A NEW OR IMPROVED GAS COOKING AND HEATING APPARATUS OR STOVE
Year: 1872

page_text: LETTERS PATENT to Peter Aitken, of the City of Glasgow, in the
County of Lanark, North Britain, Jeweller, for the Invention of
"A NEW OR IMPROVED GAS COOKING AND HEATING APPARATUS OR STOVE."
Sealed the 1st April 1873, and dated the 7th October 1872.
PROVISIONAL SPECIFICATION left by the said Peter Aitken at the
Office of the Commissioners of Patents, with his Petition, on the
7th October 1872.
I, PETER AITKEN, of the City of Glasgow, in the County of Lanark,
North Britain, Jeweller, do hereby declare the nature of the said Inven-
tion for "A NEW OR IMPROVED GAS COOKING AND HEATING APPARATUS OR STOVE,"
to be as follows, that is to say :—
This Invention has reference to a new or improved construction of the
parts and the arrangement of these generally as a whole, of a gas stove
or stoves for cooking and heating purposes, which stoves, constructed in
accordance with these improvements, are better ventilated, and conse-
quently burn with a steadier flame without smoke, and with less gas in

page_text: proportion to the heat produced, besides being cleaner and more con-
venient than any of the gas stoves heretofore in use.
And the nature of this Invention or the improvements thereof, as
applied to a stove for cooking purposes, consists in constructing and
using it all as follows:-In accordance with one modification or con-
struction and arrangement of the parts, the stove is of a small portable
construction, and of a size and shape suitable for and rather smaller
than the largest size of pot or utensil to be heated over it individually
one at a time; and where much cooking is required they will be used in
sets, ranged and set upon a hearth, dresser, or platform, at a height
suitable for the lifting on and off of the utensils. Thus for general
family cooking purposes each stove is formed preferably with an outer
case of a hollow vertical cylindrical form made of thin sheet metal of
about ten or twelve inches in diameter, and six or eight inches high,
with air slits or recesses round the bottom edge, which may in some
cases have a movable inner or outer ring over them to control the
admission of air to the interior. The air then passing up from within
this large outer case round and up through the lower end of a small
hollow sheet metal cylinder about one-half the diameter of the outer
case, hung by a ring or three or four knee pieces loosely and portably
within an annular horizontal diaphragm, soldered, riveted, or otherwise
secured nearly airtight to, and about two inches or so from the top of
the inside of the outer case. This inner cylinder or case is set centrally
or concentrically to the outer case, so that its lower end is about an inch
or so from the bottom of the platform on which the whole sits by the
outer case, the upper end being about the same distance below the upper
end or edge of the outer case, and also above the close annular diaphragm
between it and the outer case, and which prevents any air escaping
upwards except by and through the lower end of the central cylinder,
within which the large heating gas burner is placed, somewhat in the
form of a large "Argand" burner, within an inch or so of the top. This
burner is made in the form of a ring of small brass or other metal tube,
placed horizontally about an inch or so from the top of the inner
cylinder, with a spray of small holes or jets on its upper face having
a straight tube across its centre, with a row of small jet perforations in
it, also for carrying and supplying the whole with the gas through and
by a central tubular stem secured to a broad solid or heavy base or sole
<<
"

