A NEW OR IMPROVED METHOD OF PRESSING PLATES OF TIN, COPPER, OR OTHER METAL TO ANY DESIRED SHAPE OR MOULD FOR DENTAL, JEWELLRY, AND OTHER PURPOSES. AND IN APPARATUS THEREFOR."
Year: 1879

page_text: LETTERS PATENT to William Robinson Humby and Harry Rose, both of
Albany Street, Regents Park, London, Dentists, for the Invention of "A NEW
OR IMPROVED METHOD OF PRESSING PLATES OF TIN, COPPER, OR OTHER
METAL TO ANY DESIRED SHAPE OR MOULD FOR DENTAL, JEWELLRY, AND
OTHER PURPOSES. AND IN APPARATUS THEREFOR."
PROVISIONAL SPECIFICATION left by the said William Robinson Humby
and Harry Rose at the Office of the Commissioners of Patents on the 12th May
1879.
WILLIAM ROBINSON HUMBY and HARRY ROSE, both of Albany Street, Regents
Park; London, Dentists. "A NEW OR IMPROVED METHOD OF PRESSING PLATES
OF TIN, COPPER, OR OTHER METAL TO ANY DESIRED SHAPE OR MOULD FOR
DENTAL, JEWELLRY, AND OTHER PURPOSES, AND IN APPARATUS THEREFOR."
Our Invention relates to a new or improved method of pressing plates of tin,
copper, or other metal to any desired shape or mould for dental, jewellry, typo
copying, or other purposes, and in the construction and arrangement of apparatus
employed therefor.
It consists in the application and use of steam generated in or admitted to a box
or flask made in two halves or portions, one of which is filled with the shape or
mould (made of plaster of Paris or other suitable material) of the dental appliance,
jewel, type, or other article to be faced or coated with the metal plate.
The tin, copper, or other metal plate being placed over the shape or mould is
held in that position by the melting edges of the two halves or portions of the box
or flask, which hermetically close together on the said plate, and are secured by an
encircling ring tightened by a central screw, or by lugs and bolts, or by any other
description of fastening found most effective.
Steam is then either generated from water contained in the other half or portion
of the box or flask, or is admitted to the latter from a steam boiler at any required

page_text: pressure when pressing upon the metal plate; the latter is thereby forced into every
part of the shape or mould until accurately impressed and conformed thereto, as if
impressed and worked by the ordinary method. The box or flask may be made of
a spherical, square, rectangular, circular, or any other desirable shape, according to
the configuration and requirements of the mould to be covered with the metal
plate. A thermometer or pressure gauge may be inserted at the side or other con-
venient part of that portion of the box or flask containing the steam, for the purpose
of determining the temperature and pressure required.
If desired compressed air may be used in lieu of steam for pressing the metal
plate to the mould or shape.

page_text: SPECIFICATION in pursuance of the conditions of. the Letters Patent filed by
the said William Robinson Humby and Harry Rose in the Great Seal Patent
Office on the 12th November 1879.
WILLIAM ROBINSON HUMBY and HARRY ROSE, both of Albany Street, Regents
Park, London, Dentists. "A NEW OR IMPROVED METHOD OF PRESSING PLATES.
OF TIN, COPPER, OR OTHER METAL TO ANY DESIRED SHAPE OR MOULD FOR
DENTAL, JEWELLRY, AND OTHER PURPOSES, AND IN APPARATUS THEREFOR,"
Our Invention relates to a new or improved method of pressing plates of tin,
copper, or other metal to any desired shape or mould for dental, jewellry, type
copying, or other purposes, and in the construction and arrangement of apparatus
employed therefor.
It consists in the application and use of steam generated in or admitted to a box
or flask made in two halves or portions, one of which is filled with the shape or
mould (made of plaster of Paris or other suitable material) of the dental appliance,
jewel, type, or other article to be faced or coated with the metal plate. The latter
being placed over the shape or mould, steam is either generated from water contained
in the other half or portion of the box or flask or is admitted to the latter from a
steam boiler at any required pressure; when pressing upon the metal plate the
latter is thereby forced into every part and indentation of the shape or mould until
accurately impressed and conformed thereto as if moulded and worked by the
ordinary method.
And in order that our said Invention inay be well understood we shall now
proceed more particularly to describe the same, reference being made to the
accompanying Sheet of Drawings, on which Figure 1 represents a side sectional
elevation of one form of apparatus used in carrying out our Invention.
A, A, is a box or flask made in two halves or portions A and A, the upper half
or portion A being filled with the shape or mould A2 of the dental appliance, made
of plaster of Paris or other suitable material, to be faced or coated with the tin,
copper, or other metal plate B, which is placed over the shape or mould and held in
that position by the meeting edges of the two halves or portions A and A' of the
box or flask A, A¹, these edges hermetically closing (as it were) together on the
plate B, and secured or tightened thereto by the central set screw C working
through the bridle yoke D, which is pivoted to the lower half or portion A¹ of the
box or flask A, A¹, as shewn; or they may be secured or tightened thereto by an
encircling ring, lugs, and bolts, or by any other device found most suitable.
By means of gas admitted through pipe D¹ and ignited beneath the box or flask
A, A¹, or by any other convenient medium of heat, steam is then generated from the
water contained in the lower half or portion A¹ of the box or flask A, A', until it
arrives at any required pressure; when pressing upon the tin, copper, or other
metal plate B, the latter is thereby forced into every part and indentation or depres-
sion of the shape or mould contained by the upper half or portion A of the box or
flask, and accurately impressed and conformed to the said shape or mould as if
impressed and worked by the ordinary method.
If preferable the steam in lieu of being generated in the box or flask A, A', as
described, may be admitted thereto from a steam boiler; or compressed air may be
used in lieu of steam for pressing the metal plate B to the mould or shape.
The box or flask A, A³, may be made of a spherical, square, rectangular, or any
other desirable shape, according to the configuration and requirements of the mould
to be covered. A thermometer E (or pressure gauge) may be inserted at the side
(as shewn) or other convenient part of the lower half or portion A¹ of the box or
Bask A, A, for the purpose of determining the temperature and pressure required.

page_text: Having now described and particularly ascertained the nature of our said Inven-
tion, and the manner in which the same is or may be used or carried into effect, we
would observe in conclusion that what we consider novel and original, and there-
fore claim as our Invention is,--
The application and use of steam for pressing plates of tin, copper, or other
-metal to any desired shape or mould, substantially as and for the purposes herein-
before described and illustrated by the accompanying Drawing.
In witness whereof, we, the said William Robinson Humby and Harry Rose,
have hereunto set our hands and seals, this Thirtieth day of October, in the
year of our Lord One thousand eight hundred and seventy nine.