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Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
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order to form the circumference of a wheel. The same agent, fire, was used in early times to supple the planks of vessels. See wood-bending. India-rubber wheel-tires are used for the purpose of decreasing the jar on the vehicle, and as a means of increasing the tractive adherence. In the Thomson road steamer a thick rubber tire, capable of yielding to the inequalities of the ground, and protected by an endless band of steel slats, is employed. In 1852, a patent was granted to Marcus Davis in England, for forming locomotive tires of a soft material, covered with india-rubber protected by an exterior sheet of steel. In the same year Thomas Allan obtained a patent for encircling wheels with an outer tire of vulcanized india-rubber, solid or tubular, or other elastic substance. The advantages of this arrangement for road locomotives were particularly set forth. At the same time Mr. Dunlop patented a tire of annealed cast-iron, grooved to receive an india-rubber band. Vario