Manufacture of Bands, Plates, Sheets, and Foils of Combined Metals.
Year: 1891

page_text: Date of Application, 6th Oct., 1891
Complete Specification Left, 24th Nov., 1891-Accepted, 24th Dec., 1891
PROVISIONAL SPECIFICATION.
Manufacture of Bands, Plates, Sheets, and Foils of Combined Metals.
I, EDOUARD MARTIN of No. 13 Rue des Petits Ecuries, Paris, France,
Metallurgist, do hereby declare the nature of this invention to be as follows:-
My invention relates to a manufacture of band plates, sheets and foils of
combined metals, which are composed of a core of steel, iron, or other metal or
alloy, covered either on all its faces or on two or four faces, with a coating of copper
or other similar metal or alloy, and which I term "bi-metallic."
For producing these bi-metallic sheets or plates, I proceed as follows. I cast
round the steel or other core in a mould the said covering of copper &c., a portion
of the core being made to project beyond the mould at each end, so that
on the removal of the mould, which is divided longitudinally, the core will have a
covering of copper &c. only on its middle portion. The compound ingot thus
produced is then reheated and is passed through a rolling mill, the rolls of which
have grooves so formed as to flatten down the ingot, causing it to assume a flat oval
cross section. At the same time the copper coating will have extended along the
projecting ends of the core so as eventually to entirely cover the same.
In order to prevent the copper covering from being squeezed off in the form of
fins, the rolls are so formed that the one roll contains a groove of the required
width but of increased depth, while the other roll has a corresponding projection
fitting into the groove to such an extent as to leave an opening of the required
depth enclosed on all four sides.
Under the double action of rolling and heating, the two metals will be found not
only to be united by adhesion but also combined by alloying with each other, that
is to say, at the point of union of the two metals it will be found that the copper
will have penetrated into the iron or steel, thus intimately uniting the same
together.
When the core has become completely covered by the copper coating, the
compound plate is further rolled out to a certain thickness and is then cut into
strips of the size and weight required for producing the bands, plates, sheets or foils
desired. These strips or pieces are then rolled out in both longitudinal and
transverse directions, until they are brought to the size and thickness required, such
rolling being effected either cold or under heating.
The iron or other core and the coating covering the same may be originally of
any desired transverse sectional form, such as square with flat or curved sides, or of
a flat rectangular section &c.
Plates or sheets produced by the above described method may be treated in any
desired manner as though they were of homogeneous metal, for producing a great
variety of objects.
They are applicable in all industries where tin plate, sheet iron, sheet copper,
sheet brass &c. are used, being of great strength and, in cases where they are
substituted for solid copper or brass sheets, causing considerable economy in
manufacture.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Manufacture of Bands, Plates, Sheets, and Foils of Combined Metals.
I, EDOUARD MARTIN of No. 13 Rue des Petits Ecuries, Paris, France,
Metallurgist, 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.:-
My invention relates to a manufacture of bands, plates, sheets and foils of
combined metals, which may be termed bi-metallic and are composed of a core or
foundation of steel, iron or other suitable metal or alloy covered with a coating of
copper or other suitable metal or alloy.
For producing these bi-metallic sheets or plates I proceed as follows:-I cast
round the steel or other core in a suitable mould the covering of copper or other
metal, a portion of the core projecting beyond the mould at each end so that, on
the removal of the mould which is divided longitudinally, only a part of the core is
covered by the other metal. The compound ingot thus produced is then, if
necessary, reheated and passed through rollers which cause the ingot to assume
approximately a flat oval cross section. The coating metal is thus extended
along the projecting ends of the core so as eventually to entirely cover the
core.
In order to prevent the covering metal from being squeezed off in the form of
fins the one roller of each pair is deeply grooved, while the other roller has a
corresponding collar projecting into the groove to such depth as to leave an opening
through which passes the ingot thus enclosed on all four sides.
By the above process the two metals become united by a species of welding.
When the core by rolling has become completely covered by the coating metal,
the compound plate is further rolled out to a certain desired thickness and is then
cut into strips of the size and weight required for producing the bands, plates sheets
or foils desired. These strips or pieces are then rolled out in both longitudinal and
transverse directions until they are brought to the size and thickness required, such
rolling being effected either cold or under heating.
The iron or other core and the metal covering it may be originally of any desired
transverse section, such as square, rectangular or polygonal with sides flat or curved.
It is however generally preferable to make both the core and the covering metal of
a section approximately elliptical, and to apply the rolling pressure in the first
instance in the line of the longer axis.
The core may be a tube which, along with its metal covering, may be drawn out
as required and if necessary. flattened. It could then be cut so as to form a plate
or pair of plates with the covering metal on one side only.
The plates or sheets produced by the above described method may be treated.
generally as if they were of homogenous metal.
They are applicable for purposes for which tin plate, sheet iron, copper brass &c.
are used.
They are of great strength and, in cases where they are substituted for
plates, or sheets entirely of copper or brass, great economy in manufacture is
effected.
Having now particularly described and: ascertained the nature: of this inven
tion and in what manner the same is to be performed, I declare that what I
claimiss
The manufacture of bands, plates sheets and foils of combined metals by casting
on a core of iron, steel or other suitable metal a thick covering of copper or other
suitable metal or alloy shorter than the core, extending this covering. by rolling

page_text: until it covers the whole length of the core, then rolling down the compound ingot,
cutting it into portions, and rolling and cross rolling these to the desired dimensions,
substantially as described.
Dout
AT
1901
ABEL & IMRAY,
Agents for the Applicant.