Year: 1887

page_text: Date of Application, 15th Apr., 1887
Complete Left, 11th Jan., 1888
Complete Accepted, 24th Feb., 1888
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 this Invention to be as follows, that is
to say :-
My said Invention comprises improvements in cooking ranges and stoves or
detached fire places.
One improvement relates to ovens of cooking ranges or of detached cooking
stoves, and consists partly in forming the oven door with a perforated orna-
mental panel and with a sheet of wire gauze enclosing a space on the inside
of the perforated panel. The door is made with a rib projecting like a frame on
its inner side and the sheet of wire gauze is stretched over this rib and gripped
between its outer side and a frame which is fixed to the door by bolts or screws. With
this improved arrangement the interior of the oven is ventilated in a superior
manner, the air passing through the perforated panel being uniformly distributed in
passing through the wire gauze and entering the oven at a temperature but little
lower than that of the oven itself. The ventilation is regulated by controlling the
egress of the heated air from the oven, a valve or valves being fitted for closing or
more or less opening outlets which are provided at any suitable part. Such air outlets
are by preference made along the top of the side of the oven further from the fire and
in a cooking range lead into a flue formed behind the lateral closing plates.
Another improvement consists in forming the joint connecting any two plates
which are at right angles to each other in a novel manner and is applicable to cooking
ranges and stoves or fire places of various kinds. In carrying out this improvement
one plate is made with a flange at its edge at right angles to its main part and which
overlaps the edge of the other plate, the extreme edge of which latter enters between
the flange and a rib formed on the former. Where the corner or angle formed by the

page_text: two plates is external the overlapping flange and adjacent parts may be easily made
ornainental. On the inner sides of the plates two or more pairs of locking devices
are formed, these consisting of hook-shaped snugs facing opposite ways on the two
plates. The inner sides of the hook jaws are wedge-shaped and each bears upon a
small rib formed on the side of the other snug. In putting the two plates together
one is moved towards the other in a position in which the snugs are just clear of each
other and then a short movement of one on the other parallel to the joint causes the
snugs to interlock and wedge each other.

page_text: COMPLETE SPECIFICATION.
Improvements in Cooking Ranges and Stoves or Fire Places.
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 this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, that is to say :-
My said Invention comprises improvements in cooking ranges and stoves or detached
fire places, and the said improvements are shown on a sheet of explanatory drawings
which is hereunto appended.
Figures, 1, and 2, are a front elevation and a vertical section of part of a cooking-
range oven door as made according to one part of my Invention. Figures, 3, 4, and 5,
are a horizontal section and two vertical sections as at right angles to each other
showing an improved ventilating valve detail for a cooking-range oven; and
figures, 6, 7, and 8, are a horizontal section and two vertical sections as at right
angles to each other showing an improved mode of forming the joint connecting any
two plates at right angles to each other in cooking range and stoves or fire places of
various kinds. In these drawings the same reference numerals are used to mark the
same or like parts wherever they are repeated.
One improvement relates to ovens of cooking ranges or of detached cooking stoves,
and consists partly in forming the oven door, 10, figures, 1, 2, with a perforated
ornamental panel, 11, and with a sheet, 12, of wire gauze enclosing a space, 13, on
the inside of the perforated panel, 11. The door is made with a rib, 14, projecting like
a frame on its inner side; and the sheet, 12, of wire gauze is stretched over this
rib, 14, and gripped between its outer side and a frane, 15, which is fixed to the
door, 10, by bolts or screws, 16. With this improved arrangement the interior of the
oven is ventilated in a superior manner, the air passing through the perforated
panel, 11, being uniformly distributed in passing through the wire gauze, 12, and
entering the oven at a temperature but little lower than that of the oven itself. The
ventilation is regulated by controlling the egress of the heated air from the oven, a
valve or valves being fitted for closing or more or less opening outlets, or both inlets
and outlets which, are provided at any suitable part or parts. Such air outlets are
by preference made along the top of the side of the oven further from the fire and,
in a cooking range lead into a flue formed behind the lateral closing plates. In
figures, 4, and, the section is as taken through the side flue referred to, and the top
outlet, 17, is shown open, a valve plate, 18, being provided for closing it more or
less. The valve plate, 18, is fitted to slide in guides formed for it on the plating of the
range or stove; and is moved by means of a forked lever arm, 19, which acts on a
pin cast or fixed on the valve plate. The lever, which is made with two arms, 19, 20,
is centered on a bracket, 21, and is moved by means of a handled rod, 22, jointed to it
and extending out through a slot in the front of the range or stove. The lower arm, 20,
of the lever operates simultaneously on a valve plate, 23, fitted to work in guides and

page_text: provided for more or less closing an opening, 24, which commuicates with a space
under the oven.
In carrying out my improved mode of making a joint between two range or stove
plates at right angles to each other, one plate, 25, figures, 6, 7, 8, is made with a
flange, 26, (seen only in figure, 6,) at its edge at right angles to its middle part, and
which overlaps the edge of the other plate, 27, the extreme edge of which latter,
shaped to fit inside the flange, 26, enters between that flange and a rib, 28, formed on
the plate, 25. Where the corner or angle formed by the two plates, 25, 27, is external
the overlapping flange, 26, and adjacent parts may be easily made ornamental. On the
inner sides of the plates, 25, 27, two or more pairs of locking devices are formed,
these consisting of hook-shaped snugs, 29, 3, facing opposite ways on the two plates.
The inner sides of the hook jaws of the snugs, 29, 30, are wedge-shaped and each
bears upon a small rib, 31, 32, formed on the side of the other snug. In putting the
two plates, 25, 27, together one is moved towards the other in a position in which the
snugs, 29, 30), are just clear of each other; and then a short movement of one on the
other parallel to the joint causes the snugs to interlock and wedge each other.
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-Making the door of the oven of a cooking range or stove with a perforated
outer panel and an inner covering of wire gauze substantially as and for the purpose
herein before described with reference to figures, 1, and 2, of the accompanying
drawings.
2-The arrangement of valve apparatus for the oven of a cooking range or stove
substantially as hereinbefore described with reference to figures, 3, 4, and 5, of the
accompanying drawings.
3-Forming the joint for connecting cooking-range or stove plates at right angles
to each other substantially in the improved manner hereinbefore described with
reference to figures, 6, 7, and 8, of the accompanying drawings.
Dated this Tenth day of January 1888.
EDMUND HUNT,
Applicant's Agent.