Electric Brazing and Soldering Devices.DERING DE
Year: 1892

page_text: Date of Application, 5th July, 1892-Accepted, 8th Aug., 1892
COMPLETE SPECIFICATION.
Electric Brazing and Soldering Devices.
I, WILLIS MITCHELL, Electrician of Malden, in the County of Middlesex, and
State of Massachusetts, United States of America, do hereby declare the nature
of my invention for ELECTRIC BRAZING AND SOLDERING DEVICES 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 electrical devices for brazing or hard soldering; and it
consists chiefly in the combination of a holder for the article or articles to be
brazed or soldered, forming one terminal or electrode of an electric circuit, with a
point or pencil forming the other terminal or electrode thereof, the said point or
pencil being adapted to be directed to various parts of the holder at will so that
the heating action may take place at the point where soldering is needed. The
said invention also consists in the especial construction and combination of parts
constituting the said holder and point and their supporting and connecting devices,
all substantially as hereinafter more particularly set forth and claimed.
In the accompanying drawings,-
Figure 1 represents in perspective the brazing or hard soldering devices
embodying my invention, as applied to a ring, the operator being also shown in the
act of applying them;
Figure 2 represents a detail perspective view of the ring-holder with hand
support, the ring-holding cup being partly detached and the recesses indicated by
dotted lines;
Figure 3 represents a similar view of the point or pencil and its hand-holder and
connections;
Figure 4 illustrates in perspective the application of such a point or pencil to a
Hat holder adapted to receive and hold chains and other articles;
Figure 5 represents a detail view of such a holder;
- Figure 6 represents a perspective view of devices similar to those shown in
Figure 1, but having an independent support for the ring-holder instead of its
hand-hold;
Figure 7 represents a detail perspective view of a holder similar to that shown
i. Figure 5, but slightly modified to adapt it to be used in making or inending a
watch-case, the point or pencil being shown in position for acting on the edge or
periphery of the latter.
A designates a ring-holding cup or hollow cylinder which is normally held in
horizontal or inclined position, the ring being held on the outside thereof and the
internal recess of said cup or cylinder being open at its outer end only, to admit
the pointer or pencil hereinafter described. This cap has a rearwardly extending
stem a which fits into a recess of a socket B which is cylindrical in its general
form; both socket and cup being of electrically conducting material. As shown
in Figures 1 and 2, the said socket is attached to a handle or hand-hold C, which
is bent down like the stock of a pistol for convenience in grasping. The fastening
together of the said parts is preferably effected as shown in Figure 2 by pins
which extend from the said socket into the said handle and by a screw c which
extends from the base of recess b.through an opening in the rear end of the said
socket into the said handle. A clamp-screw d, turning into the said socket, makes
connection between it and a circuit wire D.
designates a rod pointer or pencil of electrically conducting material which
extends from end to end through the upper part of a socket F having the general
shape of the letter T with a short stem. and a broad upper part. A clamp
screw g, extending down through the material of the upper part of the socket at
* Prime Ri

page_text: .
the middle thereof, binds against this rod pointer or pencil, holding it in place
and also making electrical connection between it and the circuit wire G. The
stem enters a handle H.
When a broken ring is to be soldered, it is slipped on the cup A, as indicated
at I, Figure 1, and the solder 1' is placed on it. The pencil E is then introduced
into the cup A and the point presented against the interior, completing the circuit
opposite the fracture in the ring. The said point is then slightly withdrawn,
producing an arc which heats that part of the said cup against which the point of
the said pencil is directed sufficiently to melt the solder which runs into and solders
together the broken part of the ring. The operator's sight is not dazzled or
confused by any flame, and the operation is very speedy. Both the cup and the
pencil are preferably of carbon, this material being found to be the best for such
purposes. When the devices are constructed as in Figures 1, 2 and 3, the said
cup and pencil, being held quite freely in the operator's hands and moved about at
will, may easily be arranged at any convenient angle with regard to each other
and manipulated so as to secure the best result.
As shown in Figures 4 and 5, a flat form of holder may be substituted for the
cup hereinbefore described, the latter being available only for annular articles.
A flat sheet J of carbon with edges j raised on three sides to form flanges and an
outwardly extending stem J, Figure 5, constitutes, this substituted device. The
recess of the socket B receives this stem and the operation is as before described,
the pencil being applied to the bottom of the holder at a point under the part of.
the article which needs soldering. Several articles may be held in this dust-pan-
like holder at once; or it may hold a chain broken in several places, the pencil
being shifted from point to point until all are mended.
In mending a watch-case or similar article, it is often necessary to solder some
part of the peripheral face which could not be reached in this manner from below.
Therefore, as shown in Figure 7, I employ a holder of carbon not unlike that
shown in Figure 5, but having a larger flange raised at one edge of it. The
watch, watch-case or similar article is arranged on this holder with the part of its
periphery which is in need of soldering against this flange. The pencil constituting
the other terminal or electrode is applied to the exterior face of this flange.
opposite the part to be soldered, with results as before.
Instead of mounting both of the electrodes on movable sockets with. handles,
the ring-holder or holder for other articles may be mounted on
a fixed
standard K, as shown in Figure 6. In this case it is often found desirable to use
an additional carbon L, a pencil of small diameter, which protrudes into the
recess 6 of the cup B and practically forms a part of the latter. Being the point
of this electrode which is directly opposite the point of the other electrode or
pencil E when the latter is centrally presented to the said cup an arc will be
formed passing from one point to the other of the said electrodes and this arc will
heat the contiguous part of the cup as desired.
1:.
Many other forms of holder may of course be substituted and the construction
of the pencil E and auxiliary devices may be modified considerably without
departing from the spirit of my invention. The holder must be thin enough to
allow an arc to heat through it from the point of the pencil to the article to be
soldered.
Having thus described my invention, what I claim as new and desire to secure
by Letters Patent is :
1st. In devices for brazing and soldering, the combination of a holder for the
article or articles to be soldered with a movable pencil or pointer which is adapted
to be presented to different points of the said holder, opposite the parts in need of
soldering, the said holder being of carbon or equivalent material and thin enough
to allow an are to heat through it from the pencil to the article or articles, the
said holder and pencil constituting the electrodes of an electric circuit substan-
tially as set forth:
"
:

page_text: 2nd. In combination with a carbon cup, forming one electrode of an electric
circuit and adapted to receive and support a ring or rings upon it, a movable
carbon pencil forming the other electrode of the said circuit and adapted to be
introduced into the cavity of the said cup, substantially as and for the purpose
set forth.
3rd. In combination with a holder for articles to be brazed or soldered, a socket
into which the said holder is fitted, an electric conductor attached to the said
socket making the said holder one of the electrodes of an electric circuit, and a
handle attached to the said socket for moving the latter about at will, substantially
as set forth.
4th. In combination with a holder of infusible electrically conducting material
for supporting articles to be brazed or soldered and connections making it one
of the electrodes of an electric circuit, a pencil constituting the other electrode
thereof, electrical connections with said pencil completing the circuit, and a socket
and handle for the said pencil whereby it may be presented to any point of the
said holder as desired, substantially as set forth.
Dated this Second day of June 1892.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.