The prevention of factory accidents; a practical guide to the law on the safe-guarding, safe-working, and safe-construction of factory machinery, plant and premises

by John Calder

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 ...which always occurs with a close-fitting hood, sometimes with serious results. On the top of the hood and in front of it a strong, adjustable slide is fitted, which can be brought down to the periphery of the ring, thus preventing the broken pieces from flying out. Fig. 97 shows the nature of the protection required at overhung disc and face-grinding wheels. At the former a strong curved bar is hinged at the bottom of the disc, and the upper end is anchored securely by side tie rods. The edge of the face wheel is enveloped by a strong wrought-iron ring, which can be adjusted as the thickness of the wheel reduces through wear. The two examples just illustrated are products of the London Emery Works Company. Fig. 98 shows the method adopted in some spindle and twist drill factories for protecting overhung emery wheels subject to rapid wear and shock, and which require to be readily dismounted and replaced. The hood in this case is made in sections, and is not a part of the machine frame; the top being of steel, or thick cast iron, and the sides of sheet iron. The side next the belt is fixed, while the top and the side from which the wheel is put on are ordinarily clamped to the former, but are made to swing aside together on a vertical hinge for renewals. An adjustable additional cap is provided as a continuation of the hood-top. It may be tilted or, preferably, pierced with holes for light. The flat front slide, illustrated in Fig. 96, sometimes takes its place. The whole protection casing described can be shifted back or forward parallel to the side of the wheel to accommodate worn wheels or those of varying dimensions. An emery wheel requires the same careful handling and freedom from unnecessarily rough treatment as the grindstone, and in the case of both...

90 pages, Paperback

Published January 1, 2012