Year: 1892

page_text: Date of Application, 1st Mar., 1892-Accepted, 2nd Apr., 1892
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 consists in an apparatus for forging, working and welding links,
tires, hoops, tubes and continuous forms, hereinafter fully described and claimed.
Figures 1 and 2 are top plan views, differing only in slight change of position in
the clamps.
Figure 3 is an elevation of a square link.
Figure 4 is a diagram showing a split instead of a continuous conductor.
Figure 5 represents an upset link.
Figure 6 is a plan view; and
Figure 7 is a side elevation showing an adjustable internal conductor.
Figure 8 is a plan of a link in the form of a figure 8; and
Figure 9 is a plan of a link to be welded in a scarf joint.
A, represents a table provided with clamps K and K insulated therefrom to hold
the link to be welded, and one of them, as K., is made movable by a screw W, to
press the ends of the link together for welding. In the ordinary method of welding
by passing a heating current through the link, the volume of the current may be
greater than that which the solid part of the link can carry without heating, and
the object of this invention is to avoid the great waste of this process by passing
the current transversely across the ends which are to be welded and the opposite
portion of the link. E represents a conductor movably carried on table A, but
insulated therefrom and connected at E' with one pole of a generator of electricity,
which is here intended to be represented as one terminal of the secondary of a
transformer or converter, though any suitable source of electricity may be used.
The arrangement of conductor E is such that it may be brought into contact with
the link held between the clamps K K', the mechanism shown in the drawing for
that purpose being a screw shaft R'. D represents a conductor inserted in the
opening in the link opposite conductor E, to furnish a short path for the current
instead of having the same travel around the link. C represents a conductor
similar to E and likewise movably mounted on the table A, but insulated there-
from, so that it may be brought into contact with the other side of the link.
opposite conductor E, and this conductor C is connected at C¹ with the other pole
of the generator.
The operation of this invention is as follows:-
The parts being in the position shown in Figures 1 and 2; the current is turned
on, and, in entering conductor E, traverses, the ends of the link in cross section,
leveloping heat at the points of contact, then principally passes through con-
luctor D, through the link at the point opposite the point of welding, and out
through conductor C to the other pole of the generator, thus heating the point to
be welded and a point immediately opposite. When the link is brought to a
velding heat the current may be shut off and a clamp K' is moved by screw W,
hus forcing the open ends of the link together and forming a weld, and at the
[Price 8d.1

page_text: same time upsetting to some extent the heated portion of the link opposite the weld,
the finished link being approximately as represented in Figure 5.
In the arrangement shown in Figure 2, the clamps K K are at one side of the
link instead of on the central line, the effect of this will be that the heated part
of the link opposite the weld will be rather bent than upset. In Figures 1 and 2,
conductor D has been represented as a single block of conductive material placed
in the opening of the link and in contact with cach side of the opening. As,
however, these openings may vary in size, the conductor D may be made jointed,
as shown in Figure 7, and provided with any desired mechanism for opening or
closing it, the mechanisin herein illustrated being the ordinary toggle-joint. In
the arrangement shown in Figure 6, one of the conductors there marked C is made
double so as to abut against the edge of the link or ring H, while one end of the
interior or bridging conductor D, which is here shown as a two part adjustable
conductor, one part sliding upon another, is shown slightly forked at its end. In
Figure 4, the conductor C is also shown double, the conductor E being like
that shown in Figures 1 and 2, that is, non-adjustable, but slightly forked at
the end.
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. In an apparatus for electrically welding, working or forging links or rings,
the combination, with an insulated support to hold the link, of means for com-
pressing the link end wise, an electrical conductor adapted to connect the open ends
of the link with one pole of a generator of electricity, an electrical conductor
adapted to connect that point of the link opposite the ends with the other pole of
said generator, and means for electrically connecting the ends of the link with the
opposite side thereof across the opening of the link, substantially as and for the
purposes set forth.
2. In an apparatus for electrically welding, working or forging links or rings,
the combination of insulated clamps to hold the link, a movable conductor connected
with one pole of a generator of electricity in contact with the ends of the link to
be welded, an interior conductor connecting the ends to be welded with the
opposite part of the link, and a conductor connecting the link opposite the point
of welding with the other pole of the generator, substantially as shown and
described.
3. In an apparatus for electrically working, welding or forging links or rings,
the combination of two clamps for holding the link, means for moving one of the
clamps, electrical conductors connected with the poles of a generator and adapted
to make contact with opposite points on the outside of the link, and an internal
conductor adapted to connect the two sides of the link, substantially as shown and
described.
4. In an apparatus for electrically welding, working or forging links or rings,
the combination of two clamps for holding the link, means for moving one of the
clamps, electrical conductors connected with the poles of a generator and adapted
to make contact with opposite points on the outside of the link, and an internal
adjustable conductor adapted to connect the two sides of the link, substantially as
shown and described.
Dated this 29th dox of Wohm1800