IMPROVEMENTS IN THE MANUFACTURE OF DISH COVERS, DISHES, PLATES, AND OTHER ARTICLES OF SHEET METAL, AND IN THE MACHINERY OR APPARATUS EMPLOYED THEREIN
Year: 1855

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PROVISIONAL SPECIFICATION left by John Henry Johnson at the Office
of the Commissioners of Patents, with his Petition, on the 19th June
1855. A communication.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of
Middlesex, and of Glasgow, North Britain, Gentleman, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
DISH COVERS, DISHES, PLATES, AND OTHER ARTICLES OF SHEET METAL, AND IN THE
MACHINERY OR APPARATUS EMPLOYED THEREIN," a communication from Fleury
Victor Alard, of Paris, in the Empire of France, Engraver, to be as follows:-
This Invention relates to the manufacturing of such articles as dish covers,
dishes, plates, vases, &c. out of sheet iron or other metals by pressure in a
suitable machine.
The improvements consist in covering such articles composed of sheet iron
with copper, German silver, nickel, or other suitable metal, which may then be
plated or gilt in the ordinary manner adopted for articles composed entirely of
copper or German silver, by which means the first cost is greatly reduced, and
the solidity and strength of the article produced greatly increased. It is
proposed to employ a pair of cylinders, worked by levers and cranks or other
suitable contrivance, which will impart a reciprocating motion thereto for the
purpose of reducing the metal plates: For effecting the stamping or shap

page_text: of the articles, it is proposed to use matrices which are formed by stamps,
punches, or dies of steel, whereby their construction is rendered more simple
and economical, and at the same time they may be made smaller and lighter
than the matrices at present employed.
The cylinders or rollers operate only at one of their ends beyond the
standards, in place of in the middle between the standards, and in place of
receiving a continuous rotatory motion they are actuated by an alternate
rotatory or reciprocating motion.
.
A piece of steel is let into or fitted on to one end of the lower roller for the
purpose of forming the pressing surface, whereby the rollers themselves may
be composed entirely of wrought or cast iron. This piece of steel may be
changed at pleasure, and corresponds to the shape of the article to be pressed.
A small guide or stop for the articles submitted to the action of the rollers is
fitted on to the end of the lower roller, such articles being presented in the
direction of the axes of the rollers.
A stop or guage piece is fitted into the circumference of the lower roller,
for the purpose of regulating the position of the article to be inserted. The
rollers work in suitable bearings, and the pressure is produced by screw
spindles. The matrices are made by pressure under punches or dies, corre-
sponding exactly to the hollow to be made in them.
Covers or dishes and other large articles are made of iron, in the following
manner: The sheet is first cut out by a machine, somewhat similar to the
compressing machine herein-before described, and the roughness removed from
the surface by a planing machine. The plate is then hammered or stamped
into shape in the matrices herein-before described. The object is then
covered over with copper, or any other metal suitable for subsequent plating
or gilding, and again hammered or stamped.