Improvements in Electric Welding.
Year: 1890

page_text: עענגע
Improvements in Electric Welding.
A communication from abroad by CHARLES LEWIS COFFIN, of Detroit, in the County
of Wayno, and State of Michigan, United States of America, Chemist.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., M.1.M.E. of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, and 323, High Holborn, in the County of Middlesex,
Civil Engineer, 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 improvements in electric welding, and has partly for
its object the welding of metals by subjecting the same to the action of a voltaic arc.
By the invention, the joint is re-enforced by making one of the conductors between
which the arc is sprung which traverses the joint, of metal, so that, when fused by
the arc, the molten metal will fall on and re-enforce the joint.
Figure 1 of the drawings, which are really illustrating diagrams, represents the
method applied to that system of welding in which the arc is sprung between two
independent conductors.
Figure 2 represents the invention as applied to that system of electric welding in
which the arc is sprung between a conductor and the material to be welded.
In Figure 1, A A represent the articles to be welder; CC, the conductors
between which the arc is sprung, connected with the poles of an electric generator,
as by the wires W; and B represents the carbon holder.
In Figure 2, A A' represent the articles to be welded, connected with one pole of
a generator of electricity, as by the wires W. C represents a conductor between
which and the articles A A¹ the arc is sprung, connected with the other pole of the
generator, as by the wire W; and B represents a holder.
Either one of the conductors in Figure 1 in the drawings, C, and the conductor C
in Figure 2 are made wholly or partly of metal suitable to re-enforce the welded
joint, varying of course, with the material to be welded.
In Figure 1 the conductor C is shown as made entirely of metal, and in Figure 2
the lower and of conductor (; is shown as made of metal.
It is evident that as the conductor is drawn along the joints to be welded, the are
will fuse not only the articles to be welded, but will also fuse the metallic conductor,
and that the molten metal will fall upon the joint and become incorporated with and
re-enforce the same.
In Figure 3, A A' represent the articles to be welded, and CC represent carbons
or condutors, which are intended to be carried in a suitable holder, and which are
respectively connected with the poles of an electric generator, as by the wires W,
whereby a voltaic arc is sprung between and downward from said carbons to fuse and
weld together the meeting parts of the articles A and A. In addition to this, the
article A and the article A are connected with the poles of the generator with which
the carbons are connected, or with the poles of an independent generator, in such
manner that the polarity of each article and of the carbon above said article will be
opposite, the article A being negative and the carbon ( being positive, and the
article A' being positive and the carbon C being negative, whereby, in addition to the
arc between the carbons, a voltaic arc is also formed between the carbon C¹ and
article A, and another voltaic arc is formed between the carbon and the article A¹,
thus largely increasing the surface of operation and efficiency of the voltaic arc to
which the parts to be welded are subjected.
In the method illustrated in diagram Figure 4, both articles A and A' are connected,
as by wire W¹, with one pole (in the diagram with the negative pole) of a generator

page_text: of electricity, and the are is sprung between said articles and the carbon B, connected
with the other or positive polo of said generator. In this instance, two carbons D
and B are added, connected with opposite poles of the same generator of electricity
with which A and B are connected, or with an independent generator, the carbon D
being of opposite polarity to carbon B, and carbon E being of like polarity with
carbon B, whereby, in addition to the are between A and B, there are also formed
voltaic ares between B and D, D and E, E and A', whereby the extent of the are
obtained from a given generator is very largely increased and the operation of welding
heavy material very materially facilitated.
Figures 5, 6, 7 and 8 illustrate the improvements as applied to the process of
De Benardos and Olszewski.
In these Figures, the letter G indicates the articles to be welded, and the
letters BB indicate carbons. The letter indicates the carbon-holder, and the
letter indicates the handle of the carbon-holder.
In Figure 5, the carbon B has a central hore, and carries on its upper end a
hopper A, containing fine flings or turnings E, or metal, preferably of the metal
to be welded, which pass down through the carbon and fall through the are upon the
joint, becoming fused and re-enforcing the joint.
In Figure 6, the carbon B is also hollow, and instead of the hopper A and the
filings E, a wire or rod F of the proper metal passes down through the hollow
carbon.
In Figure 7, the carbon is solid, and a funnel J, carried on the carbon-holder C,
delivers filings or turnings in the are between the carbon and the article to be
welded.
In Figures 7 and 7%, two carbons are used, set at an angle to spring the are out-
ward, and the funnel Joxtends down between the carbons.
In Figures 8 and 9, a spool L, carried on an arın K, attached to the carbon-holder C,
carries a wire or ribbon of the re-enforcing material, which is fed, as the holder is
moved, between the end of the carbon or carbons and the joint to he welded.
In all the devices illustrato in these Figures 5 to 9, the object is to simply supply
molten metal to the joint, in addition to that supplied by the articles under treatment,
for the purpose of renforcing the joint.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:-
1. The method herein described of welding two articles together, which consists in
subjecting the articles to the action of a voltaic are of which one pole is metal con-
ductor, fusing said conductor, depositing the molten metal on the joint of the two
articles, and re-enforcing said joint by such molten metal, substantially as sot
forth.
2. The heroin described method of electric welding, consisting in submitting the
joint to be welded simultaneously to the action of manifold arcs instead of a single
are, substantially as and for the purposes set forth.
3. The herein described method of electric welding, consisting in feeding metal to
the joint through the welding-are from a supply carried on the welding-tool.
1004
WM. P. THOMPSON & Co.,
Agents for the Applicant.
WM. P. THOMPSON & Co.,
Agents for the Applicant.
nor enfin 10 Con unez SUDANCE