Wheels and wheeling; an indispensable handbook for cyclists, with over two hundred illustrations . Whippet Spring Frame Safety. down in the head of the rear forks. At the foot, thej_ crank bracket is supported in the center by a verystrong coil spring, held by an adjustable screw at thetop to a lug below the backbone. The whole weightrests on this spring, but is unaffected by the pedalaction; the two rear stays are pivoted on the axle, soas to move with the spring action, but at the sametime keep the pedals at the same distance, and per-fectly rigid. In order that the handle bar may respondto
Wheels and wheeling; an indispensable handbook for cyclists, with over two hundred illustrations . Whippet Spring Frame Safety. down in the head of the rear forks. At the foot, thej_ crank bracket is supported in the center by a verystrong coil spring, held by an adjustable screw at thetop to a lug below the backbone. The whole weightrests on this spring, but is unaffected by the pedalaction; the two rear stays are pivoted on the axle, soas to move with the spring action, but at the sametime keep the pedals at the same distance, and per-fectly rigid. In order that the handle bar may respondto the movements of the suspended portion, the steer- ANTI-VIBRATION* DEVICES. *35 ing pillar is divided, and joined by flat, jointed linkswhich permit the handles to dip and rise again; theydo not interfere with the steering, and equal com-mand is obtained over the pilot wheel, whatever theposition of the movable parts. A device to annihilate vibration, applicable to thesteering wheel of a Safety, or the rear wheel of anordinary, is called the Will-o-the-Wisp Anti-Vibra-. Will-o-the-Wisp Anti-vibrator. tor. It is a single coil of stout steel wire arrangedas in the annexed illustration. The fork ends attachto one arm of a lever, and rest upon the spring. Aside arm projects upward from the lever which isattached to the wheel pin, and bears at its top a but-ton or pad of rubber against which the fork brings upshould the spring be greater than usual. The springson each side are kept stiff and firm by a continuationor fork of strong wire, which passes round at the backof the wheel and unites them. 236 WHEELS AND WHEELING. The patent Zulu rim is similar in principle to the Boazand Quadrant already shown. In this case the insu-
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Keywords: ., bookcentury1800, bookdecade1890, bookidwheelswheeli, bookyear1892
