Improvements in Gas Furnaces for Chain Welding and other purposes,
Year: 1899

page_text: Date of Application, 7th Jan., 1898
Complete Specification Left, 3rd Oct., 1899-Accepted, 11th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in Gas Furnaces for Chain Welding and other purposes,
We, GUY HUGGINS GARDNER, Managing, Director of the Automatic Chain
Company Limited, of Skinner Lane, and HowARD LANE, Engineer, of Corpora-
tion Street, both in the City of Birmingham, do hereby declare the nature of
this invention to be as follows:-
This invention consists of improvements in gas furnaces for chain welding
and other purposes, our object being to construct a compact and convenient
furnace in which a high temperature can be readily obtained at a low cost in
fuel.
In constructing a furnace in accordance with our invention to be used in
the production of welded iron chains of the "short link" or other types, we
form the furnace body from fire-brick or other refractory material braced or
secured by angle bars and by rods or stays in any ordinary manner. The com-
bustion chamber or furnace proper is formed beneath a detachable working bed
consisting of a refractory slab suitably perforated for the particular size of
links to be welded. The space immediately above the slab, and between the same
and the upper part of the furnace, is open on one side to the operator, who
suspends the links in the slab perforations by means of hooked handle bars or
rods or in any other convenient mannor. At the back of the combustion
chamber we fix in the furnace bed a tuyere into which the gas is admitted pre-
forably through one common supply pipe fitted with a controlling cock or valve.
Within the tuyere box we a arrange the outlet ends of the air supply pipes, such
ends being caused to project into conical outlet or discharge apertures formed
in the side of the tuyere box adjacent to the combustion chamber. By making
the air outlets of a conical configuration and adjustable upon their respective
air pipes, we are enabled to adjust the size of the annular orifice between each
of the air outlets and the conical discharge apertures of the tuyere box as may be
required. The gas from the tuyere box can obtain access to the combustion
chamber only through the said adjustable annular orifices between the central
air jets and the conical discharge apertures in the tuyere box.
The air is forced into the combustion chamber by a fan or by other means,
but before reaching the hereinbefore described adjustable outlet ends in the
tuyere box, it is caused to travel several times across the upper part of the
furnace through pipes disposed in a zig-zag or other arrangement within the
said part of the furnace. The hot gaseous products of combustion from the
combustion chamber in passing from the slab apertures or perforations herein-
before described to the furnace flue or chimney, are caused fo impinge upon the
exterior of the pipes and thus the air passing through the interior of the same
becomes effectually heated before admission, along with the combustible gas,
to the combustion chamber, as herein before described.
With our improved furnace we are enabled to rapidly heat the links to weld-
ing temperature with a small consumption of gas.
We employ our improved furnace, which we adapt for burning water gas,

page_text: or other gaseous fuel, for use in the manufacture of harness rings, shackles, and
other articles, fitting a slab or slabs to the top of the combustion chambers per-
forated to suit such articles.
Μy Συντ
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, & 25, Cross Street, Manchester,
Agents for the Applicants,
COMPLETE SPECIFICATION.
Improvements in Gas Furnaces for Chain Welding and other purposes.
We, Guy HUGGINS GARDNER Managing Director of the Automatic Chain
Company Limited, of Skinner Lane, and HowARD LANE, Engineer, of Corpora-
tion Street, both in the City of Birmingham, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
This invention consists of improvements in gas furnaces for chain welding
and other purposes, our object being to construct a compact and convenient
furnace in which a high temperature can be readily obtained at a low cost in
fuel.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to
Figure 1 is a sectional side elevation, and Figure 2 a sectional end elevation
on the line a b Figure 1, representing a gas furnace as constructed in accordance
with our invention for use in the production of welded iron chains of the "short
link"
or other types.
The
Figure 3 is a sectional side elevation, and Figure 4 a sectional end elovation,
showing, to a larger scale, the arrangement of the tuyere box and its fittings.
The same reference letters in the different views indicate the same parts.
We form the furnace body from fire brick or other refractory material braced
or secured by angle bars and by rods or stays in any ordinary manner.
combustion chamber or furnace proper is formed beneath a detachable open.
hearth working bed A consisting of a refractory slab suitably perforated for
the particular size of links (such as B) to be welded. The space Û immediately
above the slab, and between the same and the upper part of the furnace, is open
on one side to the operator, who suspends the links in the slab perforations by
means of hooked handle bars or rods such as 1 or in any other convenient
manner. At the back of the combustion chamber we fix in the furnace bed a
tuyere box E into which the gas is admitted at e preferably through one common
supply pipe fitted with a controlling cock or valve. Within the tuyere box we
arrange the outlet ends of the air supply pipes, such ends being caused to pro-
ject into conical outlet or discharge apertures formed in the side of the tuyere
box adjacent to the combustion chamber F. By making the air outlets & of
a conical configuration and adjustable upon their respective air pipes, we are
enable to adjust the size of the annular orifice between each of the air outlets and
the conical discharge apertures as I of the tuyere box as may be required for
regulating the quantity of gas to be mixed with the air. The gas from the
tuyero box can obtain access to the combustion chamber only through the said
adjustable annular orifices between the central air jets or outlets G and the
conical discharge apertures in the tuyere box.
The air is forced into the combustion chamber by a fan or by other means,

page_text: but before reaching the hereinbefore described adjustable outlet ends in the
tuyere box E, it is caused to travel several times across the upper part of the
furnace through pipes disposed in a zig-zag or other circuitous arrangement
within the said part of the furnace. The hot gaseous products of combustion
from the combustion chamber F in passing from the slab apertures or perfora-
tions hereinbefore described to the furnace flue or chimney, are caused to
impinge upon the exterior of the pipes and thus the air passing through the
interior of the same becomes effectually heated before admission, along with the
combustible gas, to the combustion chamber, as hereinbefore described.
The furnace illustrated in the drawings is provided with a tuyere box E fitted
with five adjustable discharge jets or nozzles such as G, and each jet is supplied
with air coming through an independent set of piping arranged in a circuitous
manner. Thus as will be seen at Figure 2, five sets of piping are arranged in
the upper part of the furnace; the whole of the sets are attached to one common
air supply connection as J.
With our improved furnace we are enabled to rapidly heat the links to weld-
ing temperature with a small consumption of gas.
We employ our improved furnace, which we adapt for burning water gas
or other gaseous fuel, for use in the manufacture of harness rings, shackles, and
other articles, fitting a slab or slabs to the top of the combustion chamber per-
forated to suit such articles.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
.
1.-In gas furnaces for chain welding and other purposes, means for heating
the incoming air by the hot gaseous products of combustion comprising the
arrangement of the air supply pipes above the perforated open hearth, substan-
tially as described and as illustrated.
2. In gas furnaces for chain welding and other purposes, means for regulating
the quantity of combustible gas to be mixed with the incoming air, substantially
as described and as illustrated.
3. In gas furnaces for chain welding and other purposes, the arrangement
of the open hearth perforated working bed A with the furnace F beneath the
same, the said furnace being supplied with a mixture of combustible gas and
heated air, substantially as described and as illustrated.
4. In gas furnaces for chain welding and other purposes, the combination with
a tuyero box as E having a gas admission aperture e and conically shaped
outlet H, of air admission nozzles G adjustable in the said outlets H, substan-
tially as described and as illustrated.
5. A gas furnace for chain welding and other purposes constructed sub-
stantially as described and as illustrated.
DOLOR BRI day of October 1000.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, & 26, Cross Street, Manchester,
Agents for the Applicants.