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George Thornhill
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Individual
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4655. Thornhill, G. Feb. 25. Drawings to Specification. Toothed gearing for cycles in which the motion is transmitted from the crank axle to the driving- wheel by a train of three wheels. The intermediate wheel is provided with roller teeth, the rollers being loosely mounted upon studs fitted into the grooved rim of the wheel.
GB189804655D1898-02-251898-02-25Improved Chainless Driving Gear for Cycles.
ExpiredGB189804655A
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