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This device is a precursor of the traditional sewing machine.The user steps repeatedly on the treadle, observing how the crank converts the foot's up-and-down motion into rotary motion, and the flywheel's inertia ensures a smooth and continuous rotationץ

Today, sewing machines opporate in a similar fasion, except that they are operated by electric motors, instead of one's foot. Additionally, engines of all motor vehicloes turn thanks to a camshaft mechanism, heralded by da Vinci's crankץ


Technological mechanisms: Treadle, flywheel, crank, inertia


Size in millimeters: height: 325

width: 805

length / depth: 350