page_text: piece, resting on the platform below the inner or central cylinder, and
having a lateral supply tube secured at one end below and leading into
the hollow stem, the other end being led through one of the air holes at
the bottom of the outer case with a controlling stop cock or tap and
nozzle beyond for attaching the flexible or other connecting or service
pipe from the main gas pipe, which when there is a set or range of
these stoves may run along the side of the whole. This tubular ring and
cross burner is made rather smaller in diameter than the interior of the
inner vessel or cylinder, so that the air passes up between them to supply
the ring of burning jets on the outside, and a sheet metal disc or diaphragm
is secured just below the tubular burner with a narrow slit or ring of
small holes through it, close to the inside of the ring tube and along
both sides of the cross tube to supply air on both sides of the flame and
tube burner. The air being thus supplied close to the burner and jets
within the central close inner cylinder or channel, is heated, and all
lateral motion or draught upon the flame is prevented, and the jet holes
are bored so small and regular in size that even if the gas is turned full
on with its ordinary pressure no smoke is created; and the apparatus
thus heats the pots or utensils, placed and carried over it on two or more
small cross iron rods with grooves in them for taking into recesses on
the upper edges of the outer case of the large vessels, or into holes
through its sides a little nearer the inner cylinder and burner or burning
jets for the small vessels. For the purposes of an ordinary heating stove
for a room or office the outer case might be made ornamental and have
a neat portable dome over it, either formed with interstices or not as
desired, capable of lifting off, so that when desired articles might be
heated, dried, or cooked over it in addition to beating the apartment.
When desired for heating chambers or vessels at some distance from the
stove, undulating ducts or channels might be made in the said top or
dome (made close in this case) for the air to be conducted to or through
such places, and either allowed to escape therein, or only give off the
heat through the conducting pipes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Peter Aitken in the Great Seal Patent Office on
the 1st April 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
AITKEN, of the City of Glasgow, in the County of Lanark, North Britain,
Jeweller, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of October, 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 Peter Aitken, Her special licence that
I, the said Peter Aitken, my executors, administrators, and assigns,
or such others as I, the said Peter Aitken, my executors, adminis-
trators, 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 Channel Islands,
and Isle of Man, an Invention for "A NEW OR IMPROVED GAS COOKING AND
HEATING APPARATUS OR STOVE," upon the condition (amongst others) that I,
the said Peter Aitken, 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 Peter Aitken, 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 in writing, reference being had to the accompanying
Sheet of Drawings, and to the letters and figures marked thereon, that
is to say :-
My said Invention has reference to a new or improved construction
of the parts and the arrangement of these generally as a whole of a gas
stove or stoves for cooking and heating purposes, which stoves, con-
structed in accordance with these improvements, are better ventilated,

page_text: and consequently burn with a steadier flame without smoke, and with
less gas in proportion to the heat produced, besides being cleaner and
more convenient than any of the gas stoves heretofore in use.
And in order that my said Invention and the manner and means of
performing it may be thoroughly understood, I shall now .proceed to
describe the several Figures on the Sheet of Drawings which I have
hereunto appended for the purpose of showing the best modifications
and means I am at present aware of for practically carrying the In-
vention into effect or practice; the same reference letters and numerals.
indicating the same or like parts in all the Figures.
Figures 1 and 2 are respectively a sectional elevation and a plan of
a gas stove A for cooking, also suitable for heating purposes (as for
heating rooms, offices, entrance halls, and other places) when the upper
open hollow hood or top part A¹, shown in Figure 1, is used, the whole
being constructed in accordance with and illustrative of one modification
of my said Invention and improvements, showing one of the most
simple constructions and arrangements of the parts and improvements
as applied to the said purposes, the outer case A, A', being made or
rolled wholly out of sheet metal or sheet iron, tin plate, zinc, brass, or
copper, in a cylindrical form, having the end joints generally soldered,
although for cheap strong stoves made of sheet iron these might be over-
lapped and riveted.
Figures 3 and 4 are a sectional elevation and plan respectively of a
slightly different construction of cooking and heating gas stove to that
shown in Figures 1 and 2, in which the improvements are substantially
the same, but the lower body part is made of cast iron having a portable
sheet metal open crown-shaped ornament A" put on to prevent people's
dresses or other loose articles from catching fire, as shown in Figure 3,
when the stove is used only for heating the air of the apartment where
it is placed; also made cylindrical and for heating one pot or utensil at
a time for boiling or cooking, as in Figures 1 and 2.
Figures 5 and 6 are respectively a plan of the gas burner a, and the
perforated diaphragm or sheet metal disc d for admitting the air
properly to the burner a; but shown as detached from and corre-
5 sponding to those in Figures 3 and 4.

