All About Engines
Forfatter: Edward Cressy
År: 1918
Forlag: Cassell and Company, LTD
Sted: London, New York, Toronto and Melbourne
Sider: 352
UDK: 621 1
With a coloured Frontispiece, and 182 halftone Illustrations and Diagrams.
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The Modern Reciprocating Engine 127
rock on the pin which is fixed to the side of the
cylinder. This rocking motion is communicated to
the valves by means of the other levers. They
are attached in such a way that during opening and
closing the movement of the valves is very rapid, while
at other times they turn very slowly.
Fig. 78.—Transverse and longitudinal section through cylinder
fitted with drop valves
This valve-gear was invented by C. H. Corliss, an
American, about sixty years ago. Corliss valves are
less frequently adopted nowadays than drop valves,
mainly because they are more difficult to adjust for
wear.
Now, drop valves are ° balanced,” or “ equili-
brium ” valves, and, as was explained in Chapter IV.,
they are easy to work and easily reground or re-
placed. They are placed in precisely the same posi-