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1884 Kingston Welch patented a machine he named as a Dicycle that outwardly resembled the Otto bicycle. His machine though differed from the Otto by having a single central positioned drive mechanism as against the two drive mechanisms of the Otto.
By redesigning the complicated drive of the ‘Otto’ bicycle, Welch, simplified the ‘drive’ mechanics and gave the new machine a much cleaner appearance.
Otto actually patented a similar central-drive machine, patent No.7827 but at a later date than Welch in May 1884, also adopting the name Dicycle and by doing so confused the two types of machines ever since.