A NEW MODE OF CONSTRUCTING AND MOVING THE BACK AND, BOTTOM OF FIRE GRATES, COMBINED WITH CHEEKS ON A NEW CONSTRUCTION WHICH IS PARTICULARLY ADAPTED FOR KITCHEN RANGES, AND CAN BE APPLIED TO OTHER GRATES, BY WHICH A GREAT SAVING OP FUEL WILL BE OBTAINED
Year: 1799

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ANTHONY
GEORGE ECKHARDT, of Queen's Buildings, Knightsbridge, Gentleman, Fellow of
the Royal Society, send greeting.
71.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Third day of October, in the thirty-ninth year of His reign,
give and grant unto me, the said Anthony George Eckhardt, His especial
licence that I, the said Anthony George Eckhardt, during the term of years
therein mentioned, should and lawfully might use, exercise, and vend, within
England, Wales, and the Town of Berwick-upon-Tweed, my Invention of "A
NEW MODE OF CONSTRUCTING AND MOVING THE BACK AND, BOTTOM OF FIRE GRATES,
COMBINED WITH CHEEKS ON A NEW CONSTRUCTION WHICH IS PARTICULARLY ADAPTED FOR
KITCHEN RANGES, AND CAN BE APPLIED TO OTHER GRATES, BY WHICH A GREAT SAVING
OP FUEL WILL BE OBTAINED;" in which said Letters Patent there is contained
a proviso obliging me, the said Anthony George Eckhardt, by an instru-
ment in writing under my hand and seal, to cause a particular description
of the nature of my said Invention, and in what manner the same is to be
performed, to be inrolled in His Majesty's High Court of Chancery within one
calendar month after the date of the said Letters Patent.
NOW KNOW YE, that in compliance with the said proviso, I, the said Anthony
George Eckhardt, do hereby declare that the nature of my said Invention,
and the manner in which the same is to be performed, is particularly described
and ascertained in the Drawings hereunto annexed, and in manner and form
following (that is to say) :-

page_text: My Invention consists in having discovered a new mode of moving the back
or back plate or plates of fire-grates of all descriptions, and to move it or them
on a spindle or on spindles, instead of moving them in a parallel direction, either
in a vertical or horizontal direction, by a winch or crank; the back plate or
plates are made to move towards the bars or from them, so as to admit of more
or less fuel, according to circumstances, when more or less heat is necessary.
Fig. 1, 2, 3, 4, 5, 6, and 7, represent in how many modes the spindle or
axis may be applied to the back plate or plates.
Fig. 1 and 2 is a side view.; A, B, represent the back of the fire-grate;
B, D, the bottom; and C, D, the front bars of the grate. In Fig. 1 the back
is made to move on a horizontal axis or pivot underneath, marked by a little
circle B; and the dotted line A, C, represents the movement. In Fig 2, A, B,
is again the back, and C, D, the front bars, and in that the back plate is made
to move by a horizontal spindle on the top marked A; and the dotted line B, D,
represents the movement.
Fig. 3' represents the same construction, only with this difference; that the
back is fixt to the bottom, and moves together on a horizontal spindle or axis,
marked by the little circle D.
26.
事
"
In Fig. 4 the back is made to move the same as in Fig. 2, but the bottom
B, F, is made to move on a false bottom E, D. In these Figures 1, 2, 3, 4, the
back
may be made to move without pivots, by rounding the bottom edge either
or without a groove, and I claim the right of making them in that way, as
well as to act on pivots.
Fig. 5 represents a top view of the fire-grate; A, B, the back, and D, C, the
front bars of the grate; the back is made to move on a vertical axis or pivot B
on one side, which may also be applied to the other; and the dotted line D, A,
represents the movement.
.
Fig. 6 and 7 represent the back in two plates, each moveable on a vertical
axis marked B, B, and B, the one in Fig..6. The back is made-to-move
on an axis or spindle on each side; and in Fig. 7. on an axis or spindle in the
middle. .
This all being well understood; it will be easy to conceive that the mode
of moving the back or back plates on those spindles may be done in various
ways, by racks or wheels and pinions, or by worms, or by levers, or compound
together all which applications I claim the right of, as the construction of
them must be according to circumstances: With respect to the application for
kitchen ranges, the mode of Fig. 1, 2, 3, and 4 is the most applicable for that
purpose; then, in order to admit checks as in common, my Invention is to
make them, instead of one, to consist of two or more pieces or plates connected

