Improvements in and relating to the Chimneys of Oil and Gas Stoves used for Heating and Cooking..
Year: 1893

page_text: Date of Application, 13th Feb., 1893
Complete Specification Left, 13th Nov., 1893-Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Chimneys of Oil and Gas Stoves
used for Heating and Cooking..
We, JOHN HARPER AND COMPANY, LIMITED, of Albion Works, Willenhall
in the County of Stafford, Ironfounders, and CHARLES RETALLACK, of the same
address, Works Manager of the said Company, do hereby declare the nature of this
invention to be as follows:-
This invention has for its object to construct the chimneys of oil and gas stoves
in such manner that the same may be readily produced in a great variety of
design; may be readily taken to pieces for being thoroughly cleaned, and be as
readily put together again; and separate flues be provided in a single chimney for
the different burners, when more than one burner is used in a stove.
According to this invention, the chimneys are made of plates which are, pre-
ferably, of cast iron or other cast metal. The vertical edges of these plates are
fitted to interlock with one another, and the bottom edges of the plates are fitted
to interlock with the gallery by which the chimney is carried and the dome plate
which is also carried by the gallery. The top plate is formed with a downward
flange or rim which embraces the top edges of the chimney plates and prevents
them from moving outwards, and the interlocking of the vertical edges prevents
them moving inwards. The top plate is firmly held down, so as to hold the chimney
plates between itself and the gallery, by means of a bolt passed through itself and
the gallery and securely tightened at the top by means of a thumb-screw which is,
preferably, let into a recess in the top plate; and by unfastening the thumb-screw
the top may be removed and the chimney plates taken apart.
If two or more burners are arranged in the same stove, a single chimney is used
and each burner is divided off from the next adjacent to it by means of a vertical
plate which extends from the dome plate to the top plate; and when such division
plate, or more than one such plate, is used screws by which the top plate is held
down in place may be fixed on the top and bottom, respectively, of the division
plate, or each such plate, for connection with the top plate and gallery respectively,
the screws being provided with thumb-nuts for convenience in unfastening and
fastening up again.
The plates may obviously be ornamented with any desired pattern. They may
also be enamelled, and are then cleaned with the utmost convenience and efficiency
when taken apart in the manner described.
A shape which is usually convenient for the chimney, especially when two or
more burners are used in one stove, is a rectangular shape with rounded corners;
and in such case four vertical plates are used, according to a convenient application
of the invention, of which two opposite plates, which we term for convenience the
side plates, are formed each along the bottom with a tongue which passes down
inside the rim of the gallery and with lugs which rest on the top edge of the
gallery, and each of such plates is formed with a rebate in the outer face along
each vertical edge, the rebate being conveniently formed by the projection of a
tongue from the inner face of the plate. The bottoms of these plates are
prevented from moving outwards by the rim of the gallery, and from moving
inwards by lugs cast upon the dome plate. The upper ends of these plates corre-
spond with or are formed similarly to the lower ends. The remaining two plates,
which we term for convenience the end plates, are formed with curved vertical
edges which form the rounded corners of the chimney; and these edges fit into
the rebates along the vertical edges of the side plates. The end plates have lugs
projecting from their inner faces on each side, and these lugs prevent the side

page_text: plates from falling inwards, while the edges fitting as described in the rebates of
the side plates prevent the side plates from falling outwards. The end plates are
formed at top and bottom in the corresponding manner in which the side plates are
formed at such parts. The end and side plates and gallery are locked firmly in
place together and with the top plate, by passing the downward rim of the top
plate outside the top of the chimney plates and fastening the top plate in place as
described. The chimney may, of course, be formed of other shapes beside the
rectangular shape described, the parts being put together in the same or analogous
manner.
Dated this 11th day of February 1802
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in and relating to the Chimneys of Oil and Gas Stoves
used for Heating and Cooking.
