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August, 1921 MARINE REVIEW PLATES TO BE DRILLED ARE PLACED UNDER THE MACHINE WHICH IS TRAVERSED ON A TRACK Late Marine Patents Copies of any one of these patents can be obtained by forwarding 25 cents in stamps to Siggers and Siggers, patent attorneys, National Union building, Washington, and mentioning MARINE Re- VIEW, 1375907 Propeller, T. L. Helsaback, Brand- ford, Fla. $ 1376055 Mark buoy for seaways, M. Vitrack, Paris, France. : 1376105 Submarine destroyer, Carl J. Lind- quist, New York, assignor of one-half to Paul C. Hayes, Toledo, O. 1376170 Mechanical control of sails, M. H. Churchill Shann, Wodonga, Victoria, Australia. Special Machine Drills Holes in Plates A gantry drill press designed especial- ly for drilling holes in plates used in the manufacture of tank, gondola or other types of steel cars as well as boilers and ships, recently has been built by William K. Stamets, Pitts- burgh. As shown in the accompanying illustration, the machine is mounted On at track, the gage of which is wide enough to allow the drill to straddle the plate. Traversing of the drill on the track is accomplished by means of a motor and an adjustable controller. The drilling head is mounted on the radial arm, the latter swinging on its Support on the cross beam. Only one radial arm and_ drilling head is shown on the machine in the illustration, however, two, three or four arms and heads can be employed as readily. Two arms can be used on each side of the beam, or if the span is increased, a larger number than four radial arms can be used. More than one drilling head may be mount- ed on each radial arm if desired. Oper- ating power for the drill is supplied by the motor mounted on the beam, the electrically controlled changes in speed combined with the mechanical changes of the drill head permitting a 385 wide range of speeds. Because of in- sufficient demand for a drill of this type and the widely varying require- ments met in practice, the machine is not built as standard. Engine Generator Set Especially adapted for lighting and power on shipboard is a Westinghouse- Sturtevant marine lighting set recently placed on the market. These outfits are designed to have reliability, light weight, compactness and economy of operation. Both the engine and gen- erator making up these sets embody the results of considerable engineering and manufacturing experience. Auto- matic lubrication, elimination of vibra- tion, low piston speed, sparkless com- ruutation, and good voltage regulation are features developed in the design. The frame is made .oil and dust proof and provided with large open- 'ings having cast iron covers in such a position as to give ready access to all parts subject to wear. In the top of the frame is cast an oil reser- voir for the lubricating system. An ample distance piece separates the cylinder and frame in which are en- closed a watershed partition and stuff- ing box: The watershed partition pre- vents the water from the cylinder leak- ing onto the frame and the coil in , NG AND POWER SUPPLY GHT ENGINE GENERATOR SET FOR LIGHTI? cnn ees ON SHIPBOARD