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OCR
1.-:-L
. GENERAL SPECIFICATION.
THE following general specification of an ordinary freight or passenger loco-
motive is given to show principal features of construction.
BOILER.
Of the best Pennsylvania cold-blast charcoal iron, three-eighths inch thick, or
of best homogeneous cast-steel, Eve-sixteenths inch thick; all horizontal seams
and junction of waist and fire-box double-riveted. Boiler well and thoroughly
stayed in all its parts, provided with cleaning holes, etc. Extra welt-pieces
riveted to inside of side-sheets, providing double thickness of metal for studs
of expansion braces. Iron sheets three-eighths inch thick riveted with three-
fourths inch rivets, placed two inches from centre to centre. Steel sheets five-
sixteenths inch thick riveted with five-eighths inch rivets, placed one and seven-
eighths inches from centre to centre.
VVAIST made straight, with two domes, steam being taken from the forward
dome; or with wagon-top and one dome. ‘
FLUES of iron, lap-welded, with copper ferrules on lire-box ends; or of
seamless drawn copper or brass.
FIRE-Box of best homogeneous cast-steel ; sidc- and back-sheets five-sixteenths
inch thick; crown-sheet three-eighths inch thick; flue-sheet one-halfinch thick.
Water space three inches sides and back, four inches front. Stay bolts seven-
eighths inch‘ diameter, screwed and riveted to sheets,and not over four and one-
half inches from centre to centre. Crown bars made of two pieces of wrought-
iron four and one-half inches by live-eighths inch, set one and one-half inches
above crown, bearing on side-sheets, placed not over four and one-half inches
from centre to centre, and secured by bolts fitted to taper hole in crown-sheet,
With head on under side of bolt,and nut on top bearing on crown bars. Crown
stayed by braces to dome and outside shell of boiler. Fire-door opening formed
by Hanging and riveting together the inner and outer sheets. Blow-off cock
in back or side of furnace operated from the footboard.
GRATES of cast-iron, plain or rocking, for wood and soft coal; and of water
tubes, for hard coal. .
ASH-PAN, with double dampers, operated from the footboard, for wood and soft
coal; and’ with hopper with slide in bottom, for hard C03”-
SMOKE-STACK of approved pattern suitable for the fuel. g : 13)., 0
, 3: 3., i3"“:.‘ I: 1.
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