page_text: Figures 7 and 8 are a transverse and a longitudinal section, and
Figure 9, a plan, all corresponding of a gas cooking range or stove
in the form of a rectangular box A with their heating burners a,
and their chambers B¹ in the top plate B suitable for heating or
boiling three cooking utensils at a time, and supporting and keeping
others warm on the plate B between these heating holes B¹, all con-
structed in accordance with and illustrative of my Invention and its
improvements as applied thereto. Figures 10 and 11 being respectively
a plan of one of the burners a, and its diaphragm d for admitting the air
thereto, both shown as detached from and corresponding to that shown
in Figures 7, 8, and 9.
Referring to Figures 1, 2, and 3, 4, these show two slightly different
modifications or construction and arrangement of the parts, as small
portable cooking stoves also suitable for heating, of a size and cylindrical
shape rather smaller than the largest size of pot or utensil to be heated
over it individually, one at a time, and where much cooking is required
these may be ranged or formed in sets, as in Figures 7, 8, and 9; in
either case placed upon a hearth, dresser, or platform at a suitable
height for the lifting on and off of the utensils.
Thus then the nature of my said Invention or the improvements
and mode of performing the same as applied to the stoves for general
family cooking purposes shown in Figures 1 to 6, consist all as follows:-
Each stove is formed with an outer case A, preferably of a hollow
vertical cylindrical form with a close supporting top B, and either made
of thin sheet metal, Figures 1 and 2, or of cast-iron, Figures 3 and 4,
usually of sizes from nine to fourteen inches in diameter, and five to
eight inches in depth, with holes or slits A formed through the outer
supporting shell A round, near, or at the bottom edge, which might in
some cases have a movable inner or outer ring as a movable door over
them to control the admission of air to the interior when desired. The
air admitted through these openings A¹¹¹ passes from the space A³ within
the large outer case A all round equally under the lower end of and up
the small hollow cylindrical sheet metal air conductor b, about one half
the diameter of the outer case, hung by a rim, ring, or three or four knee
pieces at the edge of the round hole B¹ formed centrally through the
carrying or supporting top B of the close case A, so as to carry the air
conductor 6 in a loose portable manner for easy removal from and

page_text: -
insertion within the top B shown in Figures 1 and 2, secured nearly air-
tight to, and about two inches or so from the top of the inside of the
outer case A. The inner case or air conductor or heater is set con-
centrically to the outer case A, and with its lower open end about an
inch or so above the bottom of the latter or platform, as z - - z, on which
the whole sits, the upper edge or end in Figures 1 and 2 being some
little distance below the upper end or edge of the outer case A, and also
above the close annular end or diaphragm supporting it to the outer case,
so that none of the air entering the stove can escape except up through
the lower open end of the central air conductor or cylinder b, within
which the large heating gas burner a is placed (somewhat in the form of
a large improved "Argand" burner) within an inch or so of the top of
the conductor 6, and with an air heating and conducting diaphragm d
close below it.
->
The burner a, in Figures 1 and 2, is made in the form of a ring of
small brass or other metal tube, placed horizontally about an inch or
so from the top of the inner air conducting cylinder b, with a spray of
small holes or jets a* on its upper face, having a straight tube a¹ across
its centre with a row of small jet perforations in it also, which carries
the burner a and supplies the whole of the jets or holes with gas,
through and by the central tubular stem a¹¹, secured to the broad heavy
base or sole piece a¹¹¹ resting on the platform z z, below and in the
centre of the conductor or cylinder b. The lateral supply tube a² is
secured into the socket at of the hollow sole a¹¹¹ and stem a¹¹, its other
free end a passes out through a hole near the bottom of the outer
case A, so as to have the india-rubber, elastic, or other supply pipe a³
attached to its outer end, either with a controlling stop cock or tap c
on this nozzle, or it might be beyond it near the main service pipe,
where the other end of the flexible or other connecting pipe a³ is
connected to the main service or supply gas pipe, which, when there
is a set or range of these stoves, may run along the side of the whole,
and have a flexible conducting pipe a³ leading to each with the cocks c,
all placed near the supply pipe or branch, as seen in Figures 7, 8,
and 9.
The tubular ring a, or outer one when there is more than one'
(Figures 9 and 10), with its cross burner' a¹ is made rather smaller in
diameter than the interior of the conductor b, so that the air can pass

