Method of Repairing Aluminum Castings. Page: 2 of 3
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UNITED STATESPATENT OFFICE.
SAMUEL D. IRWIN, OF FLOYDADA, TEXAS.
METHOD OF REPAIRING .ALUMINUM CASTINGS.1,309,033.
Specification of Letters Patent.
Patented July 8, 1919.
Application filed November 26, 1918. Serial No. 264,250.
To all whom it may concern:
Be it known that I, SAMUEL D. IRWIN,
a citizen of the United States, residing at
Floydada, in the county of Floyd and State
5 of Texas, have invented certain new and
useful Improvements in Methods of Repair-
ing Aluminum Castings, of which the fol-
lowing is a specification.
The present invention has for its object
10 the repairing of fractured -aluminum cast-
ings, whereby the same are made equal to
new both as to service and appearance.
In accordance with the present invention
a composite plate is provided and is utilized
15 as means for sustaining the metal when re-
duced to a molten state by the application
of an intense flame, said plate assuring a
smooth surface to the weld upon one side.
The drawing illustrates a preferred em-
20 bodiment of the invention; however, it is to
be understood that in adapting the same to
meet different conditions, various changes
in the form, proportion, and minor details
of construction may be resorted to without
25 departing from the nature of the invention
as claimed hereinafter.'
Referring to the accompanying drawing,
Figure 1 is a perspective view of a weld-
ing plate embodying the invention.
30 Fig. 2 is a sectional view of the plate.
- Fig. 3 is a detail view illustrating the
method.
Corresponding and like parts are re-
'ferred to in the following description and
35 indicated in the several views of the draw-
ing by like reference characters.
In accordance with the invention a com-
posite plate is provided, the same. consist-
ing of a base or foundation 1 and a layer 2
40 of alloying metal to combine with the alu-
minum during the process of. welding. The
base or foundation 1 may consist of a plate
of iron, copper, or other metal having a
relatively high fusing point. The layer 2
45 applied to one side of the base or founda-
tion plate 1 is relatively thick and consists
of tin, zinc, antimony or a combination of
analogous metals fusing at a relatively low
point. The layer 2 constitutes an alloying
50 bed which combines with the aluminum,
thereby facilitating the welding process.
The.base plate 1 acts as a carrier for the
alloying bed 2 and sustains the metal when
fused.In accordance with this invention the 55
method is carried out in the following man-
ner:-Let 3 represent an aluminum casting
having a fracture 4. As a preliminary step
the outer portion of the fracture is enlarged
to facilitate the application of the flame. 60
This step is not essential although desirable.
A piece of the welding plate sufficient to
amply cover the fracture is applied to the in-
ner side of the casting and conformed to the
surface thereof, as indicated at 5. This 65
welding piece 5 is placed with the alloying
bed in contact with the inner surface of the
casting and the plate is conformed to the
inner surface of the casting by pressure or
blows of a hammer delivered thereon or in 70
any way_ found most convenient, it being
essential that the welding plate be made to
fit close against 'the inner surface of the cast-
ing and extend some distance on each side
of the fracture. After the welding plate has 75
been fitted to the casting a backing 6 of
asbestos, or other refractory material is ap-
plied to the plate and casting to hold the
welding plate in position. The backing 6 is
applied preferably in a plastic state and is so
retained in position either by adhesion or
by the application of suitable bracing means.
After the casting has thus been prepared
an intense flame such as an oxyacetylene jet
is directed against the fracture 4, thereby 85
causing the alloying bed 2 to fuse and the
bed thus fusing amalgamates with the alu-
minum and causes it to fuse, whereby the
parts- bordering upon the fracture 4 are
caused to unite in a manner well understood 90
in the process of welding. A feeder stick is
utilized to flush the joint so that the outer
surface may come flush with the outer sur-
face of the casting and also fo provide
sufficient metal at the weld. The process is 95
now completed and after the casting has
cooled sufficiently the backing 6 is removed
and the base or foundation plate 1 peeled
or stripped off thereby leaving the inner
surface of the casting perfectly smooth. 100
Having thus fully described my invention .
what I claim as new and desire to secure
by Letters Patent is:
The herein described method of welding
aluminum castings which consists in apply- 105
ing a welding plate to a side of the article
to be welded, said plate comprising a base
and an alloying bed. the plate being applied
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Irwin, Samuel D. Method of Repairing Aluminum Castings., patent, July 8, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257438/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.