Improvements in Furnaces for Heating Metal Sheets.
Year: 1895

page_text: Date of Application, 25th Feb., 1895
Complete Specification Left, 24th Dec., 1895-Accepted, 25th Jan., 1896
PROVISIONAL SPECIFICATION.
Improvements in Furnaces for Heating Metal Sheets.
We, THOMAS RICHARD LUDFORD, of Cowell Street, Llanelly in the County
of Carmarthen, Solicitor, SAMUEL REES DAVIES, of 17 Mansel Street, Llanelly
aforesaid, Tinplate Worker, and REES DAVIES, of 31 Hicks Street, Llanelly
aforesaid, Grocer, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to improvements in furnaces for heating metal sheets and
furnaces constructed according to it are especially adapted for use in tin plate
works inasmuch as they are capable of heating the plates out of contact with coal
or any other substance likely to cause dirty and waste plates.
In carrying our invention into effect, we provide for the flames and hot gases
from the furnace being led lengthwise, of the stove and nuder the floor of it, from
back to front, and delivered into the stove at the front end thereof, escaping into
the air from the opposite or back end. This provision produces an equable
temperature throughout the stove. Further, in place of the usual layer of coal, or
the like upon the floor of the stove, we use a series of metal bars.
The furnace or fire place is at the back of the installation and is of the same
construction or nearly so as heretofore. There is an opening from this furnace
into a flue which extends for the full area of the floor of the store and immediately
under it. At the front end of this flue, there are three (more or less) vertical
flues leading upwards from it and delivering into the stove. These vertical flues
are, preferably, within the stove walls and are, in any case, provided with
independent dampers. The delivery mouths of these flues are set at different
heights so as to secure an equable distribution of heat into the stove. For instance,
with three flues, the delivery mouth of the middle one may be in the plane of the
floor of the stove, while those of the outer flues are in a plane parallel with the end
of the stove and at about half the height thereof. The exit opening from the
stove is in the back wall on to the downwardly sloping roof of the furnace.
A series of suitable flue doors is provided for the purpose of giving access to the
Hue under the stove.
The floor of the stove is prepared to receive the plates by bearers laid
transversely of it at suitable distances from each other. These bearers are,
preferably, rebated along their top edges. Short bars are laid from one bearer to
the other.
We retain the usual valve or damper-controlled opening in the front end of the
stove.
Dated this 25th day of February 1895.
PHILLIPS & LEIGH,
Agents for the Applicants.

page_text: Improvements in Furnaces for Heating Metal Sheets.
We, THOMAS RICHARD LUDFORD, of Cowel Street, Llanelly in the County
of Carmarthen, Solicitor, SAMUEL REES D'AVIES, of 17 Mansel Street, Llanelly
aforesaid, Tinplate Worker, and REES DAVIES, of 31 Hicks Street, Llanelly
aforesaid, Grocer, 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 :-
Our invention relates to improvements in furnaces for heating metal sheets, and
furnaces constructed according to it are especially adapted for use in tin-plate and
copper works, inasmuch as they are capable of heating the plates out of contact
with coal or any other substance likely to cause dirty or waste plates.
We provide for the flames and hot gases from the furnace or fire-place, being
conducted lengthwise of the stove and under the floor of the same from back to
front, and delivered into the stove at the front end thereof, and escaping into the
chimney from the opposite or back end. This provision produces an equable
temperature throughout the store. Further, we use a series of grate bars in place
of the usual layer of coal or the like upon the floor of the stove.
Referring to the accompanying drawings, wherein we have shown a preferred
mode of carrying our said invention into effect.
Figure 1 represents a sectional side elevation of our improved furnace.
Figure 2 is a sectional plan taken on the line 2-2 of Figure 1:
Figure 3 is a sectional front elevation taken on the line 3-3 of Figure 1:
Figure 4 is.a rear elevation of our improved furnace:
Figure 5 is a sectional plan taken on the line 5-5 of Figure 1:
In these several figures a designates the furnace; b, the flue; c, the stove; and
d, the chimney. According to the mode shown in the accompanying drawings, the
fire place a is arranged at the back of the installation and is of the same construc-
tion, or nearly so, as heretofore. This fire-place opens into the flue which
extends for the full area of the floor e of the stove e and immediately under it.
At the front end of the said Hue b, there are three (more or less) vertical flues f, g, h,
leading upwards from it and opening into the stove c. These vertical flues are,
preferably, within the stove walls and are in any case provided with independent
dampers, g, h,—see Figures 1, 4, 5. The delivery mouths of these flues are set
at different heights, so as to secure a uniform distribution of heat into the stove c.
For instance, with three flues, the delivery mouth of the middle flue may be in
the plane of the floor e of the stove, while those of the outer flues g, h, are in a
plane parallel with the end of the stove and at about half the height thereof. The
shaft stands at the junction of the sloping roof of the furnace with the arc
shaped back of the stove c. This back serves also as the arched roof of the
fire place a.
A series of suitable flue doors, k, l, m, is provided for the purpose of giving
access to the flue under the stove c.
On the floor e of the stove c, there are arranged, at suitable distances from each
⚫ other, a number of transverse bearers n adapted to support short bars o so as to
constitute a kind of grate on which are laid the metal plates to be heated.
For starting the furnace and also for enabling the products of combustion to
pass into the chimney d without heating the stove c, we establish a direct com-
munication between the said fire place and chimney by forming an aperture in
the downwardly sloping roof, j' of the furnace this aperture being controlled by a
damper pl.
We retain the usual valve or damper-controlled opening 9 in the front end of the
stove.

page_text: The type of fire place a may be modified as may be required, according to the
fuel, coal or coke, oil or gas, which it is desired to use. The shaft d may stand at
the front end of the furnace, the exit i being connected with it by a horizontal flue
in the roof j. The position of the fire place, too, may be modified to the extent of
placing it nearer to the front of the installation, so as to be partly or altogether
under the floor e.
Having now particularly described and ascertained the nature of our said iuven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. A furnace for heating metal plates, in which the fire place a is arranged
independently of the stove c at the rear end, and communicates with the front end
of this stove through a flue 6 immediately below its floor e, damper-controlled
flues f, g, h; substantially as and for the purposes set forth.
2. A furnace for heating metal plates, in which the stove c, having its floor
provided with bearers n and bars o, communicates with the flue 6 below the same,
through vertical flues f, g, h. whose delivery mouths are at different heights and
controlled by independent dampers; substantially as and for the purpose set
forth.
3. A furnace for heating metal plates, substantially as hereinbefore set forth.
Dated this 24th day of December 1895.
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.