page_text: up freely between them at d³, to supply the ring of burning jets on the
outside ring, while the sheet metal disc or diaphragm d is secured just
below the said tubular burner a by a spring collar d to the stem a",
or other equivalent means, with narrow slits or rings of small holes d"
through it close to the inside of the ring tube, or both sides of the inner
ring or coil of pipe forming the burner, when there are several rings or
coils, as seen in Figures 5 and 10, and their respective diaphragms d,
at Figures 6 and 11, and also along both sides of the cross tube a¹ to
admit air on both sides of the cross tube a, to supply it on both sides
of the flame and tube burner a at all parts, close to the burner and jets
from the lower part 6' of the conductor b, where the air is heated and
steadied to prevent all lateral motion or draught upon the entering air,
or the flame in the combustion space 6" above the heating perforated
plate d, while the jet holes are bored so small and regular in size that
even if the gas is turned full on with its ordinary pressure the flames or
jets make no smoke, and are not to be more than an inch in length,
so that the apparatus or stove so constructed heats the pots or utensils
placed and carried over it on either two or more small cross iron rods Bu
with grooves in them for taking into holes or recesses in the upper
edges of the outer case A, Figures 1 and 2, or upon the ribs B™ cast
on the top B, in Figures 4 and 7 to 9, all so that the bottom of the
vessel to be heated will be about an inch and a half or so above the
burner, or so that the flames or jets will not touch it, and sufficiently
above the top of the conductor 6 at B¹ to allow of the free ventilation
and escape of the heated products of combustion.
For boiling or cooking in boilers and vessels larger than the outer
case A, as that shown at Z, Figure 12, it is preferred to make them with
an annular rim C on their bottom, to fit into the top of the case A,
Figure 1, and rest on the top B, but as much deeper that the segmental
recesses C¹ can be cut out of it close to the bottom of the vessel, and
above the outer case A, sufficiently large to allow of the said ventilation
and escape of the gaseous products of combustion, and to suit the size of
burner a and vessel Z being heated.
In the modification shown in Figures 3 and 4 and 6, 7, and 8, the
vessels simply sit on the ribs B1, which are of such a height off the
top B as to allow of this ventilation above the top end B¹ of the.
conductor 6; and in these Figures the interstices d³, d", in the air

page_text: directing and heating discs d are shown black, but in the detached
detailed views of these Figures 6 and 11, they are shown as open and
cut out.
For the purposes of an ordinary heating stove for a room or office, the
outer case might be made ornamental above as A³, or A", in the form
of a neat portable hollow cover dome, or open crown capable of lifting
off, either formed with interstices or not as desired, according as the
heated products of combustion are desired to be let into the room, or
conducted away by a pipe for the purpose to the chimney or otherwise,
and so that when desired articles may be heated, dried, or cooked over it,
in addition to heating the apartment by the mere temporary removal of
these tops A', A".
When only desired for heating chambers or vessels at some distance
from the stove, undulating ducts or channels might be made in the said
top or dome (made close in this case) for the air to be conducted to and
through pipes for heating, such rooms or chambers to be heated by
radiation through these conducting pipes; or instead of this the heated
air could be allowed to escape direct into the rooms, either along with
the products of combustion or not according as desired, and the
O ventilation is arranged to keep these and the heated and heating air
separate in the stove.
In applying my said improvements to baking or the heating of close
baking ovens, these ovens may either be set over the improved gas
stoves A such as described, or have such burners a, and their air con-
5 ductors b, and perforated plates d, fitted in ventilated recesses formed
below such ovens, when these are permanent or built in ovens (and not
made portable to be placed over such stoves) so as to heat them instead
of the usual coal or charcoal fires placed below them; or otherwise, such
ovens might be heated in their inside by making small portable simple
0 heaters D, constructed in accordance with these my improvements, as
shown in sectional elevation and plan in Figures 12 and 13, in which
the outer case D is made to serve as the air conductor and outer
supporting case A of the former modifications to suit the size and form
of burner a, and of a depth to rest on the floor, or a shelf of the oven
-z, and continued some little distance above the burner a, to
steady the jet flames with the air heating and ventilating combustion
chambers b¹, 6", having the air inlet slits D' formed in the lower resting
5 as z
-->

