IMPROVE- MENTS IN THE MEANS OF PRODUCING RAISED CHASING ON BRITANNIA AND OTHER COMPRESSIBLE METALS
Year: 1862

page_text: LETTERS PATENT to John Carpendale, Britannia Metal Smith, of Meadow
Street, Sheffield, in the County of York, for the Invention of "IMPROVE-
MENTS IN THE MEANS OF PRODUCING RAISED CHASING ON BRITANNIA AND
OTHER COMPRESSIBLE METALS."
Sealed the 16th January 1863, and dated the 25th October 1862.
COMPLETE SPECIFICATION filed by the said John Carpendale at the Office
of the Commissioners of Patents, with his Petition and Declaration, on
the 25th October 1862, pursuant to the 9th Section of the Patent Law
Amendment Act, 1852.
I, JOHN CARPENDALE, Britannia Metal Smith, of Meadow Street,
Sheffield, in the County of York, do hereby declare the nature of my Inven-
tion for "IMPROVEMENTS IN THE MEANS OF PRODUCING RAISED CHASING ON
BRITANNIA AND OTHER COMPRESSIBLE METALS," to be as follows:-
This Invention consists of a mechanical contrivance by which the mode
of producing "raised chasing" by mere manual pressure hitherto partially
resorted to is superseded, and the use of steel plates or dies, with the
negative of the ornament to be impressed on the metal engraved or cut
therein is made practically available. The first motion from the driving

page_text: shaft is applied to drums in the usual manner, on the axis of which is fixed a
disc of wood or other material in which the steel plate or die is embedded;
parallel to the face of this disc a slotted guide is placed, in which a block
containing the pressing tool is fixed, the block is moved in the slotted guide
by a screw with a crank handle, and another screw acts upon the head of the
pressing tool. Upon the face of the steel plate, cut or engraved with an
appropriate design, the metal to be operated upon is fixed, and the pressing
tool screwed upon it with such an amount of pressure as may be necessary
to produce a true positive impress of the design cut in such plate or die.
The manner in which my said Invention may be carried into effect is
particularly described, and may be ascertained in and by the following
statement, reference being had to the accompanying Drawings, and to the
letters and figures marked thereon, that is to say :-
Figure 1 is an horizontal view or plan of the machine; Figure 2, an eleva-
tion looking from A 1 to A 2, (see Figure 1); Figure 3 is an elevation looking
from A 3 to A 4, (see Figure 1); Figure 4, shews the steadying plate;
Figure 5 is a section on the line B, B, (Figures 2 and 6); Figure 6 presents
a view of a steel plate C, imbedded in the disc D. The disc or bed D is
affixed to the axis E, and caused to revolve by ordinary well known means.
The axis E, and drums F, F, which receive the driving band are attached to
a strong frame G, G, which is firmly secured to the bench or table H. The
arms I, K, are fixed to the frame, and are formed with holes equidistant as
shewn, the slotted guide or forked lever L turns on the arm K, and bears
on the arm I, its distance from the disc D is regulated by pins or cotters
placed in the holes in the manner shewn. The tool or instrument M, to
which, when the lever L is adjusted, pressure is applied by means of the screw
N, is drawn along the back of the metal O by turning the handle P, the screw
of which acts on the slide block or nut Q, in which the tool is fixed; when the
steel plate is fixed in the disc, and the metal fixed thereon, the steadying plate
S is pressed against it, the machine adjusted, and the disc set in motion. The
slide block is then moved in the lever L, and the tool M caused to press on
the metal O and force it into the indentations on the plate; when the metal is
removed ornaments corresponding with the design on the steel plate are raised
on the surface which had been in contact therewith.
.
Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried
into effect I would observe that I do not confine myself to the precise details
which I have had occasion to describe or refer to, but what I claim to be

page_text: novel and original and therefore claim as my Invention is, the arrangement
and construction of a machine to produce "raised chasing" on metals sub-
stantially in the manner herein-before described and delineated in the accom-
panying Drawings.
In witness whereof, I, the said John Carpendale, have hereunto set
my hand and seal, this Thirteenth day of October, One thousand eight
hundred and sixty-two.
Witness,
CHAS. NODDER.
JOHN CARPENDALE. (L.S.)