IMPROVEMENTS IN BOGIES FOR TRANSPORTING FURNACE SLAG
Year: 1883

page_text: LETTERS PATENT to John Paterson of Workington in the County of
Cumberland, Furnace Manager for an Invention of "IMPROVEMENTS IN
BOGIES FOR TRANSPORTING FURNACE SLAG"
PROVISIONAL SPECIFICATION left by the said John Paterson at the Office
of the Commissioners of Patents on the 19th March 1883.
JOHN PATERSON, of Workington, in the County of Cumberland, Furnace Manager,
"IMPROVEMENTS IN BOGIES FOR TRANSPORTING FURNACE SLAG,"
This Invention relates to improvements in the construction of bogies used for
transporting or conveying hot blocks of furnace slag from the furnaces where the
molten slag is emptied on to the bogie to the tipping bank where the slag blocks
are tipped or thrown off.
In constructing the improved slag bogie, the bottom or flat plate upon which
the block of slag rests, is formed of cast-iron and in three parts, the divisions being
longitudinal; and on the lower side of each section is cast or formed two, three,
or more long eyes through each set of which strong cotter bolts are passed
transversely.
The side frames carrying the "bottom," are formed by two box-like castings,
fitted longitudinally below the "bottom," one on each side, and close to the eyes
formed on the under side of the bottom, so that the transverse binding bolts pass
through eyes formed in the frames, and bind the whole together. On these side
frames are cast or formed axle box bearings or blocks which carry bushes to bear
on the wheel axles, and these axle boxes or blocks are formed with recesses for
carrying the grease to lubricate the axle bearings, perforations being also formed
to allow the lubricant to find its way down to the bearings. The bearings being
cool, the grease only lubricates the bearings when the bogie is in motion, and there
is consequently a considerable saving effected in lubricating material, and in the
time and trouble required for filling the grease boxes. The wheels and axle are of
the usual construction.
The box-like form of the bogie frames allows of a free circulation of air between
the upper side on which the bottom bears, and the axle bearings; so that the heat

page_text: of the slag resting on the bottom is not communicated to the usual extent to the
bearings. The bottom being cast in separate sections which may freely expand
and contract, is not so liable to be broken as when made in one piece, or as when
the frame and part of bottom are cast in one piece. The drag bar or hook by
which the bogie is drawn, is fitted on the strong cotter bolts which bind the
bottom and side frames at each end, and the strain of dragging the bogie, or a
number of bogies, is therefore distributed over the entire bogie frame, instead of
being as usual communicated to a small hot and therefore weakened part of the
bottom only.
The improved slag bogie being constructed of simple castings, has the advantage
of being cheap and durable, and of possessing great strength, while owing to there
being an entire absence of screw bolts and rivets, the cost of maintenance is
extremely light.
By making the bogie bottom in sections a greater width on the face of the
tram buffers may be admitted thereby preventing buffer-locking in going round
curves.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent:filed
by the said John Paterson in the Great Seal Patent Office on the 23rd August
1883.
JOHN PATERSON, of Workington, in the county of Cumberland, Furnace
Manager "IMPROVEMENTS IN BOGIES FOR TRANSPORTING FURNACE SLAG
"
My said Invention relates to improvements in the construction of bogies used for
transporting or conveying hot blocks of furnace slag from the furnaces, where the
molten slag is emptied on to the bogie, to the tipping bank where the slag blocks
are tipped or thrown off.
This Invention is illustrated by the accompanying Drawings, in which Figure 1
is a sectional elevation of the improved slag bogie, and Figure 2 a plan of the
same, with a portion of the bottom broken away to show the frames and axle
beneath. Figure 3 is an end view, and Figure 4. is a transverse vertical section:
of the bogie. Figure 5 is a longitudinal section of the central part of the bottom
plate of the bogie.
In constructing the improved slag bogie, the "bottom" or flat plate A, upon
which the block of slag rests (while being conveyed) is formed of cast-iron and in
three parts, the divisions being longitudinal; and on the lower side of each section.
is cast or formed two, three, or more long eyes a, through each set of which strong
cotter bolts b are passed transversely.
The side frames carrying the "bottom" A are formed by two box-like castings
B, B, fitted longitudinally below the "bottom," one on each side, and close to the
outer ends of the eyes a formed on the underside of the bottom A, so that the
transverse binding bolts b passing through the eyes a pass also through the eyes bl
formed in the frames B, and bind the whole together. On these side frames B are
cast or formed axle-box bearings or blocks C, which carry bushes c to bear on the
wheel axles D, and these axle boxes or blocks C are formed with recesses c¹ for
carrying the grease to lubricate the axle bearings c, perforations being also formed
through the bearing blocks and bushes to allow the lubricant to find its way down
to the bearings. The bearings being kept cool, the grease only lubricates the
bearings when the bogie is in motion, and there is consequently a considerable
saving effected in lubricating material, and in the time and trouble required for
filling the grease boxes. The wheels D' and axle D are of the usual construction.
The frames B are prevented from rising off the axles D by caps or.covers d secured
by bolts and cotters to the underside of the bearing blocks C, and which can be
readily removed.
The box-like form of the bogie frames B allows of a free circulation of air in the
spaces B' between the upper side B on which the "bottom" A bears, and the
lower side B on which are formed the axle bearings; so that the heat of the slag
blocks resting on the "bottom" A is not communicated to the usual extent to the
bearings. The "bottom" A being cast in separate sections which may freely
expand and contract, is not so liable to be broken as when made in one piece, or as
when the bogie frame and part of the bottom are cast in one piece. The drag bar
or hook E by which the bogie is drawn, is fitted on the strong cotter bolts b,
which bind the bottom A and the side frames B at each end, and the strain of
dragging the bogie, or a number of bogies, when attached to a locomotive, is
therefore distributed over the entire bogie frame A. B, instead of being as usual
communicated only to a small hot and therefore weakened part of the "bottom"
to which the hook is attached.

page_text: The improved slag bogie being constructed of simple castings, has the advantage
of being cheap and durable, and of possessing great strength, while owing to their
being an entire absence of screw bolts and rivets, the cost of maintenance is
extremely light.
By making the bogie bottom in sections, a greater width on the face of the
tram buffers may be admitted, thereby preventing buffer-locking in going round
curves..
Having particularly described my said Invention and the manner in which the
same is to be performed, I declare that what I claim is,―
First. The construction and combination of parts of slag bogies in the improved
manner herein.described and illustrated.
Second. A slag bogie constructed with a bottom plate (A) formed in longitudinal
sections of cast-iron, bound together and secured to open box-like supporting
frames (B) on which are formed or attached the axle bearing blocks (C), the whole
being carried on ordinary wheels and axles, substantially as herein described and
illustrated.
Third. In a slag bogie, the bottom plate: A formed of cast-iron in longitudinal
sections and provided with eyes à, or equivalent devices, by which the sections
may be bound together and secured to the supporting frames of the bogie,
substantially as herein described and illustrated.
Fourth. In a slag bogie, the box-like supporting frames B formed as 'herein;
described and illustrated, with axle-bearing blocks C, and with open air spaces B
between the upper and lower sides of the box frames, for the purpose set forth.
In Witness Whereof, I the said John, Paterson, have hereunto set my hand and
seal this Seventeenth day of August, in the year of our Lord One thousand eight
hundred and eighty three..."