Gears for Drive Shaft Bike

In the late 19th century many bicycle industry pundits thought that drive shafts would be the bicycle power train of the future.  The patent below was a way for the bevel gear of a drive shaft bike to engage a selected gear, and to change to another gear for more gearing options.  This system might have been in use today had not derailluers been developed to allow a chain to be moved from gear to gear.

   

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[vaseem raza]

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