Improvement in the Sinking of Dies.
Year: 1893

page_text: Date of Application, 21st June, 1893
Complete Specification Left, 2nd Mar., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvement in the Sinking of Dies.
We, JOHN MAXFIELD of the Bole Hills, Crookes, Sheffield in the County of
York, Silver Plate Manufacturer, and ELLEN MAUD MAXFIELD, of the Bole
Hills, Crookes Sheffield in the County of York, do hereby declare the nature of
this invention to be as follows:-
We make the die from a block of steel, or of iron and steel, which is first formed
in a frame under a steam hammer, or other suitable tool to bring it to definite size
and form, ready to take the impression that we may want to put on it. Then we
make a mould of three pieces of steel (which we term No. 1, No. 2, and No. 3.) of
which the following is a description. We take a piece of flat steel No. 1, of
sufficient strength to resist the pressure to be brought against it. In it we make
provision for the placing of a block of metal that contains the pattern which we
intend to press into the die. We put on this piece of steel four npright studs.
Then we get another piece of flat steel No. 2, a little thicker than the die, we
intend to impress. In it we make four holes, which allow it to slide up and down
four upright studs on flat steel No. 1., and in the centre of No. 2, a hole is made
the shape and size of the die intended to be pressed. Then we take the the piece
of steel, No. 3, and so form it at the bottom end that it will fit in the hole in No. 2.
The middle portion of No. 3 is made so large as to leave room for No. 3 to slide up
and down the four upright studs on No. 1 in the same manner as No. 2 does. The
top portion of No. 3 is formed in such a manner that it may receive the blow from
a steam-hammer or any other machine for giving a downward pressure. The three
pieces of steel No. 1, No. 2, & No. 3 when put together form the frame or mould in
which the impression is to be taken.
To put an impression into a die we first place on the top of No. 1, a block of
metal which contains the pattern. Then place No. 2 on the top of No. 1 so that it
may slide on the four upright studs. Then take the die which has been raised to
the required heat, and place it in the hole in No. 2, then on the die we place No. 3,
which also slides on the four upright studs in No. 1. It is then placed under a
steam hammer or other machine by which pressure can be exerted sufficient to
force the impression contained on the block of metal into the die. The mould will
prevent the die working out of form and enable the die to take a perfect
impression, which it otherwise might not do if the die were not enclosed in a
mould.
Dated this 20th day of June 1893.
JOHN MAXFIELD.
ELLEN MAUD MAXFIELD.
COMPLETE SPECIFICATION.
Improvement in the Sinking of Dies.
JOHN MAXFIELD, the Bole Hills, Crookes, Sheffield, Silversmith, and
0 ELLEN MAUD MAXFIELD, the Bole Hills Crookes, Sheffield, 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:—
What we purpose doing is to form the dies in an enclosed frame or mould as
herein described. We make the dies from blocks of steel, or iron and steel, which
Price 811

page_text: are first formed to a templet under a steam-hammer or other suitable tool, ready to
take the impressions which we want to put into them. Then a mould is made of
which the following is a description (Fig. 1).
We get a piece of flat steel A; on it we make provision for placing a block of
metal D which contains the pattern to be pressed into the die. Next place in
steel A, four upright studs E; another piece of flat steel B is next obtained, a
little thicker than the die F to be impressed. In B make four holes which allow B
to slide up & down the four upright studs E. On B, and in the centre make a hole
the size and shape of the die F intended to be pressed. Then take another piece
of steel C and so form the bottom end that it will fit in the hole in B. The middle
portion of C (from c¹ to c²) is made so large as to leave room for C to slide up and
down the four upright studs E, in the same manner that B does. The top portion
of C is so formed that it can be struck by a steam hammer or other machine for
conveying downward pressure. To put the impression into the die we first place
on the top of A the block of metal which contains the pattern. Then place B on
Then take the die which has
the top of A so as to slide on the four upright studs.
Then in the die we
been raised to the required heat, and place it in the hole in B.
place C which also slides on the four upright studs E. It is then placed under a
steam hammer, or other machine for conveying downward pressure, and sufficient
power is exerted to force the impression contained on the block of metal into the
die. The mould will prevent the die working out of form, and enable the die to
take a perfect impression, which otherwise it would not do without the enclosing
mould. In order to prevent the hot die injuring the pattern on D, we place four
spiral springs H on studs E, of sufficient power to lift the hot die from pattern D.
For some patterns we use the mould in a simpler form. We take a flat piece of
steel K (Figs. 2 & 3) thicker than the die to be impressed. We make in it a hole
the shape of the die F that is to be formed to the templet and will fit in the hole
in the mould. We then place the block of metal L on which the pattern has been
formed, in such a manner that it can be held on the top of the die, which has been
placed in the mould. To sink a die in mould (Figs. & 3) we raise the die to the
required heat, and place the mould under the steam hammer or other machine for
conveying downward pressure, and the block of metal on which the pattern is
formed is held on the hot die, and sufficient power is exerted to force the pattern into
the die, the mould enabling it to take a perfect impression, as in the mould
Fig. 1.