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8 SS TRIPLE-EXPANSION ENGINES OF THE INDIANA. A large illustration and a description of the U.S. Battleship Indiana appeared in the RECoRD of November 14, This week, through the courtesy of the American Society of Naval Engineers, we are enabled to present an engraving of one of her duplicate triple-expansion engives. These are two vertical inverted, direct-acting, triple- expansion engines placed abreast of each other in sepa- rate water tight compartments, the high pressure cylin- ders being forward. Bach cylinder is supported by an inverted Y frame on one side, and by two hollow forged steel cylindrical col- umns on the other. The intermediate and low pressure cylinders are steam jacketed on the sides and bottom, but the high pressure are not, but are fitted with work- ing liners. There are no starting valves on the cylin- ders, provision being made for starting the engines by admitting live steam to the receivers. The relief valves for the cylinders are placed on the valve chest casings, on connections between the steam and exhaust sides of the main valves. There are two receivers for each en- gine, consisting of exhaust pipes and valve chests, the safety valves of which are set at 100 pounds for the I. P. and at 60 pounds for the L. P. The main valves are of the single ported piston type, there being for each en- gine, one for the H. P. and two for the J. P. and four for the Ly. P. cylinder. They are provided with balance pis- tons, the cylinders of which form part of the upper covers of the valve chests. The valve gear is of the Stephenson type with double bar links. There are no independent cut-off valves, but pro- vision is made to cut off in each cylin- der, varying from.5 to.7 of the stroke, by means of a block to which the sus- pension links are attached, which block can be moved by hand screw gear in a slot in the end of the arm on the reversing shaft. The main pistons are steel Castings, dished, and each are fitted with two packing rings 5 inch wide and % inch thick. The piston rods and connect- ing rods are of forged steel. The cross-heads are of forged steel, and each has a manganese bronze slipper, the sliding faces of which are fitted with white metal. The crosshead guide to take the thrust when going ahead 1s of cast iron bolted to the in- verted Y frame. The backof the guide is recessed and covered with wrought- iron plates to form a passage for cir- culation of water. Cast iron lips are bolted on each side of the go-ahead guide to take the thrust when backing. The eccentrics are of cast iron. Bach backing eccentric is securely keyed on the shaft, and each go-ahcad eccentric is secured sto the corresponding backing one by through bolts in slotted holes. The eccentric straps are of com- position, faced with white metal, and the eccentric rods of forged steel. Thel. P. and lL. P. valve stems have manganese bronze crossheads which take hold of the link blocks directly. Hach engine bed plate consists of three sections of steel castings. The steam reversing gear consists of a cylinder 14 inches in diameter and 20 inches stroke, secured to an engine Y frame, the piston rod being connected to an arm on the reversing shaft. The valve is moved by a hand lever and is controlled by a floating lever. The hand reversing gear consists of a wheel, worm shaft, pinion and rack, the latter being connected to an arm on the reversing shaft. j There is a double cylinder, simple, inverted,’ turning engine with cylinders 7 inches in diameter and 7 inches stroke, secured to the high pressure Y frame. It drives a worm wheel on the forward end of the high pressure crank shaft by means of worm gearing and a second worm; the latter is made to slide on a feather key, and is held in place by a collar below and a removable key above it. A ratchet is fitted to the shaft of the engine for turning by hand. Each main engine is fitted with a disc stop valve 13 3 inches in diameter, having a screw stem and a balance piston, and a butterfly throttle 15% inches in diameter. THE MARINE RECORD. The main steam pipes are of copper and strengthened with steel bands 6 inches apart. In the port engine room there is a distributing oil tank supplied from the main oil tanks by a Brake du- plex pump, steam cylinders 2 inches in diameter, oil cyl- inders 1% inches in diameter, stroke 234 inches. The tank is fitted with an overflow pipe. Distributing pipes lead to to the various manifolds, which are fitted with adjusting valves, and from the manifolds tubes lead to the various parts to be lubricated. The suction pipe of the pump is fitted with a strainer. Cylinders, number for each Engine: 2.7) joic gcc ajo ssicists ve aes es episinins sae 3 diameter of HPT, 1nches A154... scktsannicaaaae cts tae tes 34 7-16 diameter of I. P., inches ....4 Pon TT I “8 ae” diameter, of LinP.,,inches.c.i sis coals code ta wee ad megs winsleatshs 75 Stroke:of pistons, 1WCMeS seo eto c pteisis wpe ares viviate soe Sloserart niaie wicieisiniatoraiefels 42 Valves, diameter of H. P, (one for each cylinder), inches... ........ 17 diameter of I. P. (two for each cylinder), inches... cteaistaves 17 diameter of L, P, (four for each cylinder), inches ........... 17 Balance pistons, diameter of H. P., inches ..............ccceeecenee 5K diameter of I, P., inches, ., 54 diameter of L P, inches. 7 Valve stems, ae P. [1] diameter, INCHESca Acme 254 P. [1] diameter through valve, inches , 134 r ‘By [2] diameter, inches,...........06. 25% HPD) diameter through valve, inches 1% LP, [4] diameter, inches;.... ...... 7 954 L P. [4] diameter through valve, inches. 1% Main steam pipe [18 inches diameter] area of cross section, Square INCHES /isisjaiveds tojaee ia kelralpisics siettel elias leleeiaaes 182.73 Exhaust pipe to I. P. cylinder [16% inches diameter] area of cross S€Clionssgare INCHES | 7eeike Miess cielde clsece dete more 213.82 to L. P. cylinder [20% inches diameter] area of cross section, square inches ,,......... 