COMBINED OPEN AND CLOSE FIRE RANGES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We, GEORGE KINNAIRD Senior, and GEORGE KINNAIRD Junior, and JOHN
KINNAIRD (sons of the first named) Ironfounders and Manufacturers, trading under
the style of Kinnaird & Ferguson" at Queen's Park Foundry, Cavendish Street,
Glasgow in the County of Lanark do hereby declare the nature of our invention
for COMBINED OPEN AND CLOSE FIRE RANGES to be as follows:-
We have altered our ordinary Close Fire Ranges so that they can be used
variously both as Close Fire Ranges and as Open Fire ditto, alternately from one
way to the other as required. Thus, we have cut away a portion of the metal
coves immediately opposite to and above the level of the fire and extending
upwards for a few inches above the level of the hotplate, so as to open a way for
the smoke into the brick flue at back of Range.
The bottom of brick flue is made quite even and level with the back strap of
hotplate. Into this aperture we have adjusted an iron carriage or gangway with
inclined floor or bed plate, but upright or vertical sides and to which sides are
hinged two folding doors which close over the aperture like a pair of carriage gates
after this carriage or gangway has been pushed back into the dock formed for it by
the lower part of brick flue.
When these doors are closed over the aperture the Range is technically a Close
Fire Range.
If the said doors are opened & pulled forward they drag the carriage or gangway,
to which they are attached on to the back strap whilst the doors extend to the back
of the fire.
The fire cover can now be removed and placed in the manner of a roof or cover
resting on the top of the gangway and doors and so forms a complete but portable
flue, the inclined floor or bed of the gangway giving a direct upward tendency to
the current of heat passing through this portable into the brick flue.
We have constructed a self-adjusting ventilator for carrying off offensive odours
into the flue, which are generated during the process of cooking outside of the
ovens.
Thus, by attaching to the upper edges of the soot-door (opening into the middle
flue at back of Range) small projecting pins which rest within corresponding sockets
attached to and cast on the coveplate, we are enabled to work this door as though
Prine 1

page_text: it was hinged to the coveplate. We also make it self-adjusting by means of a flange
or flanges cast on the back of it, and shaped so as to keep it standing open at any
elevation required.
Our Invention consists in forming a portable flue of a telescopic character by
means of hinging the doors in manner described to the sliding carriage or gangway;
and by constructing a self-adjusting and ventilating soot door in the manner already
described. By this Invention we are enabled to form a portable flue from the very
verge of fire back, however shallow the brick flue at back of Range may be.
Dated this Twenty ninth day of October Eighteen hundred and eighty four.
We, GEORGE KINNAIRD, senior, and GEORGE KINNAIRD junior, and JOHN
KINNAIRD, (Sons of the first named George Kinnaird) Ironfounders and Manu-
facturers, trading under the style of "Kinnaird and Ferguson" at Queen's Park
Foundry No 43 Cavendish Street Glasgow in the County of Lanark, do hereby
declare the nature of our invention for COMBINED OPEN & CLOSE-FIRE RANGES
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement namely :—
A plan by which we are enabled to convert our ordinary close-fire ranges into
combined open and close-fire ranges and which consists,
First, in the formation, and application to our ordinary close fire ranges of
a portable flue of an expansive character which is placed in the recess formed by
the ordinary flue at the back of the range so that it may be drawn forward and
used when an open fire is required or pushed back into its recess when the fire
cover is on and the apparatus working as a close fire range; and
Secondly in a new form of soot door which is self-adjusting and serves the
purposes of a combined soot door and ventilator.
The following description and accompanying illustrations, lettered to correspond
with the said description, portray the essential parts of our invention.
We alter our ordinary Close fire Ranges by taking away a portion of the metal
plate at back thereof and commonly called the back cove plate, and thus form an
aperture in which to insert a portable flue.
This aperture is in the lower part of the said cove plate (or skirting) and is
immediately opposite to the back of the fire, its width being about the same as the
fire and several inches in height. We thus form, or open, a way for the smoke into

page_text: the flue at the back of the range. See Figure 1 in the accompanying series of
diagrams, which shews the back cove plate R, the aperture A and the back flue B,
besides and together with other parts to be hereinafter described.
