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162 Electric Arc Welding for Marine Repairs One of the greatest needs in the marine field has been suitable means for making repairs, rapidly, econom- ically and conveniently. Of the va- rious systems developed during the last few years for this purpose, the electric arc welding system of the ©: & C .Electric & Mie... Co., Gar- wood, N. J., meets this requirement in all three respects. Several of the leading ship builders and marine re- pair companies have adopted this ap- paratus after exhaustive comparative tests and the results have been highly ' gratifying. The use of the electric arc as a source of heat for depositing metals is quite old, but its commercial de- velopment has taken place within the THE MARINE REVIEW BROKEN GAS ENGINE CRANK SHAFT ment for controlling the welding out- fit and the various welding circuits. One of the special features of the C. & C. system lies in the use of sep- arate control panels for the machine and for each of the welding circuits, thus making it possible to locate the WELDING MACHINE WITH CONTROL PANEL AND WELDING. PANEL last decade and the C. & C. company were the pioneers in this field. They began developing apparatus especially designed for this purpose nearly ten years ago and perfected their present system over seven years ago. Pat- ents were issued covering their sys- tem of automatic control for each of the welding circuits, thus giving each operator absolute control of condi- tions in his own circuit without inter- ference by any other operator work- ing from the same machine, and mak- ing possible the operation of any number of circuits from a single gen- erator. The C. & C. system of electric atc welding is based primarily upon the use of a specially constructed, low- voltage, direct-current generator driy- en by any suitable means, such as a motor, steam engine, gas engine, etc., together with the necessary equip- welding generator with its panel wherever desired and _ placing the welding panels near the jobs to be done. A distribution circuit is run from the main control panel out into the shop, or along the pier or even through a vessel, and the welding contro] panels tapped into this circuit, the same as would be done when connect- ing up an equivalent number of elec- tric motors: From these welding pan- els two cables are carried, one of which is attached to the piece worked upon, and the other to a suitable holder for the electrodes with which the work is done. Upon each welding panel is mounted the equipment for their patent system of automatic con- trol for each welding circuit. Extreme Flexibility One of the greatest advantages re- sulting from the use of the C. & € system of electric arc welding lies in its extreme flexibility, as it may be used on sheets, tubes, castings or forgings of iron, steel, copper, alumi- num and the various alloys of these metals. One of the most important applications, however, is for boiler re- pairs. Work of this kind can be done by merely drawing the fires and with- out dismantling. On work of. this class the welding is done by using an electrode consisting of wire of the proper composition, usually soft steel, and the work-is done by merely at- taching a lead from one side of the electric circuit to the boiler by any suitable means and drawing the arc between the job and the electrode, thus enabling the heat of the arc to fuse the electrode into place and fill up the opening. This method of weld- ing can be used for caulking leaky GAS ENGINE CRANK SHAFT AFTER WELDING 2s lings arg la BR i és