Improvements in Self-fluxing Solder.
Year: 1899

page_text: Date of Application, 5th July, 1899-Accepted, 19th Aug., 1899
COMPLETE SPECIFICATION.
Improvements in Self-fluxing Solder.
We, JESSE F. KESTER, Electrician, and FRANK ABNER HECHT, Manufacturer,
both of 245, South Jefferson Street, Chicago, in the State of Illinois, United States
of America, do hereby declare the nature of this 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 solder or soldering wire which has a suitable flux
incorporated therewith, so that the flux is melted with the solder and auto-
matically supplied to the same. Such self-fluxing solder or wire has heretofore
been constructed in the form of a tube having a continuous cavity from end to
end which cavity was filled with a flux either dry or pulverized or in the
form of a paste. This construction is objectionable because, as the flux fuses at
a lower temperature than the solder, it melts not only at the end of the solder
but some distance from the end of the same, and too much therefore runs out
of the tubular solder at each operation, leaving little or no flux close enough
to the end of the tube to be of any service for the next soldering operation.
The object of this invention is to so construct the solder that when the same
is heated, only the proper quantity of flux will be supplied thereto throughout
the length of the rod or wire, and to that end the invention consists essentially
in providing the solder with a longitudinal series of isolated cells or compart-
ments containing the flux.
In the accompanying drawing which illustrate various ways of carrying out
my invention.
Figure 1 is a longitudinal section of a piece of tubular soldering wire filled
with flux showing its condition before being corrugated to form flux colls.
Figure 2 is a longitudinal section of the finished solder, on an enlarged scale.
Figure 3 is a top plan view thereof. Figures 4 and 5 are cross sections of the
same taken on lines A-A and B-B respectively, of Figure 3. Figure 6 is a
top plan view of a slightly modified construction of the solder. Figure 7 is a
cross section taken on line C-C, Figure 6. Figure 8 is a longitudinal section
showing another modified construction. Figure 9 is a cross section taken on
line DD, Figure 8. Figure 10 is a top plan view showing a modified form and
arrangement of the flux cells.
Like letters of reference refer to like parts in the several figures.
The invention consists in forming the solder or soldering wire with a series
of adjoining isolated cells, cavities or compartments a which contain the flux b,
instead of providing the solder with an unbroken core or filling of flux from end
to end. By thus dividing the flux into separate sections or charges, only one
flux cell is melted off the solder at a time, thereby always supplying the proper
quantity of flux to the solder and preventing the irregular and excessive running
out of the flux incident to the use of a solder having a continuous core of flux.
These separate flux cells may be formed and arranged in the solder in various
Wava

page_text: In the preferred construction shown in Figures 2, 3, 4 and 5, the colls or pockets
are formed by filling a tube or hollow wire of solder with a suitable flux, either
in dry, plastic or liquid form, as shown in Figure 1, and then compressing or
pinching the tubes at intervals, say about three sixteenths of an inch, so as to
close the interior walls of the tube together and form partitions or webs c which
isolate each cell from adjoining cells, as shown in Figures 2, 3 and 5. The solder
may be prepared in this manner by grooving ordinary and well known wire
solder lengthwise between rollers or otherwise, to render it trough shaped in
cross section, then filling the groove with flux, again closing the edges of the
solder together and giving it a rounded or oval cross section and finally corru-
gating it between suitable rollers, or otherwise forming the partitions c. By
this construction the flux is not only prevented from running out of the solder
in irregular and excessive quantities but the solder is easily divided into cells
of uniform size containing a uniform quantity of flux.
When the invention is applied to comparatively wide bars of, solder, such as
are used for instance in soldering the seams of sheet metal roofs, the bar may
be provided with several rows or cells, as shown in Figures 6 and 7 and the cells
may be arranged in straight rows extending from end to end of the bar, as shown
in Figure 6 or in diagonal rows, as shown in Figure 10, in which latter case the
cells may be lozenge-shaped, as shown.
As a further modification of the invention, the self-fluxing solder may be
formed from a solid bar or rod of solder by forming the flux cells or compart-
ments a in the surface of the bar and closing the same by a covering strip d;
after filling them with a flux. This covering strip may be applied to the solder
by pressure or otherwise.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1. A self fluxing solder provided with a longitudinal series of independent
cells or compartments each containing a suitable flux.
2. A self-fluxing solder consisting of a tubular wire or rod of solder having
its walls pressed together at intervals, thereby forming webs or partitions which
divide the cavity of the tubular solder into a longitudinal series of isolated cells
or compartments, said cells being filled with a suitable flux.
....
1
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.