Year: 1896

page_text: I JOHN EYRE RUSSELL, Ironfounder, of Peel Foundry, Derby, in the County
of Derby, do hereby declare the nature of this invention to be as follows:-
This invention relates to that class of cooking ranges commonly known as
lifting fire-ranges.
The object of this invention is to dispense with the pawl and rack generally
used to sustain the bottom grate at varying heights, and the invention consists in
the means whereby the bottom grate is made self-sustaining at any height.
In carrying out this improvement, I provide, on the two side plates, and below
the fire, two inclined ledges or flanges. Working upon this incline is a weighted
plate provided at its front corners with curved horns, lugs, or projections. This
plate is sufficiently heavy to prevent the bottom grate forcing it up the incline
without external pressure, as will be hereafter explained.
To the underside of the bottom grate I attach two curved legs or projections,
which pass in front of the horns or projections on the metal plate, and against
which legs, by means of the horns, the full weight of the plate presses. The front
edge of the bottom grate works against the front fire frame, at or near the back
of which is formed a radius along which the front of grate works when raised or
lowered. The back of the bottom grate rests on two lugs, which are on the top
of the side plates under the fire.
The manner of working is as follows:-
When the front of bottom grate is raised, the metal plate underneath slides down
the incline, pressing against the two legs under the bottom grate, and keeps the
grate stationary, at any desired height, by the friction of contact. When the
front of bottom grate is lowered, it is necessary to use a slight pressure at
the front of grate, to enable the legs underneath to push the metal plate back up
the incliue. For the purpose of raising or lowering the bottom grate, I use either
a lever or the bracket table, as shown and described in the Specification of. my
Patent No. 1161 of 1895.
Although I mention an incline on which the weighted plate slides, the same
effect could be accomplished by a plate sliding on level or curved ledges or flanges,
a slight modification in the construction only being necessary to bring the
pressure on the plate so as to operate ou the bottom grate.
Dated this 29th day of June 1896
NEWTON & SON,
Agents for the Applicant.

page_text: .
1, JOHN EYRE RUSSELL, Ironfounder, of Peel Foundry, Derby, in the County
of Derby, 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 that class of cooking ranges commonly known as
lifting fire ranges.
The object of this invention is to dispense with the pawl and rack generally
used to sustain the bottom grate at varying heights, and the invention consists in
the means whereby the bottom grate is made self-sustaining at any height.
In carrying out this improvement, I provide, on each of the side plates of the
fireplace, and below the bottom grate, an inclined ledge or flange. Working upon
these inclines is a metal plate, which may be provided with curved horns, lugs, or
projections. This plate is sufficiently heavy to prevent the bottom grate forcing
it up the incline without external pressure, as will be hereafter explained.
To the underside of the bottom grate, I attach two curved legs or projections,
which are arranged to pass in front of the metal plate, so that the full weight of
the plate will press against them. A shoulder on each side of the bottom grate,
near to its front edge, works against a curved portion of the front fire frame,
when the grate is raised or lowered. The back of the bottom grate rests on two
lugs on the side plates of the fireplace.
The manner of working is as follows:-
When the front of bottom grate is raised, the legs are, so to speak, more or less
withdrawn from contact with the metal plate, and allow the metal plate to slide
down the incline by its own weight, that is to say, the plate follows the movement
of the two legs under the bottom grate, and thus the grate is kept stationary, at
any height to which it may have been moved by the friction of contact. When
the front of bottom grate is to be lowered, a slight pressure at the front of grate
causes the legs underneath to push the metal plate back up the incline. For the
purpose of raising or lowering the bottom grate, I use either a lever or the
bracket table, as shewu and described in the Specification of my Patent No. 1161
of 1895.
In the accompanying drawings
Fig. 1 is a front view of the fire place of a cooking stove; Fig. 2 is a plan
view, partly in section;
Fig. 3 is a longitudinal sectional elevation of the fire place;
Fig. 4 shews the improvement in front elevation, &
Fig. 5 is a plan view of the sliding weighted plate.
.
The general construction of the cooking stove is the same as that described in
the Specification of my Patent No. 1161 of 1895 before referred to, with the
exception that the table A is not attached to the bottom grate, so as to act as
the lifting lever, but is formed with two prongs, A', A', which are inserted through
holes A2, A3, formed in the fret A³ to receive them.
I may however remark, that I may use the present improvements in supporting
or sustaining the bottom grate with the old form of bottom grate and lifting table,
as shewn in the said patent.
. B is the bottom grate, which is formed with the shoulders B B₁ at either
side, for a purpose to be presently explained, and with, say, two legs or
projections B on the underside.
Care ledges or flanges secured to the side plates of the fire-place, and upon
these ledges slides the plate D.

page_text: This plate, which may be of cast metal, consists, as shown in the drawing, of a
main casting D, side pieces D', which rest upon and slide on the ledges C, and
curved horns or surfaces D³.
The curves of the inner side of the legs B, and of the faces of the horns D2,
will be so regulated, that when the grate B is in its highest position, as seen by
the full lines in Fig. 3, the plate D will be allowed to slide down the incline to
its lowest position, to keep in contact with the legs, and when the grate B is
down, the plate D will be forced back up the inclines, as seen by the dotted
position Fig. 3.
The weighted plate D, pressing against the legs B³, will tend to push the
bottom grate outwards, and draw the back off the lugs, which support it, and this
tendency must be overcome. For this purpose, the shoulders B₁ before referred
to are provided, such shoulders bearing against the inner edge of the front fire
frame E, which is curved to the radius in which the bottom grate will move
(see Fig. 3). Thus, it will be seen that the weighted plate D will press the
bottom grate against the curved faces of the fire frame, so that the bottom grate
will be held in the desired position by friction of contact.
I would here remark that the weighted plate sliding on the inclined ledges, is
the arrangement which I prefer, but it will be obvious that the same effect may be
produced by having the ledge horizontal, and the bottom grate arranged to slide
the plate backwards & forwards.
Also, that the legs of the bottom grate may rest against the edge of the plate,
instead of against the curved horns or projections.
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. Supporting the bottom grate at any desired height by friction of contact,
produced by a movable or sliding weight or plate operating on the bottom
grate.
2. A sliding weight mounted on an incline, and operating on legs or projections
formed on the bottom grate.
3. The means substantially as herein shewn and described for supporting the
bottom grate at any desired height, as set forth.
Dated this 11th day of March 1897.
NEWTON & SON,
Agents for the Applicant.