FIRESTONE RUBBER TIRES.
The accompanying illustration is a sectional view of the Side Wire rubber tire manufactured by the Firestone Tire and Rubber company, Akron, Ohio. It is constructed with steel crossbars near the base of the tire, vulcanised in the rubber and distributed at regular intervals throughout the length of the tire. Two Swedish cold-drawn, steel wires made into hoops of the required size, are sprung round the edge of the tire by means of a simple machine and rest upon the shoulders formed by the cross-bars holding the tire secure. The many advantages gained by using rubber tires are apparent, one of which is that they greatly reduce the liability of accident. A single accident to man, beast or apparatus may easily exceed the cost of tire equipment. Other advantages are, an increased running speed, reduction of draught on horses, as with them it is possible for drivers to cross hose lines without danger of cutting. Rubber tires also materially reduce maintenance expense, by saving apparatus from hard jolts, thus preventing breaks and other damages which frequently occur when steel tires are used. The severity of fire department service makes it imperative that the tires used be perfectly constructed, and properly applied; otherwise they are apt to roll in swinging corners and neither economic nor satisfactory results can be obtained. The side-wire tire meets every requirement. It is held absolutely solid in the channel by the tension of the strong side wires, and there is no possible chance of its being pulled from the wheel in rounding comers at full speed. Much attention has been given to the manufacture of these tires to make them adaptable for severe service, and the side-wire method ot attachment is recognised to be the only satisfactory way of applying rubber tires to fire apparatus. Handsome booklets fully describing the mechanical construction of the Firestone tire will be cheerfully sent by the company to all who are interested.