The bottom or floor of the back flue is formed by a metal plate which is level
with, or a continuation of, the plate called the "back strap" of the "hot plate.".
See Fig 1 for "back strap" D and the elongation of it, C, for the floor of the
back,flue.
Into this aperture we have adjusted a portable flue which has an inclined floor
but upright or vertical sides and to these sides are attached, by hinges, two folding
doors which close over the aperture after this portable flue has been pushed back
into the recess formed for it by the lower part of the back flue. The special
advantage of these hinged doors is that whilst they lengthen the travelling when it
is in use they remove the necessity for a deep recess at back of Range for the
purpose of secreting the portable flue when it is not in use.
Figs 2. 3. 4 and 7 represent the moveable flue. E. the ledges to be hereinafter
described. F the inclined floor. G the upright sides of flue. H the hinge (or
hinges) J. the doors. In Figs. 1 and 8 the fire cover Q is shewn in position over
the fire. In Figs. 7 and 9 L shews the fire cover resting upon the doors and sides
of the apparatus in the manner of a roof and so completes the structure called
herein, the "moveable" or "portable flue," (and sometimes, the "travelling flue.")
When the moveable flue has been pushed back into the recess and these doors
are closed over the aperture the whole structure is technically termed a "close-fire
Range." Fig 8 is an illustration of this arrangement.
If the before mentioned doors are opened and pulled forward they drag the
portable flue to which they are attached, along the face of the "back strap
33 until
the doors extend to the back of the fire as shewn in Fig. 7. where K. represents the
fire back.
The fire cover can now be removed, with handles or hooks and placed in the
manner of a roof or cover upon the upper parts or edges of the travelling flue, or
on ledges on the inner sides of it and its doors, and so forms a complete but portable
flue, the inclined floor of it giving an upward tendency to the current of heat
passing through this flue into that at the back of the Range. See E Figs 2. 3 and 4
which shew the ledges on the doors and upright sides of portable flue.
Our self adjusting combined ventilator and soot door is designed carry off any
odours of cooking into the back flue (or flues) of the range and at the same time
afford the usual facilities of an ordinary soot door for the purpose of cleaning out
the flues, its construction is as follows,
By attaching to the upper edges of the soot door small projecting pins which rest
within corresponding sockets attached to the metal cove plate surrounding the door
we are enabled to work this door as though it was hinged to the said metal plate.
We make this door self adjusting and at the same time convertible into
a ventilator by means of a flange, or flanges, cast on the back of it and so shaped
as to keep it standing open at any elevation required.
Fig. 1 shews the metal cove plate R with sockets M. M. adjacent to the opening
for cleaning the back flue. Figs. 5 and 6 shew the back parts of ventilating soot
door N with the pins P. P. and the flange W. or flanges W. W. Fig. 7 shews this
door closed. Fig. 8 shews the door open and the manner in which the flange W
enables it to be used as a ventilator.
The particulars thus described and detailed comprise the essential and novel parts
of our invention.
To prevent any misapprehension we wish to say that we do not claim, as any
part of our invention the use of the fire cover as a roof for the portable flue, neither
the strips or ledges upon which we lodge it within the doors or sides of same, nor
the method of lifting the fire cover by means of hooks etcetera; these several
methods of construction and use being commonly practised by makers of cooking
ranges.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
First, the travelling or portable flue made with hinged doors and sloping floor as
herein described and drawn, and,
" self
Secondly, the principle of combining in one article, (designated herein a
adjusting combined ventilator and soot door") the purposes of a ventilator to the
Range and a cleaning door for the flue (commonly called a "soot door") together
with the several methods of constructing and hingeing the same as herein described
and illustrated.
DANALÍ, Kichth dow of June in the year of our Lord Eighteen hundred and
Eighty five.
JOSEPH LOCKWOOD,
Agent for the before named inventors, George Kinnaird, Senior, George
Kinnaird, Junior, and John Kinnaird (sons of the first named George
Kinnaird), Ironfounders and Manufacturers, trading under the style of
Kinnaird and Ferguson, at Queen's Foundry, N° 43, Cavendish Street,
Glasgow, in the County of Lanark.