Improvements in and in relation to Stoves and Cooking Ranges.
Year: 1893

page_text: Date of Application, 24th Aug., 1893
Complete Specification Left, 23rd May, 1894-Accepted, 23rd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in and in relation to Stoves and Cooking Ranges.
We, JOHN NICOL MITCHELL, Ironfounder, and WILLIAM MORRISON,
Foreman, both of Parkhouse Iron Works, Falkirk, in the County of Stirling,
North Britain, do hereby declare the nature of this invention to be as follows:-
It relates to stoves and cooking ranges and has for its objects:-
1st. To combine with them certain damping appliances for closing and opening
one or more of their flues:
2nd. For directing and diverting the currents of heat passing through the said
flues: and
3rd. For other useful purposes.
In carrying out our invention in connection with a stove or cooking range having
a moveable flue for combined open and close fire purposes we furnish the said
moveable flue with a V shaped damper, adjusted to cover the front aperture of the
said flue.
This moveable flue is made to travel in either a forward or backward direction
from the back of the range towards the fire and vice versa, alternately as required,
for open, and close-fire purposes.
When this flue piece is in its backward position one side plate (forming part) of
the V shaped damper closes the front aperture thereof thereby adapting the flue
piece for close-fire purposes. The front plate of the said damper is then upright,
the point of the V being at the top and the back plate of the damper slopes inwards
within the flue and downwards towards the hob.
When the flue piece is drawn forward the top edge of the ✓ shaped damper
moves in a forward direction also-forward and downward, describing a segment-
until it is laid flat upon the hob within the flue piece which is then fully drawn out
and is adapted for open fire purposes.
The back plate of the damper is then sloping upwards within the flue piece and
serves to direct the smoke and heat proceeding through the flue upwards towards
its roof.
The roof of the flue piece (frequently) contains a circular hole and cover therefor
which cover can be removed and a kettle or pan inserted in its place.
Our improved damper serves the purpose, when the apparatus is (thus) in use, of
directing the heat currents which pass through the flue, in an upward direction
towards the roof, kettle or other vessel which is within or upon the aforesaid hole
in the roof plate.
As the front plate of the ✓ shaped damper rests, face downwards, upon the hob
when the flue piece is used for open-fire purposes the face of it is kept free from
the soiling effects of smoke and flame.
The inclined shed of the damper serves also to hide from view the blackened
interior of the flue piece when it is drawn forward, and acts as a check to counteract
the effects of down draughts.
We connect the said Hue piece and V shaped damper together so that they are
reciprocal in their movements. The operation of the one induces the requisite
movement of the other.
When the flue piece is drawn forward the attitude of the door plate is altered
from the vertical to the horizontal.
When the door plate is raised from a horizontal plane to a vertical one it presses

page_text: back the flue piece to its original position and closes its frontal opening, thereby
adapting the flue piece for close fire purposes.
Dated this Twenty-second day of August 1893.
JOSEPH LOCKWOOD,
263, Argyle Street, Glasgow, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in and in relation to Stoves and Cooking Ranges.
We, JOHN NICOL MITCHELL Ironfounder, and WILLIAM MORRISON,
Foreman, both of Parkhouse Iron Works, Falkirk, in the 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 objects,
1st. To combine with them certain flue damping appliances for closing and
opening one or more of their flues ;
2nd. For directing and diverting the currents of heat passing through the said
flues, and
3rd. For other useful purposes.
In carrying out our invention in connection with a stove or cooking range having
a moveable flue for combined open and close fire purposes we furnish the said
moveable flue with a V shaped damper adjusted to and designed to cover the front
aperture of the said flue.
This moveable flue is made to travel in either a forward or backward direction
from the back of the range towards the fire space, and vice versa, alternately as
required for open or close fire purposes.
When this flue piece is in its backward position, within the chimney or back flue
of the apparatus, one side plate forming part of the V shaped damper closes the
front aperture of the flue piece thereby adapting the flue piece for close fire
purposes. The front plate of the said damper then occupies a vertical position. In
this position the point of the V damper is uppermost and its back plate slopes
inwards within the flue piece and downwards towards the hob.
When the flue piece is drawn out from the backward position above described,
the top edge of the V shaped damper moves in a forward direction also-forward
and downward describing a segmental course-until it is laid flat upon the hob
within the flue piece which is then fully drawn out and is adapted for open fire
purposes.
The back plate of the damper, in the altered position just described, slopes
upwards within the flue piece and serves to direct the smoke and heat proceeding
through the flue upwards towards its roof.
The roof of the flue piece generally contains a circular hole and round cover
therefor which cover can be removed and a kettle or pan inserted within or upon the
hole.
Our improved damper serves the purpose, when the apparatus is thus in use of
directing the heat currents which pass through the flue, in an upward direction
towards the roof, kettle, or other vessel which is within or upon the aforesaid hole
in the roof plate.
As the front plate of the V damper rests face downwards upon the hob when
the flue piece is used for open fire purposes the face of it is kept free from the
soiling effects of smoke and flame.
The inclined shed of the damper serves, when the flue piece is drawn forward,
to hide from view the blackened interior of the flue. It also acts as a check to
counteract the effects of downdraughts.
We connect the said flue piece and V damper together so that they may be, and

page_text: are, reciprocal in their movements.
movement of the other.
The operation of the one induces the requisite
When the flue piece is drawn forward from the chimney the attitude of the door
plate is altered from a vertical to a horizontal position.
When the door plate is raised from a horizontal plane to a vertical one it presses
back the flue piece into its original position and closes its front opening thereby
adapting the flue piece for close fire purposes. If the flue piece is pushed backwards
it raises the door plate into an upright position.
Our invention will be better understood on reference to the accompanying
drawings in which ;
Figure 1 is a front view in perspective of our improved flue piece and V damper
drawn out upon the hob and open.
Figure 2 is a sectional view of the parts shewn in Fig. 1.
Figure 3 is a sectional view of the flue piece shewn in Fig. 1 when it is pushed
back into the chimney and closed.
Figure 4 is a perspective view of our V damper detached from the flue piece..
Similar letters of reference upon the several drawings indicate corresponding
parts.
Upon the inner lining of the flue piece A we construct curved or S shaped
flanges B, Figs. 1, 2 and 3 for engaging with the projecting parts or pins C upon
the back plate D of the V damper Figs. 1 to 4.
When the V damper is in the upright position, shewn in Fig. 3, closing the front
aperture of the flue piece the parts C are beneath the lower part of the curved
flanges B and the apex of the V damper is held in position by the weight of the
fiue piece which rests upon it at E.
If the flue piece A Fig. 3 is drawn forward upon the hob G into the position
shewn in Fig. 2 it carries forward the V damper, moving it first at the apex E
from its perpendicular position as a door plate until that part of it which is
marked Flies proue upon the hob, as shewn in Figs. 1 and 2. The flue piece A
can then be drawn still further forward, past the V damper, leaving the latter upon
the hob at its rear, the sides of the V damper being cut away below the parts C
to allow the curved flanges B to get past it.
Upon pressing the flue piece A in a direction backward from that shewn in
Fig. 2 the upper part (6) of each curved flange engages with the pins or parts C
upon the V damper and as its face plate F is held in position upon the hob by one
or more stops at fit is thereby prevented from sliding backwards, the backward
pressure of the curved flanges upon the parts C causes the damper to rise up until
it attains a vertical position within the flue piece the part closing its front
aperture as shewn in Fig. 3. In this position the curved flanges are a stop to the
parts C and the weight of the flue piece A, resting as before described upon the
apex E of the V damper, the latter is kept with its face plate F in a vertical
position closing the entrance to the flue piece.
The flue piece and V shaped damper are thus connected together by means of
the curved flanges B and parts marked C and are enabled principally by them to
act simultaneously as the flue piece A is moved in a forward or backward direction
upon the hob furnished with stop or stops f¹.
We are aware that previous to our invention moveable flue pieces operated
similarly to that herein described and shewn have been made and used in connection
with stoves and cooking ranges for combined open and close fire purposes; that
dampers for closing and opening the front apertures of such moveable flues have
been combined therewith; also that such dampers have been made so that they
would lie when required in a sloping position for directing the heat currents to
the roof of the flue and have been moved from their vertical into sloping positions
or vice versa by means of the backward and forward operations of the flue piece
and of sloping flanges and stops contained upon the inside lining of the flue piece
for acting upon the said dampers. It will therefore be understood that we do not
claim any of these provisions exclusively as our invention.

page_text: 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 the flue opening
and closing devices substantially as herein described and drawn for the purposes
specified.
2nd. In a stove or cooking range the combination with its moveable flue piece
of a V shaped damper constructed and operated substantially as herein described
and drawn for the purposes specified.
3rd. In a stove or cooking range the combination with its moveable flue piece
of curved flanges B as and for the purposes specified and substantially as herein
described and drawn.
4th. In a stove or cooking range having a moveable flue piece A. the combination
with a damper plate F of the back parts C as and for the purposes specified and
substantially as herein described and drawn.
Dated thin nond
1004
JOSEPH LOCKWOOD,
263, Argyle Street, Glasgow, Agent for the Applicants.