Improvements in Electric Welding and Apparatus therefor.
Year: 1899

page_text: Date of Application, 27th Feb., 1899
Complete Specification Left, 22nd Dec., 1899-Accepted, 27th Jan., 1900
PROVISIONAL SPECIFICATION.
Improvements in Electric Welding and Apparatus therefor.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings,
in the County of London, Chartered Patent Agent, do hereby declare the nature
of this invention (as communicated to me from abroad by Geo. L. Thompson
Manufacturing Co., of Chicago, Cook County, Illinois, United States of America),
to be as follows:-
This invention relates to welding seams of tubes, sockets, fittings for cycles,
and other articles of moderate size, by heating the edges to be united by radia-
tion from electric arcs, pressing the heated edges together and finally hammering
or pressing down the rib formed along the seam.
For this purpose, the electrodes which are preferably carbon pencils, pass
through the walls of a refractory furnace chamber with means of adjusting
them nearer to or farther from each other so as to produce arcs between them.
There may be one pair or several pairs of electrodes side by side, these being
preferably connected in series all those on the one side positive and those on the
other negative. The furnace chamber has a slit along one side preferably its
underside for passage of the radiant heat on to the article which is held below
in a clamp so arranged that the edges to be welded can be pressed together as
far as is permitted by a suitable stop.
The operator, looking through darkened glass, when he finds the weld effected,
withdraws the article, and while it is still hot subjects it to a hammer which
may be worked by the foot or may be a pneumatic or other hammer or a press
until the slight rib formed along the welded seam is flattened down. Instead of
withdrawing the work from the furnace chamber, the furnace chamber may be
itself withdrawn from the work. The apparatus is preferably made of duplex
kind for two operators with a single furnace chamber that can be moved to the
one side or the other. While one operator is watching the heating and working
the clamp, the other is hammering on the seam, discharging the welded article
and placing a fresh one in position to be operated on. The furnace chamber
is then moved from the one operator to the other and the process is repeated.
The apparatus is provided with means of measuring and regulating the current
which is led to and from the electrodes by flexible conductors to allow of the
movement of the furnace chamber.
Dated this 27th day of February 1899.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Electric Welding and Apparatus therefor.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings,
in the County of London, Chartered Patent Agent, do hereby declare the nature
of this invention (as communicated to me from abroad by Geo. L. Thompson
Manufacturing Co., of Chicago, Cook County, Illinois, United States of America),
[Price 8d.]

page_text: 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 welding seams of tubes, sockets, fittings for cycles,
and other articles of moderate size, by heating the edges to be united by radia-
tion from electric ares, pressing the heated edges together and finally hammering
or pressing down the rib formed along the seam.
For this purpose apparatus is arranged as shewn in the accompanying draw-
ings, Fig. 1 being a front view and Fig. 2 an end view. Figs. 3, 4 and 5 shew
parts of the apparatus to an enlarged scale, Fig. 3 is a part side view shewing
the work carriage and hammer, part of the spring casing being broken away.
Fig. 4 is a partly sectional front view shewing the work carriage under the
mandrel with the clamps open, the dotted lines shewing them closed as more
clearly seen in the transverse section Fig. 5. The electrodes a which are pre-
ferably carbon pencils, pass through the walls of a refractory furnace chamber b;
with means of adjusting them nearer to or farther from each other so as to
produce arcs between them.
There may be one pair or several pairs of electrodes side by side, two being
shewn at a these being preferably connected in series, all those on the one side
of the furnace chamber positive, and those on the other negative. The furnace
chamber has a slit along one side preferably its under side for passage of the
radiant heat on to the article which is held below in a clamp d so arranged that
the edges to be welded can be pressed together. The operator looking through
darkened glass e fixed in the clamp frame when he finds the weld effected, with-
draws the article sideways by a lever and while it is still hot subjects it on
an anvilf to a spring hammer which is raised by a cam y acting through rod
and lever except when the treadle i is depressed lowering a roller on the rod j
out of reach of the cams q it keeps in action the hammer which might be a pneu-
matic or other hammer, or a press, until the slight rib formed along the welded
seam is flattened down. The furnace chamber instead of being stationary,
may be suspended as shewn from a carriage k and may be moved to and from
the work.
The apparatus is preferably made of duplex kind as shewn for two operators
with a single furnace chamber that can be moved to the one side or the other.
While one operator is watching the heating and working the clamp by hand
wheel the other is hammering on the scam, discharging the welded article and
placing a fresh one in position to be operated on. The furnace chamber is then
moved from the one operator to the other and the process is repeated. The
apparatus is provided with means such as a meter m of measuring and regulat-
ing the current which is led to and from the electrodes by flexible conductors
to allow of the movement of the furnace chamber.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. The herein described method of welding tube seams and the like, by hold-
ing the edges to be welded while they are pressed together in face of a slit or
opening in the side of a furnace chamber heated by one or more electric arcs,
and then hammering down the rib formed along the weld while it is still hot.
2. Apparatus for electric welding constructed and operating, substantially as
described with reference to the accompanying drawings.
Dated this 22nd day of December 1899.
ABEL & IMRAY,
Agents for the Applicant.