Locomotive appliances . LOCOMOTIVE APPLIANCES. 377 automatic air brake on the drivers, and stop thetrain. By the use of this device engines can bereversed suddenly while running at a high rate ofspeed, without strain or damage to any portions ofthe machinery or boiler. RICHARDSON COMBINED PRESSURE AND VACUUMRELIEF VALVE. This valve (Fig. 7) is designed to be placed in thesteam chest to automatically supply clean air to thecylinders through the air-valve A when engine is mm ils=sasr. Fio. Combined Pressure and Vacuum Relief Naive. running shut off, and thus furnishes a free supply
Locomotive appliances . LOCOMOTIVE APPLIANCES. 377 automatic air brake on the drivers, and stop thetrain. By the use of this device engines can bereversed suddenly while running at a high rate ofspeed, without strain or damage to any portions ofthe machinery or boiler. RICHARDSON COMBINED PRESSURE AND VACUUMRELIEF VALVE. This valve (Fig. 7) is designed to be placed in thesteam chest to automatically supply clean air to thecylinders through the air-valve A when engine is mm ils=sasr. Fio. Combined Pressure and Vacuum Relief Naive. running shut off, and thus furnishes a free supply ofair from the outside instead of its being sucked in 378 LOCOMOTIVE APPLIANCES. from the smoke-box laden with hot gases and cinderswhich lap all oil from the valves and seats. The pressure relief valve B performs a very valua-ble function in preventing the dangerous accumula-tion of pressure in the steam chest and dry-pipe andoftentimes the breaking of same when the engine issuddenly reversed. The valve is set to open at apressure slightly above the maximum boiler pressure,and will allow any excess of pressure to escape to theatmosphere, yet will maintain in the cylinders auniform pressure of air within the limits of safetywhen running forward after reversing, and thussupply resistance to the pistons and overcome themomentum of the train, and perform the functions ofan automatic air brake in assisting to stop the using this valve an engine may be suddenlyreversed w
Size: 1744px × 1433px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
