Manufacture of Composite Plates, Bars, Slabs, Sheets, and the like, of Metals Welded Together.
Year: 1894

page_text: Date of Application, 24th Jan., 1894
Complete Specification Left, 19th Sept., 1894-Accepted, 3rd Nov., 1894
PROVISIONAL SPECIFICATION.
Manufacture of Composite Plates, Bars, Slabs, Sheets, and the like,
of Metals Welded Together.
I, ADOLF RODIG, of Laband, in the Kingdom of Prussia, and Empire of
Germany do hereby declare the nature of this invention to be as follows :-
In the manufacture of plates, bars, slabs, sheets, and the like, of metals welded
together, a plate or ingot &c. of the one metal has heretofore always been placed
in a mould and the other metal or metals have been cast upon its surface or
surfaces, after which the composite plate &c. has been subjected to rolling
processes. In this process of manufacture the adhesion of the metal covering
plate to the flat surfaces of the ingot has alone been relied upon to keep the parts
together during the rolling process.
In some cases it is found that the metals do not sufficiently adhere together by
the simple process of casting, while on the other hand it is sometimes found
desirable that they should not so adhere, in order that by a subsequent rolling
process the covering metal may be enabled to stretch freely over the core metal
so as to cover it more completely before the said metals are welded together.
According to my present invention I insure the connection of the surface metal
or metals to the core metal independently of any adhesion by a casting operation,
by forming upon the surfaces of the core metal grooves, recesses, ribs or
projections into or onto which the surface metal fits either with simple dove tail
edges, or with corresponding ribs, projection grooves or recesses, these being so
formed with dovetailed, undercut, or wedging surfaces, as to hold the parts securely
together while they are undergoing the rolling or welding process.
My said invention can be carried out in two different ways; according to the
one method I place the core or ingot having the said grooves or ribs &c. formed
upon it, into a mould, and I cast the covering metal or metals upon it, as hereto-
fore, the spaces in the mould for such covering metal being so formed that this
will effectually fit into or embrace the said grooves or ribs &c., so as to be securely
held in position. According to the second method, instead of casting the
overing metal on to the core metal, 1 manufacture the same separately as plates
or sheets having the necessary configuration for fitting into or onto the grooves,
recesses, ribs, or projections of the core metal.
For carrying out the first described method of operating, the ingot is
provided with suitable furrows, grooves or recesses such as those shewn in section
by Figs. 1 to 5 inclusive of the accompanying drawings. These need not extend
the whole length of the ingot, as it may sometimes be sufficient to arrange the
recesses or their equivalents only at some places, as shewn in side view in Fig. 6
and in section in Fig. 7.
Nor is it necessary to cast the surface metal the whole length of the ingot, it is
sufficient in certain cases, especially when the surface metal is soft, to cast it only
on the middle part of the core.
In order, when rolling, to prevent displacement of the metal cast on, when the
furrows or grooves extend the whole length of the core there should be provided
in the longitudinal furrows or grooves or elsewhere some transverse grooves by
which the casing metal would be held in position.
This however is not necessary when the recesses are partial as in Figs. 6 and 7.
For carrying out the second method of operating, the core metal or ingot may
be formed with a recessed surface with undercut or dovetail sides, while the
covering plates or sheets are either formed simply with bevilled or dovetail sides,

