Improvements in Furnace Grates.
Year: 1898

page_text: Date of Application, 30th Nov., 1898-Accepted, 21st Jan.,
1899
COMPLETE SPECIFICATION.
Improvements in Furnace Grates.
I, VALENTIN SPINETTE, of 141, Rue de Brabant, Brussels, Belgium, Constructer,
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 subject of the present application is a novel grate for furnaces composed of:
fire bars having circular sallies tops or heads, and affording such a surface for com-
bustion, that the admission of air to the fuel will be very large and will insure a
very regular and a very intense combustion.
And in order that my invention may be thoroughly understood, I now proceed to
describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is a part plan view of the grate.
Fig. 2, is a vertical section on the plane A, B, Fig. 1.
Fig. 3, is a view in elevation of one of the ends of one of the bars of the grate.
Fig. 4, is an underside view of a portion of the grate.
Fig. 5, shows a side view of a portion of a modification of the fire bars.
The grate consists of fire bars formed of straight metal bars C the sectional form
of which is of an elongated lozenge shape the largest diagonal of which is vertical.
Upon each of these fire bars is cast or formed truncated conical extensions D
arranged as shown in the drawing annexed, and the large base of which is situated
towards the top. Each of the fire bars C terminates at its two extremities in a
gudgeon or extension D¹ having side projections which fit into each other, the said
extension D serves to rest the fire bar upon transverse supports or bearers such
as E in Fig. 3. Each of these gudgeons or projections, moreover, has also on
one side two lateral vertical projections m, m, and on the other side a single pro-
jection n, which latter is adapted to rest between the two extensions m, m, of an
adjacent fire bar when these are placed upon the supports or bearing bars E to
form the fire grate, in such a manner as to insure the stability of the fire bars.
The conical projections of the fire bars are so arranged on two neighbouring
fire bars as to offer in plan a quincunx as is shown in Fig. 1. The whole assemblage
of the upper bases of these conical projections or extensions constitute the surface
of the grate. An inspection of Fig. 1, will clearly show the large section for the
admission of air at the surface of the fire grate. The arrangement of the circular
heads formed by the conical projections or extensions, admits, moreover, of an
extensive circulation of air upon the lateral or side faces of the fire bars, which
will have the effect of preventing the said fire bars from becoming bent or warped.
The upper bases of the truncated conical projections of the fire bars are formed
slightly concave Fig. 2, in order to admit of the fuel lodging thereon, and of its
becoming surrounded by the air coming up from below the grate.
In order to render the bars of the grate movable so as to admit of their being
shaken with the object of preventing the formation of clinker and to cause the
slag to fall into the ash pit, the extremities of each of the above mentioned bars

page_text: are sometimes formed of a round section or cylindrical as is shown at d in Fig. 5,
and are arranged to rest in circular recesses or bearings formed in the transverse
supporting pieces or bearers a, these latter supporting pieces or bearings being
covered by pieces 6 having circular recesses corresponding to those in the support-
ing piece, and these recesses forming two and two a circular opening or bearing
of a diameter larger than that of the gudgeon d of the corresponding fire bar,
which is introduced into this opening, and which is capable of moving through a
certain arc in every direction as is shown in Fig. 5.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
-
1. A grate for furnaces characterized by fire bars composed of straight metal
bars the form of which in section is that of a lozenge, and which have cast or
formed thereon truncated conical extensions or projections the bases of which are
situated towards the top, or uppermost, and are formed slightly concave, the said
bars resting upon transverse supports or bearers, and the truncated conical projec-
tions being arranged upon two neighbouring or adjacent bars in such a manner
that their upper bases will be presented in quincunx to form the surface of the
grate.
2. In a grate for furnaces such as that claimed in the first claim, the arrangement
wherein the ends of the fire bars are formed cylindrical and rest or are supported
in recesses made in transverse metal supports or bearers, these supports being each
covered by a metal piece provided with corresponding recesses, so that the end of
each bar passed into the circular opening formed by two corresponding recesses in
the supporting piece or bearer and of the piece which covers it, will be capable of
moving itself in this opening which is of a larger diameter, for the purpose of
rendering the grate movable, and to admit of its being shaken or rocked in order
to cause the slag to fall from the furnace into the ash pit, and to prevent the for-
mation of clinker.
Dated this 30th day of November 1898
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.