Improvements in or relating to Grates for Furnaces.
Year: 1896

page_text: [Communicated from abroad by PIERRE DE SMET, of Rue Van Geerdt,.Antwerp,.in
the Kingdom of Belgium, Merchant.]
Improvements in or relating to Grates for Furnaces.
.I,. WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6; Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil. Engineer,
do hereby declare the nature of this Invention to be as follows:-
The invention consists in forming the grates of furnaces by means of, rect-
angular bars of small-thickness whose extremities cut in triangular notches rest
upon bars of wrought or cast iron of square section placed so as to have their
diagonals vertical and horizontal so that the fire bars have good support, at the
sanic time with complete liberty, for expansion, and with the passage of, the air
under the fuel perfectly free. The separation of the bars is regulated by little
projections cast on the said bars. If the bars are of wrought iron these little pro-
jections may be produced by means of rivets or pins secured to the said bars.
In carrying the invention into effect the fire bars are preferably formed of
narrow piates of wrought or cast iron of considerably, greater depth than width
and the projections aforesaid are applied on the vertical surfaces of said plates as
may be necessary. The supporting cross bars are preferably placed diamond
fashion with respect to the fire bars proper, the triangular notch in the ends of the
said firé bars thus fitting closely upon the inclined surfaces of the supporting bars.
Dated this 12th day of November 1896
Improvements in or relating
ces.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street Birmingham, in the County of Warwick, Civil Engineer
027

page_text: 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 invention consists in forming the grates of furnaces by means of rect-
angular bars of small thickness whose extremities cut in triangular notches rest
upon bars of wrought or cast iron of square section placed so as to have their
diagonals vertical and horizontal so that the fire bars have good support at the
same time with complete liberty for expansion, and with the passage of the air
under the fuel perfectly free. The separation of the bars is regulated by little
projections cast on the said bars. If the bars are of wrought iron these little pro-
jections may be produced by means of rivets or pins secured to the said bars.
In the accompanying drawings Figure 1 is a perspective view and Figure 2
is a plan of a portion of the improved grate.
Figure 3 is a vertical section of a furnace fitted with the same drawn to a
reduced scale.
The ends of the bars A are slightly inclined so as to avoid any projections which
might hinder the movements of the
The length of the bars A depends on that of the grate and on the number of
supports B which it is desired to place within this length, the thickness of the
bars may be four or five millimeters and their distance apart which depends on the
length of the projections or pins C may be six or eight millimeters according to the
nature of the fuel. The section of the bars is preferably rectangular as shewn in
Figure 3 which permits of them being turned over if the face which carries the
fuel becomes burnt, but experiment appears to indicate that owing to the current
of air which passes through these grates the surface of the bars is well preserved.
Having now particularly described and ascertained the nature of my said In-
vention, and in what manner the same is to be performed as communicated to me
by my Foreign Correspondent I declare that what I claim is :--
A grate formed of thin bars of a rectangular section having their ends notched
triangularly and resting on square cross bars which are placed diamond fashion,
that is to say, with their diagonals in vertical and horizontal planes and which are
separated from one another by a distance a little greater that the length of the
grate-bars, so that the latter are free to expend and can be turned over when
their upper surface is burnt.
Dated thin with day of
1007
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester and Birmingham.
Patent Agents for the Applicant