Improvements relating to Electric Welding.
Year: 1892

page_text: Date of Application, 12th Jan., 1892-Accepted, 13th Feb., 1892
COMPLETE SPECIFICATION.
Improvements relating to Electric Welding.
1, PETER GENDRON, of 1413 Walnut Street, in the City of Toledo, County of
Lucas and State of Ohio, United States of America, Manufacturer, do hereby
declare the nature of my 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 new and useful improvements in method of electric
welding, and the invention consists in the improved method of forming the
weld between two pieces, and in restoring the upset or enlarged portion to
the size and shape of the pieces which are welded, all as more fully hereinafter
described.
In the present state of the art in electric welding the bent ends of the material
are brought together by means of clamps, adjustable to and from each other,
a current of electricity is passed through, the clamps are made to again
approach and the weld is formed, forming at the point of juncture a burr or
enlargement.
In this process of welding, where material like channel iron, angle iron etc.,
is to be welded, or in any iron having different parts of varying mass or thickness,
if the two ends are cut off square and brought together, the thicker portions will
begin to melt before the thinner portions are properly welded, and the welding of
the thinner portions will be imperfect on account of the burning of the metal, while
the welding of the thicker portions will be imperfect on account of not being suffi-
ciently heated.
The object of my invention is to reduce the burr formed by the end pressure of
the metal and to so proportion the contacting parts as to make a perfect weld under
all circumstances.
In the drawings,
Fig. 1 is a plan view of a part of an apparatus which may be employed in electric
welding.
Fig. 2 is an elevation of a pair of dies employed in reducing the burr on the
metal.
Figs. 3 and 4 are sections through dies for the same purpose employed in
operating on metal of different cross-sections.
Figs. 5 and 6 are detached perspective views of the abutting ends of channel and
half round iron.
A A' are clamps between which the metal can be welded, and B is a lever for
moving the clamps to and fro. Any other suitable construction may be employed
for this purpose.
When the weld has been accomplished in the manner before described, a
burr, shown at C in Fig. 2, is formed around the point at which the weld is made,
and to reduce this to its normal size, I place it while hot between the dies D and E,
these dies being of such shape and size as to reduce the burr to the same cross-
section at the point where the weld is made as at the other points in the length of
the bars to be welded.
In Fig. 3 I have shown dies of the shape used in channel iron, and in Fig. 4, 1
have shown the dies to be used in half round iron.
Before bringing the abutting ends of the metal together I cut out the ends,
as shown in Figs. 5 and 6, bringing together the thinnest points and separating the
thicker parts in proportion to their mass.
In the channel iron shown in Fig. 5, the flanges F are thinner than the
body portion G and therefore I cut out the body portion, as shown at H, cutting it
in the arc of a circle as it increases in thickness towards the middle.

page_text: In bringing the parts together the thinnest parts will first be welded and as
the lever B is moved the thicker parts will be made to gradually approach
and come in contact in proportion to their mass, and I thus obtain a perfect
weld across the entire face of the abutting ends without danger of burning at
any point.
It will be seen that the shoulder I in Fig. 4'is rounded off. This allows the tire
to be forced into the die without cutting off any of the metal at the edges. Thus 1
am assured of the same size for each weld, and can accurately figure on the
expansion of the material in the die.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :
1. The herein described improvement in method of electric welding, consisting in
shaping the abutting ends of the material to have contact at points in proportion to
the mass, heating them by a current of electricity and subjecting them to end
pressure, substantially as described.
2. The herein described improvement in method of electric welding consisting in
shaping the ends of the material to be welded to have contacts at the smallest points
with a gradually increasing separation towards the points of greatest mass, heating
them by a current of electricity and subjecting them to end pressure, substantially
as described.
3. The herein described method of electric welding consisting in shaping
the abutting ends of the material to have contact at points in proportion to the
mass, heating them by a current of electricity, subjecting them to end pressure and
finally subjecting the burr to pressure of suitable dies, substantially as described.
4. The method of welding metal consisting of abutting the ends of the material
and proportionately heating the same by a uniform current of electricity, sub-
stantially as described.
Dated this 13th day of Novembar 1001
PETER GENDRON.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.