Locomotive operation; a technical and practical analysis (1904)
Henderson, G. R. (George R.), b. 1861 · Chicago, Railway Age · leaf 111
OC()MOTI\E OPERATION. for the steam to and from tlic cylinder tlian the or(hnary flatvalve. The Allen valve was desi.q;ned to give a larger steam ad-mission, and for a part of tire valve travel the area of steamopening to the cylinder is actually doubled. This valve isshown in section in Fig. 29.… … Fig. 32.- valve uncovers the port f, the passage a at the other end ofthe valve will be opened by the edge e of the seat, and steamwill enter the cylinder through both openings. \\hen the edgeb reaches the bridge g, the port a will be closed by the sameamount that the port f is opened by the edge…
Locomotives
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