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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266 All About Engines
tube near the top, leading from the interior of the
boiler, is the main steam pipe.
Fig. 151 shows in section the modern long smoke-
box, first introduced in America. It has the advan-
Fig. 151.—Modern extended smokebox of locomotive
tage that
the draught
through the
tubes is
stronger and
steadier. An
arrangement
is indicated
whereby the
blast can be
varied. In
continuation
of the main
steam pipe
just after it
has emerged
from the
boiler is
placed the
superheater. This consists of a number of tubes bent
in the shape of long U’s and lying in wide flues in the
upper portion of the boiler.1 Through these the steam
passes on its way to the cylinders, yielding more power
than if steam at ordinary boiler temperature was
used. Superheating was tried on locomotives many
years ago, but experiments were not very successful.
The superheater flues are not shown in Fig. 151.