An Improvement in Stoves and Cooking Ranges.
Year: 1889

page_text: Date of Application, 8th June, 1889
Complete Specification Left, 18th June, 1889-Accepted, 20th July, 1889
PROVISIONAL SPECIFICATION.
An Improvement in Stoves and Cooking Ranges.
We, DERMONT CAMPBELL, Ironfounder, and ROBERT GALLOWAY, pattern maker,
both of Torwood Foundry Larbert, County of Stirling, North Britain, do hereby
declare the nature of this invention to be as follows:—
This invention relates to Stoves and Cooking Ranges, and has for its object to
adapt them for use with an open top to the fire or a closed one, alternately, as
required.
In carrying out our invention we combine with our said Stoves and Cooking
Ranges, appliances which are commonly designated, "convertible flues"-the con-
struction of which is as follows:-
:-
Within, to, or in connection with the principal back flue of the Stove or Cooking
Range (whether the said back fiue is built of brickwork, or masonry in the wall or
constructed of metal and fixed upon the hob) we provide a port hole which is in line
with the back of the fire, and in, or near to, this opening we fix upon the stove or
range a metal framework resembling in form the framework of an ordinary door, and
consisting, chiefly, of two upright jambs united at the top with a lintel.
This said framework contains suitable sockets, near the lintel, for supporting a
swinging metal shutter of suitable size for closing the doorway or opening made by
the said framework.
Over the whole of this said framework and suspended door we fit a rectangular
metal Hood, or cover, which consists of three members only, viz. two upright side
walls (right and left) and a roof plate; the roof plate occupying and framing the front
part only of the hood.
This hood is larger than the skeleton frame which supports the above named
suspended (and swinging) door, but smaller than the port hole or aperture leading
into the chimney or back flue, so that the hood may be moved in and out of the said
flue in a backward or forward direction as required.
We provide pins, flanges or suitable projections within the hood (upon the inside
walls thereof) for the purpose of engaging with the suspended, swinging shutter which
is supported only by pivot projections resting in the before named sockets upon the
skeleton frame.
When the Hood is drawn forward from the back. flue, or chimney the said projections
upon the inside walls thereof engage with the swinging shutter and cause it to rise
into a horizontal position and complete the (roof plate of the) hood by covering the
hinder part thereof.
If the hood is thus drawn forward and the swinging shutter raised into a horizontal
position as described, the front part of the hood is open and available as flue to carry
off the products of combustion whenever the fire cover is removed. The fire cover
being removed in any way which is most convenient, the Stove or Range is then
In the form known as $6 an open fire Range" (or stove).
This arrangement may be reversed by putting the cover upon the fire and pushing
back the hood into the chimney, when the swinging shutter again assumes a vertical
position and closes the port hole.
As there is no permanent roof plate to the hinder part of the hood, and the side
valls thereof project backward beyond the permanent roof plate, there is always a
ree passage at the back part thereof for the products of combustion to ascend into the
himney from the flues beneath the Boiler or oven.
Dated this 7th day of June 1889

page_text: COMPLETE SPECIFICATION.
An Improvement in Stoves and Cooking Ranges.
We DERMONT CAMPBELL, Ironfounder, and ROBERT GALLOWAY, pattern maker,
both of Torwood Foundry, Larbert, County of Stirling, North Britain, 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 relates to Stoves and Cooking Ranges, and has for its object to
adapt them for use with an open top to the fire or a closed one, alternately, as required.
In carrying out our invention we combine with our said stoves and cooking ranges,
appliances which are commonly designated "convertible flues" the construction, form
and operation of which are illustrated in the drawings which accompany this specifica-
tion, in which,
Fig. 1. is an external view in perspective shewing our improved convertible flue
mechanism when applied to a metal chimney and closed.
Fig. 2. is an external view in perspective shewing our improved convertible flue
mechanism when applied to a metal chimney and open.
Figs. 3 & 4. are front & back views in perspective of the "hood" which forms part
of our improved convertible fluc mechanism.
Figs. 5. 6 & 7. are views in perspective of the skeleton frame and swinging
shutter (shewn separately and in combination)-which form parts of our improved
convertible flue mechanism.
Figs. 8. 9 and 10. are views in sectional elevation shewing the relative positions of
our improved convertible flue mechanism when open and closed.
Fig. 11 is a view in perspective of a metal chimney placed upon the hob of a range.
In carrying out our invention in connection with a stove or cooking range which
is furnished with a metal chimney similar to that marked R and shewn in
Figs. 1. 2. 7 & 11 of the drawings herewith fitted upon the hob we place the said
chimney above a flue aperture marked A figs. 5 & 11 and provide it with a
rectangular (or other shaped) port hole B. At the entrance to the said port hole
we fix a skeleton frame C, Fig. 5, for the purpose of supporting a swinging shutter
(D. Fig. 6) as shewn in Fig. 7. The rectangular hood E (Figs. 2. 3. 4. 8. 9 & 10)
is adjusted over the door D and its frame, suitably for its insertion and travel within
the aperture B.
Upon the inside walls of the hood E we provide projections, marked F
(figs. 3. 4. 8. 9 & 10) for the purpose of raising and otherwise actuating the
shutter D and the sides of the skeleton frame C are shaped suitably for allowing free
passage for the said inside projections as shewn by the rabbits marked G Fig. 5, as
the hood is moved in and out of the chimney or back flue.
We provide flanges (marked H fig. 7) upon the hob of the range and attach the
metal chimney to them and make use of them as guides to control the hood E and
keep it from swerving to the right or left as it is moved in or out of the flue.
In fig. 3 we have shewn the rectangular hood E with a framed aperture J and in
fig. 4, how a similar roofless space may be obtained by making the side walls K to
project beyond the roof plate L.
Upon the hinder part of the hood E we provide suitable projections marked M
and shewn in Figs. 3. 4. 8. 9 & 10. to prevent the hood being accidentally with-
drawn from the chimney R.
When our convertible flue as above described is fitted together upon the hob of a
cooking range as shewn in Fig. 1 the apparatus may be wrought as a close fire range
as the apertures A and J afford an ample escapement for the products of combustion
to proceed into the chimney or back flue, after they have circulated through the
oven and boiler flues.
In operating our convertible flue mechanism above described the hood E (as

