Improvements in and relating to Furnaces and to Domestic.. Fire-places.
Year: 1891

page_text: Date of Application, 30th Nov., 1891
Complete Specification Left, 30th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Furnaces and to Domestic..
Fire-places.
We, HENRY DENT of Byerden Brick Works, Burnley, in the County of
Lancaster, Brick Manufacturer, and JAMES SOUTH of Queen's Gate, Burnley,
Machinist, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved mode of supplying air to burning fuel in
furnaces, fire-places and the like, and consists in forming a number of air vents
at the back or bridge of the furnace or fire-place, such vents being slightly contracted
at the end next the fire, and expand at the opposite end into an air flue or chamber,
extending behind or below the fire, and coinmunicating with the ash-pit.
In boiler furnaces, the bridge at the back end of the ordinary fire bar is
preferably inclined up and back from the bars, and we pierce the said bridge with
air vents or conical holes, which will permit the air from a chamber below, to escape
upwards through the conical holes in the bridge, so as to impinge upon, and
mix with the fame and heated gases of combustion as they pass over the bridge,
and so as to intercept and thoroughly consume the combustible portion of the
passing gases and smoke.
In domestic fire-places, we construct the back of the fire-place preferably of fire-
clay, in one block or brick chambered out to form an air space. The side of this
block in contact with the fire may be of concave form, such concavity being
horizontally disposed, whilst the height of the block is on a level or thereabouts
with the top-bar. In the concave surface of this block, we pierce a series of air
vents direct into. the chambered part of the block, in the bottom of which are
formed similar air vents, so as to admit of a constant circulation of air to pass from
the ash-pit through the block and impinge against the fire to assist combustion, and
prevent to a great degree the formation of smoke or soot.
Dated this 27th day of November 1891.
THOS. RICHMOND,
79, St. James Street, Buruley, Agent.
COMPLETE SPECIFICATION.
Improvements in and relating to Furnaces and to Domestic
Fire-places.
We, HENRY DENT of Byerden Brick Works, Burnley, in the County of
Lancaster, Brick Manufacturer, and JAMES SOUTH of Queensgate, Burnley,
Machinist, 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 an improved mode of supplying air to burning fuel in
furnaces, fireplaces and the like, and consists in forming a number of air-vents at
the back of the bridge of furnace or fireplace, such vents being slightly contracted
at the end next the fire, and expanding at the opposite end into an air flue or
chamber, extending behind or below the fire, and communicating with the ashpit.
In boiler furnaces the bridge at the back end of the ordinary firebars is prefer-
ably inclined, and we pierce the said bridge with air vents or conical holes, which
vill permit the air from a chamber to escape upwards through the conical holes in
he bridge, so as to impinge upon and mix with the flame and heated gases as they
Price Rd 1

page_text: pass over the bridge, and so as to intercept and thoroughly consume the combustible
portion of the passing gases and smoke.
In domestic fire places, we construct the back of the fire place preferably of fire-
clay in one block or brick, chambered out to form an air-space. The side of this
block in contact with the fire may be of a concave shape, such concavity being
horizontally disposed, whilst the height of the block is on a level or thereabouts
with the top-bar of the firegrate. In the concave surface of this block is pierced
a series of air vents direct into the chambered part of the block, in the bottom of
which are formed similar air vents, so as to admit of a constant circulation of air to
pass from the ashpit, through the block, and impinge against the fire, to assist
combustion, and prevent to a great degree the formation of smoke or soot.
In the accompanying drawings,
Fig. 1'is an elevation in section of a domestic fireplace constructed in accordance
with our invention, and
Fig. 2 is a similar elevation of a domestic fireplace, in which the invention is
slightly modified as hereinafter described.
In Fig. 1, A represents the fire space of a domestic fireplace, to the rear of which
is fireback B, have a concave surface C. This fireback is preferably formed with
an air space or chamber D, and vent holes or air passages E and F, the former
opening out into the firespace A, and the latter into the ashpit G.
The heated gases or products of combustion emanating in the firespace A, in
passing to the chimney H impinge against the curvature of the concave surface C,
where they are met and comingle with the incoming air issuing from the vent
holes E. This impingement of the heated gases against the fireback, and their
admixture with the incoming air prevent to a considerable extent the formation of
smoke and sooty matter, and will greatly assist combustion. The course taken by
the air from the ashpit through the vent holes E and F and chamber D is indicated
by arrows. These vent holes are preferably conical to ensure a freer passage for
the incoming air, the back draft being necessarily dispensed with, otherwise it
would be impossible to obtain a circulation or passage of air through the vent
holes E and F.
The surface of the fire back in contact with the fire may if desired be of the
shape seen in Fig. 2, instead of the concave surface seen in Fig. 1; whilst the air
vents may be straight and parallel, instead of conical as described in the foregoing
arrangement.
In applying our invention to boiler or other similar furnaces, we construct the
bridge of such furnaces of fireclay, in which are formed a chamber and air vents
similar to those shewn in the fire back of domestic fireplaces represented in Figs. 1
and 2.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. Forming air passages or vents in the fire back of domestic fire-places,
aud closing or dispensing with the back draft, substantially as described for the
purpose set forth.
2. Forming air passages or vents E and F and chamber D in the fire-back of
domestic fireplaces, substantially as described and illustrated.
3. Forming in the bridge of boiler and other furnaces air passages and chamber,
substantially as described for the purpose set forth.
Dated this 29th day of August 1892.
THOS. RICHMOND,
Agent.