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AUTOMOTIVE TRANSMISSION UNIT

H. H. Doehler, Die Casting.  New York:  McGraw-Hill Book Company, Inc., 1951.
Herman Doehler invented the die-casting process.  This book, signed by him, details the process of manufacturing die casting machines, making dies, and finishing and trimming die castings.  Doehler founded the Doehler Die Casting Company in Toledo in 1907.  In the company’s early years, it was the first major manufacturer of hood ornaments for American cars.  Prior to 1946, Doehler’s company made the die castings and then sent them to the Jarvis Company for finishing.  That year, Doehler bought Jarvis, and created Doehler-Jarvis, which became the largest independent aluminum die caster in the nation.  It had a large factory on Detroit Avenue in Toledo.  In 1994, the company was purchased by Harvard Industries, an auto parts producer headquartered in Tampa, Florida.  The company closed the Toledo factory soon thereafter, and ended pension and health care benefits for retirees.  In 2002, Harvard Industries declared bankruptcy. 

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