An Improved Furnace Grate Bar.
Year: 1889

page_text: Date of Application, 26th Nov., 1889
Complete Specification Left, 12th Apr., 1890-Accepted, 31st May, 1890
PROVISIONAL SPECIFICATION.
An Improved Furnace Grate Bar.
I FREDERICK WILLIAM BARKER, of 151 Strand Middlesex, Patent Agent, (a
communication to me from abroad by Robert Rose, of Calliope, County of Sioux
and State of Iowa, United States of America, Inventor and by G. T. Gearhart and
Charles R. Allen, of same place), do hereby declare the nature of this invention to be
as follows:-
By this my invention I provide a frame which may be that of any fire-box adapted
to support the grate. Journalled at opposite ends of this frame and in the side walls
thereof are rock shafts. These rock shafts are of a peculiar form having alternating
bearings or loops to which the opposite ends of the respective grate-bars are secured
and the rock-shafts are each provided with a depending arm for the attachment
of a connecting bar.
The grate bars which are also of a peculiar construction have zigzag sides so
formed that the projection of one bar will lie at a point directly opposite the cut out
portion of the opposite bar and partly within the same and when the bars are placed
in position in the grate such projections will alternate. These grate bars are also of
a tapering form-that is to say they taper from above downwardly the object of
which will be presently explained. Tho bars are furthermore provided with means
for securing them in the loops or bearings of the rock shafts preferably consisting of a
depending arm at opposite ends to enter the loops and be secured by a crosspin
although I do not wish to confine myself to this precise means.
It should be here remarked that while the projections on the side of one bar are
at points opposite the cut out portions of the adjacent and partly within the same
yet they do not come so close together as to prevent the vertical vibration of each
other in operation.
The bars and rock shafts should be so arranged within the furnace that the bars
may have a slight longitudinal play. One of the rock shafts is provided with a hand-
lever for the grasp of the operator which when reciprocated will impart a reciprocating
motion to the grate-bars at the same time giving them a vertical vibration. If desired
this lever may by a simple alteration of the mechanical detail-be made to operate from
the front of the grate-bars. It will thus be seen that by having the grate-bars
tapering and corrugated when they have been reciprocated they will have a grinding
action upon the cinders so that the latter will not choke between the bars but may be
ground to a certain extent and, together with the ashes, deposited in the ash box
beneath.
11.
Dated this 26th day of November 1889.
HORNE & SON,
Applicant's Agents.
COMPLETE SPECIFICATION.
An Improved Furnace Grate Bar.
1, FREDERICK WILLIAM BARKER, of 151 Strand, Middlesex, Patent Agent,
do hereby declare the nature of this invention (a communication to me from abroad
by Robert Rose, of Calliope, County of Sioux, and State of Iowa, United States of
America, Inventor, and by D. T. Gearhart and Charles R. Allen, of the same place,)
and in what manner. the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to improvements in furnace-grates, and the novelty will
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page_text: be fully understood from the following description and claims when taken in
connection with the accompanying drawings, in which-
Figure 1 is a plan view of my improved furnace-grate constructed according to
my improveinents. Figure 2 is a vertical sectional view taken in the plane
indicated by the dotted linex of Figure 1. Figure 3 is an inverted plan view.
Figure 4 is a perspective view of one of the rock-shafts removed, and Figure 5
is a cross-sectional view of one of the grate-bars.
:
Referring by letter to the said drawings, A indicates a frame, which may be
that of any fire-box adapted to support the grate. Journalled at opposite ends of
this frame and in the side walls thereof are rock-shafts a. These rock-shafts are
of a peculiar form, having alternating bearings or loops b, to which the opposite
ends of the respective grate-bars are secured, and the rock-shafts are each provided
with a depending arm d for the attachment of a connecting-bar B.
C indicates the grate-bars which are also of a peculiar construction, having zigzag
sides so formed that the projection of one bar will lie at a point directly opposite
the cut-out portion of the opposite bar and partly within the same, and when the
bars are placed in position in the grate such projections will alternate. These
grate-bars are also of a tapering form-that is to say, they taper from above
downwardly the object of which will be presently explained. The bars are
furthermore provided with means for securing them in the loops or bearings of
the rock-shafts, and in the present illustration I have shown the bars as provided
with a depending arın at opposite ends to enter the loops b, and be secured by a
cross-pin e, although I do not wish to confine myself to this precise means.
It should be here remarked that while the projections on the side of one bar are
at points opposite the cut-out portions of the adjacent bar and partly within the same,
yet they do not come so close together as to prevent the vertical vibration of each
other in operation.
The bars and rock-shafts should be so arranged within the furnace that the bars may
have a slight longitudinal play. One of the rock-shafts is provided with a hand-
lever D for the grasp of the operator, which when reciprocated will impart a
reciprocating motion to the grate-bars, at the same time giving them a vertical
vibration. If desired this lever D may-by a simple alteration of the mechanical
detail be made to operate from the front of the grate-bars. It will thus be seen that
by having the grate-bars tapering and corrugated when they have been reciprocated
they will have a grinding action upon the cinders, so that the latter will not choke
between the bars, but may be ground to a certain extent and together with the ashes
deposited in the ash-box beneath.
1 am aware that it is not new to provide a rock-shaft with alternating arms to
furnish bearings for grate-bars, whereby they may be reciprocated in opposite
directions.
I am also aware that grate-bars have been provided on opposite sides with teeth or
projections, the teeth being so arranged that those of one bar will come opposite the
space between the teeth of the adjacent bar; but I am not aware that any one has
ever made a grate-bar of the form I have here illustrated, viz.: a bar having its
opposite sides of serpentine of corrugated form and tapering from above downwardly,
the bars thus formed being placed in such a position that the projection on the side
of one bar will come at a point opposite the cut-out portion of the adjacent bar.
Now, by having the bars tapering and of the form described, when vertically recipro-
cated in opposite directions, the projection of one bar will partly enter the cut-out
portion of the opposite one. This will cause a grinding action upon clinkers and coals
falling between the bars and effectually serve to remove the same and give a free
passage for a draft to the fire.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:

page_text: and the projected and cut-out portions both tapering from above downwardly the depth
of the bar, whereby, when two bars are placed in position, and reciprocated in opposite
directions a grinding action will be caused on clinkers or the like coming between
them, substantially as specified.
2. A furnace grate-bar having its opposite sides of serpentine or corrugated form,
and the projected and cut-out portions both tapering from above downwardly the
depth of the bar, in combination with a furnace, the rock-shafts having bearings for
said bars, the bar connecting the rock-shafts, and a lever for rocking one of the shafts,
substantially as specified.
Datad this 96th day of November 1880
HORN & SON,
Applicant's Agents.