspection of metals Page: 7
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HEAT TREATING AND INSPECTION OF METALS
1. Pyrometer thermocouple.
2. Excess temperature cut-out thermocouple.
3. Recording pyrometer.
4. Control circuit switch.
5. Main line switch.
U. Excess temperature cut-out.
7. Power input controller.
S. Solenoid relay.
FIGUiLE 2.-IIeavy duty type electric heat-treating furnace.
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United States. War Department. Heat treating and inspection of metals, book, September 10, 1941; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc96657/m1/9/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.