FIRE EXTINGUISHER AND FIRE GUARD
Year: 1794

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
KEYLOCK the younger, of Hatton Garden, in the Parish of Saint Andrew,
Holborn, in the County of Middlesex, Gentleman, send greeting..
WHEREAS His most Excellent Majesty King George the Third, by His
Royal Letters Patent under the Great Seal of Great Britain, bearing date on
or about the Sixteenth day of August, in the thirty-fourth year of His
said Majesty's reign, did give and grant unto me, the said John Keylock
the younger, my executors, adiñiors, and assigns, His especial licence, full power,
sole priviledge and authority, that I, the said John Keylock the younger, my
executors, admors, and assigns, and every of them, by myself and themselves,
or by my and their deputy or deputies, servants or agents, or such others
as I, the said John Keylock the younger, my executors, adñiors, or assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term of years therein expressed, should and lawfully
might make, use, exercise, and vend my new invented "FIRE EXTINGUISHER
AND FIRE GUARD," within that part of His Majesty's Kingdom of Great
Britain called England, His Dominion of Wales, and Town of Berwick-upon-
Tweed, in such manner as to me, the said John Keylock the younger, my
executors, adñiors, or assigns, or any of them, should in my or their discretions
seem meet; in which said in part recited Letters Patent is contained,
amongst other things, a proviso obliging me, the said John Keylock the
younger, to particularly describe and ascertain the nature of my said Invention,
and in what manner the same is to be performed, by an instrument in writing
under my. hand and seal, and to cause the same to be inrolled in His Majesty's
High Court of Chancery within one calendar month next and immediately
"

page_text: after the date of the said in part recited Letters. Patent, as in and by tho
same, reference being thereto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Keylock the younger, do hereby declare that my said new invented
Fire Extinguisher and Fire Guard is described, used, exercised, and per-
formed in manner following, that is to say:-
The fire is enclosed in one sliding box by the drawing together of the two
sections thereof, which sections or sliders when undrawn and not in action are
concealed, one on each side, behind the side plates of the said stove, from A
to A, and from B to B, Figure 1, cach slider consisting of four plates of any
metal joined together, viz., one for the top, one for the bottom, oue for the
front, and one for the side, ns A, B, C, D, Figure 4, which is a side view of
one of the sliders B, Figure 2; or of only three plates, as A, B, C, of the same
Figure 4, when the checks of the stove are to answer the purpose of D, in the
same Figure 4, which sliders, when drawn together, form with the back a box,
and compleatly conceal the whole fire. Figure 2 represents the situation of
the sliders in the inside front of a double barr'd stove, when the outside front
of the stove is taken off, where it appears that B, B, are the fronts of the two
sliders; C, C, C, C, the back barrs, before which the sliders are to proceed to
meet each other and oncompass the barrs, and thereby enclose the fire; the
channel through which the sliders proceed in front are between the two setts of
barrs, the tops between the hobbs D, D, and the checks E, E, Figure 2, and
the bottom between the side pieces, and the checks of the stove; the sides of
the sliders have nothing to oppose their motion, as they don't come pass the
check. The sliders act in the single bar'd stove in like manner, that is to
say, the channel for the drawing the sliders out must be in the same manner
between the barrs and the sides plates A to A, and B to B, Figure 1, as they
are between the two sets of bars in the double barr'd stove, and the bars with
the fire are thereby enclosed in the same manner as the inside barrs of the double
barr'd stove, or the channels are also made in the single barr'd stove close bebind
tho barrs, so as that the sliders may make their way between the fire and the
barrs. When the sliders are to act only as a fire guard, they are to be drawn out
to any necessary nearness to each other, so that the fire may, notwithstanding,
be preserved by the draft of air remaining, and rooms may be thereby left
with a fire in them with safety; and in a ship, the fire may be kept in altho'
the weather may be so turbulent as to render it not safe to continue to keep a
fire therein without such a fire guard; and a room may be hereby also much
cooled at pleasure.
The action upon and motion of the said sliders from and to their
recess are effected by the several methods herein-after described :-By the

