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

September, 1910 flattened screw prevents the screw from turning when raising. The method of raising the wreck has been worked out as follows: As soon as the cables are taut under the ship, but before any weight has been put upon Details of Saddle. Machined Threads M Dts bas z é ; . p © a < Ha : eo date «_) 1 Wn | : we Ht | . Ps | 4) SS : | ~ PO TR © | | UW ; sae Tm 4 TTT TN thle HLL O : | : et ey | | Fic. 6--Detats oF CABLE CLAMP, SCREW CONNECTION AND SADDLE ON Top or Cap, TAE Marine Review them, the working chambers of the cais- sons will be filled tight with sand so as to give an even and solid bearing of the caisson on the mud bottom and then the caissons will be pumped down to such a depth that the weight of water removed will nearly equal the weight of the hulk. In this way no weight will be placed on the mud at the bottom of the caissons greater than that on them during their sinking. This water hav- ing been removed, pipes carrying com- pressed air or water under pressure will be forced down along the sides of the hull of the Maine in order to loosen the 12-year hold that the harbor mud has taken on the bottom and side plates of the wreck. This grip having been lcosened, the lifting operation can com- mience. First, the screws will be operated lo- cally in such places as to raise the ves- sel to a horizontal position, both lateral- Iv and transversely, for she has settled on one side and down by the head. When this is done, the screws are all at different levels. As there is a large excess of strength in the cables and lift- ing apparatus, one or more pairs of screws are slacked off and the screws fleeted down their full length and then tensioned as before. This is repeated with all the cables until they are all ready fora full: Wit, <<Phen the: real lifting operation will commence. Mr. O'Rourke plans that about 1,000 men will be needed to man the jacks and suggests that the government detail a regiment of the army for that purpose. At any rate, each jack will be manned by at least eight men and, acting simul- 'taneously on signals, these men will lift each cable through a quarter turn of the 'head nut, a ratchet head being provided to insure that only a quarter turn can be made at one time. Thus the whole ship may be lifted through the 10-ft. length of the screws and one by one the cables can then be relaxed, the screw dropped and then again taken up and the raising continued. : This possibility of relaxing one screw and cable at a time is one of the main features of the design. It is computed that the cables and their screws are strong enough to bear safely four times the weight of the vessel, so that, if nec- essary, every other one of the cables could be released at the same time and the vessel could be carried safely on the remaining half. However, it is not in- tended to leave so many of the cables loose at one time, but the spacing be- tween cables, 4 ft., is quite, small enough sc thatthe two next cables, 8 ft. apart, can easily carry the load while the in- tervening cable is being relaxed and the screw lowered. Once the vessel has been raised above 361 the water, a platform can be built under her across between the two docks, and held as she is in the cable cradle, the kodies of the men can be removed, the hull examined and repaired and _ the vessel can be entirely refitted so as to leave Havana under her own steam. Autogenous Welding Plants on the Pacific Coast The Standard Boiler Works, Seat- tle, has recently installed a complete electric welding plant for making re- pairs on furnaces, boilers and ships. The plant is fitted on a barge which makes it possible for the company to do repair work quickly and at any place. A spur track leading to the company's shops has been put in, which enables them to, use the same plant for the repair of locomotives and cars. This is the first electric welding plant on the Pacific coast north of San Francisco, and its suc- cess is being carefully noted. The electric welder used by the Standard Boiler Works is the German make using two points, the plus terminal being attached to the welding stick which is used to fill the fracture. Among the work already done with the electric welder are repairs to the boilers in the steamers Sampson and Argo and a number of locomotives, which has been thoroughly satisfac- tory. The Commercial Boiler Works, Seattle, has recently added to its boil- er shop equipment, a complete oxy- acetylene welding and cutting plant. The equipment includes a_ stationary plant for use in the shop and a portable plant for use outside. The Commercial Boiler Works is making a number of very extensive tests on the adaptation of this welding process to its boiler repair work, and with the addition of the oxy-acteylene welding plant, is equipped to handle all kinds of boiler building and repair of what- ever size. The Anchor Line has contracted with A. Stephen & Co., Govan, Scotland, for two freight and passenger steamers for the Glasgow, Liverpool and Calcutta trade. These vessels will be 410 ft. long, 53 ft. beam and 32% ft. deep. It is announced that at the recent speed trial of the new battleship Dela- ware an average"speed of 21% knots an hour was maintained for four consecut- ive dhours under forced draft and 19 knots for 24 consecutive hours at nor- mal draft.