An Improvement in Stoves or Fire Grates.
Year: 1893

page_text: Date of Application, 13th Dec., 1893
Complete Specification Left, 12th Sept., 1894-Accepted, 20th Oct., 1894
PROVISIONAL SPECIFICATION.
An Improvement in Stoves or Fire Grates.
I FREDERICK CHRISTOPHER BERRY (trading as Thurkle and Company)
of Number 22 Denmark Street, Charing Cross Road London W.C. Electrical
Engineer do hereby declare the nature of this invention to be as follows:
My improved converter is for the purpose of converting ordinary firegrates or
stoves into slow combustion fire grates or stoves at will. For this purpose I have
devised an appliance made of iron or other suitable incombustible material
consisting of a frame at inside each end of which is attached (by means of a
hinge or hinges) a falling shutter, on the under portion of each of these falling
shutters is a supported movable plate which can be projected in the direction away
from the hinges of the shutter so that when so projected the shutter area is
increased. When the appliance is desired to be used for slow combustion the
shutters are pressed up to the frame and the plates of the shutters extended upon
the supports for them under each side of the frame, the falling shutters thus
meeting and being supported in position while in use.
By means of a piece of material projecting downwards from the movable plate
the shutters can be closed and fixed by raising them with a poker and then pressing
the projecting material on the plates towards the centre of the appliance. The
appliance can be fixed permanently under the firegrate or by means of holts and
nuts.
D 19th 1
1002
FRED. C. BERRY.
COMPLETE SPECIFICATION.
An Improvement in Stoves or Fire Grates.
I FREDERICK CHRISTOPHER BERRY lately trading as Thurkle & Co. at
22 Denmark Street Charing Cross Road London W.C. Electrical Engineer but
now of Laurel Cottage 7 Sydenham Road North Croydon in the County of
Surrey 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:-
My improved air supply regulator for stoves is for the purpose of converting an
ordinary firegrate or stove into a slow combustion firegrate or stove at will. For this
purpose I have devised an appliance made of iron or other suitable incombustible
material consisting of a frame at inside each end of which is attached (by means of
a hinge or hinges) a falling shutter.
On the under portion of each of these falling shutters is a supported movable
plate which can be projected in the direction away from the hinges of the shutter
so that when so projected the shutter area is increased.
When the appliance is desired to be used for slow combustion the shutters are
pressed up to the frame and the plates of the shutters extended upon the supports
for them under each side of the frame, the falling shutters thus meeting and being
supported in position while in use.
By means of a piece of material projecting downwards from the movable plate
the shutters can be closed and fixed by raising them with a poker and then pressing
the projecting material on the plates towards the centre of the appliance. The

page_text: appliance can be fixed permanently under the firegrate or by means of bolts and'
nuts.
In order that my invention may be easily understood and readily carried into
practice I will proceed to further describe the same with reference to the
accompanying sheets of drawings.
Figure 1 shows the plan end and side views of a frame F made of iron or other
suitable incombustible material underneath each side of the central portion of
which and extending to the same distance as the dotted lines, is a groove, a
section of which at 9 is shown, and in which runs a sliding plate hereafter
described. L are lugs for connecting the falling shutter hereinafter described to the
frame F.
At
Figure 2 shows the plan end and side views of the falling shutter along each
side of which are grooves G similar in section to those shown in g Figure 1 and at
the same distance apart and also co-extensive with the dotted lines shown.
one end are placed two lugs L bored to receive a pin or pins with which the falling
shutter is hinged to the frame by lugs L on the frame and at the lug end of the
falling shutter is a stop S¹ to prevent the sliding plate from sliding too far back.
Figure 3 shows the plan end and side views of the sliding plate P in the
underneath portion U of which is drilled a hole has shown in the side view, for the
purpose of fixing the hook hereafter described.
Figure 4 shows plan end and side views of the hook H which is for the purpose
of preventing the sliding plate from dropping out of the falling shutter when the
latter is in a perpendicular position or open, and which is fixed to the sliding plate
by means of a pin through the hole shown in Figure 3. When the falling.
shutter drops, the hook engages upon a staple or pin which latter may fasten the
falling sbutter to the frame, as shown in Figure 5 in which the hook is shown in
three different positions of the falling shutter. The square end of the hook must
be heavier than the hooked end. Such pin may be fixed in a boss or bosses
attached for the purpose upon the underside of the frame or preferably I may use
for the purpose the pin forming part of the hinge or hinges which connect the
falling shutter with the frame as shown in Figure 7.
Figure 6 shows by means of plan end and side views the manner in which the
sliding plate P fits into the grooves G on the falling shutter. The hook H is also
shown in position when the falling shutter is in a horizontal position or not
opened.
Figure 7 shows by means of plan end and side views the manner in which the
falling shutter S is fixed to the frame F by means of the lugs L in the frame
and L on the falling shutter and the pin P. This figure also shows one end of the
apparatus open admitting draught to the bottom of the grate.
Figure 8 shows the whole apparatus closed for the purpose of saving fuel by
excluding the bottom draught.
For certain purposes 1 may prefer to adopt one falling shutter and one sliding
plate with or without the device for manipulating the same shown in Figures 9, 10,
11, 12, 13 and which I now proceed to describe.
Figure 9 shows the plan end and side views of an alternative frame F' on the
under side of which at A is shown the support for one end of the catch herein.
after described for supporting the falling shutter when closed.
strengthen the apparatus.
is a rib to
Figure 10 shows the plan end and side views of the falling shutter on the under-
side of which at B is shown a lever for the purpose of closing the falling shutter
and to which lever is attached one end of the catch hereinafter described. In all
other respects this falling shutter is similar to that shown in Figure 2.
The sliding plate used in connection with this falling shutter is similar in design
to that shown in Figure 3.
Figure 11 shows the plan and side view of the catch for supporting the shutter
shown in Figure 10 and which is attached at B to the lever shown at B
Figure 10 and in which the portion B B' is used for the purpose of exerting power

page_text: on the lever B Figure 10 and the portion C D is the catch pinned loosely at C
on to the portion B B and which catch when pulled forward by means of the
portion B B for the purpose of closing the falling shutter drops by its own weight
on to a pin provided for the purpose in the support A Figure 9.
Figure 12 shows the position of the catch when the falling shutter is open.
Figure 13 shows the position of the catch when the falling shutter is closed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The falling shutter (or shutters) with or without the lever and catch described
and shown in Figures 9, 10, 11, 12, 13.
2. The sliding plate (or plates) together with the hook engaging upon a staple or
pin in the frame as hereinbefore set forth and shown in Figures 4, 5, & 6 in
combination with the falling shutter.
3. The combination in improved draught regulators or slow combustion plates
for stoves or firegrates of Claim 1 with Claim 2 with a frame substantially as
described and shown in Figures 1 or 9.
Dated this 12th day of September 1894.
FRED. C. BERRY.