page_text: edge of the case D, and the outlet ventilating slits D" at top, below and
above the diaphragm d respectively.
The stem a", stand a¹¹¹, and gas supplying branch pipe a² are other-
wise the same as described in reference to Figures 1 to 4, so that when
this improved simple gas heater or stove D is placed in an oven to heat
it, either the pipe a³ or the supply pipe as coupled to it, would require to
pass through a hole in the side of the oven made for it, and a ventilating
hole or holes would require to be formed near the top of the oven to
allow of the escape of the products of combustion from the new gas
heater, or the usual ventilator employed for letting off the moisture from
the article being baked might be made to answer for the said purpose of
ventilating the heater also.
This simple form of my improved construction of gas stoves or
heaters, Figures 12 and 13, may also be used as a portable heater for
many purposes instead of and where spirit lamps have heretofore been
used, as in laboratories for boiling, distilling, and other purposes in
practical and experimental chemistry, and for warming water and
preparing coffee for domestic use, and also for hotels and other places of
refreshment; or for being arranged in the lower part of ordinary designs
of ornamental and other stoves, or open grates for heating the apartments
where desired and so used, and where they could be wholly or partially
concealed from view by ornamental designs in metal, porcelain, or other
material desired.
Although the burners a in these modifications and adaptations of my
improvements, Figures 1 to 13 have been shown and described in the
form of single and double rings and scrolls in a flat plane, with flat
perforated air-conducting disc d (with chambers b to correspond), it is to
be understood that these may be modified with more rings, or in a
rectangular or other form, and be curved or lie in different planes and be
of any size to suit the shape and size of the vessel or object to be heated,
or be made in the form of straight tubes a, as shown in Figures 14 to 20
of the Sheet of Drawings, and yet to be described. These Figures
severally represent an improved gas stove shown in transverse vertical
section and plan Figures 14 and 15 respectively for heating two common
smoothing irons I at a time for dressing. clothes; and Figures 16 and 17
are corresponding views of a like stove for heating two tailor's pressing
irons or "
geese" G at a time, or it might be four by laying other two on

page_text: the top of these shown, while Figures 18 and 19 are a longitudinal and a
transverse vertical section, and Figure 20 a plan respectively of a like
improved gas stove for heating from one to six soldering bolts at a time;
all these stoves being constructed in accordance with and further illus-
trative of my said improvements as applied to these and like purposes.
Referring to Figures 14 and 15, the outer case D is made rectangular
of sheet iron, having the top B made in the form of a cast-iron `plate
resting loosely on the upper edges, with steadying snugs inside, of a size
and divided off by the angular strips B₁ to suit and receive two irons
over the perforations B¹ closely formed through the plate B below the
face or sole of the irons I, which rest on three short pins B¹¹¹ (but it
might be cross bars, as seen in Figures 3, 4, and 7, 8, and 9) of a
sufficient height only to cause the heated products to impinge on the
face of the irons I in passing out through the holes from the combustion
chamber 6", and allow of their free lateral ventilation and escape all
round the edges of the irons. In this modification the burner is formed
by two straight tubes a, a, passed along through the outer case D, so as
to be carried in holes in its ends D³, both being joined by the end cross
pipe a¹ and supply branch a², with a stop cock c. These burners a have
one or more rows of very fine holes bored along the upper sides, and
have their air, heating, and directing plate d fixed close below it by
flanges to the sides, with their two rows of holes or slits d¹ along each
side of the pipes a (or it might be one wider row in the centre below
the pipe or burner) in either case so as to admit and direct a nearly
equal supply of air from the inlet air heating chamber 6' below the
plate d on each side of the burners a, so as to supply the jets of flame
equally, and thus prevent all unsteadiness of the flames in the combus-
tion chamber ", which in this and the following heating stoves Figures
14 to 20, are preferred to be deeper than in the former applications,
Figures 1 to 13, or nearly as deep as the air, inlet, and heating chamber
or division 6¹ below the plate d, and into which the air is admitted by a
set of narrow slits D¹ at the bottom edge of the outer case D, and the
arrows in this, as in all the Figures on the Sheet of Drawings, show the
course of the air in entering and passing through the stove to the
burners, and the outlet ventilation and current of the heated products of
combustion from them, and imparting their heat to the irons as the
current passes across their face.

