Gunpowder.
Year: 1885

page_text: Gunpowder.
I, EDOUARD MARTIN, of Paris in the Republic of France, Artizan, do hereby
declare the nature of this invention to be as follows:-
This invention relates to the construction of cartridge cases and other receptacles
for gunpowder in such a manner as to avoid corrosion or other chemical action.
For this purpose the plate of iron, steel, or other metal that is to be used for
making the case or receptacle is coated on either or both sides with a metal that
is not readily oxidisable such as platinum, gold, silver or nickel, in the following
manner. The plate, of iron for instance, is carefully cleaned and has carefully
deposited on it by electroplating, a soldering material consisting of a thin layer of
metal, for example, copper, that is fusible at a lower temperature than the plate or
its intended coating. On the plate thus prepared, after careful cleaning, is laid a
thin sheet of the coating metal, such as nickel.
A number of these compound plates are packed together in a casing with
interposed plates coated with suitable material to prevent any compound plate from
becoming soldered to the next. The mass of compound plates is then heated in a
furnace to a temperature depending on the metals employed, and while hot is
subjected to pressure in a hydraulic press or to the blow of a hammer. The plate
and its coating metal are thus soldered together constituting a composite plate
which can be rolled, stamped or otherwise treated as a simple plate.
... 611 1
100-
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improvement in Cartridge Cases and other Receptacles for
Gunpowder.
I, EDOUARD MARTIN, of Paris in the Republic of France, Artizan, 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 the construction of cartridge, cases and other
receptacles for gunpowder in such a manner as to avoid corrosion or other
chemical action. For this purpose the plate. of iron, steel or other metal that is
to be used for making the case or receptacle is coated on either or both sides with
a metal that is not readily oxidisable such as platinum, gold, silver or nickel, the
means employed to effect such coating being such as to insure the perfect
adherence thereof and prevent the occurrence of air bubbles or other imperfections
between the surfaces in contact.
When the metal to be coated is in the form of sheets, I operate as follows:-
The metal to be coated is in the first place perfectly cleaned, and upon the
cleansed surface or surfaces I deposit by electrolyses a thin coating of gold, silver,
copper, nickel or of any other metal serving as the soldering material for insuring the
adherence of the coating of the precious metal to be employed. Thus for coating
iron or steel with nickel I deposit on the former a galvanic coating of copper, of
silver or of nickel, which, when the completely coated plate has been subjected to a
high degree of heat will insure a perfect union of the two metals.
After the galvanic deposit has been effected there is laid upon it, after, careful
cleaning, the sheet of nickel, and a number of these compound plates are packed
together in a casing with interposed plates coated with a suitable uaterial to
prevent the union of two of the compound plates, and they are then heated to a
greater or less degree according to the nature of the metals employed, whereupon
the two sheets of metal of the compound plate will be effectually soldered together,
and the compound plate produced may then be subjected to any rolling, stamping,.
or other operation required for converting the sheet into cartridge cases or other
objects required.
There might also be interposed between the copper coated steel plate and the
plate of the nickel a very thin coating or skin of pure silver to serve as soldering
medium, or two coatings of different metals, such as copper and zinc or copper and
silver or gold might be deposited upon each other by electrolyses to serve as
soldering medium. In coating a copper plate with nickel, there might be deposited
on the copper plate by electrolyses or otherwise, a thin coating of galvanic copper
or of a more fusible metal such as tin or zinc,

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
The use for the manufacture of cartridge cases and other receptacles for
containing powder, of a metal such as copper, iron, steel, brass, gun metal and the
like coated on one or both sides with a precious metal such as platinum, silver,
nickel and the like, the union of the two metals being effected by the interposition
of a thin coating of metal that will melt when heated to a certain degree, and will
act as a soldering medium,