Improvements in or relating to Welding or Working Metals Electrically.
Year: 1891

page_text: Date of Application, 17th Nov., 1891-Accepted, 19th Dec., 1891
COMPLETE SPECIFICATION.
Improvements in or relating to Welding or Working Metals
Electrically.
A communication by CHARLES L. Coffin, of Detroit, in the County of Wayne
and State of Michigan, United States of America, Chemist.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.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 inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:--
This invention has for its object improvements in welding or working metals
electrically, hereinafter fully described and claimed.
It consists in the process of welding metals electrically, by first separately
subjecting the articles to be welded to the action of a heating current and the
voltaic arc and then pressing the heated articles together to form the weld.
In the drawing, the figure is a diagram illustrating one means of carrying
the invention into effect.
In order to enable those skilled in the art to make and practise the invention,
the same will be described in detail, referring to the said drawing, where the
letters A A¹ indicate two metal rods, the ends of which are to be heated for
welding or other purposes, and C indicates the lower carbon supported by a block B
but insulated therefrom by insulating material I. The ends of the rods or
articles A A rest in contact with the block B, which matter is a conducting
material.
A conductor E is adapted to connect the rod A' with one pole of a generator
and a conductor H is adapted to connect the lower carbon C with the other pole
of the generator, while a conductor G connects the upper carbon C¹ with the
rod A. In this arrangement, the current is through the conductor E, rod or
article A', block B, rod or article A, conductor G, carbons C¹ C, and conductor H,
back to the generator, as indicated by the arrows.
On passing an electric current through the circuit, the ends of the articles A. A¹
are separately and simultaneously subjected to the heating effect of the current
and also to the heat of a voltaic arc. When, by these means, they have been
sufficiently heated, they are pressed together to form a weld, or worked in any
desired manner.
Having now particularly described and ascertained the nature of the said inven-
tion 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 hereindescribed process of welding or working metals electrically, which
consist in first separately subjecting the articles to be welded to the action of a
heating current and the voltaic arc, and then pressing the heated articles together
to form the weld, or working them in any desired manner, substantially as set
forth.
2. The general combined arrangement of parts substantially as described and
shown.
Dated this 16th day of November 1891.
WM. P. THOMPSON & Co.,
Agents for the Applicant.