Union Pacific Locomotive #119 and Central Pacific Locomotive #60 ...

1T6 GLOSSARY.
. end over the induction ports, when in tiro middle o£ its
travel.
Ijead,—Distance to which the induction port ia opened,
when the piston commences its stroke.
Link-Motion.—An arrangement for working the valves,
described in the body of the book. ...'.;
Manometer.—An,instrument for determining accurately
the pressure on a given surface—as a square inch—within .
the boiler.
Man JIole.—A hole to admit a man within the boiler.
Mud Hole.—A small opening at bottom of water space
around nrc-box,'to clear out depositcs of dirt, and other
matter introduced with the water.
;?.—Any substance used to make a joint steam at
water tight. . .
Pet Cock.—-A small cock between the chock valve and
pump, to see if the latter is working.
I'intal,—rAn upright pin. .'There, is a pintal secured
beneath the forward end of the engine,- to connect it with
the truck frame, and to allow of the turning of the track,
independent of the engine.
Pinion.—'See Cylinder,
Piston i?oc?.^-Rod secured at one end within the bodyof
the piston, and at the other to the cross head. This rod
jasscs through the cylinder cover, and is made steam tight
by packing secured in a necking, or recess, outside of
cover, and called a stuffing-bos.
Plug, Fusible.—A lea.J piug tapped in, top sheet of
furnace, to melt and £ho ivamiiig whs" the water fails
lulow it.
GLOSSARY, 177
Plunger.—The solid piston of a pump, and pressing only
by one end against the water.
Ports.— Openings, or passages.
Priming.—The passage of water, along witli the steam,
into the cylinders, when the engine is working.
Mocker Shaft.--A shaft rocking in its bearings.
Heversiiig Lever.—K lever in reach of the enginemari,
acting upon the valve motion, and to change tlie direction
of the progross of the engine. •
Safely Valve.^A valve on the boiler, to discharge tha
eurplus steam generated, above what is required for the
engine, and which by accumulating would, endanger the
safety of the machine.
Slide.—See Guide. •••'.'••. •
' Smoke-box.—A chamber at forward end of boiler, where
the smoke and sparks from the tubes are received and discharged
through the- sparker.
Sparker, or Chimney.—A pipe to discharge tlio smoke
and waste steam, and surrounded by a casing to retain tha
sparks. . • •
Springs.—-These are required over each wheel to reduce
shocks and jolts...
Steam C7iest.~-I5ox on top, or side of cylinder,- and containing
the valve to admit steam on the piston.
Steam Pipe.—Pipe entering the : dome, and communicating
with the steam chests through two branch steam
pipes in the smoke-box. , '
Stuffing-box.—Sue Piston Rod.—Used in all situations
where a rod or spindle, having any end motion, requires
to be made steam or water tight around same. .-
Sub-fi-eamhj.—A receptacle for sparks. Slightly dif'
t .-••
I
I 1!
ft
it
•I!