From the Past - TEngland Photography
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1908 Motor Car

this 1908 auto used a friction-drive transmission. A roller on the front sprocket shaft was pressed against the rear surface of the engine flywheel, thus driving the sprocket shaft, the drive chains and the rear wheels. Moving the shift lever set the drive roller to various positions on the flywheel, either nearer the center or nearer the edge, effectively changing the "gear ratio" for climbing hills or driving on level roads. Moving the roller past the center point spun it backwards to give reverse gear. The front sprocket drive shaft was free to slide forward and backwards slightly, just enough to allow the roller to move away from the flywheel. The "clutch pedal" worked differently from most other cars, in that the operator had to hold their foot on the pedal to keep the roller pressed against the flywheel