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

Equipment Used Afloat and Ashore Redesigned Pyrometer Control—Portable Electric Saw, Three Sizes—Employ New Method of Welding Rotors—New Welding Blowpipe—Preformed Wire Rope HE redesigned pyrometer control made by the Taylor Instrument Co., Rochester, N. Y. and shown in the accompanying illustration em- bodies several new features and im- provements. The weight of the in- strument has been decreased three Tycos Indicating Pyrometer Control pounds and the back panel has been eliminated. This simplifies wiring and makes the instrument easier to install or take down. Simplicity of design and total absence of vibration or shock of any kind in the operat- ing mechanism insure dependability and long life for this pyrometer con- trol. Portable Electric Sac Increases Production HE VAN DORN ELECTRIC TOOL CO. of Cleveland announces, as an addition to their line, three sizes of portable electric saws, the 6-inch, 8- inch and 10-inch, the size representing the diameter of the circular saw blade that is used. They have been devel. oped to increase production sawing of all kinds of wood and with the use of Portable Electric Saw is Made in Three Sizes 94 an abrasive disc to cut slate, marble, asbestos, transite, tile, porcelain, etc. These saws are driven by Universal motors operating on alternating and direct current and conform to the most modern safety practices, incor- porating an automatic safety switch and automatic telescopic guard. The safety switch starts the saw when the trigger is pulled, but cuts off the current the instant the trigger is released, while the telescopic guard automatically opens as the saw enters the work and closes over the blade when the cut is finished, affording the utmost protection to the operator. These saws are fully adjustable, having thumb-screw adjustments for regulation of depth of cut, width of cut and a graduated adjustment for beveled cuts. The depth of cut is adjustable and the maximum depth of the 6-inch size saw is 1% inches, 8-inch size, 2% inches and 10-inch size, 31% inches. Each saw is packed in a compact case for either shipping or carrying the saw to the job. Employ New Method of Welding Rotors N DESIGN the use of welding has progressed to the point where manufacturing methods have taken Welded Rotor, 148 inches Diameter, for Ship Propulsion Motor a place parallel to riveting and cast- ings. The accompanying illustration shows an application where welding is used to obtain maximum efficiency of connections. This particular ro- tor, 148 inches in diameter, was de- signed to withstand exceptional vi- ‘MARINE REvirw—April, 1931 brational stresses, distributing them uniformly throughout the weld with a minimum of stress concentration in both weld and welded members. This rotor is for a ship propulsion motor, rating 13,250 horsepower, 133 revolutions per minute and was made by the Westinghouse Electric & Mfg. Co., East Pittsburgh, Pa. New Welding Blowpipe HE welding blowpipe illustrated in the illustration below is an improved sheet metal blowpipe de: Prest-O-Weld Type W-107 Welding Blowpipe signed primarily for airplane fuse- lage welding although suitable for light welding work of all kinds and operates on the medium pressure principle. The gases mix immediate- ly in front of the handle and the oxygen and acetylene valves are so located that they can be readily ad- justed with the thumb and fore: finger of the hand which holds the blowpipe. The blowpipe is 10%- inches in length, weighs only 10 ounces and is perfectly balanced. Six different size tips are available al- though it is furnished as standard with 5 tips, numbers 2 to 6 inclu- sive. The blowpipe is known as type W- 107 welding blowpipe and is made by the Linde Air Products Co., 205 East forty-second street, New York. Make Preformed Wire Rope The American Chain Co. Ince., in its annual report to its stockholders, has announced that one of its sub- sidiaries, the American Cable Co., has concluded negotiations with the American Steel and Wire Co., a sub- sidiary of United States Steel Corp., to manufacture preformed wire rope under a license agreement, the pat- ents covering this material being owned by the American Cable Co.