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Equipment Used Afloat and Ashore Totally Enclosed Fan Cooled Motor—New Burner for Oil or Powdered Fuel Glue Pot of New Design-—Propeller Blower—Electric Air Oscillator TOTALLY enclosed, fan A cooled, induction motor which embodies numerous ~ new and unusual features has re- cently been announced by The Lin- coln Electric Co., Cleveland, manu- facturers of ‘‘Linc-Weld”’ motors and “‘Stable-Are’’ welders. This new motor, shown in the accompanying illustration, is so ingeniously de- signed that its rise in temperature is said to be considerably less than the allowable rise for motors of this type. The design of this motor also includes arc-welded steel con- struction, double-sealed ball bear- ings, and a removable cover which facilitates easy cleaning of the un- usually large radiating surface. The large radiating surface is ob- tained by complete enclosure of sides of the motor with a deeply corrugated sheet of corrosion re- sisting metal. This conducts the heat created within the motor to its outer radiating surface which is constantly cooled by a_ continual draft of fresh air passing over the radiating surface. The air imprisoned within the completely sealed frame is constant- ly circulated by a fan arc-welded to the rotor. This fan drives the heated air within the motor to con- tinuous contact with the large cor- rugated cooling surface. The out- side air which drives the heat from the radiating surface is forced over the exterior of the corrugated sur- Two Views of Fan Cooled Induction Motor with Cover On (Upper) and Off 52 face by a large arc-welded fan at- tached to the motor shaft. The out- side air is drawn in at one end of the motor and expelled at the other end. The corrugated cooling surface is easily accessible for cleaning as the one-piece cover can be removed by loosening the two thumbscrews which hold it securely in place. This feature permits maintenance of highest possible radiation at all times. ‘ The frame is fabricated of § arc- welded steel to give it exceptional strength and rigidity. The stator laminations are stacked in the frame by hand, then subjected to extreme- ly high pressure. While under pressure they are permanently af- fixed by a retainer ring which is arc-welded to the frame, making the stator core an integral part of the motor frame. The rotor core is formed by hot-riveting the laminated iron while under high pressure. On motors built by this company, 28- gage laminations are used both on the stator and rotor cores, rather than the usual 26-gage laminations to insure better electrical character- istics. To insure complete enclo- sure of the motor the rolled steel end plates are machined to accu- rately fit the end rings of the mo- tor frame. The ball bearings which enclose the shaft opening in the end plates are sealed both inside and outside. This new motor has the same mounting dimensions as standard, open type, horizontal motors of equal rating. It is manufactured in sizes from 1 to 50 horsepower. New Type of Burner for Oil or Powdered Fuel NE of the newest developments in mechanical oil burning sys- tems is a new model register known as Type C, just announced by the Coen Co. Inc. Burners made by this company have been used for many years by private and government shipbuilders. This type burner has a square frontal design and has been built to meet changing conditions re- quiring a forced draft with preheated air running up to 1000 degrees Fahr. Yet this new design is equally suit- able for either natural or induced draft. The vane wheel, a part of most cylindrical registers, has been elimi- nated, air being taken through four large tangent ports, giving the same MARINE REVIEwW—J anuary, 1931 effect as a vane wheel but materially reducing air friction. All portions of the register are constructed of the finest grade of heat-resisting steg and are easily accessible. New Burner for Either Natural or In- duced Draft Design of the register makes in- stallation easier and more substan- tial, while it is possible to materially increase the frontal insulation. The register may be used separately for either oil or powdered fuels or in combination. Register presents an admirable combinaton of efficiency, durability and a wide range of adapt- ability. New Hold Heet Glue Pot To 1931 model of its Hold Heet automatic electric glue pot has just been brought out by the Russell Electric Co., Chicago. This pot has been in use since 1914 and the new model, “built like a boiler,’ contains two outstanding improvements. Heavy boiler plate has been used in the con- struction of the outside, making it practically impossible to injure the pot no matter how abused, and a new contact thermostat has been added which regulates direct from the glue chamber temperatures rather than from the air temperature between the walls, as has been customary. eguvnneneusn pets HELI HLELEUUSS? ii . — \ Sa