. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . PLATE 63. 184 VALVE MOTION. sition of the eccentrics on the shaft and the type ofrocker arm used. A direct motion valve gear (Plate 63) is one whichtransmits the motion of the eccentric to the valve directby means of the transmission bar and the rocker shaft,upon which both rocker arms hang suspended and movein the same PLATE 64. An indirect motion valve gear (Plate 64) is one inwhich the power is transmitted from the eccentric to thelower rocker ar
. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . PLATE 63. 184 VALVE MOTION. sition of the eccentrics on the shaft and the type ofrocker arm used. A direct motion valve gear (Plate 63) is one whichtransmits the motion of the eccentric to the valve directby means of the transmission bar and the rocker shaft,upon which both rocker arms hang suspended and movein the same PLATE 64. An indirect motion valve gear (Plate 64) is one inwhich the power is transmitted from the eccentric to thelower rocker arm, which by its motion forward forces theupper rocker arm backward so that the travel of the ec-centric is opposite to that of the valve. STEAM EXPANSION. Working steam expansively is the process bywhich steam is admitted to the cylinder and cut off(Plate 62) before the piston has completed its fullstroke, thereby allowing the expansive force of thesteam to exert its energy upon the piston from the timethe cut-off takes place up to a point where the steam isreleased. The distance the valve travels during the ex-pansion of the steam equals the total of the outside andinside laps of the valve. EXHAUST CLEARANCE. The exhaust clearance is the space between theinside edge of the exhaust arch and the outside edge of PREVENTING BREAKDOWNS. 185 the exhaust bridges when the valve stands centrally onits seat, indicated by the space between lines O and P(Plate 51). C
Size: 2358px × 1059px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthornationalcorrespondenc, bookcentury1900, bookdecade1900
