Improvements in Stoves and Cooking Ranges.
Year: 1888

page_text: * Date of Application, 13th Sept., 1888
Complete Specification Left, 23rd May, 1889-Accepted, 29th June, 1889
Improvements in Stoves and Cooking Ranges.
We, ANDREW TURNBULL and JOHN MATHIESON, of the firm of Turnbull
Mathieson & Co., Colonial Iron Works, Larbert, County of Stirling, North Britain
Ironfounders, do hereby declare the nature of this invention to be as follows:-
This invention relates to stoves and cooking ranges, and has for its objects to
adapt them for use, alternately, with an open top to the fire or a closed one as
required.
"
We effect this object by means of the following mechanism -We provide an
opening to the chimney (whether the latter he made of iron or built of brick or of
both iron and brick work combined) at its point of union with the hob, or hot plate, of
the range and in line with the fire space, and suspend across the said opening a
swinging metal shutter for the purpose of closing the said aperture when required.
Within the lower part of the chimney, and immediately behind the said shutter we
fit a loose metal frame (resembling in form a stool placed upside down). When this
stool is drawn forward froin the chimney, its upright sides press against the back of
the suspended, swinging, shutter and cause the latter to rise gradually into a
horizontal position and rest upon the stool (when the latter is drawn out) thereby
forming a tunnel shaped flue between the back of the fire and the chimney. The
"fire Cover" being removed either by lifting or sliding it the flame, and smoke
proceeding from the open top of the fire find escapement into the chimney through
this tunnel flue: This constitutes the open fire arrangement.,
If the "fire Cover" is then replaced above the fire and the metal stool pushed back
into the chimney the suspended, swinging, shutter falls down into its original vertical
position and closes the flue aperture first named: this constitutes the close. fire
arrangement.
In order to meet certain requirements connected with oven and boiler flues, when
applying our invention to cooking ranges, we (sometimes) place. the before named
metal stool in its natural (and not inverted) position within the chimney and make
the member which unites the two upright sides thereof together, smaller than the
chimney space, or construct openings and perforations in it so as to afford passage
for the hot currents proceeding from the oven, boiler or other flues to the chimney.
As the horizontal, or cross, member of the stool is only required for the purpose of
enabling the upright members of it to be simultaneously moved by means of their
rigid union therewith it may consist of one or more strips or girders so that whilst
firmly uniting the two upright side pieces together it affords no sensible obstruction to
the currents of heat which pass from beneath it into and through the chimney.
In order to regulate and divert the flow of heat proceeding from the fire to the
chimney and, 1st, cause it to proceed directly to the chimney without first circulating
round the oven or, 2nd, cause it to encircle the oven before entering the chimney
(when the cover is upon the fire) we employ certain damping appliances consisting of
à metal plate which is fitted, suitably for covering alternately either of two apertures
provided within or beneath the hot plate of the range at the base (and within the
precincts) of the chimney.
The said plate can be moved from side to side by means of extended portions
which protrude (and lie) upon the hob so that by pushing one or other of these
extending arms the said damping plate may be moved one way or another and made
to cover either the one aperture or the other as required.
We also provide a pivotted damper within the chimney space and cause it to fall
lown & cover the said flue apertures in the hob when the convertible flue frame is

page_text: drawn forward or rise into an erect position when the frame is pushed back into the
chimney.
Dated this 12th day of September 1888.
JOSEPH
LOCKWOOD,.
Glasgow, Agent for the Inventors.
COMPLETE SPECIFICATION.
Improvements in Stoves and Cooking Ranges.
We, ANDREW TURNBULL and JOHN MATHIESON of the firm of Turnbull
Mathieson & Co., Colonial Iron Works Larbert, County of Stirling North Britain
Ironfounders, 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 objects to
adapt them for use, alternately; with an open top to the fire or a closed one as
required.
We effect this object by means of the mechanism which is illustrated in the
accompanying diagrams in which
Fig. 1 is a view in perspective shewing our combined open and close fire mechanism
closed and in connection with a cast metal chimney placed in its natural position
upon the hob of a range and
Fig. 2 is a similar view in perspective shewing the said mechanism open.
Figs. 3 to 12 are views in elevation, section and perspective of the several parts
which compose our open and close fire mechanism.
In carrying out our invention in connection with a stove or cooking range-We
provide an opening to the chimney (whether the latter be made of iron or built of
brick or of both iron and brick work combined) at its point of union with the hob, or
hot plate, of the range and in line with the fire space, and suspend across the said
opening a swinging metal shutter for the purpose of closing the said aperture when
required.
Within the lower part of the chimney and immediately behind the said shutter we
'fit a loose metal frame (resembling in form a stool placed upside down). When this
stool is drawn forward from the chimney; its upright sides press against the back of
the suspended, swinging, shutter and cause the latter, to rise gradually into a
horizontal position and rest upon the stool (when the latter is drawn out) thereby
forming a tunnel shaped flue between the back of the fire and the chimney. The
"fire cover" being removed either by lifting or sliding it the flame and sinoke pro-
ceeding from the open top of the fire find escapement into the chimney through this
tunnel flue This constitutes the.open fire arrangement.
If the "fire cover" is then replaced above the fire and the metal stool pushed back
into the chimney the suspended, swinging shutter falls down into its original
vertical position and closes the flue aperture first named this constitutes the close
fire arrangement.
In order to meet certain requirements connected with oven and boiler flues; when
applying our invention to cooking ranges, we (sometimes) place the before named
metal stool in its natural (and not inverted) position within the chimney and make
the member which unites the two upright sides thereof together, smaller than the
chimney space, or construct openings and perforations in it so as to afford passage for
the hot currents proceeding from the oven, boiler or other flues to the chimney.
As the horizontal, or cross, member of the stool is only required for the purpose of
enabling the upright members of it to be simultaneously moved by means of their
rigid union therewith it may consist of one or more strips or girders so that whilst
firmly uniting the two upright side pieces together it affords no sensible obstruc-
tion to the currents of heat which pass from beneath it into and through the chimney.
In order..to regulate and divert the flow of heat proceeding from the fire to the

