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424 f ORDINARY INDUCED QEAFT INSTALLATION. CENTRIFUGAL FAN 63 DRIVEN EY RECIPROAT- (NG ENGINE USING STEAM OF 126 lbs PRESSURE. MARINE REVIEW - TURBINE PREHEATER UT BG a as . | Hn | 2. INDUCED TURBO-DRAFT INSTALLATION. PROPELLER FAN 1S DEIWEN BY TURBINE hia USING STEAM OF 1t04-lbs. PRESSUEE. FIG. 4—TWO LAYOUTS SHOW DESIGNS OF STANDARD INDUCED BLOWER DRIVEN BY RECIPROCATING TURBO-DRAFT sists of a honey comb arrangement of thin sheet steel, and the air supplied to the furnace passes through nests of both horizontal and vertical channels. By this means, the period of heat ab- sorption is prolonged and the air is brought into contact with a maximum of heating surface. The temperature of the flue gases is thus reduced and this heat is applied to the air for com- bustion, which of course, increases eco- nomy. Advantages claimed for this system are: No outside separate space is re- quired as the apparatus is installed with- in existing construction. On account of the compact nature of its design, the weight is reduced to a minimum. By the simplicity and comparative ease of installation, the cost is low and it can be used to advantage on the smallest vessels. Operating cost is low because steam which has already done its work in the main engine can be used. The ENGINE AND THE INDUCED INSTALLATION cost of maintenance is low because no parts are subjected to great wear, and little care and attention is required in operation. Guarantees are given to their customers by the European distributors, Krebs & Co., Christiania, Norway, that an increase of 30 per cent in boiler capac- ity or a 10 per cent decrease in fuel consumption will result by the use of this system. The general advantages of any system of forced of induced draft of course apply and may be enumerated as fol- lows: An increase in boiler capacity or a reduction in size of boiler for the same power, a saving in fuel consump- tion for a given power; regulation auto- matically of combustion under all at- mospheric conditions; the possibility of burning fuel of an inferior grade; com- plete combustion and consequently a re- duction of smoke; lower and correspond- ingly lighter stacks with a resulting reduction in cost; cooler boiler room and November, 1924 less radiation from furnace fronts into the stoke hold making it -easier for men to work in this place; protection to the structure of the boiler due to more uniform temperature maintained in the furnaces. Late Marine Patents Copies of any one of these patents may be obtained by forwarding 25 cents in stamps to Siggers & Siggers, patent attorneys, National Union build- ing Washington, and mentioning MarINE_ REVIEW. 1492041—Life belt, ton, New Zealand. 1492114—-Means usable with mechanical tele- graphs for ships, John Stanley Wilson, Annan- dale, near Sydney, New South Wales, Australia. 1492400—Sectional boat, Eugene Schmiff, Scranton, Pa. . 1492583—-Submarine periscope, Adolf Steinle, Jena, Germany, assignor to the firm’ of Carl Harry E. Long, Welling- Zeiss, Jena, Germany. 1492614—Float, Martin Tworski, Vancouver, Ba 1492981—Ship, Myron F. Hill, New Rochelle, No oY: 1493215—Arrangement for gyro-compasses for preventing errors due to rolling of the vessel, Oscar Martienssen, Kiel, Germany. 1493489—Anchor, John A. Bork) Mich. 1493491—-Anchor rope wringer John A. Holzapfel, Jackson, Mich. 1493492—-Anchor rope pulley, John A. Holz- apfel, Jackson, Mich. 1493588—Sighting device for naval guns, Wal- ter Akeman, Essen, Germany, assignor to Fried Krupp, Aktiengellschaft, ‘Essen-on-the-Ruhr, Germany. 1493991—-Concrete ship, Herbert M. Knight, New York, 1493664—-Safety swimming belt, Albert Blum, New York, assignor of one-half to M. Schul- man and one-fourth to Solomon Joseph, both of New York. 1494545—-Anchor, John A. Holzapfel, Jackson, Mich, 1494639—Ship’s davit, Fred Simpson, ‘Blun- dellsands, near Liverpool and Arthur R. Thom- as, Woods, Hertford, England. 1494901—Life preserver, Frank Gudick, New York. 1495052—Marine clock, Frederick Wehinger, Waterbury, Conn., assignor to Waterbury Clock ‘Co., Waterbury, Conn. 1495330—Revolving life guard. land, Liverpool, England. 1495529—Raising sunken ships. no, New York. 1495569—Boat-launching mechanism, Charles W. Blake, Pleasantville, N. J. 1495688—Method and device for the salvage Jackson, and pulley, James Kirk- Jesse W. Re- of sunken ships. Bernhard Arthur Lennart Hasselberg, Stockholm, and Karl Gustaf Ost- berg, Neglinge, Sweden. 1495926—Submarine and long distance tele- phone system and method for operating the same. Ludwig Rellstab, Zeist, near Utrecht, Netherlands, assignor to Naamlooze Vennoot- schap de Nederlandsche Thermo-Telephoon Maatsckappij, Utrecht, Netherlands. 1496587. Life-saving suit. James F. Mordica, Philadelphia. 1496746—Submarine signaling device. Louis B. Slichter, Cambridge, Mass., assignor to Submarine Signal Co., Portland, Me. 1497444—-Marine engine governor. Thomas Jackson, Lewisham, London, Eng'and, assignor to Allan Ramsay, Folkestone, England. Sg a i ¢ :