page_text: shown in Fig. 1) may be drawn forward (see Fig. 2) by aid of the knobs, N or the
staple P (Figs. 1, 3 & 4) and as it is pulled out from the back flue the flanges F (or
their equivalents) press against the back of the swinging shutter D and cause it to
move on its axis (see Fig. 9.) until it assumes the horizontal position shewn in
Fig. 10. when the convertible flue is fully open. The fire cover being pushed or
otherwise removed from over the fire the products of combustion obtain direct access
into the chimney through the flue formed by the hood and its associate mechanism.
In order to restore the apparatus to its close fire form-the cover is again placed
over the fire and the hood E is pushed into the back flue and in its progress backward
the swinging flap or shutter D is released from restraint and allowed to assume the
pendant position shewn in Fig. 1 when the apparatus is again adapted for close fire
purposes.
In the foregoing description we have confined our remarks to the rectangular form
of hood shewn in the drawings but our invention is not necessarily confined to this
shape but may be made of an arched, polysided or other form convenient for the
purposes for which it is designed.
The suspended swinging shutter D fulfils two important requirements in connection
with our convertible flue: it completely closes the front opening of the hood when
the latter is pushed into the back flue and when the hood is drawn forward the inside
flanges F (or their equivalents) cause the said shutter to assume automatically, a
horizontal position beneath the roofless, hinder portion only, of the hood and thus in
turn closes the aperture J.
We are aware that numerous convertible flue arrangements in combination with
stoves and cooking ranges are made with rectangular and other shared hoods for flue
purposes and that some of these have apertures in the roof plates thereof or roofless
portions at the hinder part of them which are opened when the hood is pushed into
the back flue and closed automatically, when it is drawn out therefrom so that it will
be understood that we do not claim such a construction of hood as our invention
except it be in combination with a swinging shutter suspended within and beneath it
such as that marked D in the accompanying drawings-The skeleton frame C (or its
equivalent) may be fixed in any convenient place about the range and not necessarily
to the hob as shewn in the annexed drawings. It may, for instance, be attached to
or near the back inside wall of the chimney or consist of one or
more davits
protruding forward from the back part of the range within the precincts of the
chimney.
We are aware also that various kinds of open and close fire mechanism, each
consisting of a convertible flue, exists wherein doors or shutters are combined and
enclosed within the hood for covering the front apertures thereof none of which
are suspended from the top after the manner described and shewn herein. We
are further aware that doors for closing flue apertures (and other purposes) are
attached to coveplates, skirtings metal chimneys and such like parts of stoves and
ranges and suspended therefrom in front of the said apertures by means of hinges
or equivalent mechanism such doors being outside of and above other mechanism
which forms part of the convertible flue; such hinged doors are not enclosed
within a travelling hood or convertible flue although they are suspended from
above the said apertures.
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.
First. In a stove or Cooking range the combination therewith of the convertible
Huc mechanism, all substantially as herein described and shewn and for the
purposes specified.
Second. In a stove or Cooking range convertible flue mechanism, the combina-
ion therewith of a suspended swinging shutter D all substantially as herein
escribed and shewn and for the purposes specified.

page_text: Third. In a stove or Cooking range convertible flue mechanism the combination
therewith of a suspended swinging door D whether the said door is suspended
exactly as shewn herein or in some other equivalent manner, all substantially as
herein described and for the purposes specified.
Dated this 17th day of June 1880
JOSEPH
LOCKWOOD,
Argyle Street, Glasgow, Agent for the Inventors.