MENTS IN MACHINES OR PRESSES FOR STAMPING OR EMBOSSING PAPER OR OTHER SUBSTANCES
Year: 1864

page_text: PROVISIONAL SPECIFICATION left by William Jones at the Office
of the Commissioners of Patents, with his Petition, on the 18th August
1864.
I, WILLIAM JONES, of 246, High Holborn, in the County of Middlesex,
Machinist, do hereby declare the nature of the said Invention for "IMPROVE
MENTS IN MACHINES OR PRESSES FOR STAMPING OR EMBOSSING PAPER OR OTHER
SUBSTANCES," to be as follows:-
.:This Invention consists of improvements in machines or presses for stamping
or embossing paper, or other substances where the pressure is obtained by
percussive force obtained by the reaction of a spring.
The first part of my improvements relates to those machines for which
former Letters Patent were granted to me for embossing or stamping paper,
or other substances, on the Sixth day of November One thousand eight
hundred and sixty, No. 2719. These machines have hitherto got the per-
cussive force by means of a semicircular spring, one end of which is made
fast to the bottom of the press, and the other end of the spring enters a hole
in the press plunger or die holder, and keeps it depressed on the back of the
die holder in a projection or stud, under which works a cam or tappet fixed
on a horizontal axis; on the outer end of the said axis is fixed a hand wheel,
which when turned by the hand causes the tappet to revolve, raises the die
holder, and compresses the spring until the tappet works clear of the pro-
jection on the back of the plunger, where the die holder and die falls by the
reaction of the spring on to a matrix fixed immediately under the die, and

page_text: gives an impression to paper or other substances placed between the matrix
and die.
The first part of my present improvements consists in making the press
with a circular aperture in a vertical line with the die holder, and concentric
therewith; in this aperture I place a spiral spring, one end of which presses
on the top of the die holder, and the other end of the spiral spring abuts
against the end of a screw working through a plug fixed on the top of the
aperture; by turning this screw the strength of the spring can be increased
or diminished so that cardboard can be embossed with the same facility as
the thinnest paper.
The second part of my Invention consists in the application of a lever to raise
the plunger or die holder instead of the horizontal axis and wheel and tappet,
as in my former Patents. This lever works on a fulcrum fixed in a mortice
cast in the press in the rear of the die holder; the short end of the lever is
made with a cog-shaped tooth, which works under a stud fitted to the die
holder; by applying force to the longer end of the lever the die holder is
raised, and the spiral spring compressed until the lever. tooth works clear of
the stud, when the die holder falls by means of the reaction of the spiral
spring, and gives the impression, the lever returns to its first position, when
the force is withdrawn, by means of a light spring fixed under it; the stud in
the die holder is so arranged as to slide backwards and forwards in the die
holder, to enable the tooth of the lever to pass it in its return, when the tooth
passes it the stud is forced back to its proper position by means of a small
spring inserted in the front of the die holder, or the tooth can be made to
shift in the lever, and in that case the stud in the die holder would be a
fixture.