page_text: together with an axis or pivots, moveable like a fan, so as to fit at any position
of the back plate.
In respect to the front bars, Figs. 8 and 9 represent a side view of those
cheeks, made of two pieces, in the fire-grate; A; B, represents the back
plates, and C, D, the front bars, and the cheeks are represented by two
plates a, a, & b, b, moveable on a centre marked d. These cheeks are also
made to wind in the usual manner, and they may be made applicable to all the
before-mentioned cases.
I have not delineated in the nine preceding Figures the mode of moving
the back plate or plates and cheeks, in order to prevent confusion; but by way
of example I annex a Drawing, showing how the principle may be applied to
kitchen ranges. To delineate all the-modes would be too-prolix,-and-it-must
be left to any fone conversant in machines to make use of the several modes
according to circumstances.
: יינין
DESCRIPTION OF THE KITCHEN RANGE.
"
As the principle of my improvement is sufficiently, described, and several
parts in this fire-grate are like those in common use, a minute description
will be unnecessary. Fig. 15 represents the front view, 17 the back, 10 and 16
the side view. In these Figures D, E, represent the front bars of the grate;
Fig. 10 and 15, L and L are the hobs; M and M. are the figured fronts:
In this construction the back is made, in two pieces; the top, one, I, K,, in
Figure 10, and I, I, K, Figs. 15 and -17, is fixed, as a common, back; the
other, A, B, Fig. 10, A, Fig. 15, and A, A, B, Fig. 17, is fixed to the grating
bottom C, C, by three small plates, 'ef, ef, ef, Fig. 17, thereby constituting
one piece, and may be cast in one together; this back and bottom is made
moveable on two horizontal pivots, G and G, Fig. 17, and by G, Figs. 10
and 16. To this back plate is put a circular iron plate A, g, Fig. 10,
which prevents the fuel falling behind when the back is moved forward.
N, N, N, O, Fig. 10, and N, N, N, O, Fig. 15, are the cheeks of the grate,
made in two pieces, connected together by a pivot and made moveable
like a fan; the shape of each piece is described in Figs. 10, 11, 12; the back
one, N, A, O, Figs. 10 and 12, is fixed to the moveable back by a screw and
nut 1, Figs. 10 and 12; the other part, N, N, O, Figs. 10 and 11, is fixed to
the front bars by a hook n, Figs. 10, 11, 15. These cheeks are made to move
in a horizontal direction, like the common cheeks, so as to contract or enlarge the
space of the fire-grate. The mode of moving these cheeks is the same as is
practised in common by a rack pinion, &c. &c. worked by a crank. In order
to move the back and grating bottom forward or backward, I have established a

page_text: lever T, U, Fig. 17, at the back of the grate; the fulcrum m is supported on the
carriage R, R, and S, S, Figs. 14, 16, 17; on the extremity of this lever is a
hook T, Figs. 14, 17, which takes hold of the back by means of a staple W,
Figs. 14; 17; and to move the said lever with solidity and power I have
contrived a tooth wheel, X, X, Fig. 13, 14, 16, which is made moveable by a
worm Z, Z, same Figs.; to this wheel is fixed a short lever Y, Y, Y, same Figs.,
or may be cast with the wheel, so that when the crank or winch Q, Figs. 14, 15,
turns the worm, the wheel is moved, and consequently lowers or raises the
short lever Y, Y, Y, which being connected to the long lever at U, Figs. 14, 17,
lowers or raises that lever at one end, and raises or lowers the back and
grating bottom at the other end.
In witness whereof, I, the said Anthony George Eckhardt, have hereunto
set my hand and seal, this Second day of November, in the year of our
Lord One thousand seven hundred and ninety-nine..
T. WALKER.
AND BE IT REMEMBERED, that on the same Second day of November
in the year above mentioned, the aforesaid Anthony George Eckhardt came
before our Lord the King in His Chancery, and acknowledged the Specifica-
tion aforesaid, and all and every thing therein contained, in form above written.
And also the Specification aforesaid was stamped according to the tenor of the
Statute in that case made and provided.
Inrolled the same Second day of November; in the year above written.