. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . le perhapsabout I 1-4 in. of metal is upsetto form the collar, which ultimatelymakes the valve face. At the sametime, the collar thus formed ispressed over projections in the die, sothat when withdrawn from the machine,the cavity between each wing, underthe newly-formed collar, is smoothly anddefinitely formed. The bars with theserudimentary valves on the ends aresheared in the middle, and the valvesthen appear as shown in the second evo- Antiquated Methods of Testing AirBrakes. It seems rath
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . le perhapsabout I 1-4 in. of metal is upsetto form the collar, which ultimatelymakes the valve face. At the sametime, the collar thus formed ispressed over projections in the die, sothat when withdrawn from the machine,the cavity between each wing, underthe newly-formed collar, is smoothly anddefinitely formed. The bars with theserudimentary valves on the ends aresheared in the middle, and the valvesthen appear as shown in the second evo- Antiquated Methods of Testing AirBrakes. It seems rather pathetic nowadays whena leading railroad reports that the airbrakes on a- fast freight train must waitfor test until the locomotive is backeddown from the shops and coupled to thetrain, and when a full hour is consumedin the testing. Yet this is the situationon some of the railroads which otherwisehave a claim to greatness. The time oftesting will be largely reduced if the yardsare equipped with testing plants where animportant train may be tested while it isbeing made up, or immediately A VIEW OF THE IENNA. K. R. .\1R-BR.\KE INSTRVCTION ROOM .\T IRENTON, N. J. riaking Air-Pump Valves. The Chicago & Northwestern Rail-way have succeeded in making thevalves used in their Westinghouseair pumps, and of making them very sat-isfactorily and very cheaply. A bar of7-8-machine steel, about 11 in. long,is heated, and one end is thrustinto the jaws of a forging machine. Thejaws grip the bar, while the dies closing lutionary stage reproduced in the illus-tration. The third stage is completed veryquickly in a turret lathe. The shankends are held in the jaws of the chuck,and the ends of the wings are cut off,their sides trued up, the bevel valveface is formed, and the valve is cut off;the whole thing being done in four suc-cessive operations conducted very rap- 26 RAILWAY AND LOCOMOTIVE ENGINEERING January, 1903. idly. The shank which remains is sub-sequently threaded to make a st
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
