Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules (1908)
National correspondence school of railroading, Chicago. [from old catalog] · [Chicago] · leaf 195
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… … 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…
Locomotives
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