IMPROVEMENTS IN THE CONSTRUCTION OF ROTARY OR REVERSING FIRE-GRATES, APPLICABLE TO ALL KINDS OF FIRE DAMES Οπότες DANGD all Kinng op FidE ADAMES, STOVES, AND RANGES,
Year: 1873

page_text: LETTERS PATENT to Stephen Barber Hewett, of Marlborough, in the
County of Wiltshire, Engineer, for the Invention of "IMPROVEMENTS
IN THE CONSTRUCTION OF ROTARY OR REVERSING FIRE-GRATES, APPLICABLE TO
ALL KINDS OF FIRE DAMES Οπότες
DANGD
all Kinng op FidE ADAMES, STOVES, AND RANGES,”

page_text: Her Royal Letters Patent for the same, and have made solemn
Declaration that I am the true and first Inventor thereof.
NOW KNOW YE, that I, the said Stephen Barber Hewett, do hereby
declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the said Invention,
and in what manner the same is to be performed, in and by the
following statement, reference being had to the Drawings hereunto
annexed, and to the letters and figures marked thereon (that is to
say) :-
My Invention of "Improvements in the Construction of Rotary or
Reversing Fire-grates, Applicable to all Kinds of Fire-grates, Stoves,
and Ranges," and of which Figure 1 is a front elevation, shewing how
it can be applied to a register stove or range; Figure 2, a side
elevation, shewing the rotary or reversing grate more particularly; and
Figure 3, a front elevation, shewing how the bearings may be at front.
and back instead of at the sides of grate, as in Figures 1 and 2; and in
all which Drawings the same letters represent the same or corresponding
parts, are as follows:-
A, A, A, represent the cast-iron sides of the rotary grate, which can
be of this or any other suitable shape, and perforated with taper or
upward inclined holes for admission of air and prevention (in degree) of
waste of fuel. B, B, B, is the cast-iron back plate, of this or any other
suitable shape, and to be fastened to the two sides by projections cast
on them, or by separate angle irons, and it may be perforated or have
slots or square holes through it, and a gridiron cover M sliding in
direction of the bearings I, I, to open or close these air holes, and so as
to remain by gravity wherever placed. C, C, C, the grate bars, which
can be as shewn or of any usual kind in cast or wrought iron, and
rivetted to the sides or fixed in any other usual way. D, D, one half
of the bottom of grate fastened to the sides in any usual way, and with
openings to admit air, as shewn by direction of the arrow in Figure 1;
but with inclined projections cast on the top, and a cover plate or
grid e, e, rivetted to D, or loose to prevent (in degree) the waste of small
coal and plate D extends downwards to have the handle J strongly
secured to it. E is the other part of the bottom, which is also the door,
fitting loose in grooves, and to be slid out to admit fuel when required,
and closes and stays in position by gravity alone. F is a moveable (but

page_text: fixed where essential) gridiron top of cast, malleable, or wrought iron,
with holes or slots through it for gases and ashes to escape, and heat
also to the cooking utensils resting on it. F has a recess for tongs to
seize it fast to put it in or out of the grooves G, G, in which it is held
by gravity only. H, H, is the bearing block or bar of any kind of
suitable iron or shape, to be either cast on or rivetted to the fixed part
of grate and on which the grate rests and turns, and which may have
three bearing holes in it to allow grate to be brought further out into
the room if required. I, I, are the bearings on which grate turns; but
for office stoves and ranges the right hand bearing may be continued
to the outside of the stove or range, and the handle made fast to it, and
stops rivetted to the outer stove case, and any other parts requiring
it modified to suit this kind of arrangement. J, J, is the handle by
which grate is turned round to put in fuel or clear fire of ashes, &c.,.
and may serve other purposes, as to hold the grate fast in both of its
positions and fasten an oven or other door when in position, as shewn.
by full lines in Figures 1 and 2, and which handle when turned as
shewn by the dotted lines, Figure 1, can by its other end hold the
moveable top F fast while turning grate upside down and back again,
through gravity will hold F fast if the back of grate is suitably made,
while with a piece of sheet iron rivetted on, as shewn by L in red ink
lines, the handle on being turned round would enclose the front; this
handle therefore would require to be strongly made and fixed as shewn
in Figures 1 and 2, turning on the strong pin S or in any other usual
way, as different kinds of grates, stoves, and ranges would require; or this
handle F might be rivetted fast to the grate and serve as a support or
fastening, and a bolt or catch N, Figure 1, on the fixed frame used to
hold the grate fast in any required position. This rotary grate can be
made to have the appearance of ordinary grates, to have fire-clay lumps
at the back, and other usual grate appendages; and can be used either
as a rotary or fixed grate, and as an open fire or close stove. To put
more fuel on the fire put F lower or higher, as required, then turn down
handle J, then turn grate upside down, then with shovel push back
slide or door E, then throw in fuel, and then turn handle back again,
the slide E closing and all being held fast by gravity; or the grate can
be used upside down as a close stove.

page_text: case a strong single or double bearing must be behind, and the inch.
thick bearing bar H of any suitable pattern in front, with its boss or
projection fitting into the recess of the fire-bar C, as shewn in section in
Figure 4, in which case the position of handle J must be as thero
shown, and the other parts requiring it modified to act on the same |
principles as in Figures 1 and 2.
And having now described the nature of the said Invention, and the
manner in which the same is to be performed, I would have it
understood that as far as I legally can do so I claim the improvements
in rotary or reversing fire-grates, as herein-before described, that is to
say:―
First. I claim the bottom plate D, D, Figures 1 and 2, to admit air
and prevent waste of fuel, as herein-before described.
Second. I claim the other part of bottom E, being the sliding door to
admit fuel, as herein-before described.
Third. I claim the moveable gridiron top F, as herein-before
described.
Fourth. I claim the handle J, J, and the various fixings and stops
N, P, &c., to turn and fasten the grate, as herein-before shewn and
described.
Fifth. I claim the kind of bearings and bearing bars H and C,
Figures 1, 2, and 3, as herein-before described.
Sixth. I claim the modification of parts D, E, J, H, M, C, &c., Figures
1 and 2, to allow the bearings to be at back and front of grate as in
Figures 3 and 4, as herein-before described.
In witness whercof, I, the said Stephen Barber Hewett, have
hereunto set my hand and seal, this Sixteenth day of May in
the year of our Lord, One thousand eight hundred and seventy-
three.
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