IMPROVEMENTS IN FURNACES AND HEATING APPARATUS, HAVING REFERENCE TO THE CONSUMPTION OR PREVENTION OF SMOKE
Year: 1868

page_text: LETTERS PATENT to David Jones, of Church Street, Inverness, in the
County of Inverness, Mechanical Engineer, for the Invention of
"IMPROVEMENTS IN FURNACES AND HEATING APPARATUS, HAVING REFERENCE
TO THE CONSUMPTION OR PREVENTION OF SMOKE."
Sealed the 5th September 1868, and dated the 1st June 1868.
PROVISIONAL SPECIFICATION left by the said David Jones at the
Office of the Commissioners of Patents, with his Petition, on the
1st June 1868.
1, DAVID JONES, of Church Street, Inverness, in the County of
Inverness, Mechanical Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN FURNACES AND HEATING APPARATUS, HAVING
BEFERENCE TO THE CONSUMPTION OR PREVENTION OF SMOKE," to be as follows:-
The said Invention embraces a mode or modes of constructing furnaces,
whether for steam boilers of locomotive or stationary engines or for other
uses, and also kitchen ranges, stoves, and various descriptions of heating
apparatus, so as to cause the smoke or unconsumed gases arising from
the, fuel to pass through that portion of the fuel which is in a thoroughly
or more completely incandescent state; and the said mode or modes

page_text: consist in erecting, disposing, or making in the furnace or apparatus a
transverse partition or bridge across the same, with soffit or under surface
at a level below the exit or discharge for the gases, in combination with
the erection or disposition of fire-bars, dead plates, or fuel supporters, at
a sufficient angle or in such manner as to deliver or supply the fuel
towards, underneath, and past the bridge into what I call the incan-
descent chamber," and in combination with draught doors, dampers,
or other equivalents for directing the current through the said chamber
to the exit or discharge.
To perform or carry out the Invention the partition or bridge may, if
for steam boilers, be constructed as a water space or may be of fire-brick,
which latter is also more particularly suitable for stoves and kitchen
ranges. Air may be fed to the fuel from above or below the bars, an ash
pan, damper, and top door, one or the other, or both, being opened to
establish the current as desired. The bars and dead plates or some of
them may be hinged for conveniently cleaning or emptying contents.
And I would remark that an independent or additional air feed may be
established to the incandescent chamber, and also that the furnaces and
apparatus may be surrounded or partly surrounded by water spaces or
chambers if desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said David Jones in the Great Seal Patent Office on
the 8th September 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
JONES, of Church Street, Inverness, in the County of Inverness,
Mechanical Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of June, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-
first year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said David Jones, Her special licence that I,
the said. David Jones, my executors, administrators, and assigns, or
such others as I, the said David Jones, my executors, 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,

page_text: should and 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 for "IMPROVEMENTS IN FURNACES AND
HEATING APPARATUS, HAVING REFERENCE TO THE CONSUMPTION OR PREVENTION OF
SMOKE," upon the condition (amongst others) that I, the said David
Jones, my executors or administrators, 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 David Jones, do hereby declare
the nature of the 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 here-
unto annexed, that is to say:
The said Invention embraces a mode or modes of constructing furnaces,
whether for steam boilers of locomotive or stationary engines or for other
uses, and also kitchen ranges, stoves, and various descriptions of heating
apparatus, so as to cause the smoke or unconsumed gases arising from
the fuel to pass through that portion of the fuel which is in a thoroughly
or more completely incandescent state; and the said mode or modes
consist in erecting, disposing, or making in the furnace or apparatus a
transverse partition or bridge across the same, with soffit or under surface
at a level below the exit or discharge for the gases, in combination with
the erection or disposition of fire-bars, dead plates, or fuel supporters, at
a sufficient angle or in such manner as to deliver or supply the fuel
towards, underneath, and past the bridge into what I call "the incan-
descent chamber," and in combination with draught doors, dampers,
or other equivalents for directing the current through the said chamber
to the exit or discharge.
Having thus set forth the nature of my said Invention, I will proceed
to describe the manner in which it is to be and may be performed.
The partition or bridge may, if for steam boilers, be constructed as a
water space or may he of fire-brick. Air may he fed to the fuel from
above or below the bars, an ash pan, damper, and top door, one or the
other; or both, heing opened to establish the current as desired; and the
bars and dead plates or some of them may he hinged for conveniently

page_text: cleaning or emptying contents.
An independent or additional air feed
may be established to the incandescent chamber, and also that the
furnaces and apparatus may be surrounded or partly surrounded by water
spaces or chambers if desired.
The accompanying illustrative Drawing represents at Figures 1 and 2
the application of the Invention to the fire-box of a locomotive engine.
In Figure 1 the transverse partition or bridge a is shewn as constructed
of fire-brick, and in Figure 2 is likewise a fire-brick bridge a and also a
water-space bridge b; either kind may be used separately, and when two
partitions are used both may be of either kind, but the top of the one
of them nearest to furnace door leaves a passage way c between itself
and the roof and does not quite extend thereto. The under side or soffit
of each bridge is below the level of the smoke tubes d. e is what I call
the incandescent chamber, over or through which the gases must travel
in their passage to the tubes d. The currents are, as denoted by the
arrows f, the air feed as usual being from intended furnace door at g,
over the fuel and partly from ash pan h, beneath the bars i, and through
the fuel. A steam jet may be used in the chimney to increase the blast.
is ash pan damper to be used in conjunction with furnace door or
separately for regulating the draft; 7 is hinged dead plate for removal
of clinkers, the fuel in the stoking being pushed forward or delivered on
to this in the stoking.
Figure 3 represents the application of the Invention to furnace of an
existing stationary boiler which may be made with very little expense.
a, a, are two fire-brick bridges, one extending upwards to under side of
the boiler m, and the other not so far, and both with their soffit or under
side below the level of the exit or discharge n for the gases; e, incan-
descent chamber; f, f, arrows denoting current; and g, position of
furnace door.
In erecting stationary boilers and furnaces as distinguished from the
conversion of existing ones to the purposes of my Invention they may
be built on the above-described plans of the locomotive fire-box, only
adopting fire-brick or suitable material.
In converting existing furnaces to boilers fired in the flues, where the
flues are large the alteration can readily be made therein, but where they
are small an improved furnace may be built out at the end of the boiler
opposite the flue or flues,

page_text: Figure 4 exhibits improved kitchen range apparatus in accordance with
the Invention. b, b, are fire-brick bridges with soflit below level of
lue d; e is incandescent chamber; and g, firing door; i, the fire-bars;
and 1, hinged dead plate. The current arrows indicate that though the
grate may be filled with coals, and these heated to the top, the heated
gases or part of them are drawn and pass over the small bridge b rather
than passing into the room, and which will take place notwithstanding
that the top door ŷ may be opened. In this and in other cases the coals
descend on the inclined bars into the incandescent chamber without
being poked down, or with but little attention in this respect. The
bars i may, if desired, extend to the bottom and be hinged to the top
dead plate y.
In witness whereof, 1, the said David Jones, have hereunto set my
hand and seal, this Twenty-eighth day of August, One thousand
11
1
Witness,
JAMES ROSS, of Inverness, N.B.,
Solicitor.
DAVID JONES. (L.S.)