Richmond dispatch. [volume] (Richmond, Va.) 1884-1903, 1894-03-14
a MISUNDERSTANDING TEST.
The Richmond Two-Cylinder Compound
Freight Locomotive.

Tho Richmond Two-Cylinder Compound
Freight Locomotive.
Tho Railroad Gazette Of March sth'
says:
"In the Gazette for February 2Sd last APP
reared a news item to the erect u'a'
through the courtesy of Mr.. William Car
stang OF the Cleveland. Cincinnati, chi
cago and St. Louis, and Mr.. W. f. Rem
shaw. of the Illinois Central. the Rich
mond Locomotive and Machine WORKS
was exhibiting its new ten-wheel COM
pound freight locomotive to the western
railroad-men at Chicago. The locomotive
IS a two-cylnder compound, the COM
pounding features being similar to the To-
connective built in 1893 by the same COM
many for the Chesapeake and Ohio. TINS
latter locomotive was illustrated III the
Railroad Gazette April q. 1885. The IL
lustration given with this Is from photo
graph OF the freight locomotive under
construction, and shows the general APP
I.earance of the machine.
THE INTERPRETING VALVE.
1--WE are not permitted to illustrate the
intercepting or emergency valve at pres
ent. but from Mr.. Barness revision OF
Professor Woodss book on compound To-
comotives we quote: In the cylinder
saddle there is q small piston with dash
pot connected to the pistonrod. which
controls an intercepung valve placed
horizontally. The intercepting valve shuts
off the steam that Is admitted to the
high-pressure cylinder at starting from
entering the receiver. Surrounding the
small piston is an annular sleeve or piston
which serves az n reducing valve The
emergency valve consist of a plain, bevel
seated valve. attached to a piston, which
is connected on one side to a live steam
pipe leading to a valve in the cab This
piston is returned to its seat by a spring
on the piston rod. The device operates
as follows:
" Steam from the main steam pipe
acts upon the annular piston around the
intercepting valve stem. and forces the
intercepting valve TO its seat. thus clos
ing communication between high-pressure
cylinder and the receiver. At the same
time the sleeve or annular piston opens
a small port, which admits steam to the
low-pressure cylinder directly from the
main steam-ppe through a 3-inch
pipe. This sleeve then acts as reduc-
ing valve. - When the intercepting
valve is closed. the exhaust from the
high-pressure cylinder accumuates in the
receiver and pushes the intercepting valve
back TO an open position, and the engine
works compound.
HIGH PRESSURE.
"'When 1t is desired to work with a
separate exhaust for the hgh-pressure
cylinder, the engineer opens valve In
the cab and admits steam back of the
piston, which is connected with the emer-
gency valve The pressure on the piston
forces the emergency valve open. This
opens communication from the receiver
20 the atmosphere. and gives a separate
exhaust for the high-pressure cylinder.
The system can be used automatic or
automatic In this respect II Is one
OF the few compunds having a sedarate
exhaust for the high-pressure cylinder.
The advantage Of this Is that II renders
st possible In case of accident to one
side TO run with the other side the same
as with an ordinary simple engine
Excepting the compromising features.
the locomotive was built from drawings
furnished by the railroad company.
COMPARATIVE TABLE.
From the performance sheet Of one OF
the roads on which the locomotive has
run we have obtained the following COM
parison with sixteen simple engines of the
same Cten-wheeD type, with cylinders
nineteen by twenty-four inch. The boiler
pressure in each was the same. $50 pounds
per square inch.