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George Thomas Martin
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Individual
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Individual
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Publication of GB189720707ApublicationCriticalpatent/GB189720707A/en
20,707. Martin, G. T. Sept. 9. Ball bearings for velocipedes. The driving- mechanism consists of a train of bevel-wheels suitably mounted by which the motion is transferred from the crank axle A to the chain-wheel P. The axle A is supported on ball bearings p, o' within the housing D, and the sleeve K which carries the chain-wheel is mounted upon the bearings i<11>, l, o. A shouldered ring N adjustable upon the balls o is screwed within the cup M, and a grooved ring 0 separates the sets of balls o, o<1> and makes with the cup M, the cone A<1>, and the ring N a race way for the balls. The shaft G, which carries the gearwheels E and F, runs upon balls g carried within the bearing-box H, which is secured by the bracket H<1> to the housing D.