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304 W. Burkett, Columbus, O., assignor to the Burkett Mfg. Co., Columbus, O 1,225,498—Torpedo guard for war Nikolaj F. Rodiziekevitch, Farrell, Pa. 1,225,662—Submersible vessel. Albert John Frederick Lee, West Ealing, England. 1,225,702 —— Internal combustion George E. Davol, San Francisco, Cal. 1,225,703—Fuel valve for internal combus- tion engine. George E. Davol, cisco, Cal. 1,225,796—Automatic fog safety ship’s guide. Otto Fricke, New York. 1,225,824 — a Henry W. Kippes, Brooklyn, N. 1,225,913— Rudder control. Frank W. Wood, Montclair, N. J., assignor to Charles: Cory & Son, Inc., New York. ships. engine. San Fran- 1,225, 992—Turbo- -generator for ships. Rob- ert V. Morse, Ithaca, N. Y. 1,226,014—-Propulsion mechanism. George W. Rundle, Columbus, 1,226,055—Life-saving device for ocean ves- sels. Frank Bohn, Chester, Pa. 1,226,095—Row boat. George G. McDonald, St; cBsprit, N.S. ‘1,226,098—Safe for seagoing vessels. Thom- as McWatters, Chestnut Ridge, Pa. 1,226,141—Navigation protractor. Frank W. Sterling and Ralph A. Koch, U. S. navy. 1,226,274—Life raft. George F. Sweeney, Boston; Margaret Sweeney, Boston, adminis- quipn THE MARINE REVIEW tratrix of said George F. Sweeney, deceased. 1,226,348—Submarine mine and propeller en- tanglement. Arthur N. McGray, New York. 1,226,699—Boat. Frederick L. Saunders, Green Bay, Wis. 1,226,878—Means for securing ships’ hatch- ing coverings. Joseph Lunt Gordon, Liver- pool, Eng. 1,226, $81—Device for covering holes in ves- sels. Thomas R. Hatton, Appleton, Wis. 1,226,944—Life boat and the like. Harry W. Broady, Bayside, N. Y., assignor to Welin Marine Equipment Co. 1,227,093—-Safety appliance for ships. Aloys- ius °S: "Terhaar, San Diego, Cal. 1,227,247—Collapsible boat. William H. Cox, Portsmouth, Va., assignor of one-half to Charles C.- Brick, Salem; O 1,227,284—Life saving boat. Thomas Mc- Waters, Chestnut Ridge, Pa. 7,357—Propeller chamber or tunnel for shallow draft vessels. Harold E. Yarrow, Glasgow, Scotland. 1,227,784—-High speed motor Cooper Hewitt, Passaic, é 228,048 — Piston for internal combustion engines. George R. Rich, Oak Park, IIl. 1,228,049—Piston and internal-combustion en- gines. George R. Rich, Oak Park, Ill. 1,228,072—Rotary internal combustion gine. John M. Siner, Parish, Fla. 1,227,688—Starting device for internal com- craft. Peter en- rent Used Afloat and Asi August, 1917 Arthur L. Strahle, Nebr. bustion engines. Benson, and Hiland B. Notes, Omaha, 1,228,094—-Motor attachment for boats. Brit- ton E. Byrd, Durham, Cc é 1228401—Rotary explosive engine. Albert W. Bruce, Bloomfield, Iowa. g 1228437—Tube cleaner for marine boilers. Jinkichi Hikida, Toyama-Ken, Japan. : 1228628—Spark plug for gas _ engines. Charles R. Winston, Richmond, Va. 1228677—Ventilator cowl for ships. John Jenkins, Dalmuir, Scotland. : 1228787—Propeller. Franciszek Kowalski, Philadelphia. : 1228806—Internal combustion engine. Louis S. Morris, Bridgeport, Conn. 1228922-—Wooden boat. Edward S. Hough, Oakland, Cal. 1229123—Life raft. Loring Willis Myers, Lubec, Me. 1229340—Internal combustion engine. John W. Smith, Philadelphia. 1229350—Spiral propeller for ships. John J. Tobin, Sayre, and Frank J. Gallagher, Wilkes- Barre, Pa. 1229583—Means for propulsion. Horace M. Cake, Washington. 1229713—Mechanical air-borne ship. George Albert Chaddock, Broad Green, Liverpool, England. 1229729—Vessel propelling device. Calvin H. Edinger, Fairview, W. Va. lOre Pneumatic Hammer for Calking, Beading and Chipping NEW type of pneumatic hammer A especially adapted for all classes of calking and beading and for chipping all kinds of castings, steel bil- lets, boiler plates and structural iron, has been developed by the Dayton Pneu- matic Tool Co., Dayton, O. This com- pany has recently moved into a new, specially equipped plant which is said to be the only plant devoted exclusively to manufacturing pneumatic hammers. This hammer has long bearing sur- faces which are said to increase the life of the tool almost one-half. The hammer contains only 12 parts, all. sim- ply designed. The company’s hammers have been in service for some time. The hammer illustrated is adapted for medium chipping, calking and beading. It weighs 1234 pounds and is 133% inches long. Five other types are built to handle lighter or heavier work. Colored Gage Glasses for Marine Boilers By Theodore Osborne It is desirable for a boiler attend- ant to be able to see at a glance the exact level of the water in a boiler. It frequently happens, however, that owing to defective lighting and other unsatisfactory conditions occurring in a stokehold a close inspection of the glass is necessary in order to ascer- tain the water level. This is especial- ly true when protectors are used, or when the gage glass is at a consider- able height above the floor level, as is the case with water tube boilers. Under such circumstances, the attend- ant may mistake an empty glass for a full one and disastrous results may follow. A simple device has been de- veloped recently for removing this difficulty. The apparatus is designed to color the water in the gage glass red, and by that means to enable the level to be readily seen from any angle HAMMER ADAPTED FOR CHIPPING, CALKING AND BEADING and from a considerable distance. The coloring device consists of a_ small gun metal reservoir, which can be screwed into the top fitting of any water gage in place of the usual plug. When it has been placed in position, the reservoir is filled with water to which coloring matter is added and the reservoir is then closed by a screwed plug in its upper end. The colored liquid slowly drops into the water in the gage glass and keeps it a bright ruby tint in spite of the slow diffusion of the coloring matter into the boiler. The feed is maintained by steam, which leaks past a small valve in the stem connecting the reservoir to the water gage fitting. To increase the rate of condensation the reservoir is provided with copper fins, which are coated with a form of carbon. The coloring matter is stated to be entire- ly innocuous and there is no chance of staining the gage glass. It is also claimed for the coloring matter that the great temperature to which it is subjected does not destroy the color distinction. Nor do the salts often found in solution in boiler water af- fect it. The apparatus, in addition to being simple in action, is entirely au- tomatic and requires no attention, ex- cept that it has to be refilled from time to time. Having been once re- plenished it will-continue in action for about four weeks. The gage glass can be blown down as usual and no coloring matter from the reservoir is lost in the operation. It is stated that the idea of coloring the water in the gage glass in a distinctive manner originated in Germany. Since war was declared by Great Britain, it has been appropriated by British makers.