"UNZICKER TRICYCLE, 1878 U.S.N.M. No. 309256... photograph No. 784-B; plate 10, b. ...Patent No. 204636... issued... 1878, to Otto Unzicker... for an "improvement in velocipedes" ...a tricycle propelled by the back-and-forth motion of the wooden handle bars. The bars, which also steer the tricycle, are fastened to the upright arm of a bell-crank attached to the top of the fork. Motion of the bell-crank is transmitted by connecting rods to cranks on the ends of the front-wheel axle. ...The sidesaddle places the rider on the left side of the vehicle. Because of the mechanical disadvantage accompanying this method of propulsion, and the relatively narrow track of the rear wheels... a full-sized vehicle would not have proven very satisfactory on the poor roads of the nineteenth century. ...Unzicker's patent was assigned... to the same Adolph Shoeninger associated with Marble."
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See also: US204636 O. Unzicker Velocipede Patent @Google Patents.
https://en.wikiquote.org/wiki/Catalog_of_the_Cycle_Collection_(Smithsonian_Bulletin_204)
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Catalog of the Cycle Collection (Smithsonian Bulletin 204)
Catalog of the Cycle Collection of the Division of Engineering United States National Museum, Smithsonian Institution United States National Museum, Bulletin 204 by Smith Hempstone Oliver was published in 1953 by the United States Government Printing Office at the Price of 40 cents.
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