page_text: chimney and, first, cause it to proceed directly to the chimney without first circulating
round the oven or, Second, cause it to encircle the oven before entering the chimney
(when the cover is upon the fire) we employ certain damping appliances consisting of
a metal plate which is fitted, suitably for covering alternately either of two, apertures
provided within or beneath the hot, plate of the range at the base (and within the
precincts) of the chimney. The said plate can be moved from side to side by means
of extended portions which protrude (and lie) ;upon the hob; so that by pushing one
or other of these extending arms the said damping plate may be moved one way or
another, and made to cover either the one aperture or the other as required.
'We also provide a pivotted damper within the chimney space and cause it to fall
down and cover the said flue-apertures-in-the-hob-when-the-convertible flue frame
is drawn forward or rise into an erect position when the frame is pushed back into
the chimney.
Other dampers, more or less in common use are combined with those just named for
flue damping purposes.
In adapting our invention to a stove or cooking range which is furnished with a
complete metal chimney placed upon the hob as shewn in Figs. 1 & 2, we make
our cast metal chimney A (Figs. 1, 2, 3 & 4) in two principal parts marked B and C
which are united by metal straps marked D figs. 3, 4 and 12. When the metal
chimney frame is thus constructed the shutter E (Figs. 1, 2, and 11.) is suspended by
the pins F, F, placed in the sockets G, G, contained in the metal strap D figs. 1 to 12.
The stool II Fig. 6, being inserted within the chimney, a rod J (Figs. 1, 2 and 9) is
inserted within the hole K Fig. 3, and fastened to the stool frame at L (Figs. 6, 9 & 10.)
By pulling out the rod J, and with it the stool or frame H, to which it is fastened,
the suspended door or flap E is made to rise until it forms a cover or roof plate to the
stool or frame H as shown in Fig. 2. The fire cover being then removed the
apparatus constitutes on open fire Range or Stove.
If the cover is then put over the fire & the rod J pushed into the chimney the
door E falls into its vertical position again closing the orifice M, fig. 3, and converting
the apparatus again into a close fire stove or range.
By means of the grated or perforated top to the stool H as shewn in Fig. 6 the
smoke and other products of combustion are allowed free passage into the chimney,
from the flue N fig. 2-which communicates with the oven and other flues.
The stool H may be employed in an inverted. position as shown in figs. 5. and 8
or of a more skeleton form as shewn in Figs. 7, 9 and 10.
The projecting
flanges P figs. 6, 9 and 10 act as guides and travel within the groove Q contained in
the strap D figs. 3, 4 and 12. The chimney A may be made of either cast or wrought
metal and in any convenient shape.
.
"
When applying our invention to a range or stove with a chimney built of brick or
other material behind the metal work of the range, a "
cove plate" or "skirting
is furnished with similar provisions to those described herein for suspending the
door E and propelling. the frame H in and out of the chimney, grooved straps D
or their equivalents being employed from which to suspend the door E and within or
upon which to guide the frame or stool Has it travels in and out.
The straps D are designed to serve a threefold purpose namely 1st to unite the two
parts of our metal chimney frame together, 2nd to serve as guides for the stool
or frame H and 3rd to provide sockets within which to suspend the door E.
When we use the stool H in the inverted forms shewn in Figs. 5, 7 & 8 we do not
require the rod J to propel it.
The flue damping appliances herein named form no essential part of our invention.
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:
1st. In a stove or cooking range the combination therewith of a stool or frame H,
all substantially as herein described and shewn and for the purposes specified.

page_text: 2nd. In a stove or cooking range the combination with the chimney thereof of the
straps D or their equivalents all, substantially. as herein described and shewn and for
the purposes specified...
3rd. In a stove or cooking range the combination therewith of the open and
close fire mechanism all substantially as herein described and shewn and for the
purposes specified:
T
JOSEPH LOCKWOOD,
Argyle Street, Glasgow, Agent for the Inventors...