This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 edition. Excerpt: ...by an arm, and which can be readily collapsed to allow of its diameter being reduced, is provided on its periphery with two lateral grooves corresponding to the position of the wires in the edges of the tire and also preferably, a central ridge corresponding approximately to the curvature of the tread portion of the tire. Each side of the drum is provided with a series of hooks or an annular groove for the reception of a tension band. The fabric which is to form the tire is placed in position around the periphery of the drum, the tension bands being placed on it and employed to assist in smoothing out the fabric and holding it in position while the wires are being placed in the edges and the latter turned over. When the process of building up is completed, the drum is collapsed and the tire removed therefrom. Another form of collapsible drum has a flat periphery in which are formed grooves for the reception of the wires, but no central ridge. This drum may be employed to form pockets of fabric containing the retaining wires, the fabric being stretched and smoothed out with the aid of the tension bands and then the edges folded over the wires. After the latter has been put in position, the edges of the fabric meeting about the center of the strip, the latter is cut down the center so as to leave the two pockets complete with the wires therein. To facilitate the shaping of the tire previous to its completion a third form of collapsible drum is provided with a periphery grooved so that the cross section corresponds to the cross section of the channel or tire receiving face of a wheel rim. The tire carcass previous to the outer rubber covering being applied thereto, is placed on this drum and inflated, when the fabric of which it is formed...