We, JOHN HARPER AND COMPANY, LIMITED, of Albion Works, Willenhall
in the County of Stafford, Ironfounders, and CHARLES RETALLACK, of the same
address, Works Manager of the said Company, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention has for its object to construct the chimneys of oil and gas stoves
in such manner that the same may be readily produced in a great variety of design ;
may be readily taken to pieces for being thoroughly cleaned, and be as readily put
together again; and, when such is required, separate flues be provided in a single
chimney for the different burners, when more than one burner is used in a stove.
According to this invention, the chimneys are made of plates which are,
preferably, of cast iron or other cast metal. The sides of these plates are fitted
to interlock or engage with one another; and the bottom edges of the plates are
fitted to engage with, and be retained from moving outwards by, the gallery by
which the chimney is carried, and such edges are preferably interlocked with the
gallery and dome-plate. The top-plate is formed to engage with the top edges of
the chimney plates and prevent them moving outwards, and the interlocking or
engagement of their sides prevents the chimney plates moving inwards. The top-
plate and gallery are securely fixed in place by means of nuts screwed up on pin-
ends which pass through the top-plate and gallery, and the nuts are, preferably,
formed as thumb-screws. By first unscrewing the thumb-screws the top-plate may
be removed and the chimney plates then taken apart.
In order that the invention may be clearly understood, we will now proceed to
describe it with reference to Figures 1 and 2 of the accompanying drawings,
which illustrate its application, by way of example, to the case of a store having
two burners and a chimney of a rectangular shape with rounded corners (which is
usually a convenient shape for the chimney of a heating or cooking stove) and a
separate flue for each burner.
Figure 1 is a vertical section through the centre of the portion of a stove which
comprises the gallery and parts supported thereby; and Figure 2 is a sectional
plan of such portion taken on the irregular line xx of Figure 1.
A is the gallery, having the usual legs a a etc. by which, when used as an oil
lamp for which the parts are specially designed, it rests upon the oil reservoir; B is
the dome-plate, having two domes bb, namely one for each burner; CC are two
of the chimney plates, which we term fcr convenience the "side plates "; DD are
the remaining two chimney plates, which we term for convenience the "end
plates" and E is the top-plate. The side plates C C and end plates D D are
formed each with a tongue c along the bottom, and with a corresponding tongue d
along the top. The tongues c pass immediately inside the rim e of the gallery, and

page_text: the plates are supported upon the rim e by shoulders formed at the bottom of the
plates (by the projection of the tongues c) and by lugs formed to project outwards
from the plates. These plates are prevented from moving inwards at the bottom
by means of lugs g g etc. standing up at intervals around the edge of the dome-
plate B. These lugs, though preferred, are not essential, as the interlocking or
engagement of the side edges of the plates will prevent them moving inwards when
the plates are all put together. The use of the lugs, however, tends to keep the
parts in place while others are being added. The plates CC and D D preferably
slant somewhat inwards towards the top for the sake of appearance, but for
convenience of description we will assume them to be vertical. The vertical
edges of the side plates CC are rebated, which is conveniently accomplished by
forming them with tongues hh etc. which project from the inner faces of the plates.
The end plates DD are shewn to be formed with curved sides ii etc. which form
the rounded corners of the chimney, and the edges fit into the rebates along the
vertical edges of the side plates CC. The end plates D D have lugs kkete.
projecting from their inner faces in position to come immediately behind the
tongues of the side plates, and these lugs prevent the side plates CC from falling
inwards, while the edges of the end plates DD fitting in the rebates of the side
plates, as shewn, prevent the end plates from falling inwards. The tongues serve
also to cover the vertical joints and prevent the light shining through them. The
top-plate E is formed with a downward rim or flange which is passed over and fits
around the tongues d at the top of the plates CC, DD; and the edge of such rim
rests upon shoulders and lugs of the plates which correspond to the shoulders and
the lugs at the bottom of the plates. The rim securely prevents the chimney
plates CC from falling outwards. The chimney is divided into two flues by the
central diaphragm or plate F, which is utilized to securely connect the top-plate,
gallery and dome plate, together and thus completely fix in their relative positions
all the parts of the structure. The diaphragm F has a stud m projecting upwards
from a boss at the top, and a stud » projecting downwards from a corresponding
boss at the bottom. The stud m passes up through the top-plate E, and the stud n
passes down through the dome-plate B and gallery A, and each stud is provided
with a fly-nut, as shewn. To avoid unnecessary projection at the upper surface of
the top-plate, the fly-nut is sunk in a recess o formed therefor in the plate. The
diaphragm F has dowels pp which enter within holes formed to receive them in
the dome-plate B, and thus the diaphragm is maintained in position at right-angles
to the end plates DD. If the fly-nut is unscrewed from the stud m, the top-plate E
may be removed from the chimney plates, and the chimney plates may then be
removed from the gallery; and if the fly-nut is unscrewed from the stud n, the
dome-plate B may be removed from the gallery. The studs m n may be fixed in
their respective bosses by casting the metal of the bosses around them in the
process of casting the diaphragm F.
