The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

Compactness and Remarkable Adaptability Feature Modern Battleship's Machine Shop Lo N ESSENTIAL feature of modern naval design is the provision of adequate facilities for making the repairs which are constantly necessary aboard so complicated a piece of mechanism as a battleship. Although a machine shop aboard one of Uncle Sam's capital sea fighters comprises only a few essential tools and is intended mainly for minor repair work, its range of usefulness is surprising. Indeed, it is a really serious emergency, such as the fracture of a propeller shaft, or failure of the intermediate or low pres- sure rings of the main engine, which cannot be remedied aboard ship im- mediately without reference to a navy yard. Supplementing the machine shop, are a brass and aluminum foun- dry, and coppersmith, blacksmith and tinsmith shops. Although in laying out these depart- ments it was borne in mind that space aboard a battleship is at a premium, there is plenty of room to handle all work which is likely to come within their scope. Such work includes the casting and machining of valve cast- ings, eccentric straps, pump liners, flanges, the cutting of gears, the re- babbitting and boring of crank bear- ings for the main engine, the making of small hand forgings, the forming and riveting or brazing of tanks and pipe andi many other operations. _ Fig. 4 shows the principal unit in the machine shop, a 24-inch engine lathe, 10 feet between centers, en- gaged in turning a 10-inch piston Ting for the main circulating engine. 182 [SSS Photographs by Underwood & Underwood The lathe has a 3-foot gap permitting a swing of 48 inches. It is used principally for turning high-pressure follower rings, piston rings and _ eccentric straps for the main engine and for turning and boring pump liners. Fig. 3 shows a corner of the machine shop with a 12-inch radial drill in the foreground. This machine is direct-driven by a 3-horsepower motor and is provided with a rotary table in order that the work may be set at any desired angle to the tool. Ulsed for the boring of pump cylinder connections and for general drilling and boring operations, the machine as shown in the illus- tration is engaged in reaming a bush- ing in the valve gear arm of a fire and bilge pump. Other machines shown in this illustration are a 14 inch swing lathe, 48 inches between centers, direct driven by a 2-horse- power motor; a 14 x 60-inch tool lathe and a hacksaw direct-driven by a l-horsepower motor. Fig. 5 shows a No. 2 universal mill- ing machine which is belt-driven by a 2-horsepqwer reversible motor. This machine is used for a large variety of Purposes, including the cutting of gears, the machining of gear cutters, keyway cutters and special milling tools. It is provided with a com- plete assortment of keyway cutters, metal slitting saws and cutters for making drills, reamers, taps and other tools. As shown in the illustration, it is engaged in cutting a keyway in the valve arm of a fire and bilge pump. Additional tools in the machine shop in-