IMPROVEMENTS IN STOVES AND FIRE-PLACES
Year: 1868

page_text: LETTERS PATENT to Thomas Nash, of No. 134, Great Dover Street,
in the County of Surrey, for the Invention of "IMPROVEMENTS IN
STOVES AND FIRE-PLACES."
Sealed the 14th July 1868, and dated the 16th January 1868.
PROVISIONAL SPECIFICATION left by the said Thomas Nash at
the Office of the Commissioners of Patents, with his Petition, on
the 16th January 1868..
I, THOMAS NASH, of No. 134, Great Dover Street, in the County of
Surrey, do hereby declare the nature of my said Invention for
"IMPROVEMENTS IN STOVES AND FIRE-PLACES," to be as follows:-
My Invention relates to the improved construction of stoves and
fire-places, and has for its objects the prevention of down draughts,
the diminution or prevention of smoke, and the economising of fuel,
while at the same time by my peculiar construction or arrangement of
the upper part of my improved stoves or other fire-places the soot is
prevented from accumulating, and thereby the danger of the soot in

page_text: the lower part of the chimney taking fire is entirely obviated, the
soot being received into a chamber and destroyed as herein-after
explained.
My Invention consists in constructing or providing stoves or other
fire-places at their back with a hollow hot-air chamber or receiver,
which extends from the soot door downwards in the direction of the
ash-pit. This chamber or receiver is open at the top. The soot door
instead of being provided with a smaller door has at or about the same
place as this door is usually placed an opening, into which is fitted
a bent tube or hollow piece forming a passage of circular or any
convenient section; this tube or passage rises from the soot door and
curves over into the hollow hot-air chamber or receiver, into which it
dips or enters for a few inches. This tube or passage is open at both
ends, so that all smoke from the fire must pass through the tube or
passage into the hollow hot-air chamber or receiver, where it or the
greater part thereof will be consumed. It will be obvious also that
from the position of the tube or passage that no down draught can
take place so as to cause smoke in the apartment, as the bent tube
or passage forms the only communication between the hollow hot-air
chamber or receiver and the space immediately over the fire. It follows
also that all soot must find its way into the hollow hot-air chamber
or receiver, and will be there or the greater part thereof burned or
consumed. At the lower part of the hollow chamber is a slide or door
by which the unconsumed remains from the soot may be removed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said Thomas Nash in the Great Seal Patent Office
on the 15th July 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I; THOMAS
NASH, of No. 134, Great Dover Street, in the County of Surrey, send
greeting.
3
WHEREAS Her most Excellent Majesty, Queen Victoria, by Her
Letters Patent, bearing date the Sixteenth day of January in the year
of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Thomas Nash, Her special licence 3

page_text: that I, the said Thomas Nash, my executors, administrators, and
assigns, or such others as I, the said Thomas Nash, my executors
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
5 therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
STOVES AND FIRE-PLACES," upon the condition (amongst others) that I,
the said Thomas Nash, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Thomas Nash, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement.:-
My Invention relates to the improved construction of stoves and
other fire-places, and lias for its objects the prevention of down
draughts, or smoke or foul air returning into the apartment, the
diminution or prevention of smoke, and the economising of fuel,
while at the same time by my peculiar construction and arrangement
of the upper part of my improved stoves or other fire-places the soot
is prevented from accumulating and thereby the danger of the soot in
the lower part of the chimney taking fire is obviated, and any soot
received in the chamber hereafter described is destroyed.
I construct stoves and fire-places with certain smoke consuming and
combustion arrangements herein after described; that is to say, at the
back of the stove or fire-place I have a hot-air chamber or receiver
which extends downwards in direction of the ash-pit, as herein-after
described and illustrated by the Drawings. This chamber or receiver
is in direct communication with a pipe or hollow piece forming a
passage of circular or any convenient section, or the stove or grate
may be cast or made in such manner that the passage is thereby
formed therein, such passage opening into the top of such chamber or
receiver and the chamber. or receiver itself opens at its upper part to the
chimney. The soot door instead of being provided with an smaller door,

page_text: as in ordinary register stoves, has at or about the same place an opening
which may be fitted with a door valve, and into which opening is fitted
the tube or hollow piece forming the passage as aforesaid, and this
tube or passage curves over or is carried down dipping into the afore-
said hot-air chamber or receiver, as is hereafter particularly described
and illustrated by the Drawings. Or this passage may be made at the
back of the fire-place and above it so as not to interfere with the soot
door. It will be. evident from the above statement that the smoke
from the fire passes through the tube or passage where consumption
of smoke will take place. It will be obvious also that from the
position of the tube or passage no down draught can take place so
as to cause smoke in the apartment, as the said tube or passage forms
the only communication between the hollow hot-air chamber or receiver
and the space immediately over the fire. It follows also that all soot
must find its way into the hollow hot-air chamber or receiver, and
will be there, or the greater part thereof, burned or consumed. At
the bottom of the hollow chamber is a slide or door by which the
unconsumed remains from the soot may be removed.
In order that the nature of my said Invention, and the manner in
which the same is to be performed may be clearly described and
ascertained, I accompany this Specification with a Sheet of Drawings,
having figures and letters of reference marked thereupon, the like
letter being used to denote a similar or corresponding part at each of
the Figures respectively.
In these Drawings Figure 1 is a front view; Figure 2 is a section
through the lines A, B, Figure 1; Figure 3 a side view, Figure 4 a back
view, and Figure 5 a top view or plan of a stove constructed according
to my Invention.
b
In these views a is the hollow hot-air chamber or receiver; 6 is a bent
passage forming the communication between the chamber a and the part
of the stove above the grate. The smoke from the fire passes down
through 6 into a, and thence through the spaces c (see Figure 4) up the
chimney. In its passage the smoke becomes partially or wholly burned,
and any soot falling from the chimney into a will also be burned.
Any ash or remains may be removed from a by the slide or door d
(Figures 1 and 2).
It will be obvious that my plan may with advantage be used for
kitchen ranges, ovens, the furnaces of steam boilers, and for similar

page_text: purposes, and in Figures 6 and 7 I show it applied to a locomotive.
a being the hot-air chamber or receiver whilst the passage b is formed by
means of the plate or deflector e.
Although I have hitherto mentioned and prefer the use of one hot-air
chamber or receiver it will be obvious that two or more such chambers
may be used, and also two or more passages leading thereunto.
Having now particularly described and ascertained the nature of my
said Invention, and the manner in which the same is to be performed,
I wish it to be distinctly understood that what I claim is, the use of
the improvements in stoves and fire-places consisting of the smoke
conducting and combustion arrangements herein-before described.
In witness whereof I, the said Thomas Nash, have hereunto set
my hand and seal, this Fifteenth day of July, in the year of
our Lord One thousand eight hundred and sixty-eight.