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July, 1919 The supposition was that the pinions at one end were jammed tight in mesh, and after this was 'corrected no further trouble was expected. The trial, however, resulted again in an abrasion of the gears, together with a scoring of pinion bearings which later were found to be directly due to im- proper fitting, all the load being car- ried on one bearing instead of being distributed on, the three. The tooth surfaces were smoothed up and a more - complete examination was made, which showed that the floating frames were not properly set, and were located in such a manner that: the frame was un- able to float and distribute the tooth load equally between the two helices. This feature is regarded as of para- mount importance in large gear con- struction, and in itself again might account for the injury to the tooth surfaces. . These ~ matters were A. 24-hour, full-power, loaded trial was then proceeded with,: at which time the: machinery operated. excel- lently... The tooth surfaces, however, had become abraded in earlier: trials which had automatically provided the necessary relief, and their behavior was excellent. This vessel proceeded to sea and after various vicissitudes has accomplished her first voyage, during the whole of which the tur- bines and gears operated excellently. Upon some days out from her home port, the' boilers were found to be salty and were delivering large quan- tities of salt into the machinery. On some three occasions the steam strain- ers had to be removed for the pur- pose of cleaning the salt therefrom. There were complaints of considerable fuel oil in the boilers, which, together with the scale-preventing compounds, caused excessive foaming. In view of these circumstances, the vessel returned to New York and later at- tempted another voyage, this time put- ting into Bermuda on account of her inability to maintain steam. It is re- ported that difficulties were encoun- tered on account of the heating and pumping of fuel oil. Following this, the vessel completed her voyage with- out further incident and with com- plete satisfaction so far as her pro- pelling machinery was concerned. ~ In the meantime, work was proceed- ing on succeeding ships. The next ves- sel, the Atcona, had her machinery as- sembled and defects of workmanship corrected, as had been done on...the AGAwAm. Nevertheless, scoring of the tooth surfaces was encountered, and it was for the first time realized that the fundamental difficulty was on account of the particular form of involute tooth. Corrections..were: made to these. cor- rected -by: the beginning of December. THE. MARINE REVIEW teeth by relieving the tips of the pin- ions, which while reducing the arc of contact, and hence increasing the tooth pressures, enabled the gear teeth prop- erly to maintain their oil film. and work in an entirely satisfactory manner. The four succeeding ships were imme- diately treated in this manner and two of them, the Atcona and ALAmosa, are now at sea. For later ships, the gears have been returned to the manu- facturer and new pinions have been pro- vided which have been cut with a more approved form of involute teeth. The first of the ships thus fitted -has com- pleted her light power trials. There are now on 'the ground, available for the shipbuilders, a ne of complete sets of gears. 'Has Launched 33 Ships The. American International Ship- building Corp. from its Hog island yard at the end of May, had launched 33 vessels, of which number 19 had been delivered. On May 30, five vessels were launched within 80 minutes. These were 7800-ton.. steel freighters. The first vessel to be launched by the yard was the QuistconckK which took the water Aug. 5, 1918. The 33 vessels have thus been' launched: within a period of 9% months; Develops Welding Fillers Seven or eight years ago, the Central Steel & Wire Co., Chicago, points out, iron wire with a small percentage of carbon was used in all welding opera- tions. The company has carried on ex- haustive experiments