IMPROVEMENTS IN ĜAS STOVES
Year: 1870

page_text: LETTERS PATENT to James Morrison, of Glasgow, in the County of
Lanark, North Britain, Outdoor Officer in H. M. Customs, for the
114
Invention of IMPROVEMENTS IN ĜAS STOVES.”
PROVISIONAL SPECIFICATION left by the said James Morrison at
the Office of the Commissioners of Patents, with his Petition, on
the 12th February 1870.
I, JAMES MORRISON, of Glasgow, in the County of Lanark, North
Britain, Outdoor Officer in H. M: Oustoms, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN GAS STOVES," to be
as follows:-
This Invention has for its object to consume the unburnt gases and
smoke, and thereby prevent or reduce to a minimum-the spread-or-
escape into rooms or apartments of noxious vapours from gas stoves, and
this object is effected by providing-the-upper-part-of-tho-stoves with a
sufficient number of ducts or passages into which the unburnt gases and

page_text: smoke pass, and by which they are conducted back into the combustion
chamber of the gas stove. Any solid residue is deposited in the said
ducts or passages, and the combustible mátter collects therein or in a
chamber or receptacle attached to them, and from which the condensed
or deposited matter is withdrawn or allowed to escape.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Morrison in the. Great Seal Patent Office
on the 12th August 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
MORRISON, of Glasgow, in the County of Lanark, North Britain, Outdoor
Officer in H. M. Customs, send greeting.
-
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of February, in- the-year-
of our Lord One thousand eight hundred and seventy, in the 33rd-
year of Her reign, did, for Herself, Her heirs and successors, givo- and
grant unto me, the said James Morrison, Her special license that I,
the said James Morrison, my executors, administrators, and assigns, or
such others as I, the said James Morrison, my executors, administrators,
or-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 Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN GAS STOVES," upon
the condition (amongst others) that I, tho said James Morrison, by an
instrument in writing under my hand and scal, 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 James Morrison, 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 accompanying
:

page_text: Drawings, and to the letters and figures marked thereon, that is to
say:
My said Invention has for its object to consume the unburnt gases
and smoke, and thereby prevent or reduce to a minimum the spread or
escape into rooms or apartments of noxious odours from gas stoves, and
this object is effected by providing the upper parts of the stoves with a
sufficient number of ducts or passages, into which the unburnt gases and
smoke pass, and by which they are conducted back into the combustion
chamber of the gas stove. Any solid residue is deposited in the said
ducts or passages, and the condensible matter collects therein or in a
chamber or receptacle attached to them, and from which the condensed
or deposited matter is withdrawn or allowed to escape.
And in order that my said Invention may be properly understood I
now proceed more particularly to set forth the system, mode, or manner
in or under which the same is or may be used or practically carried into
effect, that is to say :-
Upon the hereunto appended Sheet of Drawings the same letters of
reference denote the same or corresponding parts upon the different
Figures on which they occur.
Figure 1 is a half outside and half sectional elevation, and Figure 2
is a sectional plan upon the line a, a, Figure 1, shewing one modification
of my improved gas stove. This modification consists of a conical
chamber or tube A, which may be made of sheet iron or other material
and is fixed in the manner shown in the interior of an outer shell or
casing B also constructed of sheet iron or other equally suitable material.
This outer casing B has an opening O formed in the top, into which
a T pipe D is screwed or otherwise conveniently fixed; this pipe is
connected at both ends with other ducts or pipes E, E, which by
preference are made tapered and connected at their lower ends with the
reservoir F, which in this example serves the double purpose of an
ornamental stand and may be cast of iron, or fire-clay, or other material..
In the combustion chamber G a ring H of gas pipe is fixed perforated all
round on the upper side, over which a covering I of gauze netting is
placed supported by means of a light frame J resting upon the outside
of the rings H. To the under side of the said ring I a common-gas
pipe K is attached and led through the outer shell of the stove to the

page_text: Having now particularly described the construction of this modifica-
tion of my improved gas stove, its mode of action still further to be
specified will be more casily understood, and is effected in the manner
now about to be set forth. The gas being admitted to the combustion
chamber G through the pipe K, and the ring H, is ignited upon the.
gauze covering I, and any gases that escapo unburnt as well as the
products of those burnt ascend in the conical chamber A, thence into
the T pipe D, and are then conducted downwards through the ducts or
pipes E, E, and discharged into the reservoir F, where they are absorbed
by the water, and in consequence the noxious and escaping odours are
reduced to a minimum. The reservoir F is furnished with a tap or
cock a for the purpose of withdrawing the water when considered
necessary or desired.
Figure 3 is a half outside and half sectional clevation, and Figuro 4 is a
sectional plan, upon the line b, b, Figure 3, shewing a second modification
of my improved gas stove, and as is obvious from a simple comparison
of the Drawings it is to a certain extent similar in construction and_
working to tho herein-before described modification, I will therefor
only specify those parts wherein it differs therefrom. The ducts or
pipes E, E, in place of terminating in the reservoir as in the foregoing
modification are curved at their lower ends at L, L, and conducted
inwards through the outside casing of the stove to the combustion
chamber, where they are forked or formed into two or more branches
which are united to and communicato internally with the ring H.
Under this modification those gases which in the first instance escape
unburnt as well as the burnt products are by means of the curved
branches L, L, conducted back into and mixed with the primary supply
of gas, and provision is made for withdrawing the condensible matter
contained in them by means of small holes b formed in the lower part of
the ducts E, E, through which the condensed matters are discharged
into the reservoir F, which in this example is simply a chamber formed
in the lower part of the stove casing.
Having now described the nature of my said Invention, and the
system, mode, or manner in or under which the same is or may be used
or practically carried into effect, I would observo in conclusion that
what I consider novel and original, and therefore claim as the Invention
secured to me by the herein-before in part recited Letters Patent is, the
arrangement and construction of gas stoves with tubes, pipes, or ducts

page_text: for conveying the unburnt gases and products of combustion escaping
therethrough back to the combustion chamber, substantially as herein-
before described, and two arrangements of which are illustrated on the
appended Sheet of Drawings.
In witness whereof, I, the said James Morrison, have hereunto
set my hand and scal, this Tenth day of August One thousand
eight hundred and seventy.