JOHN C. ELLIS, Prest. CHAS. G. ELLIS, Treas. WALTER MCQUEEN, Sup't. RAILROAD MACHINERY, TIRES, &c., &c. SCHENECTADY LOCOMOTIVE Schenectady, N. WORKS Continue to receive orders, and to furnish with promptness the best and latest Improved Coal or Wood Burning Locomotive Engines. ALSO REPAIR AND REBUILD LOCOMOTIVES. The above Works, lo ated on the N. Y. C. R. R., near the centre of the State, possess superior faculties for forwarding work to any part of the country. In coupled engines the adhesive force is due to the load on all wheels coupled to the driving wheels. The adhesive power must exceed the tractive force of an engine on the rails, otherwise the wheels will slip. For loads on driv ng wheels, see below. DISTRIBUTION OF WEIGHT IN LOCOMOTIVES. The average distribution of the weights of a six-wheeled locomotive on its wheels is: Assuming the total weight of the engine in working order to be 1; Passenger engines, narrow gauge, average... from 20 to 30 tons. 100 100 24 to 32 66 TRACTIVE POWER OF LOCOMOTIVES. Let D "P " L "W Diameter of cylinder in inches. Mean pressure of steam in cylinders in lbs. per square inch. Diameter of driving wheel in inches. Tractive force on rails in lbs. will equal D2 PL W EFFECTIVE PRESSURE OF STEAM ON PISTON. With Different Rates of Expansion.-Boiler Pressure being assumed at 100 lbs. per Effective pressure. stroke = 90 square inch. = 80 TO FIND THE LOAD WHICH AN ENGINE WILL TAKE ON A GIVEN INCLINE. Let G = Resistance due to gravity on the steepest gradient in lbs. per ton. See page 151. R = Resistance due to assumed velocity of train in lbs. per ton. See page 151. "T=Tractive power of engine in lbs. as found above. "W Weight of engine and tender in tons. The load the engine can take in tons, including the weight of the waggons, but not that of engine and tender will equal T GR = W. ANDERSON & WOODS, PITTSBURGH, PA. REVERSIBLE STEEL FROGS. Best Refined Tool Steel, R. R. Cast Spring Steel, Frog Points, Side Bars, Slide Bars, Connecting Rods, Locomotive and Car Axles, Crank Pins, Piston Rods, Cast Steel Crow Bars. FORCINGS OF ANY DESCRIPTION MADE TO ORDER. FROGS AND CROSSINGS MADE TO ANY ANGLE, OUR FROGS ARE NOW IN USE on the FOLLOWING ROADS: New York Central & Hudson River Railroad. Allegheny Valley Railroad. Fittsburgh, Washington & Baltimore Railroad. Louisville & Nashville Railroad. Oil Creek & Allegheny River Railroad. Union Railway. Houghton & Ontonagon Railroad. St. Louis & Iron Mountain Railroad. PAT: APR. 7. 1868. H R = The resistance of curves may be reckoned as 1 per cent. for each degree of the curve occupied by the train. Imperfections of road vary from 5 to 40 per cent. Strong side winds.... 20 miles per hour. .... Resistance on straight 812... 914 ... 101⁄4 line in lbs. per ton... Do., with sharp curves 13 and strong wind*.... 34 * 50 per cent added to resistance on straight line. Resistance Per Ton. 151 HERMANN BOKER & CO. PROPRIETORS OF THE TRENTON VISE and TOOL WORKS, AND IMPORTERS OF German and English Hardware, 101 & 103 DUANE STREET, H. BOKER'S Unrivalled Scissors, Pocket Cutlery & Hardware. Sole Agent of the Celebrated Cimlet Bit, No. 679. PETER WRIGHT'S Anvils, Trace and Coll Chains. STUBS' Taper Saw Files, Adams' Punches. BUTCHERS' Files, Tools and Razors, “Goodlad” Files. MANHATTAN Cutlery and "O. K." Razors. LAMSON & GOODNOW M’F'G CO,, Table & Butchers' Knives. WILSON'S Butcher Knives and Steels. LINACRE'S Grass Hooks and Crain Sickles. T. WALDRON'S Scythes and Straw Knives. ENGLISH and CERMAN Cuns, Caps, &c. CERMAN Halter and Coil Chains. SEND FOR AN ILLUSTRATED PRICE LIST. |