Locomotive catechism; an up-to-date, practical and complete work on the locomotive--treating on the design, construction, repair and running of all kinds of locomotives .. (1908)
Grimshaw, Robert, 1850- [from old catalog] · New York, The N. W. Henley publishing company · leaf 246
taken in the manufactureof the valve itself after it is designed? A. That the coring is good, in order that the passagethrough it may be full size and have smooth walls. Q. What is the disadvantage of the Allen extra port? A. On long-travel valves under high pressures, the greaterlength… … Allen or Trick Valve. Q. What is the usual cause of the excessive compressionoften charged to the Allen valve?A. Too much lead. 240 LOCOMOTIVE CATECHISM. Q. For what is the extra steam port leading over the topof the Allen valve? A. To give a double port opening from the steam chestto the cylinder…
Locomotives
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
