Читать книгу The Modern Bicycle and Its Accessories - Julius Wilcox - Страница 39
THE CRAWFORD CHAINLESS.
ОглавлениеThe Crawford chainless is of the bevel type, and has its driving members in the same positions relative to each other as most of the other models, but it is distinctive in having, apparently, the fork drive instead of the central shaft. That is, as is sometimes on the French Acatene and in the models with the Sager pin-roller gear as thus far made, the driving shaft is tubular and takes the place of the usual fork, carrying the pinions on its ends, while the stay is a stout rod paralleling this shaft and within it, running from crank axle to wheel hub and fastening at each end with a nut. The lefthand side has a similar stay rod within the fixed tube, so that the frame is especially stiff. The wheel hub has twenty-four teeth and the shaft has twenty-three at the rear, as usual; but at the front are eighteen, driven by forty-eight. As the Crawford chainless is under license from the Pope Company, some comment has been caused by its announced price of $75, but the explanation is offered that an exception was made in case of this model because it uses only some of the patents held by the Pope Company.