IMPROVEMENTS IN COOKING RANGES
Year: 1884

page_text: PROVISIONAL SPECIFICATION,
I, DAVID COWAN, of Mount Gerald, Larbert, in the County of Stirling, North
Britain, Civil Engineer, Manager for Carron Company incorporated by Royal
Charter, do hereby declare the nature of my said invention for "IMPROVEMENTS
IN COOKING RANGES" to be as follows, that is to say :-
My said Invention has for its object to improve the construction of cooking
ranges; and in carrying it out, whilst various parts not hereinafter referred to may
be constructed as in existing ranges, the following improvements are applied.
In the back coving or skirting of the range there is placed a special plate having
an opening connected to a flue pipe or uptake at the back; and in the opening
there is fitted an adjustable telescopic piece or combination of pieces with damper
and front plate, arranged so that when in its innermost position the fire acts as a
close fire; whilst on pulling forward the parts a passage is formed for leading tho
fire gases from the fire directly into the back flue or uptake, the communication
with the oven flue or flues being at the same time closed so that the fire ithen
becomes an open fire. The oven or each oven when there are more than one'is
held or partly held in place by means of a frame fixed to the front edges of the
top, bottom, and sides, and this frame is fixed to the outside of the front vertical
plate of the range round the opening through which the oven is inserted. The
outer face of the frame against which the oven door closes is planed or otherwise
rendered smooth so that the door when shut may be in close contact with it.
The
Instead of fixing the front fire bars to the sides or cheeks of the fire box by
screws or by riveting the top and bottom horizontal bars to the cheeks, I make the
top and bottom bars to project beyond the cheeks when in position and cut a
groove, in each end of each bar about half through each bar. I form notches in the
cheeks in suitable positions to receive the bars and I interlock the parts together,
displacement being prevent by the connections of other parts of the range.
cheeks of the fire box are formed with openings or slots of angular or other suitable
form, for the passage of the fire gases from the fire into the oven flues when the
range is being used with a close fire. With this arrangement, instead of smoky
gases passing from the top of the fire into the oven flues as in ordinary ranges, the
gases have to pass to some extent downwards or laterally through the incandescent
fuel, and are consequently hotter and freer from smoke when passing through the
oven flues. The gases thus enter the oven flues at a little distance below, the top
of the oven on the side next the fire, and can be made to proceed over and under
the oven in any desired proportions by means of an easily adjustable valve in the
part of the flue at the top of the oven.

page_text: I, DAVID COWAN, of Mount Gerald, Larbert, in the County of Stirling, North
Britain, Civil Engineer, Manager for Carron Company, incorporated by Royal
Charter, do hereby declare the nature of my said invention for "IMPROVEMENTS
IN COOKING RANGES" and in what manner the same is to be performed, to bo
particularly described and ascertained in and by the following statement, that is
to say:
My said Invention has for its object to improve the construction of cooking
ranges; and in carrying it out, whilst various parts not hereinafter referred to may
be constructed as in existing ranges, the improvements hereinafter described are
applied.
My improvements are shown on an accompanying sheet of explanatory drawings
on which sheet figure, 1; is a vertical section parallel to the front of a cooking
range, figures, 2, and 3, being vertical sections as at right angles to figure, 1, and
showing certain parts in different positions, whilst figure, 4, is a horizontal section.
Figures, 5, and 6, are a horizontal and a vertical section showing a mode of
securing the front vertical grate of the cooking range; and figures, 7 and 8 are
similar views showing a modification. In these drawings the same reference
numerals are used to mark the same or like parts wherever they are repeated.
In the back coving or skirting, 9, of the range there is formed an opening
connected to the flue pipe or uptake, 10, at the back; and in the opening there is
fitted a telescopic combination consisting of an inner piece, 11, a damper, 12 and a
front plate, 13, and. arranged so that when it is in its innermost position, as shown
in figure, 3, the fire acts as a close fire, whilst on pulling forward the parts, as
'shown in figure, 2, a passage is formed for leading the fire gases from the fire
directly into the back flue or uptake, 10, the communication with the oven flue or
flues being at the same time closed by the damper, 12, so that the fire then
becomes an opon firo, its cover, 14, being removed. The inner piece, 11, of the
telescopic combination consists of two vertical sides connected by top and bottom
frame bars, 15, 16, at the back, and by a transverse rod 17, near the front edges of
the sides. The damper, 12, has its bottom resting on the lower back frame bar, 16,
of the piece, 11, and when this piece is drawn forward it draws the damper, 12,
into the position in which it is shown in figure, 2. The front plate, 13, is cast in
one piece with two sides, 18, in which slots are formed for the rod, 17 which
connects the front part, 13, to the inner part, 11. When closing the parts, the
front plate, 13, is turned from its horizontal position as shown in figure, 2, into a'
vertical position and is at the same time pushed inwards; and these movements
are of course reversed when opening the parts.
The oven, 19 (or each oven when there are more than one) is held or partly
held in place by means of a frame, 20, fixed to the front edges of the top, bottom,
and sides; and this frame, 20, is fixed to the outside of the front vertical plate, 21,
of the range round the opening through which the oven 19, is inserted. The outer
face of the frame, 20, against which the oven door, 22, closes, is planed or otherwise
rendered smooth so that the door when shut may be in close contact with it,

page_text: .
Instead of fixing the front fire bars, 23, to the sides or cheeks, 24, of the fire box
by screws or by riveting the top and bottom horizontal bars to the cheeks, I make
the top and bottom bars to project beyond the cheeks, 24, when in position, or I
make projections, 25, at the sides of the frame of bars at or near the top and
bottom; and I cut or form a groove on the underside of each projection, 25.
I form notches in the cheeks, 24, in suitable positions to receive the projections, 25,
and I interlock the parts together as will be understood from figures, 5, and 6,
displacement being prevented by the connections of the other parts of the range.
Instead of the notches with which the projections, 25 interlock being in the
cheeks, 24, they may be in snugs, 26, cast on the front plates, 21, as shown in
figures, 7, and 8.
The cheek, 24, at the side of the fire box next the oven, 19, or each of the cheeks
if there is an oven on each side) is made with openings or slots, 27, of angular or
other suitable form, for the passage of the fire gases from the fire into the oven
flucs when the range is being used with a closed fire. With this arrangement,
instead of smoky gases passing from the top of the fire into the oven flues as in
ordinary ranges, the gases have to pass to some extent downwards or laterally
through the incandescent fuel, and are consequently hotter and freer from smoke
when passing through the oven flues. The gases thus enter the oven flues at a
little distance below the top of the oven, 19, on the side next the fire, and can be.
made to proceed over and under the oven in any desired proportions by means of
an easily adjustable valve, 28, in the part of the flue at the top of the oven.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
1. The telescopic combination consisting of the parts, 11, 12, 13, for converting
the range to a close-fire or open-fire arrangement these parts being constructed and
combined substantially in the manner hereinbefore described and shown in the
accompanying drawings.
2. The mode of holding the oven in place by a frame fixed to it and to the
outside of the front plate of the range the outer face of the frame being made
smooth for the door to close upon it substantially as herein before described.
3. The securing of the front fire bars in the improved manner hereinbefore
described and shown in the accompanying drawings.
4. The providing of access for the fire gases from the fire box into the oven flues
by openings in the firebox cheek substantially as and for the purpose hereinbefore
described.