Improvements in Furnace Grate Bars.
Year: 1890

page_text: Date of Application, 18th Mar., 1890
Complete Specification Left, 7th July, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Furnace Grate Bars.
I, GEORGE WILLIAM HAWKSLEY Brightside Boiler Works, Sheffield in the County
of York, Manufacturer, do hereby declare the nature of this invention to be as
follows:
This invention relates to improvements in the construction of grate bars for furnaces
and the like, having for its object to facilitate the cleaning of the fires and otherwise
improve the said bars.
In carrying out my invention, I may make the bars of any desired dimensions in
length and breadth, and preferably of a box-like construction, that is an open frame
and crossed diagonally by any number of ribs. These ribs are preferably so arranged
that when the bars are placed alongside in pairs, the ribs run in opposite directions,
one to the right and one to the left, this arrangement conducts the cinder or slag,
when the rake is used, to the most convenient position for cleaning the fire, materially
helping the man with his work.
The face of each rib is grooved or hollowed longitudinally to hold or retain fine
ashes or dust which prevents slag from adhering to the bar, and thus materially
prevents the bar from being burnt.
One end of the bar is cut away on the underside to form an incline, this rests upon
a similar incline upon the metal end plate, and permits the bar to expand when heated,
without damage, as would be the case if the bar was held rigidly at both ends.
A number of distance lugs project from the sides of the bars, to leave an air space
between each bar.
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COMPLETE SPECIFICATION.
Improvements in Furnace Grate Bars.
I, GEORGE WILLIAM HAWKSLEY Brightside Boiler Works, Sheffield in the County
of York, Manufacturer 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 :-
This invention relates to improvements in the construction of grate bars for furnaces
and the like, having for its object to facilitate the cleaning of the fires, and to other-
wise improve such firahar

page_text: By this arrangement the ribs, the slag or or cinder when the fire is being raked, is
made or caused to converge to the centre being the most convenient position for
cleaning the fire, and thus materially assisting the stroker with his work.
The face of each diagonal rib B, is grooved or recessed longitudinally see Fig. 3, to
catch and retain the fine ashes or dust from the fuel, which prevents the slag from
adhering to the bar, and the bar itself from being burnt.
One end of the bar is cut away at C, on the underside to form an incline, and this
inclined part rests upon a similar reversed incline upon the metal end plate of the
furnace, not shown, and permits the bar to expand or lengthen when it becomes heated
without causing any damage as would be the case if the bar was held in such a manner
that it could not elongate.
A number of stops or lugs D, project from the sides of the bars, to prevent the bars
coming in contact, and thus an air space is provided between each bar.
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 :-
A Furnace Grate-bar consisting of a frame A, with any number of diagonally placed
transverse ribs B, provided with longitudinally grooved faces, substantially as herein-
before described and illustrated.
Dated the 30th day of June 1800
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.