page_text: power of racks and wheel the sliders are acted upon, which racks.are
represented by F, F, Figure 2, as they are connected with each other, the
one banging so far lower than the other, with the teeth in opposition to each
other, so as to admit the action of a tooth wheel in center between them, the
end of the axle of which wheel is represented by G, Figure 2, coming
through the center of the outside plate of a metal case, represented by H, H,
Figure 2, which includes and keeps from dust the said wheel, with other
appurts to facilitate the motion, shewn by Figure 6, which represents the same
case on a larger scale with the front plate taken off, of which A, A, are the
two side extremeties; B and C, the top and bottom; D, D, D, D, four metal
rollers fixed by and freely spinning round their seperate spindles, which are
connected with the back and front plates of the said case, and which rollers
have a small groove round the circumference, by which they serve both as a
guide to the rack, passing and thereby taking off the friction of the racks, and
render that part of the motion easy when acted on by the rotation of the wheel
in the center of the case E, which by a winch or winder applied to the axlo
which appears in the center of the fret-work. When the little ornament in the
center of the fretwork, shown by C, C, on it and C under it, Figure 1, is moved
on one side, doth in a few turns or rotations draw together the two sliders
which are fixed to and connected with the racks, as shewn by Figure 6; but
that the barr which connects the slider to the rack F, Figure 6, should not
oppose the motion of the rack G, Figure 6, it is either connected with the
slider so far back as to admit of the passage of the other before it, and then
bent so far backwards under the other rack as to come to its proper channel
in the case, as represented by E, Figure 4, or the connecting barr of this rack
hangs as the other barr of the other rack; only then it is wide enough to admit
of a hole through it big enough for the other rack to pass through it; one side
of the top bar, to which the said case is connected, shewn in Figure 6, from
H to H, is also bent so far back as to admit the connecting bar G, in the
same Figure 6 to pass before it; the fronts of the sliders are supported
by the said racks, the backs are also supported and their actions facilitated
by the methods herein-after set forth; at each corner of the top plate of
the sliders are fixed an easy moving roller, as O, Figure 4, which when
they are made to project from the extreme end of the sliders a' proper grove
is cast on the back of the stove for their reception, as A, Figure 3, which
Figure is a side view of the back, on the scale of the other stoves; but in
Figure 4 this grove is represented by G, on a larger scale, in which groove are
fixed two proper rabbits, as I, I, Figure 4, to fill up or fit the groves cast in
the circumference of the roller O in same Figure 4, and on which the rollers
run in the motion of the sliders; and the front of the cavity of the
grove G is

page_text: either covered over or filled up with plates to preserve the inside, as K, K, but
when they do not project the rollers are acted on by a rabbit fixed on the back
of the stove in the same manner as the roller at the corner of the bottom plate
of the slider, as shewn by II, Figure 4; these sliders are therefore eased from
their friction in this manner, either by having two rollers at the top, two nt the
bottom, or by having two at the top and two at the bottom also, and the rabbits
on which they run are either fixed at the back of the stove, as the bottom
roller described by H, Figure 4, or projected in a proper grove cast in
the back as 'the top roller, as before described, or one in each way, shown in
Figure 4; or the motion is also effected as shewn in Figure 5, where A is
part of the top side piece of the stove, under which the slider moves, and B, B,
two rollers fixed in the said side, and C part of the slider under it, which
moving under those rollers are thereby eased from friction; the same sort of
rollers may be added also at bottom, acting in like manner, being fixed to the
bottom side piece of the stove in the same manner as the others are fixed to
the top. Instead of the rollers being fixed to the sliders as before described, or
in single bar'd stoves, where the bars and the fire are to be both inclosed, the
motion is also effected by a handle made and affixed to the side of the front
plate of each slider, by which the sliders are drawn out without the assistanco
of the rack and wheel.
In witness whereof, I, the said John Keylock, have hereunto set my
hand and seal, this Twenty-ninth day of August, in the thirty-fourth
year of the reign of King George the Third, and in the year of our
Lord One thousand seven hundred and ninety-four.
JOHN KEYLOCK, Ju* (L.S.)
AND BE IT REMEMBRED, that on the Twenty-ninth day of August, in
the year of our Lord 1794, the aforesaid John Keylock came before our
said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stampt according to
Statutor