CERTAIN IMPROVE- MENTS IN THE CONSTRUCTION OF FURNACES, STOVES; GRATES OF FIRE-PLACES
Year: 1825

page_text: tha:21
JACOMB'S SPECIFICATION."'
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
JACOMB, of Basingball Street, in the City of London, Wool Broker, send
greeting.
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WHEREAS His present most Excellent Majesty King George, the Fourth,
by His Letters Patent under. the Great Seal of Great Britain, bearing date at
Westminster, the Fifteenth day of September, in the sixth year of His reign,
did, for Himself, His heirs and successors, give and grant unto me, the said
Charles, Jacomb, His especial licence that I, the said Charles Jacomb, my
exors, admiors, and assigns, or such others as I, the said Charles Jacomb,
my exors, admiors, or assigns, should at any time agree with, and no others,
from time to time and at all times during the term of years therein expressed,
should and lawfully might make, use, exercise, and vend, within England, Wales,
and the Town of Berwick upon Tweed, my Invention of "CERTAIN IMPROVE-
MENTS IN THE CONSTRUCTION OF FURNACES, STOVES; GRATES OF FIRE-PLACES;" in
which said Letters Patent is contained a proviso obliging me, the said Charles
Jacomb, by an instrument in writing under my hand and seal, particularly to
describe and ascertain the nature of my said Invention, and in what manner the
same is to be performed, and to cause the same to be inrolled in His Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said recited Letters Patent, as in and by the same,
reference being thereunto had, will more fully and at large appear.
3

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Charles Jacomb, do hereby declare that the nature of my said Invention, and
the manner in which the same is to be carried into effect and practice, arc
particularly described and ascertained as follows, and by the Drawing hereto
annexed, the letters of reference in the Drawing attached, to the various
views, elevations, and sections denoting the same parts throughout (that is to
say):
By Fig. 1 is represented an elevation or side view of a cylindrical furnace,
stove, grate, or fire-place formed of iron or other suitable material, and supported
on the hollow axis A, A, which rests and revolves when required, as herein-after
described, on the iron or other metallic supports B, B. a, a, a, a, &c., represent
the external bars, which contain and constitute the support for the coal, coke, or
other material used as fuel, and which are rivetted or otherwise effectually fixed
to the circular ends C, C. Fig. 4 represents an end view of my cylindrical
furnace, stove, grate, or fire-place, by which it is shewn that the circle C, C, or
end of the cylinder is closed at the one end, and divided into equal portions
or compartments by the bars D, D, D, at the other end. These divisions,
formed by and consisting of metallic or other bars, continue or extend the
whole length of the cylinder, so that the furnace, stove, grate, or fire-place is
thereby divided into any required number of separate and distinct portions or
compartments, into and with which the doors E, E, E, severally open and
communicate. These doors are connected to and hung upon the bars or arms
D, D, D, this arrangement of my improvement having three compartments
or divisions. A represents the interior hollow axis or cylinder, which is like-
wise connected by bars from end to end, as will appear more clearly shewn by
Fig. 2, where the exterior bars attached to the circles C, C, are omitted for the
purpose of shewing the nature of the framework of my circular furnace, stove,
grate, or fire-place. Through the opening A, air is admitted for the support
of combustion, and for the requisite stoking or clearing the fire of ashes,
clinkers, or other residuum, as well as for the introduction of steam, tar, or other
material for the increase of heat or combustion. The external bars of this
arrangement of my furnace, stove, grate, or fire-place may be fixed on sepa-
rately or in segments, as shewn at Fig. 3, which segments may if required be
formed by means of a simple contrivance, as the doors or openings for the
introduction of fuel, or for other purposes. The arrangements and modifica-
tions, however, of the apparatus by which my improvement in the construction
of furnaces, stoves, grates, or fire-places are effected may be varied according
to the purposes for which they are to be applied, and 1 herein describe two, the

