An Improvement in or appertaining to Stoves for Heating Rooms or the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improvement in or appertaining to Stoves for Heating Rooms
or the like.
I, JOHN ROBINSON CROSTIIWAITE, of The Union Foundry, Thornaby-on-Tees, in
the County of York, Iron Founder, do hereby declare the nature of this invention
to be as follows:-
This invention relates to stoves of the kind described or referred to in the
Specification annexed to the Letters Patent granted to me No. 17,170 of 1893
and comprises certain improvements as hereinafter described in the arrangement
and mode of operating the back hood in conjunction with an adjustable canopy.
In the construction described in my Specification No. 17,170 of 1893 a back
hood is provided as a fixture, the inlet to the chimney being between the stove
back and the bottom edge of the back hood, so that the said inlet is fully employed
in carrying off the products of combustion to the exclusion of fresh air from
the room.
With a bright clear fire this is both economical and preferable. But
when the fire is first lighted or fresh coals are put on and the volume of smoke
suddenly increased it is found desirable that the free access to the chimney
should not be altogether intercepted, but be opened directly above the fire to a
greater or less degree as required, the canopy being also set out more or less to
a corresponding extent. By my present invention I provide a simple, easily
worked and cheaply constructed arrangement by which to effect this object and
in which the back hood is hinged or pivotted to the wings of the canopy, the
back hood taking in cross section a straight, curved, or serpentine form with the
lower part heavier than the upper thereby imparting to it a constant tendency to
lean over away from the canopy leaving a direct passage up the chimney.
Above the line of the pivots on which the back hood is mounted, are provided
stop pins fixed into the stove side, wall, or permanent structure beyond or at
the outside of each wing of the canopy, the relative position of these stop pins
to the pivots being such that the back hood is always in contact with these pins
which limit to the extent required the tendency of the back hood to swing open
as the canopy is drawn out. The several parts concerned are so adjusted that when
the canopy is pushed to the most inward position the top of the back hood is
pushed up against it along its upper edge, and the only access to the chimney
is under the lower edge of the back hood as in the construction described in my
Specification No. 17170 of 1893. As the canopy is drawn out the top of the
back hood swings back away from the canopy, always in contact with the stop
pins, and access to the chimney is opened out between them to a greater or less
extent as desired.
From the foregoing description it will be seen that the canopy and back hood
have a combined movement controlled or regulated by the effect of the fixed or
stop pins and the relation in the movement of the one to the other is therefore

page_text: open to modification and adapted to be varied in practice according to the design
or intended use of the stove in question.
Dated this 6th day of May 1898.
G. J. CLARKSON,
Chartered Patent Agent,
Stockton-on-Tees and Hull, Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in or appe. taining to Stoves for Heating Rooms
or the like.
I, JOHN ROBINSON CROSTHWAITE, of The Union Foundry, Thornaby-on-Tees, in
the County of York, Ironfounder, 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 of the kind described or referred to in the
Specification annexed to the Letters Patent granted to me No. 17,170 of 1893;
and comprises certain improvements as hereinafter described in the arrangement
and mode of operating the back hood in conjunction with an adjustable canopy.
In the construction described in my Specification No. 17170 of 1893 a back
hood is provided as a fixture, the only inlet to the chimney being between the stove
back and the bottom edge of the back hood so that the said inlet is fully employed
in carrying off the products of combustion to the exclusion of fresh air from
the room.
With a bright clear fire this is both economical and preferable. But
when the fire is first lighted or fresh coals are put on and the volume of smoke
suddenly increased it is found desirable that the free access to the chimney
should not be altogether intercepted by such a deflection of the currents leading
into the chimney but be opened directly above the fire to a greater or less degree
as required, the canopy being also set out more or less to a corresponding extent.
By my present invention I provide a simple, easily worked and cheaply con-
structed arrangement by which to effect this object.
In the drawing hereto annexed I have illustrated in vertical sectional views
that part of a stove which embodies the essential features of my invention in
which Fig. 1 illustrates the canopy in the closed position and Fig. 2 in the open
position. The front canopy or curtain a and the back part 6 are of the ordinary
construction and arrangement and the precise form or design of the stove indicated
in the drawing is given for the purposes of illustration only. A convenient
means for making the canopy adjustable is that shown in section in both figures,
namely a joint formed by two circular and hollow recesses provided and fitting
together as described and illustrated in the Specification of my Letters Patent
No. 17,349 of 1896, but I do not confine myself to the use of that particular joint
in this case it being only essential that the canopy is adjustable in conjunction
with the back hood as hereinafter described. But according to my present inven-
tion the back hood c is hinged or pivotted at c¹ to the side wings a¹ of the canopy,
the back hood c taking in cross section a straight, curved or serpentine form with
the lower part heavier than the upper, thereby imparting to it a constant tendency
to lean over away from the canopy and leave a direct passage up the chimney.
Above the line of the pivots c on which the hood is mounted are provided stop
pins d projecting as fixtures from the stove side, wall or permanent structure
beyond or clear of each wing a¹ of the canopy, the relative position of these
stop pins d to the pivots c¹ being such that when the canopy is closed as in Fig. 1

page_text: C
the back hood is in contact with and tilted by these pins which limit to the extent
required the tendency of the back hood to swing open as the canopy is drawn out.
The several parts concerned are so adjusted that when the canopy is pushed to
the inwardmost position the back hood c is pushed up or tilted against it by contact
with the stop pins d as shown by Fig. 1, and the only access to the chimney is
under the lower edge of the back hood as indicated by the arrows and as described
in my Specification No. 17,170 of 1893. As the canopy is drawn out as shown
in Fig. 2 the top of the back hood c swings back away from the canopy, being
adjusted in its bearings and other respects to act as a balance weight to the canopy
in all positions so that access to the chimney is opened out between them to a
greater or less extent as desired.
From the foregoing descripton it will be seen that the canopy and back hood
have a combined movement balanced by adjustment and otherwise controlled or
regulated by the effect of the fixed or stop pins and the relation in the movement
of the one to the other is therefore open to modification and adapted to be varied
in practice according to the design or intended use of the stove in question.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
In the construction of stoves for heating rooms or for the like purposes the
use in combination with the usual adjustable canopy a of a back hood c pivotally
mounted in the side wings of the canopy and controlled by stop pins d fixed
in the stove side the adjustment of the several parts having the effect sub-
stantially as and for the purpose as hereinbefore described with reference to the
accompanying drawing.
1
.
6
1
1000
G. J. CLARKSON,
Chartered Patent Agent,
Stockton-on-Tees and Hull, Agent for the Applicant.