to adapt the cor- rect material to all classes of welding so that at the present time it has de- veloped materials to cover various classes of work. The company's prod-/ ucts are now used for acetylene and electric welding on cast iron, cast steel, vanadium steel, nickel steel, chrome nickel steel. and railroad track work. It is pointed out that by using the proper medium for each material to be welded, the efficiency of the process and the strength of the finished work is im- proved. Explains Trade Routing The Irving National bank, New York, has just issued a book, Trading with the Far East, which is a companion volume to Trading with Latin America. It gives facts and information for the "man who is too busy to. gather them first hand, and outlines effective ways of meeting the problems arising in con- nection with the routine of trade ac- tivity in the Orient. In acquainting the manufacturer or exporter with out- standing factors in trade beyond the Pacific, it provides an interpretation «been 349 for commercial purposes of conditions in what promises to be an excellent .market for. years to come. Makes Excellent Record On' May 30, the Submarine Boat Corp., Newark, N. J., completed a launching record of 52 vessels in 52 weeks. In the last six days of the fiscal year seven vessels were launched. At the same time deliveries of vessels at the corporation's yard are rapidly catching up. with the launching program. Twenty - seven vessels are, now complete, 16 having delivered during May. The yard's record for the fiscal year end- ed ars 30 follows: Way j : No. Launched Name Comp'eted ' 1--May 30,°18..:.Agawam......./... Oct. 1, 18. July #718,» Alamosa i 0% oe March 26, 719 3--July 4,718.4... Alcona. soe. March 16, 719 4---Aug, S118). : Ingold=...% 255.4... April 7, 719. 5--Sept. 12,'18.+. .Charlot............April 9, 19 6--July 4, 718..... Chetopa T--Sept. 22,18... Cokato......5..4 0. Feb. 27, 719 8--Noy. 23, '18....Decatur Bridge...... May 2, 19 9--Dec, 15, '18... .Ft. Pitt Bridge...... April 23, 719 10--Sept. 12, 18... Monana 11--Aug. 31, 18... Phoenix Bridge. .....March 27, 719 12--Nov. 23, 718... .Chicago Bridge. 2: May 8, 719 13--Dee. 15, '18....Mt. Vernon Bridge... April 17, 19 14--Septs 22; 18... Panola... 3026, May 3, 719 15--Sept. 28, 718... Onekama........... April 18, 719 16--Feb. 8, *18..... JOkVl ewe ole seas May 12, '19 ' 17--March 2, 719. .'. Milwaukee Bridge 18--Oct. 6, '718..... Hico eees April 6, 719 19--Oct. 6, °18.....Opelika............ May 9, 719 20--Feb. 16, 719... .Passaic Bridge...... May 15, 719 21--March 12, 719... Opequan........... May 29, 719 22--Oct..14, 18.3.5 Allies 4 0 ous May 27, 719 23-- Oct. 14,18... .Consort:........... May 19, 719 24--March 2, 719... Bethlehem Bridge... May 29, 719 25--April 18, 719... Wisconsin Bridge... . 26--Dec, 28; '18...,. Faraby............ May 26, 719 27--Jan. 25,°18.....Farmam............ May 7, '19 28--April 19, 719... Jackson 1--March 27, 719. . Louisville Bridge 3--Feb. 16, 19... .National Bridge... .. May 26, '19 6--Feb. 8, 719..... N@SCOs i os. sac ae 0 '/May 20, '19 2--Web. 16, 719... ..Masca..2........; May 23, 719, 11--March 27, 719. . Knoxville i 4--March 30, 719. . Anniston : 10--March 30, '19..-Chattanooga........ May 28, '19 5--March 31, '19.. Montgomery 14--April 9, 719.. .St. Augustine 7--March 12, 719. . Bound Brook 15--April 30, '19... Brasher 18--April 26, '19... Johnson City '19--April 19, '19... Shortsville 22--April 30, 719... Jefferson County 23--April 13, 719... Hillsborough County 124-May 15, 719....Dade County © 8--May 15, 719... .St. Johns County 9--May 27, '19....Davidson County 13--May 27, '19. +. » Wallkill 3--May 30, 719. . .Assinippi 27--May 24, '19....Boston Bridge 6--May 24, '19....Bay Head 2--May 30, 719... .Calno 24--May 30, 719... . Pawtucket Reports from Norfolk, Va., state that a contract has been signed for the construction of a $7,000,000 shipbuild- ing plant for the Norfolk-Hampton Roads Dry Dock & Ship Repair Corp., at Lambert's point. The site Dice _ about 160 .acres..of land.:4- 2. uy)