Improvements in Rocking and Dumping Furnace Grates.
Year: 1897

page_text: Improvements in Rocking and Dumping Furnace Grates.
JAMES NEIL 30 Langland Street Kilmarnock N.B. Machinery Agent do hereby
declare the nature of this invention to be as follows:-
My invention consists of an improved rocking & dumping furnace grate composed
of a set of compound bars. Each bar is a combination of longitudinal & transverse
vertical webs having journal ends formed on them which rest in bearings formed by
joining near together a pair of fluted or corrugated vertical webs. The transverse
webs may be at right angles to the longitudinal webs or more cr less inclined to them.
Each bar is formed with a downward projecting lug at one end, having pins formed
on them which engage in holes and notches in the connecting link bar which is
concaved on the upper surface between the pin holes.
Heads or projections are formed on the pins, which retain the link bar when placed
in position, the pins which engage in the notches automatically locking the
connection.
For long furnaces the grate is made in two sections, coupled together about the
middle. For this purpose a middle transverse bearing is used composed of two
vertical webs joined near together by walls at regular intervals. The sections between
these walls are convex on the upper surface and the front ones are concave on the
bottom edge and perforated if desired.
In each section of this bearing there rests a short spindle with rectangular
projecting ends, over which the connecting ends of the compound bars are dropped.
This spindle is provided with a downward projecting foot at each end, upward and
side projecting snugs, and a web or collar on the middle. A slot with vertical or
inclining walls is formed on the connecting ends of the bars to settle down on these
spindle ends, the projecting snugs engaging in recesses formed for them connect the
bars together end to end. This slot is also provided with horizontal projections on
the side walls, and a bar across the top between the web ends & projecting.
The under surface of each end of this middle bearing and the upper surface of the
bolster on which it rests, are grooved or corrugated, the bolster being also provided,
with a downward projecting pin on each end which engages in holes formed in the
supports fixed to the furnace plates.
The compound bars are made with two, three, or four longitudinal webs extending
or not below the transverse webs.
. When two are used they are placed near together in the middle, fluted on each
side vertically, and along the surface longitudinally. They are intersected alternately.
and at intervals by the transverse webs, the intersecting webs extending across the
intervening air space between the longitudinal webs joining them together. The
transverse webs are joined together by teeth inserted between them at or near their
lateral edges and project or not past or below the web ends, the projecting part being
notched inwards about the middle. These teeth are fluted vertically on the inside
and the transverse webs on both sides and across their upper surface.
When three longitudinal webs are
each side, fluted as described above.
used, one is placed in the middle and one at
:

page_text: When four longitudinal webs are used, two are placed near together in the middle,
intersected at intervals by the transverse webs, and one at or near each lateral edge
of the transverse webs.
These longitudinal webs are corrugated, the tops of the corrugations of the side
webs between the transverse webs pointing outward, the flutings inside. The bottom
edges of the side webs are fluted across forming a serrated pattern. The transverse
webs extend above the longitudinal webs, or the latter may be only fluted across
between the webs.
A downward projecting tooth is formed on the bottom edge of the transverse webs,
at or near the end, serving also as a fillet when the longitudinal web projects below
the transverse.
The upper surface of the transverse webs is convex except the extreme web ends
which project straight out with a flat surface.
When used for dumping bars the bottom edge of the transverse webs has a convex
form, or the cross section made to resemble the longitudinal section of a barrel, the
bottom edge may be serrated.
When used for rocking bars the bottom edge of the transverse webs curves inward
and downward in a varying curve line, having its greatest radius extending from the
web end inwards and its smallest radius where it rounds the shoulder, thence
downward as desired.
When made for corrugated or suspension furnaces the side of each bar which is to
be adjacent to the furnace plates is formed with the transverse webs terminating in a
curve line corresponding with the curve line of the furnace plates. The long webs
extend below the shorter ones and the upper surface is concave towards the
extremities. The webs may be joined together by teeth as described or may be
intersected at or near their ends by a longitudinal vertical web curved so as to
resemble the curve line of the furnace plates.
Dated this Eighteenth day of January 1897.
07
Improvements in Rocking and Dumping Furnace Grates.
I, JAMES NEIL, 30, Langland Street, Kilmarnock, in the County of Ayr, North
Britain, Engineering Agent, 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, that is to say :-
My Invention consists of an improved rocking and dumping furnace grat
composed of a set of compound bars. Each bar is a combination of longitudinal and
transverse vertical webs having journal ends formed on them which rest in bearings
formed by joining near together a pair of plain or fluted or corrugated vertical webs.
The transverse webs may be at right angles to the longitudinal webs or more or less
inclined to them.
Each bar is formed with a downward projecting lug or short lever at one end fixed
at an angle having pins formned on them which engage in holes and notches in the
connecting link bar which is concaved on the upper surface between the pin holes.
Heads or projections formed on these pins retain the link bar when placed in position,
the pins which engage in the notches automatically locking the connection; or a
double lug may be used, the sliding bar working between them.
For long furnaces the grate is made in two sections coupled together about the
middle. For this purpose a middle transverse bearing is used composed of two
vertical webs joined near together by walls at regular intervals. The sections between