330.06 BBR a TRIPLE EXPANSION ENGINE U. S. S. INDIANA. to condenser [2] [18}4 inches diameter] area of com- bined cross sections, square inches.............-. 537.6 Volume swept by H, P. piston per stroke, eubicutes tawanete- eee 22.17 LP. piston, perstroke. , fee ee cubic feet, . 43.69 Port, cubicfeet,......; 43.51 L, P, piston, per stroke, cubic feet F Ratio of net area of HH P. to I.’P, pistons, 1.97 1, P. to L. P. pistons, 2.45 Hi, Be tolePpistonst ass eucks. tie ¢ 4.82 Starboard .. } a Pee Clearance of H. P. cylinder, per cent, . 2286 Port . aq MODE Coy ons 14.76 Poe arnicn wee Dak ke 12.03 Clearance of I. P, cylinder, per cent , Seebost et a. {Pope 22.88 4) Port fTops..ccsas 12,10 stare eye Sists ey 22.05 tarboard OD eeisecicss 9,09 Clearance of L, P. cylinder, percent. , : *{ Bottom.,... 19.59 uy) Port Re Ree 9.09 Becereets Bonows.z- 19.28 Piston rods, diameter, inches, . . lekaie 7 length from piston to crosshead, feet and inches. .//717, 5-554 Connecting rods, length from center to center, feet ...........sc000; 7 diameter of Upper end, WMChes. cscs ccs acess 654 diameter of lower end, SOCRESS oft, eee ae eae 8% thickness [si es as faced], MICHES Haut, se evitamin cs te 6% crosshead bolts [4], diameter, inches,............... 8 crank pin bolts [2], diameter, inches... See aes 4l4 Crosshéads, surface |ahead], square inches. ..............cccecceees 44634 surface {backing}, Siiiaresinchess. tes acetic. Sancta 35244 Pius, diameters MChes a kw ccc cchacsiseveleguat sc vecwele 1% pinsvlength pinches4 | ikki AG va ek hehe eees 9% Reversing gear, steam cylinder, diameter inGhes woe easter 4 14 Stroke niches are tre ees ce heGe can: Mates. te 20 THE MARINE RECOBD is the repository for all en- gineering and nautical publications. Hydrographic charts always on hand. TRADE AND INDUSTRIAL NOTES. Mr. J. S. Mundy of Newark, N. J., the Hoisting En- gine builder, has a contract for the New York Central and Hudson River Railroad for building their new draw- bridge engine for the Spuyten Duyvil Creek draw. This drawbridge has a span of 290 ft. The engine has double cylinders with reverse link motion and operates two lines or steel shafts, 434 in. in diameter, by gearing for opening and closing the draw. The engine is spec- ially arranged for operating their temporary lift draw that is now in use across the Spuyten Duyvil Creek, and as soon as the permanent drawbridge is erected will be transferred to the new draw. Allthe material entering into the construction of this engine is of the highest grade, and workmanship of the very best. Blocks for the Holland submarine torpedo boat have been laid by the Columbian.Iron Works, says the Balti- more Sun, and Mr. Holland, the inventor of the beneath- the-sea destroyer, is prepairing the working drawings. Most of the frame of the boat is bent. She is to be 84 feet long and 11 feet diameter. All the frames for the three 160-feet-long torpedo boats are ready for erection and the machinery is almost ready to be assembled. L. H. McMutrie, late of the shipbuilding department of the Maryland Steel Company at Sparrow’s Point, is now at Seattle, Washington, superintending the construction of a torpedo boat similar to those for which the Columbian Iron Works has a contract. Hinkle Furnace, of the Ashland Iron & Steel Co., of Ashland, Wis., eclipsed in 1895 all its previous records of production, turning out 40,631 gross tons of charcoal pig iron in 350 days’ running time, or an average of over 116 tons per day. This is the largest quantity of charcoal pig iron ever prc- duced by asingle stack during a simi- lar period of time in this or any other country. The next best year’s work of the furnace was 38,304 tons, made in 1892. Noah W. Gray is manager of the furnace and L. E, Dunham is as- sistant manager. lL. Boyer & Sons, No. 90 Wall street, New York, have sent out a new de-_ scriptive catalogue of the Boyer Pat- ent Sectional Water Tube Boiler. This boiler, as stated in the catalogue, is made for steam vessels of all sizes, from the sinallest launch to the ocean greyhound, and also for stationary and portable purposes. The catalogue also contains an illustration of the fast steam yacht Rex, which is fitted with a Boyer boiler. The Joseph Dixon Crucible Co. is sending out a valuable circular to cus- tomers in regard to the proper treat- ment of crucibles. It is carefully and well written by John A. Walker, of Jersey City, vice president of the company, and con- tains much valuable information. ‘The properties and circumstances which cause crucibles to crack or scalp, shortening their lives, are fully set forth. It is reported that surveys have been made at Lewis- ton, N. Y., on the Canadian side, for a railway suspen- sion bridge to span the gorge between Lewiston and Queenstown, Ont. The Niagara Falls Park Railway Co. and the Gorge Electric Road are mentioned in connec- tion with the project. American and Canadian com- panies already possess charters for the construction of a railway bridge at this point, and the matter of build- ing it will be decided in a few weeks. At the annual meeting of the Carnegie Steel Co., Limited, held in Pittsburg, the following board of man- agers was elected: H. C. Frick, John G. A. Leisham, W. H. Singer, H. M. Curry, F. T. F. Lovejoy, L. C. Phipps, John Pentefract, Charles M. Schwab and Alex. R. Peacock. The board organized by selecting H.C. Frick as chairman; John G. A. Leisham, president; L. C. Phipps, vice-president and treasurer; F. T. F. Love- joy, secretary. ' The additions to the plant of the Springfield (Ohio) Machine Tool Co. are now completed and with the new tools installed the plant becomes one of the most com- plete machine tool manufactories in the country. The