IMPROVEMENTS IN THE CONSTRUCTION OP GRATES
Year: 1854

page_text: LETTERS PATENT to Peter Armand le Comte de Fontaine Moreau, of
4, South Street, Finsbury, London, and 39, Rue de l'Echiquier, Paris,
Patent Agent, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION
OP GRATES "A communication.
PROVISIONAL SPECIFICATION left by the said Peter Armand le Comte
de Fontaine Moreau at the Office of the Commissioners of Patents, with
his Petition, on the 19th October 1854.
I, PETER ARMAND le Comte DE FONTAINE MOREAU, of 4, South Street,
Finsbury, London, and 39, Rue de l'Echiquier, Paris, Patent Agent, do
hereby declare the nature of the Invention of "IMPROVEMENTS IN THE CON-
STRUCTION OF GRATES" to be as follows:-
The Invention communicated to me consists in constructing the grates of
furnaces & other grates of two frames, each supporting a tier of moveable
bars, and provided each with 2 endless screws, passing over the extremities
of the bars, and bearing on plates set at back and front. The two upper
screws, when made to rotate, move the bars on the upper frame to the back of
the grate, where they fall on to the lower frame, and returning thereon to the
front, are elevated to their former position. The width of the thread of these
screws is proportioned to the number of the bars; that of the upper screw is
equal to the interval, while that of the lower, where fewer bars are required
to allow ingress of air and escape of ash, is two or three times as large.
Motion is communicated to the screws from an axle on which wheels are
set, working in a pinion set on the extremity of the screw.

page_text: The above apparatus, which is adapted for the consumption of smoke,
may be fixed or moveable, or may be set on wheels, in which case it can
be taken out at any moment for cleaning. Ordinary furnace bars can be
employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Peter Armand le Comte de Fontaine Moreau in the Great
Seal Patent Office on the 19th April 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
ARMAND le Comte DE FONTAINE MOREAU, of 4, South Street, Finsbury,
London, and 39, Rue de l'Echiquier, Paris, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of October, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Peter Armand le Comte de Fontaine Moreau, Her special license
that I, the said Peter Armand le Comte de Fontaine Moreau, my executors,
administrators, and assigns, or such others as I, the said Peter Armand le
Comte de Fontaine Moreau, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should & lawfully might make, use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF
GRATES," (communicated to me by a foreigner residing abroad), upon the
condition (amongst others) that I, the said Peter Armand le Comte de
Fontaine Moreau, by an instrument in writing under my hand and seal;
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent..

page_text: NOW KNOW YE, that I, the said Peter Armand le Comte de Fontaine
Moreau, do hereby declare the nature of the said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, reference being had to the
Drawing hereto annexed, & to the figures & letters marked thereon, that
is to say:
The Invention communicated to me consists in constructing the grates of
furnaces and other grates of two frames, each supporting a tier of moveable
bars, and providing each with two endless screws, passing over the extremities
of the bars, and bearing on plates set at back and front. The two upper
screws, when made to rotate, move the bars on the upper frame to the back of
the grate, where they fall on to the lower frame, & returning thereon to the
front, are elevated to their former position. The width of the thread of these
screws is proportioned to the number of bars; that of the upper bar is equal
to the interval, while that of the lower, where fewer bars are required to allow
ingress of air and escape of ash, is two or three times as large. Motion is
communicated to the screws from an axle on which wheels are set, working
in a pinion set on the extremity of the screw.
The above apparatus, which is adopted for the consumption of smoke,
may be fixed or moveable, or may be set on wheels, in which case it can
be taken out at any moment for cleaning. Ordinary furnace bars can be
employed.
DESCRIPTION OF THE DRAWING.
Figure 1, plan of the apparatus complete, with the exception of the hopper
and door, serving to aliment the grate with coal. In this Figure the screw
above to the right has been raised, to shew the top and bottom bars. Figure 2
is a section through A, B, Figure 1, shewing the form of the surface and eleva-
tion of the bars, and the form of the cams at the extremity of the screw, the
bar guides, and the arrangement of the organs placed in the sides of the ash
box. Figure 3 is a section through C, D, Figure 1, of the apparatus com-
pletely set up, with the exception of the door for feeding the furnace with
coal, and the levers to raise or lower it. Figure 4, elevation. In this Figure
the apparatus and moveable grate are seen complete, with the exception
of the bars. In all these Figures the same letters of reference represent
similar parts.
A, cast-iron framing, provided at its hind part with supports, guides, &
bearings; B, cast-iron plates fixed upon the front part of the frame, and
serving as bearings to the screws, as well as to the working rods of the pinions;
C, cast-iron screws or spirals, or rolled iron fillets, moulded upon the round

page_text: iron axis, which serve as core to the screws; D, cast-iron pinion fixed upon
the axis or cores of the spirals; E, cast-iron axis, provided at its right and left
ends with two parts of. an endless screw, which sets the pinions in motion;
F, pulley, the gearing of which is mounted upon the axis, setting the pinions
in motion; G, cast-iron bands, serving as guides & slides to the bars;
H, cast-iron ties or cross pieces, fixed by means of bolts into the two sides of
the frame; I, cast-iron bars; the extremities of which have the form of a cog,
moving in an endless screw; J, cast-iron plates, serving as fronting to the
furnace, as slides to the door, as fulcrum to the levers, and as sides to the
hopper; K, cast-iron frame, furnished with bricks or refractory tiles, and
serving as feeding door; L, cast-iron lever, serving to raise or lower the door,
and provided with a counterpoise for the equilibrium; M, plate-iron hopper
which receives the combustible; N, small superposed hopper, opening at the
extremity of the vault of the furnace, where the coal is very inflammable,
having passed through the space between the place where the coals are laid
and the 'extremity of the vault; thus, the coal dust, in falling upon the coal
already burning, will be set on fire immediately without passing through the
bars. O, moveable guides, provided with counterpoise for guiding the bars in
the ascending and descending movement; P, refractory brick arch for heating
the coal; Q, refractory brick arch, serving as fire bridge, and covering a
number of bars.
And having now described the nature of the said Invention, and the
manner of carrying the same into effect, I would have it understood that I do
not claim as of my Invention any of the parts herein-before described when
taken separately, nor do I confine myself to the precise details of construction
herein laid down, as the same may be varied; but what I claim as constituting
my
Invention, & intended to be protected by the herein-before in part recited
Letters Patent, is, the mechanical arrangements for the construction of a
moveable. grate, as herein-before described, and referred to in the several
Figures of the Drawing.
In witness whereof; I, the said Peter Armand le Comte de Fontaine
Moreau, have hereunto set my hand and seal, this Sixteenth day of
April, 'in' the
year of our Lord One thousand eight hundred and fifty-
L' DE FONTAINE MOREAU. (L.S.)