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The Marmon-Herrington Company, Inc. (MH) is an American manufacturer of axles and transfer cases for trucks and other vehicles. Between 1946 and 1959, they entered the trolley bus manufacturing field, producing 1,624 buses from their Indianapolis factory.


The company's foray into transit buses began in 1946, when it produced its first electric trolley bus. The end of World War II had brought a steep drop in the need for military vehicles, so Marmon-Herrington looked for another area of vehicle manufacturing in which it might find new business. Its first "trolley coaches", the more common term for trolley buses at that time, introduced innovative features such as lightweight monocoque bodies and strong, double-girder sidewalls, which made the Marmon-Herrington trolley coach the best-selling trolley coach of the postwar era. Its trolley buses were successful in the fleets of many North American cities, most notably Chicago and San Francisco, which purchased large numbers; Chicago bought 349 in a single order (delivered in 1951–52), a record for the MH company. Marmon-Herrington supplied trolley buses to 16 different cities in the United States, among the buyers being the Cincinnati Street Railway Company, which purchased 214, and the Cleveland Railway, with 125; vehicles were also sold to two cities in Brazil. The principal models were the TC44, TC48, and TC49, with the number denoting the number of seats. A single order of the 40-seat TC40 model was produced for San Francisco, and likewise the TC46 was produced for only one customer, Philadelphia, before MH replaced it with the TC48 model.[1]



Trolley Bus


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