page_text: as at Fig. 8, or with a dovetail projection on the underside, as at Fig. 1, and they
are then slid longitudinally into the recesses of the ingot. When required, they
may be secured against shifting in the rolling process either by forming the recess
of the ingot with projections at one end as shewn in plan at Fig. 9, these being
tightened on to the covering plate before rolling by blows with a hammer, or the
recess of the ingot and the covering plate may be made slightly taper, as shewn
at Fig. 10 so that when the plate is driven into the recess it will be wedged tight
therein. Or again, the recess of the ingot may be made with slight transverse
notches, recesses or grooves, into which the metal of the covering plate, when of soft
metal, can be driven by blows with the hammer.
The forms of the recesses and projections shewn at Figs. 2 to 5 may also be
employed with this second method of operating.
Dated this 24th day of January 1894.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of Composite Plates, Bars, Slabs, Sheets, and the like,
of Metals Welded Together.
I, ADOLF RODIG, of Laband, in the Kingdom of Prussia, and Empire of
Germany, do hereby declare the nature of this invention and in what inanner
the same is to be performed to be particularly described and ascertained in and
by the following statement :-
In the manufacture of plates, bars, slabs, sheets, and the like, of metals welded
together, a plate or ingot &c. of the one metal has heretofore always been placed
in a mould, and the other metal or metals have been cast upon its surface or
surfaces, after which the composite plate &c. has been subjected to rolling
processes. In this process of manufacture the adhesion of the metal covering
plate to the flat surfaces of the ingot has alone been relied upon to keep the parts
together during the rolling process.
In some cases it is found that the metals do not sufficiently adhere together by
the simple process of casting, while, on the other hand, it is sometimes found
desirable that they should not so adhere, in order that by a subsequent rolling
process the covering metal may be enabled to stretch freely over the core metal so
as to cover it more completely before the said metals are welded together.
According to my present invention, I insure the connection of the surface
metal or metals to the core metal independently of any adhesion resulting from
casting, by forming upon the surfaces of the core metal grooves, recesses, ribs or
projections into or onto which the surface metal fits, either with simple dovetail
edges, or with corresponding ribs, projections grooves or recesses, these being so
formed with dovetailed, undercut, or wedging surfaces, as to hold the parts securely
together while they are undergoing the rolling or welding process.
My said invention can be carried out in two different ways, as I shall describe
with reference to the drawings accompanying my Provisional Specification.
According to the one method, I place the core or ingot having the said grooves
or ribs &c. formed upon it, into a mould, and I cast the covering metal or metals
upon it, as heretofore, the spaces in the mould for such covering metal being so
formed that this will effectually fit into or embrace the said grooves or ribs &c.,
so as to be securely held in position. According to the second method, instead of
casting the covering metal on to the core metal, I manufacture the same separately
as plates or sheets having the necessary configuration for fitting into or onto the
grooves, recesses, ribs, or projections of the core metal.
For carrying out the first described method of operating, the ingot is provided
with suitable furrows, grooves or recesses such as those shown in section

page_text: by Figs. 1 to 5 inclusive of the accompanying drawings. These need not extend
the whole length of the ingot, as it may sometimes be sufficient to arrange the
recesses or their equivalents only at some places, as shewn in side view in Fig. 6
and in section in Fig. 7.
Nor is it necessary to cast the surface metal the whole length of the ingot, it
is sufficient in certain cases, especially when the surface metal is soft, to cast it
only on the middle part of the core.
In order, when rolling, to prevent displacement of the metal cast on, when the
furrows or grooves extend the whole length of the core there should be provided
in the longitudinal furrows or grooves or elsewhere some transverse grooves by
which the casing metal would be held in position.
This however is not necessary when the recesses are partial as in Figs. 6 and 7.
For carrying out the second method of operating, the core metal or ingot may
be formed with a recessed surface with undercut or dovetail sides, while the
covering plates or sheets are either formed simply with bevilled or dovetail sides,
as at Fig. 8, or with a dovetail projection on the underside, as at Fig. 1, and they
are then slid longitudinally into the recesses of the ingot. When required, they
may be secured against shifting in the rolling process either by forming the recess
of the ingot with projections at one end as shewn in plan at Fig. 9, these being
tightened on to the covering plate before rolling by blows with a hammer, or the
recess of the ingot and the covering plate may be made slightly taper, as
shewn at Fig. 10, so that when the plate is driven into the recess it will be
wedged tight therein. Or again, the recess of the ingot may be made with slight
transverse notches, recesses or grooves, into which the metal of the covering
plate, when of soft metal, can be driven by blows with the haminer.
Recesses and projections of the forms shown at Figs. 2 to 5 may also be
employed with this second method of operating.
The covering plates of the more valuable metal may also be applied cold being
held on the core by means of the furrows, grooves or projections.
The composite ingot thus made is covered in an air tight manner with thin
metal sheets or plates as a protection against the injurious action of the heating
previous to rolling.
It is to be understood that the process above described applies chiefly to the
covering of cores such as iron or steel with metals that fuse at considerably lower
temperatures such as nickel, copper or alloys of these, the softer metal being in
all cases applied on opposite sides of the core.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The manufacture of composite plates, bars, slabs, sheets, and the like, of metals
by attaching the covering metal on both sides of the other metal or core by means
of suitable projections and recesses and then subjecting the composite ingot thus
produced to rolling, substantially as described.
Dated this 19th day of September 1894.
ABEL & IMKAI,
Agents for Applicant.