In lieu of forming rebates along the vertical edges of the side plates C C to
receive the vertical edges of the end plates D D, the rebates may of course be
formed along the vertical edges of the end plates and the lugs & be dispensed
with. This arrangement, however, is not recommended as it involves liability
of the side plates falling outwards when set up ready to receive the top-plate,
whereas they are securely prevented from doing so when their own vertical edges
are rebated. The shape of the end plates renders them not liable to fall outwards
when set up to receive the top-plate.
A chimney may, of course, be formed of other shapes besides the shape illus-
trated, such for instance as hexagonal or circular, the whole being made up of
separate plates rebated together at the edges and the rebated plates prevented
from falling inwards by means of lugs projecting from the other plates, the set of
plates being held in place top and bottom in the manner described with reference
to the plates of a rectangular chimney.
The chimney plates may obviously be ornamented with any desired pattern or
design. In the illustrations, a Gothic window opening is formed in each plate, and

page_text: and
a frame G is screwed on outside. Each frame is formed with an inward rim
the outer margin of each window opening C is rebated, and a piece of glass H is
carried between the face of the rebate and the inner face of the frame. The
chimney plates may be enamelled, and can then be cleaned with the utinost
convenience and efficiency when taken apart in the manner described.
Figure 3 is a vertical section through one side of an apparatus corresponding to
that shewn by Figures 1 and 2, shewing a convenient method of securely con-
necting the top-plate E and gallery A together in the case of a chimney for a
single burner, or of a chimney for two or more burners but not divided into
separate flues. The section is taken through the centre of one of the side
plates C. The top-plate is fastened down to the top of each side-plate_C_by
means of a fly-nut on a stud m which projects from a boss on the plate C, just
as the stud m previously described projects from a boss of the diaphragm F.
The fly-nut in this case also is, preferably, within a recess o formed in the top-
plate. The bottom of each side plate C is fixed to the dome-plate B and gallery A
by means of a stud n projecting from a sideway boss or lug of the side-plate,
and passing down through both the dome-plate and gallery and fitted with a
fly-nut.
In the modifications above described, the top-plates may, of course, be connected
with the galleries by means of long bolts passing down inside the chimneys, in lieu
of the studs m n.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A chimney for an oil or gas stove, used for heating or cooking, formed of a
number of vertical (or approximately vertical) plates interlocked or engaged with
one another along their sides and securely but removably fixed to the top-plate
and gallery, substantially as described.
2. A chimney for an oil or gas stove, used for heating or cooking, formed of a
number of vertical (or approximately vertical) plates interlocked or engaged with
one another along their sides and held within the rim of the gallery and within a
rim of the top-plate, and the top-plate securely but removably connected with the
gallery, substantially as described.
3. The combination of vertical (or approximately vertical) chimney plates,
gallery and top-plate, constructed fitted and fixed together substantially as described
and shewn (according to two modifications) by the drawings herewith.
4. In an oil or gas stove used for heating or cooking and provided with two or
more burners, the combination with vertical (or approximately vertical) chimney
plates and top-plate and gallery constructed and fitted together substantially as
described, of a diaphragm or diaphragmns, such as F, dividing the chimney into two
or more flues, substantially as described.
Dated this 11th day of November 1893.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicants.