Year: 1887

page_text: Date of Application, 11th Mar., 1887
Complete Left, 25th Nov., 1887.
Complete Accepted, 27th Dec.. 1887
We GEORGE GORDON BRODIE of Catherine Street Aston near Birmingham in the
County of Warwick Ironfounder and JAMES DAMREL PRIOR of No. 143 Isledon Road
Finsbury Park London in the County of Middlesex Manager do hereby declare the
nature of this invention to be as follows:-
Our invention consists in constructing and arranging in the manner hereinafter
described the flues of cooking ranges and appliances connected therewith the object of
our invention being to secure such a command over the circulation of the flame and
heated air from the fire of the range as to be able to determine at pleasure the greater
heating either of the bottom of the oven or the upper part of the oven and the top
plate of the range.
The oven has a casing extending over its vertical side adjacent to the fire under
its bottom over its vertical side most distant from the fire and over its top the said
casing constituting with the two vertical sides and top and bottom of the oven a con-
tinuous flue passing over four of the sides of the oven. The flue betwen the vertical
side of the oven adjacent to the fire and the side of the fire hox or grate is divided by
a vertical division near its middle into two paris thus forming two smaller flues which
we will call the front and back flues respectively. These front and back flues open at
bottom into the flue under the bottom of the oven.
Extending from front to back of the range and at the level of the top of the oven
is a shaft or axis having at its front protruding end a crank or handle by which it can
be turned through an angle of ninety degrees. This shaft is situated near and parallel
to the top left hand angle of the oven and carries two flaps situated in planes at right.
angles to one another. These flaps have such a size shape and position as to fit them
to close or open the tops of the front and back flues respectively by the turning of the
shaft. As these flaps are at right angles to one another when one is vertical the other
is horizontal and the reverse. When either of the said flaps is horizontal the flue at
which it is situated is closed and the other flap being vertical its flue is opened. By
D

page_text: turning the crank or handle described through a right angle in one direction the front
flue may be opened and the back flue closed and by giving the said shaft a reverse
motion the front flue may be closed and the back flue opened.
The action of the apparatus is as follows:-When the handle is turned so as to
bring the flap of the front flue into a vertical position and the flap of the back
flue into a horizontal position the said front flue is opened and the back flue at
the same time closed by its flap having been brought into a horizontal position.
The flame and heated air from the fire now pass down the front flue under the
bottom of the oven up the flue most distant from the fire over the top of the oven
and over the horizonial flap closing the back flue to the chimney.
When the handle
is so turned as to bring the flap of the front flue into a horizontal position and the
flap of the back flue into a vertical position the flame and heated air pass over the
top of the oven down the distant flue under the bottom of the oven and up the back
flue to the chimney. In the former position of the flaps the bottom of the oven is
most heated in the latter position of the flaps the top of the oven and hot plate
are most heated.
Although we have only described our invention as applied to a cooking range
having one oven yet our invention may be applied to cooking ranges having ovens
on each side of the fire place.
Datad this Flacanth day of March 1887
W. T. WHITEMAN,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Cooking Ranges.
We GEORGE GORDON BRODIE of Catherine Street, Aston, near Birmingham in the
County of Warwick, Ironfounder and JAMES DAMREL PRIOR of No. 143 Isledon
Road, Finsbury Park, London in the County of Middlesex, Manager do hereby
declare the nature of our invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
Our invention consists in constructing and arranging in the manner hereinafier
described, the flues of cooking ranges and appliances connected therewith, the object
of our invention being to secure such a command over the circulation of the flame
and heated air from the fire of the range as to be able to determine at pleasure the
greater heating either of the bottom of the oven or the upper part of the oven and the
Top plate of the range.
The oven has a casing extending over its vertical side adjacent to the fire, under
its bottom, over its vertical side most distant from the fire and over its top, the said
casing constituting with the two vertical sides and top and bottom of the oven a
continuous flue passing over four of the sides of the oven. The flue between the
vertical side of the oven adjacent to the fire and the side of the fire box or grate is
divided by a vertical division near its middle into two parts thus forming two smaller
flues which we will call the front and back flues respectively. These front and back
flues open at bottom into the flue under the bottom of the oven. Extending from
front to back of the range and at the level of the top of the oven is a shaft or axis
having at its front protruding end a crank or handle by which it can be turned
through an angle of 90 degrees. This shaft is situated near and parallel to the top
left (or right) hand angle of the oven and carries two flaps situated in planes at right
angles to one another. These flaps have such a size shape and position as to fit them
to close or open the tops of the front and back flues respectively by the turning of the
shaft. As these flaps are at right angles to one another when one is vertical the other
is horizontal and the reverse. When either of the said flaps is horizontal the flue at
which it is situated is closed and the other flap being vertical its flue is opened. By
turning the crank or handle described through a right angle in one direction, the
front flue may be opened and the back flue closed and by giving the said shaft a
reverse motion the front flue may be closed and the back flue opened.
The action of the apparatus is as follows:-
When the handle is turned so as to bring the flap of the front flue into a vertical
position and the flap of the back flue into a horizontal position the said front flue is
opened and the back flue at the same time closed by its flap having been brought into
a horizontal position. The flame and heated air from the fire now pass down the
front flue, under the bottom of the oven, up the flue most distant from the fire, over
the top of the oven and over the horizontal flap closing the back flue to the chimney.
When the handle is so turned as to bring the flap of the front flue into a horizontal

page_text: oven,
and
position and the flap of the back flue into a vertical position the flame and heated air
pass over the top of the oven, down the distant flue, under the bottom of the
up the back flue to the chimney. In the former position of the flaps the bottom of
the oven is most heated in the latter position of the flaps the top of the oven and hot
plate are most heated.
Although we have only described our invention as applied to a cooking range
having one oven yet our invention may be applied to cooking ranges having ovens on
each side of the fire place.
We will now proceed to describe with reference to the accompanying Drawing the
manner in which our invention is to be performed.
Figure represents partly in front elevation and partly in longitudinal vertical
section Figure 2 in transverse section looking towards the fire place and Figure 3
in plan partly broken off and the top cover removed, a portion of a cooking range the
flues of the oven and the appliances connected with the said flues being constructed
according to our invention Figure 4 represents in end elevation and plan the shaft
or axis and the flaps carried thereby detached from the range.
The same letters of reference indicate the same parts in the several Figures of the
Drawing.
The range represented has at one side of the fire box or grate a an oven and at
the other side of the said fire box or grate a boiler c but our improvements may be
used in combination with a range having an oven on each side of the fire box or grate
as herein before explained.
b
is
The casing constituting the continuous flue around the four sides of the oven
marked d d ; and y. The vertical flue marked d, d between the fire box or
grate a and the vertical side of the oven adjacent to the said fire box is divided by
the vertical division near its middle into two parts, the front part of the divided
flue being marked d and the back part d², both parts d and d² of the divided flue
opening at bottom into the flue e under the bottom of the oven (see Figures 1 and 2).
The part of the vertical flue adjacent to the fire box a is hereinafter called the front
flue and that marked the back flue. The parte of the continuous flue is situated
under the bottom of the oven b, the part at the vertical side of the oven most distant
from the grate and the part g over the top of the oven from whence it opens into the
chimney is the shaft or axis by the turning of which the direction of the current
of the heated air passing around the oven is changed. The said shaft or axis k
extends from front to back of the range (see Figures 2 and 3) and its projecting end
at the front of the range has a crank or handle 7 upon it by which it can be turned
through a quadrant. The said shaft k carries two flaps m and p, p² situated in planes
at right angles to one another (see the separate view Figure 4). The flap m is
situated on the shaft or axis opposite the front flue d and the other flap, p² is
situated on the shaft or axis opposite the back flue d². By thus arranging the flaps
it will be understood that when either one of the said flaps or p, p² is horizontal the
other one of the said flaps is vertical and the reverse. The arcs through which the
flaps m and p, move are indicated in dotted lines in Figure 1.
In the Drawing the flap p, is represented turned into a horizontal position and
the other flap m into a vertical position. When the flaps are in these positions the
top of the front flue d is opened and the top of the back flue d is closed and the flame
and heated air from the fire box or grate a pass down the front flue d under the
bottom flue e, up the vertical fluef and along the flue g over the top of the oven and
top of the horizonial flap p², closing the back flue d², to the chimney . The
direction of the current of heated air circulating around the oven when the flaps are
in the positions described and represented is indicated by the full lined arrows. By
turning the handle 7 through a quadrant the flap m is brought into a horizontal
position as indicated in dotted lines in Figures 1 and 3 and the top of the front flue d
is closed. The flap is at the same time moved into a vertical position as indicated
in dotted lines in Figure 1 and the top of the back flue d is opened and the circulation
of the current of flame and heated air through the flues is reversed. That is to say,
the flame and heated air from the fire box a now pass over the flap m, closing the top

page_text: of the front flue d, through the top flue g, down the side flue along the bottom
flue e and up the back Hue to the chimney . The direction of the current of
heated air through the flues when the flaps are in the positions last described is
indicated by the dotted arrows. When the flap p. p² is vertical the part or iail p² of
the said flap closes the top flue g and thereby shuts off the communication of the said
top flue 9 with the chimney i.
When the heated air circulates around the oven in the direction indicated by the
full lined arrows the bottom of the said oven is most heated and when the heated
air circulates around the oven in the direction indicated by the dotted arrows
the top of the oven and the hotplate of the range are most heated as will be
understood by an examination of Figure 1.
Instead of dividing the flue situated between the fire box a and the side of the oven
adjacent to the said fire box, into two flues marked respectively d and d² by a vertical
division marked passing from top to bottom of the divided flue as described and
represented in the accompanying Drawing, the vertical division may be shortened,
that is, it need only extend downwards to the axis or shaft k or to a short distance
below the said axis or shaft k. In this modification the upper portion only of the
flue between the fire box and side of the oven is divided into two parts but the action
of the flaps m and p, p² upon the divided flue for controlling the direction of the
current of flame and heated air through the continuous flue of the oven is the same as
that already described. We prefer however to use the continuous vertical division h
as the arrangement is more efficient with the continuous division h than with the
shortened division last described.
Having now particularly described and ascertained the nature of our inven-
tion, and in what manner the same is to be performed we declare that we claim
as our invention of "Improvement in kitchen ranges
"
Dividing into two parts by a vertical division that portion of the continuous flue of
the oven (or ovens) situated between the vertical side of the oven adjacent to the
fire and the side of the fire box or grate and the combination with the said divided
Alue of regulating flaps carried by a horizontal shaft or axis capable of motion
through an angle of ninety degrees, whereby the direction of the circulation of the
flame and heated air through the continuous flue of the oven (or ovens) can be
changed at pleasure so as to effect the greater heating either of the bottom of the oven
or the upper part of the oven and the top plate of the range, the several paris being
constructed arranged and working substantially as hereinbefore described and
illustrated in the accompanying Drawing. Also the modification described in which
the vertical division of the front divided flue is shortened the shortened division
extending downwards to the axis or shaft of the regulating flaps or to a short
distance below the said axis or shaft as described.
Dated this Twenty first day of November 1887.