page_text: same principle being applicable to various other arrangements and modifica-
tions well known to workmen conversant in the construction of furnaces, stoves,
grates, and fire-places. The first arrangement or modification is shown in the
Fig. 1 to Fig. 7, inclusive; and the second arrangement or modification in
Fig. 8 and Fig. 9. Fig. 5 is a plan of one of the end circles or frames C, C,
with the arms or bars D, D, D, as herein-before described. Fig. 6 is a trans-
verse section of Fig. 4, and Fig. 7 is a longitudinal section of the same appa-
ratus, as shewn at Fig. 1. To put this first arrangement of my improvement
in the construction of furnaces, stoves, grates, and fire-places into operation
when applied to a boiler for generating steam, I place it within a flue or
passage formed through the boiler, which flue or passage should be formed to
permit any apparatus to revolve on its axis A, when supported by the feet b, b,
resting on the bottom of the flue or passage through the boiler. My apparatus
is so placed within the flue or passage of the boiler, that the end at which tho
fire doors E, E, E, are fixed shall be flush or paralell to the end or outside
of the boiler, as shewn at Figure 4. In this position I first charge or load the
whole of the space between the exterior and interior cylinders with coal, coke,
or other fuel, at the several fire doors E, E, E, and light or fire the uppermost
portion therein contained in the ordinary manner, air being admitted by means
of the open end of the cylinder A, and through the bars of which the same is
composed or formed. As soon as that portion of the coal, coke, or other fucl
contained in the uppermost compartment is burned to that state in which it
gives off no more smoke or vapour, I gradually turn the whole cylinder on the
hollow axis or centre A, in order that a portion of the coal, coke, or other fuel
contained in the next or adjoining compartment may become also ignited. By
this action it will be seen that the smoke generated or produced by the lighting
of that portion of the coal, coke, or other fuel beneath or immediately con-
tiguous thereto is compelled by the arrangement of my apparatus to pass
through the first lighted portion, and is thereby consumed; when fresh fuel is
required, I throw it into the uppermost division through the door E, and upon
the top of the live or ignited fuel contained therein, and immediately turn the
whole cylinder on its axis, so as to bring the green or fresh fuel under live or
ignited fuel, turning the cylinder more or less, as occasion may require, but
always keeping the live or ignited fuel on the top. By this arrangement of my
apparatus it will be observed that all the component parts of the coal, coke, or
other fuel are made available for the production of heat, and the draft of air
conveyed to the centre of the fire in any quantity, and which may be regulated
to the greatest nicety through the centre of the cylinder. The rotary motion to
be occasionally given to my apparatus here described, may be effected by a

page_text: lever inserted in the holes c, c; c, Figure 1, or by any other 'mechanical con-
trivance, which must depend on the size and nature of the apparatus to which
my improvement is applied, all which are well known to mechanics or workmen
conversant in work of this nature.
The second arrangement of apparatus for my improvement in the construc-
tion of furnaces, stoves, grates, or fire-places is shewn at Figure 8, which
represents a front view or elevation of a domestic grate or fire-place sup-
ported on the axis A, A, which slides and is held in the longitudinal groove
or slit B, B, Figure 9. This, grate or fire-place. is so formed that a door or
opening composed of bars may be placed at the bottom and top thereof, which
doors are made to open and shut, and when shut are held fast by the catch
at X. To put this arrangement of my improvement in furnaces, stoves, grates,
and fire-places in action, 1 light a fire in the ordinary manner with coal or
other suitable material, as near as possible at the top, preferring to place upper-
most some cinders, and green coal undermost. The fire will then gradually
find its way to the bottom, burning with little or no smoke, which together
with the gas or vapour is consumed as emitted by the coal or other fuel; when
fresh coal or other fuel is required, I place it on the top of the ignited fuel,
and shut down the door or opening, which is securely held by the catch X. I
then draw the grate forward in the groove or slit, B, B, Figure 9, and imme-
diately turn it one half revolution on its axis A, and then return it back again
to its former position in the groove or slit B, B. By this action. the live
or ignited fuel is again brought to the top, and thereby causing the smoke, gas,
or vapour emitted by the fresh fuel to pass through that which is already in a
state of ignition, and thereby consuming it. In describing the construction
and the proper method of managing or working the two before-mentioned
applications of my improvement in the construction of furnaces, stoves, grates,
or fire-places, I do not confine my claim to them or to any particular dimen-
sions or parts thereof, all which must depend on the purpose to which my
improvement is to be applied, and the varied constructions, selection of
materials, and diversification of proportions necessary and proper thereto may
be effected, contrived, and arranged by any competent workman in work of
this and the like nature; but I do confine my claim to such arrangement as
shall enable the operator to impart a rotary motion to the furnace, stove, grate,
or fire-place, and thereby to produce the effect, as herein-before described.
In witness whereof, 1, the said Charles Jacomb, have hereunto set my
hand and seal, this Fourteenth day of March, in the year of our Lord
One thousand eight hundred and twenty-six.
CHARLES JACOMB. (L.S.)

page_text: AND BE IT REMEMBERED, that on the Fourteenth day of March, in the
year of our Lord 1826, the aforesaid Charles Jacomb came before our said
Lord the King in His Chancery, and acknowledged the Specification aforesaid,
and all and everything therein contained and specified, in form above written.
And also the Specification aforesaid was stamped according to the tenor of
the Statute made for that purpose.
Inrolled the Fourteenth day of March, in the year of our Lord One
thousand eight hundred and twenty-six.