page_text: In this arrangement and application shown in Figures 16 and 17, there
is no plate or top on the upper combustion chamber 6", and it is divided
by the longitudinal vertical plate E into two chambers 6", each about
the size of an iron or 66
goose" G when laid on its side upon two
supporting cross bars or rods B", over and with one long tubular
burner a to each, controlled by stop cocks c, c, so that in this case one
can be shut off without the other; the air enters the lower chamber 61
by the holes. D¹ in the side of the case D, and passes up the slits d", d",
in the directing and heating plate d on each side of the tubular
burners a, a, from which the heated gaseous products of combustion
from the gas flame pass up, and in impinging on the sides of the irons,
and gliding off laterally impart their heat to the iron, and escape with
sufficient ventilation up the sides of the irons which do not quite fill the
chambers 6,6"; three rows of holes and jets are shown on the upper
side of the burners a, a, in this case.
Referring to Figures 18, 19, and 20, the outer rectangular shell D is
divided by two transverse divisions or ends D' from bottom to top, and
the two upper divisions at each end into two sets of three heating
combustion chambers 6" by the longitudinal plates E, and a heating
horizontal directing plate d, and lower air entering and heating
chamber 6' common to the whole three combustion chambers 6" on each
side, which however, have a straight tubular burner a to each, with two
or three rows of small holes and flame jets on the top of each, and with
admitting air slits d" on each side of the burner a, carried in holes in
the end plates D³, D³, and all joined by a cross pipe a¹ at each end with
a stop cock c to each. A transverse bar or rod B" is passed through or
across the centre of the whole set of heating combustion chambers 6",
so that the soldering bolts Z' rest on these, while the stems or shanks
near the handles rest in recesses cut for them in the upper edges of the
ends D of the outer case D, as seen on the right hand side of Figures 18
and 20, where the set of three soldering bolts Z' are shown in position as
being heated, while those on the other side are removed to show the
burners a and chamber 6" more clearly; the waste gases are ventilated,
and get freely off after heating the bolts Z' up the space between them
and the sides of their heating chambers 6".
To prevent the escape of too much heat and keep the bolts hot,

page_text: indicate this more clearly one is shown up and the other down in Figures
18 and 19. This heating stove can be placed on the centre of a plumber's,
tin smith's, or zinc plate worker's bench, and two or four men be supplied
with hot bolts without moving from their benchi.
These arrangements of straight tubular burners are also applicable for
a great many other heating purposes, as for small furnaces for steam
boilers and other manufacturing purposes, besides those shown, all to be
applied in an equivalent manner, with these improved burners a, and
perforated and air-conducting plate d, and heating air chamber b', and
combustion chamber 6" for giving a steady or regular supply and
current of the air, and a steady flame and ventilation in the combustion
chamber.
In these latter modifications, Figures 12 to 20, the stoves ought to be
set on iron plates or other equivalents z, which would not char or be
liable to take fire; but the other stoves, Figures 1 to 9, can be set on
wood benches or floors, without fear or danger of fire.
Having thus particularly described my said Invention, and the manner
in which the same is or may be used or carried into effect, I may observe
in conclusion that I do not confine or restrict myself to the precise details,
arrangements, or adaptations which I have had occasion to describe,
delineate, or refer to, as many variations of and from these may be made
without departing from the main or essential features of my said
Invention, neither on the other hand do I claim the forms and con-
structions of many of the parts of the gas stoves or their modes of
attachment (which I had occasion to name and refer to) by them-
selves specially, as some of these may have been used heretofore, except
in so far as these have essential reference to or form part of my said
improvements or Invention, but 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,—
First. The construction and arrangement of the parts of the several
modifications and adaptations of improved gas stoves, all substantially in
the new or improved manner, and for the respective purposes herein
described and shown in the accompanying Drawings.
Second. The construction, arrangement, and use of gas burners for
gas stoves within air conducting channels or chambers (b, D,) with

page_text: perforated discs (d) dividing these channels into an air steadying and
heating chamber (6¹) below, and a flame steadying, ventilating, combus-
tion chamber (61) above it, all substantially in the new or improved
manner herein described and shown in the accompanying Drawings.
Third. The construction and use of an air conductor or channel (6)
for the burners of gas stoves, substantially as herein described and shown
in the accompanying Drawings.
Fourth. The construction and use of a perforated disc fixed closely up
to and for admitting the air in a heated and steady manner equally on
each side of the tubular jet burners of gas stoves, all substantially in the 1
new or improved manner and for the purposes herein described and
shown in the accompanying Drawings.
In witness whereof, I, the said Peter Aitken, have hereunto set
my hand and seal, this Twenty-eighth day of March, in the year
of our Lord One thousand eight hundred and seventy-three.
1
Witness,
JOHN THOMSON,
Patent Agent,
62, Buchanan Street,
Glasgow.
PETER AITKEN. (L.S.)