page_text: these walls are convex on the upper surface and the front ones are concave on the
bottom edge and perforated if desired. This bearing may be divided horizontally
the top half being the bearer proper and the bottom half a carrier supporting the
bearer. The bearer may be subdivided into sections. In each section of this bearing
there rests a short spindle with rectangular projecting ends over which the connecting
ends of the compound bars are dropped. This spindle is provided with a downward
projecting foot at each end, upward and side projecting snugs and a web or collar on
the middle. A slot with vertical or inclining walls is formed on the connecting ends
of the bars to settle down on these spindle ends, the projecting snugs engaging in
recesses formed for them and thus connect the bars together, end to end. This slot
is also provided with horizontal projections on the side walls and a bar across the top
between the web ends. The under surface of each end of this bearing and the
upper surface of the bolster on which it rests are grooved or corrugated the bolster
being also provided with a downward projecting pin on each end which engages in
holes formed in the supports or brackets fixed to the furnace plates.
The compound bars are made with two, three, or four longitudinal webs, extending
or not below the transverse webs, when two longitudinal webs are used they are
placed near together in the middle of the bar, and the webs are fluted on each side
vertically and along the surface longitudinally. The longitudinal webs are intersected
alternately and at intervals by the transverse webs, the intersecting webs, extending
across the intervening air space between the longitudinal webs joining them together.
The transverse webs are joined together by teeth inserted between them at or near
their lateral edges and project or not past or below the web ends the projecting part
being notched inwards about the middle. These teeth are fluted vertically on the
inside and the transverse webs on both sides and across their upper surface, also with
channels grooved out on their surface.
When three longitudinal webs are used one is placed in the middle of the bar and
it may be provided or not with oblong air spaces up the middle; also one bar is
placed at each side, these two latter bars being fluted as herein before described.
When four longitudinal webs are used, two are placed near together in the middle
of the bar and they are intersected at intervals by the transverse webs; and one
longitudinal web is placed at or near each lateral edge of the transverse webs. These
longitudinal webs are corrugated, the tops of the corrugations of the side webs
between the transverse webs pointing outward, and the flutings inwards. The bottom
edge of the side webs are fluted across forming a serrated pattern which act as an
inner or auxilliary row of teeth, the flutings also permitting of more freedom to rock
each space being opposite a tooth. The outside row is the main cutting teeth. The
transverse webs extend above the longitudinal webs or the latter may be only fluted
across between the webs. A downward projecting tooth is formed on the bottom
edge of the transverse webs at or near the end serving also as a fillet when the
ongitudinal webs project below the transverse webs.
The upper surface of the transverse webs is convex, except the extreme web ends
which project straight out with a flat surface. When used for dumping bars the
bottom edge of the transverse web has a convex formn so as, (in a cross section of the
par) to resemble the longitudinal section of a barrel. The bottom edge may be
errated.
When used for rocking bars the bottom edge of the transverse webs curves inward
nd downward in a varying curve line having its greatest radius extending from the
eb inwards, and its smallest radius where it rounds the shoulder thence downward
s desired.
When made for corrugated or suspension furnaces the side of each bar which is to
e adjacent to the furnace plates is formed with the transverse webs terminating in a
urve line corresponding with the curve line of the furnace plates. The long webs
xtend below the short ones and the upper surface is concaved towards the
xtremities. The webs may be joined together by teeth as described or may be
tersected at or near their ends by a longitudinal vertical web curved so as to
esemble the curve line of the furnace plates.

