An Undulating Hearth Furnace.
Year: 1889

page_text: Date of Application, 3rd Sept., 1889-Accepted, 5th Oct., 1889
COMPLETE SPECIFICATION.
An Undulating Hearth Furnace.
I. ANTHONY BARKER, of 252, Forty fifth Street, Pittsburgh, in the County of
Allegheny, State of Pennsylvania, United States of America, Metallurgist, do hereby
declare the nature of this invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
The object of my invention is to provide for the agitation of molten iron so that
every separate particle of iron will be brought into contact with the reagent such as
the metallic oxide found in cinder, slag or scale employed for its purification; and to
this end the invention consists essentially of a centrally supporting hearth or basin
and a means for undulating the basin, as hereinafter specified.
Reference is to be had to the accompanying drawings forming part of this specifica-
tion in which Figure 1 is a central longitudinal sectional view of a reverberatory
furnace, representing the same as it appears when provided with my improved
undulating hearth or basin.
Figure 2 is a sectional plan view taken on line - of Figure 1.
Figure 3 is a cross sectional view taken on line y-y of Figure 2, the basin or
hearth being represented as it appears when in a horizontal position.
Figure 4 is a similar view, the basin or hearth being, however, represented in its
position of greatest depression.
Figure 5 is a plan view of the roller carrying disk.
Figure 6 is an inverted plan view of the hearth or basin.
Figure 7 is an enlarged detail view in central cross section.
Figure 8 is an enlarged plan view of a portion of the hearth or basin.
Figure 9 is an enlarged detail view of the construction illustrated in Figure 7, the
basin or hearth, however, being represented in its inclined position; and
Figure 10 is a cross sectional view representing a modified construction.
Similar letters of reference indicate corresponding parts in all the figures.
In the drawings above referred to, 10 represents a hearth or basin that is made
from a cast iron base 11 and cast iron side walls 12 that are bolted to the base, the
whole being lined with the refractory material 13. A boss 14 formed with a concave
recess extends downward from the underside of the center of the base 11, and about
this boss there is formed a concentric cam-faced flange 15, the face of said flange
being in a plane that is at a slight angle to that of the base.
The hearth is supported by a vertical post or standard 16 which passes through a
bed plate 17 to a step 18, the upper end of the shaft or post being convex to fit
within the concave recess of the boss 14. A disc 19 is loosely fitted upon the
post 16 and rests upon the plate 17, and this disc is formed with bevel teeth 20
about the edge of its under side, with which gears a pinion 21 that is carried by
a horizontal shaft 22 which may be driven in any manner desired, as, for instance,
by means of a belt passing over a pulley 23 that is carried by the shaft. The
disc 19 carries four wheels or rollers 24, 25, 26 and 27, of which the rollers 24
and 26 are of the same size and are located at points diametrically opposite the
axis of the disk. The roller 25 is larger than the rollers 24 and 26 while the roller
27 is smaller than said rollers 24 and 26. The rollers 25 and 27 are arranged at
right angles to the rollers 24 and 26.
About the hearth 10 there are secured a number of flanges 28 that are formed
with hook-like projections 29 which are engaged by correspondingly hook-shaped
projections 30 that are formed upon plates 31, said plates being lined with firebrick,
while a loose fold 32 of asbestos cloth is attached as represented. About the upper
portion of the said walls or flange 12 there is fitted a collar or rim 34 which may be
removed when exceedingly worn.

page_text: .
To the working door 35 of the hearth there is connected a working fore-plate 36
which rests against the flange 12, as shown in the drawings, the fore-plate moving
from the position in which it is shown in Figure 3, to the position shown in Figure 4
as the hearth or basin is tilted; or instead of such a fore-plate as the one shown a
fore-plate 36 (see Figure 10) might be employed, this fore-plate being pivotally
connected to the furnace wall just inside of the working door in a manner so that
it will rise and fall az the hearth or basin is tilted.
In Figure 8 I have shown three straight plates 37, of which the center plate is a
breast plate while the others are jam plates.
Such being the general construction of my improved undulating furnace, the
operation is as follows:
A rotary motion being imparted to the shaft 22, the disc 19 will be revolved and
the rollers carried by said disc will travel around the cam-faced flange 15, the wheels
or rollers 24, 25, 26 and 27 being so proportioned that when the roller or wheel 25 is
beneath that portion of the flange 15 which extends to the least degree from the
plate 11, the basin or hearth will be in a horizontal position, but when the wheel
or roller 25 is beneath the opposite side of the hearth-that is, beneath that
portion of the flange which has the greatest projection, the hearth or basin will be
tilted, as illustrated. By following the motion necessarily imparted to the basin it
will be seen that an undulation will be established in the molten liquid contained in
the basin or hearth, such undulation, however, being checked when the basin is
brought to a horizontal position, the arrangement being such that an exceedingly
thorough agitation of the molten metal is obtained, so that all particles thereof will
he subjected to the action of the reagent.
In order to prevent the rotation of the hearth or basin, it is held by clutches 40)
which work in slots formed in the fire bridge and flue bridge, as shown in Figure 1.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is
1. In an undulating furnace, the combination, with a basin or hearth, of a central
post or standard upon which the hearth is free to undulate, a rotary disc, wheels of
unequal diameter carried thereby and arranged to bear against the under side of the
hearth, substantially as described.
2. In an undulating furnace, the combination, with a hearth formed with a central
boss or projection having a concave central recess, of a cam-faced flange surrounding
said boss, a post or standard entering the recess of the central boss, a rotary disc,
wheels carried by said disc and arranged to bear against the cam-faced flange,
substantially as described.
3. The combination, with a hearth supported by a central standard, and a means
for tilting the hearth, of swinging aprons or flanges mounted to bear against the outer
edge of the hearth flange, substantially as described.
1. The combination, with a hearth, of a central supporting post or standard, a
means for undulating the hearth, swinging aprons or flanges bearing against the
outer face of the hearth flange, and an asbestos fold arranged about the hearth, substan-
tially as described.
5. The combination, with an undulating hearth or basin, of a swinging fore-plate
arranged in connection therewith, substantially as described.
6. The combination, with a non-rotary tilting hearth or basin, of a swinging fore-
plate resting against one edge thereof, substantially as described."
Date this 3rd day of September 1883.
By A. M. & Wm. Clark,
A. BARKER.
53, Chancery Lane, London, Patent Agents.
COOT
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