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

Equipment Used Afloat and Ashore Combination Short and Intermediate Wave Radio Equipment — Large Rubber Stern Bearings— An Economical Steam Trap — Building up by Welding ACKAY Radio & Telegraph Co. 67 Broad street, New York, is installing its new type ship radio equipment and Kolster radio com- passes (direction finders) on the five new Baltimore Mail line ships, Crry or BALTIMORE, City OF NORFOLK, Crry or Newport News, CiTy OF HAvreE and City or HAMBURG. These new ship radio telegraph equipments are of a unique design combining both short wave and in- termediate wave operations in one panel, using one vacuum tube and one motor generator, in contrast with the usual practice of using a complete separate unit for short waves. This ¢ Mackay Radio, Combination Short Wave and Intermediate Wave Ship Equipment results in compactness and a mini- mum of space for all types of ships. Similar equipment has been installed on the four new American Export line ships. These*® vessels are the EXcaLt- BUR, EXETER, ExXocHoRDA and Excam- BION. Large Rubber Bearings HAT was unique yesterday or W tne day before, becomes common- place and accepted practice today. Many a shipbuilder and ship operator no doubt shook their heads in doubt when it was suggested that instead of lignum-vitae wood lining for stern bearings, rubber be used. It seems inconceivable that rubber in any form could stand such tough sery- ice. Experience, however, shows that it will stand up, properly installed and lubricated, better than any other type of bearing. 74 Goodrich cutless rubber bearings were installed on the HARVESTER of the International Harvester Co., at the Chicago Shipbuilding Co. The stern bearing on this ship is for a shaft 12% inches in diameter. A similar type of bearing is installed for the rudder pintle. These pintles are 6 inches in diameter. The Canadian vessel LAVALTRIE, owned by the Dominion of Canada, department of marine, is equipped with two cutless bearings for 7 15/32 inches shaft. Economy of Operation Is Claimed for New Trap NEW and unique steam trap has recently been put out by the Cc. J. Tagliabue Mfg. Co., Brooklyn, for which unusual economy in oper- ation is claimed. The new.and ex- clusive differential setting feature makes it possible for the trap to dis- charge condensate at a temperature corresponding to a uniform differen- tial pressure from 0 to 20 pounds be- low the operating steam pressure. If the trap is set to discharge conden- sate at a temperature corresponding to as much as 20 pounds less than the operating steam pressure, it will discharge the condensate at this dif- ferential regardless of whether the steam pressure is 50 pounds 75 pounds, or 125 pounds and without any further adjustment of the dif- ferential setting. Reversible as well as renewable monel seats and disks are fitted two for one in every trap. By unscrewing and reversing the seat the outlet end becomes a new seat and inverting the disk, the reverse, extra disk is brought into play. The trap is made in the one-inch size only as the full 5 /16-inch valve opening assures ample capacity and permits of easy interchangeability on every steam line. Overcome Effect of Salt Water by Oxwelding N their return trips, after hav- ing discharged their cargoes, oil tankers frequently carry sea water as ballast. As the same cargo pumps handle both oil and ballast, the pumps are subjected to the corrosive action of sea water. One oil company re- cently found that the cargo pumps on one of its tankers had corroded so badly as to interfere with operation. MARINE REVIEw—August, 1931 A contract welding shop was con- sulted and it was found that the cor- roded areas of the pump castings could be restored quickly and econom- ically by oxwelding. The pumps were dismantled and the two 2-ton castings removed to the welding shop. The corroded surfaces were cleaned and prepared for welding with cast iron welding rod. A temporary brick pre- heating furnace was built around the end of the casting containing the cor- roded sections and this part was pre- heated for about 4 hours using char- coal for fuel. The corroded sections on the upper face of the casting were repaired first. A portion of the front of the Building Up Damaged Areas With Cast Iron Welding Rod preheating furnace was then re- removed to permit the welding of corroded areas in the cylinder bore. Only about 5 hours actual welding time was required for each casting. When the welding was finished, the castings were preheated to an even temperature; then allowed to cool very slowly. About 100 pounds of cast iron welding rod and one pound of Ferro flux were required for the work on the two castings. When the surface of the casting was planed down to permit placing the cylinder head in proper position, the interior showed the weld metal to be perfectly sound and free from blow holes. No difficulty was experi- enced in machining the welded sec- tions of these castings showing that the weld metal was the high quality gray iron which is easily obtained by following the correct procedure for oxwelding cast iron. Linde Air Prod- ucts Co., 205 East Forty-second street, New York manufactures ox- weld apparatus and supplies.