page_text: And in order that my said Invention and the manner of performing the same may
be properly understood I hereunto append a sheet of explanatory drawings to be
hereinafter referred to and showing by way of example a furnace grate as made with
my improvements and suitable for a furnace of short length and a modification of
certain parts to adapt the grate to long furnaces.
Figure, 1, on the accompanying sheet of drawings is a plan, Figure, 2, a transverse
sectional elevation; and Figure, 3, is a side elevation showing one modification of my
improved grate.
Figures, 4, 5, and 6, are similar views of parts of a second modification.
Figure, 7, is a plan, Figure, 8, an end elevation, and Figure, 9, a side elevation, of
the carrying spindle for connecting the ends of the compound bars used in long furnaces.
In these drawings the same reference letters and numerals are used to mark the
same or like parts wherever they are repeated.
As shown in the drawings the improved rocking and dumping furnace grate is
composed of a number of bars, A, each of which is made with two longitudinal
webs, A 1, placed near together along the middle of the bar. The longitudinal
webs, A 1, are fluted or grooved on their inner sides and connected together at
intervals by cross webs, A 2, thus forming a central longitudinal series of passages, A 3,
through which air can pass up to the fire. A number of transverse webs, B, extend
out from the longitudinal webs, A 1, these transverse webs, B, being connected
together at their outer ends by longitudinal externally toothed webs, C, D, notches or
serrations, D 1, (Figure, 3) being also formed along the bottom edges of those webs.
The upper surfaces of the transverse webs; B, are convex and the bottom edge of
the transverse webs are also convex so that taking a transverse section of the bar, A,
it resembles the longitudinal section of a barrel. The bottom edge of the transverse
.webs, B, may be serrated as shown at, B 1, Figure, 2, to assist in breaking up clinker
and thus facilitate its passage to the ashpit. Each bar, A, is formed with a pair of
downwardly projecting lugs or short levers, E, fixed at an angle at one end. These
lugs, E, are connected by pins, E 1, to a link bar, F, which is made corcave on its
upper surface between the connections. The bars, A, have on their ends journals, A 4,
which rest in bearings formed for them in two bearers consisting each of a pair of
parallel webs, G, joined together by cross pieces, G 1, and placed one at the front
and the other at the back of the furnace grate (Figure 1). One of the journals, A 4,
is extended outwards and has its end, A 5, squared to receive a handle, (not shown)
by means of which the bars, A, can be rocked or dumped the motion being imparted
to all the bars through the connecting link bar, F, and lugs, E.
For long furnaces each of the bars, A, is made in two sections
about the middle of the grate as shown in Figures, 4, 5, and 6.
middle transverse bearer, G 2, is used. This bearer, G2, is similar to the end
bearers (G) except that the sections between the walls or cross pieces, G 1, are convex
on the upper suface. This bearer, G2, may, as shown in Figures, 5, and 6, be
divided horizontally, the top half, G 2, being the bearer proper, and the bottom
.half, G 3, being a carrier supporting the bearer. The bearer may be made in section's
.as shown by the dotted line, G 4, in Figure, 4. The under surface of each end of the
.bottom half, G 3, of the bearer and the upper surface of the bolster, G 5, on which
it rests are grooved or corrugated, the bolster being also provided with downwardly
projecting pins, & 6, on each end which engages in holes formed in the supports or
brackets (not shown) fixed to the furnace plates (not shown). In each section of this
bearer, G 2, there rests a short spindle, H, made with a web or collar, H 1, at its
middle which lies between the vertical webs or bars forming the bearer, G 2. Each
end of the spindle, H, is provided with a downwardly projecting foot, H 2, and
snugs, H3, H4, which project upwards and from each side of the foot.
A tapered
slot, J, is formed in the inner end of each bar, A, and this slot, J, when the bars are
placed in position fits on the projecting foot, H2, at each end of the short spindle, H,
the projecting snugs, H 3, H 4, at the same time engaging in recesses formed for
them in the slot, J, and thus connect the bars together end to end. The slot, J, is
slightly contracted near its bottom end. which thus forms horizontal projections, J 2,
coupled together at
For this purpose a

page_text: on the bar being rocked as herein before described, bear on the bottom of the
foot, H 2, and thus help to keep the bar in position.
In the modification of the carrying and connecting spindle, H, shown in
Figures, 7, 8, and 9, the upwardly projecting snug (H3) is dispensed with, the
corresponding recess at the upper part of the slot, J, in the end of the bar being also
not necessary in this case. The spindle, H, may, if desired be made in two parts as
shown by the dotted line, H 5 (Figures, 7, and 9).
Having now particularly described and
Invention and in what manner the same is to be performed, I declare that what
ascertained the nature of my said
I claim is:
1. In rocking and dumping furnace grates the combination in each grate bar of
two central longitudinal webs fluted or grooved on their inner sides and connected at
intervals by cross webs, two side longitudinal webs externally toothed, transverse
webs connecting the side longitudinal webs with the corresponding central
longitudinal web, the upper and lower surfaces of the longitudinal and transverse
webs being curved so that in transverse section the grate bar is approximately barrel
shaped substantially as and for the purposes hereinbefore described.
2. In rocking and dumping furnace grates the combination in each grate bar of a
central longitudinal web, two side longitudinal webs externally toothed, transverse
webs connecting the side longitudinal webs with the central longitudinal web, the
upper and lower surfaces of the longitudinal and transverse webs being curved so
that in transverse section the grate bar is approximately barrel shaped substantially
as and for the purposes herein before described.
3. In a rocking and dumping furnace grate providing a middle transverse bearer
consisting of parallel webs or bars in which is mounted short rocking spindles with
which spindles the inner ends of the grate bars are detachably connected, the said
spindles being provided at their middles with webs or collars which are adapted to
urn between the parallel bars of the bearer substantially as and for the purposes
herein before described and as shown in Figures, 3 to 9, of the accompanying
drawings.
4. In a rocking and dumping furnace grate of the kind to which the Invention
elates making the lateral longitudinal webs, C, D, with external teeth in combination
ith serrations or notches along the bottom edges substantially as and for the
urposes herein before described.
Dated this Sixteenth day of October 100s
EDMUND HUNT,
Applicant's Agent.