Teter, William E. & Gray, Charles B. Mechanism for Rotating a Locomotive-Headlight., patent, August 18, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858683/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .

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