. Hardware merchandising January-June 1898. ~MP1 Vfke ,d Viewlookirvq from front of b 1 c-u ck , w/ifti frontvAee-l off Pedal AxleSlofed Crank oj PaylsF?eoyt^ivcol to av\d Crankto Bc-ycl*- ** 9- siderably less, which would make the bi-cycle more becoming for the female. The 28-inch driving or back wheel isgeared to 100 inches by the ordinary Hum-ber pattern chain running over a 25-toothedsprocket wheel and a 7-toothed hub sun and planet wheels merely controlthe relative positions of the main andsecondary cranks. Figure 5 shows the de-tail
. Hardware merchandising January-June 1898. ~MP1 Vfke ,d Viewlookirvq from front of b 1 c-u ck , w/ifti frontvAee-l off Pedal AxleSlofed Crank oj PaylsF?eoyt^ivcol to av\d Crankto Bc-ycl*- ** 9- siderably less, which would make the bi-cycle more becoming for the female. The 28-inch driving or back wheel isgeared to 100 inches by the ordinary Hum-ber pattern chain running over a 25-toothedsprocket wheel and a 7-toothed hub sun and planet wheels merely controlthe relative positions of the main andsecondary cranks. Figure 5 shows the de-tails oi this crank mechanism. It will beseen to consist of a sun wheel rigidly and. Figure g. concentrically attached to each side of thecrank bracket, and a pair of hollow cranksresembling in shape the figure 8, one-halfof each crank encloses a sun wheel theother or outer half a *planet wheel, of thesame size as a sun wheel, and, engagingdirectly there with each pedal, is screwedinto a planet wheel at a point midway be-tween its centre and the pitch line of itsteeth. In the bicycle under trial the maincrank and the pitch diameter of the sun andplanet wheel was 6^ inches, the axes of thepedals were 1 19-32 inches from the axes ofthe planet wheel. Figure 6is a diagram showing the pedalsmovement. The foot motion is but slightlydifferent from the circular motion now in
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Keywords: ., bookcentury1800, booksubjectbu, booksubjectimplementsutensilsetc
