IMPROVEMENTS IN AND APPLICABLE TO FURNACES. GRATES. AND STOVES
Year: 1872

page_text: LETTERS PATENT to William Young, of 34, Queen Street, in the City
of London, Lamp Manufacturer, for the Invention of "IMPROVEMENTS
IN AND APPLICABLE TO FURNACES. GRATES. AND STOVES."
Sealed the 14th January 1873, and dated the 28th November 1872.
PROVISIONAL SPECIFICATION left by the said William Young at the
Office of the Commissioners of Patents, with his Petition, on the
28th November 1872.
I, WILLIAM Young, of 34, Queen Street, in the City of London, Lamp
5 Manufacturer, do hereby declare the nature of the said Invention for
“IMPROVEMENTS IN AND APPLICABle to Furnaces, GRATES, AND STOVES," to be as
follows:
C
Whereas a Patent was granted unto me bearing date 19th September
1856, No. 2202, in which among other things there was contained a
O description of a screw for raising the fuel to the fire in furnaces, fire-
places or stoves." And whereas a Patent was also granted to me
bearing date 11th April 1866, No. 1029, for the Invention of "a series of
spiral bars formed into a screw or incline with spaces in it for the double
purpose of admitting air to the fuel and raising the fuel to the fire."

page_text: By this
Now my present Invention consists in forming a screw the metal of
which is corrugated or channelled on each side so as to provide spiral
grooves or channels semicircular in cross section for the passage of air
into the fire both on the upper and under side of the screw.
means air is admitted to the fuel on both sides of the screw, and the
fuel is raised to the fire (by the turning of the screw) without either
perforating the screw or producing the same effect by forming it of
separate spiral bars with spaces between them.
Screws formed with spiral air passages on each side produced by the
double corrugation of the metal may be made lighter and stronger and
more economically than with the air passages made by perforations or
spaces through the screw.
In some cases, it is intended to make the fire-grate or receptacle for
the fuel of fire-clay and enclosed all round except the opening for
the corrugated screw with its spiral air passages on its upper and under
surfaces and the bottom bars of the grate.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Young in the Great Seal Patent Office
on the 28th May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
YOUNG, of 34, Queen Street, in the City of London, Lamp Manu-
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of November, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Young, Her special licence
that I, the said William Young, my executors, administrators, and
assigns, or such others as I, the said William Young, my executors,

page_text: administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
3 Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
AND APPLICABLE TO FURNACES, GRATES, AND STOVES," upon the condition
(amongst others) that I, the said William Young, my executors or ad-
ministrators, by an instrument in writing under my, or their, or one of
their hands and seals, 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.
NOW KNOW YE, that I, the said William Young, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Drawings hereunto
annexed and to the letters and figures marked thereon (that is to
say) :-
My Invention of "Improvements in and Applicable to Furnaces, Grates,
and Stoves" has reference to furnaces, grates, and stoves in which the
fresh fuel is introduced into the bottom of the fire by means of a screw,
and consists in the improvements herein-after described on the Inven-
tions of the Patents herein-after referred to.
Whereas a Patent was granted unto me bearing date Nineteenth
September, One thousand eight hundred and fifty-six, No. 2202, in the
Specification of which there was contained, among other things, a
description of a screw for raising the fuel into the fire in furnaces, firc-
places, or stoves." And whereas a Patent was also granted to me
bearing date Eleventh April, One thousand eight hundred and sixty-six;
No. 1029, for the Invention of "a series of spiral bars formed into a
screw or inclined plane with spaces in it for the double purpose of
admitting air to the fuel, and raising fuel to the fire.”
Now my present Invention relates in the first place to the improved
construction of the screw, and consists in forming the screw out of iron
which is corrugated or channelled on each side so as to provide spiral
grooves or channels semicircular or nearly so in cross section for the
passage of air into the fire both on the upper and under side of the screw.

page_text: Screws formed with spiral air passages on each side produced by the
double corrugation or channelling of the metal may be made lighter
and stronger and more economically than with the air passages made
entirely by perforations or spaces through the screw.
And my Invention consists in the second place in making the fire-
grate, stove, or receptacle for the fuel of fire-clay or other suitable
material capable of resisting the heat of the fire and enclosed all round
except at the opening for the screw and the bottom bars of the grate.
Grates made in this form may have applied to them screws formed
either as herein-after described, or as described in the Specifications of
either of the Patents above referred to.
The said fire-clay receptacle or lining may be covered with ornamental
bricks, tiles, porcelain, enamelled metal, or other suitable material.
By means of this construction of the grate or stove the air is caused
to pass more directly to the screw, and the heat is longer retained in the
fire-grate.
Having thus stated the nature of the said Invention I will proceed to
describe more particularly in what manner the same is to be performed
by the aid of the accompanying Drawings, in which are represented the
mode of forming the screw with corrugations or channellings for air
passages, and also the mode of constructing the fire-grate above referred
to

page_text: In all these several Figures the same letters of reference indicate
corresponding parts.
In Figures 1 and 2, A is the screw mounted on an axis B, to which is
applied a socket C for the insertion of a lever for turning the screw on
its axis as required. The screw is mounted so as to work within an
open mouthed box D fitted to the front part of the fire-grate E. This
box D is also open at the back, as shewn in Fig. 2, in order that the fresh
fuel after being supplied at the mouth or front of the box may by the
turning of the screw be forced into the bottom of the fire at the back of
the same.
F is a support for the box; G is the grate for containing the
burning fuel; H is a back for the same made of fire-clay.
In Figures 3 and 4, I is a grate or stove composed of fire-clay or other
suitable fire-resisting material, the outer surface of which may be
covered and ornamented with glazed tiles, porcelain, enamelled metal or
other suitable material. In this grate or stove the fuel is enclosed all
round except at the box in front within which the screw works, and it
may be made of a circular or other suitable form in horizontal section.
It also forms a hopper for the fuel with its sides widening upwards. By
enclosing the fuel in this manner the air will be caused to pass directly
through the air passages of the screw into the fire, and the solid body of
fire-clay will become heated and emit heat to the room in which it is
fitted. A fire-grate or stove constructed in this manner may have
applied to it a screw constructed either of corrugated or channelled iron
to form the required air passages, or as in either of the Patents above
referred to.
In Fig. 5, the improved screw with corrugations or channellings for
air passages is shewn in its normal position while the fire is burning;
and in Fig. 6 it is shewn as turned into the position required for
admitting a charge of fresh fuel; Fig. 7 shews the arms of the screw
on each side of the axis by means of which the fuel is raised into the fire
when the screw is turned. When the screw is applied to a locomotive
an excentric or other motion is used.
Having thus described the nature of the said Invention, and in what
manner the same is to be performed, I hereby declare that what I claim
as of my Invention is,--.
First. The construction of screws for feeding fuel into grates, stoves,
and furnaces of corrugated or channelled iron with air passages formed

page_text: on both sides of the screw by the corrugations or channelings as
described.
And, Secondly. The construction of fire-grates and stoves of fire-clay
or other suitable fire-resisting material enclosed in the manner described
and adapted to receive a screw in the front or other convenient part of
the grate or stove as described.
In witness whereof; I, the said William Young, have hereunto set
my hand and seal, the Twenty-eighth day of May, in the year of
our Lord One thousand eight hundred and seventy-three.
Witness,
WILLIAM SPENCE,
8, Quality Court,
Chancery Lane.
WILLIAM YOUNG. (L.S.)