. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ereby theexhaust of brake-cylinder pressure on the head and rearends of long trains is accomplished more uniformly. Influence of Modern Traffic Conditions The standard triple valve, for freight service, has beensteadily improved and is today a very refined, as well as,successful piece of apparatus. It is called upon to charge,apply and release the brakes which it performs automati-cally in response to changes in brake pipe pressure. Itrequires for its successful manufacture the best of talent
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ereby theexhaust of brake-cylinder pressure on the head and rearends of long trains is accomplished more uniformly. Influence of Modern Traffic Conditions The standard triple valve, for freight service, has beensteadily improved and is today a very refined, as well as,successful piece of apparatus. It is called upon to charge,apply and release the brakes which it performs automati-cally in response to changes in brake pipe pressure. Itrequires for its successful manufacture the best of talent,proper consistency of materials composing its structureand the greatest of care in testing to determine beyond a May, 1928 RAILWAY AND LOCOMOTIVE ENGINEERING 127 doubt, if all the conditions surrounding its assembly,lubrication and adjustment meet the specified require-ments. All this is essentially necessary to insure a devicethat may be depended upon to perform the functions thata triple valve is called upon to accomplish, that of apply-ing and releasing the brakes under the cars in all lengths. ^ro*u« Ml. Sect ion of the L-Type Triple Va Ive 2 Bodv 13 Check-Valve Case 25 Bypass Piston 3 Slide Valve 14 Check-Valve-Case Gasket 26 Bypass Piston Ring 4 Main Piston 15 Check Valve 27 Bypass Valve 5 Iiston Ring 17 Graduating-Valve Spring 2!) Bypass Valve Spring 6 Slide-Valve Spring IS Cylinder Cap 30 Bypass Valve Dap 7 Graduating Valve 19 Graduating Spring Nut 31 Bypass Piston Cap 8 Emergency Piston 2(1 Graduating Sleeve 32 Strainer a Emergency Valve Seat 21 Graduating Spring 33 Safety Valve LU Emergency Valve 22 Cylinder-Cap Gasket 34 End Cap 12 Check-Valve Spring of trains and in the face of widely varying conditions ofmaintenance, manipulation and climate. The longer thetrains, the greater will be the shocks if the valves do notsensitively respond to varying brake-pipe reductions inorder to insure the most rapid propagation of serial quickaction. Freight cars in general
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
