Improvements in Connecting Punches and Punch Holders to. Drawing Presses.
Year: 1888

page_text: Date of Application, 31st July, 1888
Complete Specification Left, 30th Apr., 1889-Accepted, 29th June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Connecting Punches and Punch Holders to.
Drawing Presses.
Wo JOSEPH SAMUEL TAYLOR, and STEPHEN WILLIAM CHALLEN, both of Derwent
Foundry, Constitution Hill Birmingham, in the county of Warwick, Engineers do
hereby declare the nature of this invention to be as follows:-
Our invention relates to the manner in which we construct and arrange the punch
and punch holder for use in hydraulic, crank, screw, excentric, or levor presses for
drawing or extending shells for metallic cartridge cases, tubes, or other similar
articles; whereby we are enabled to considerably shorten the length of stroke of
such presses and thus to expedite the process of manufacture and increase the output
from the press or machine.
In carrying our invention into effect, we employ any kind of punch whether
requiring to be carried in a holder or not, with equal advantage; but we' will
describe our application particularly, to a punch used upon a horizontal screw press,
for forming or drawing metallic cartridge cases.
The punch for extending the case we attach to the holder by any usual ordinary
method; but the holder wo connect to the end or head of the screw by means of a
pin passing through a hole in the jaw shaped projection from the screw head and the
punch head, which is held between the jaws.
The end or head of the screw we construct in the form of a jaw having a pin hole
through the centre of same, and the punch we construct of suitable shape and with
a corresponding hole to enter the jaw; we then pass a pin through the central hole
and connect theni together.
The head of the punch we construct in such a manner that it is free to turn" or
hinge upon the pin as a centre in one direction only; being prevented from movement
in the other direction, by a square shoulder or thrusting face that we form upon its
end.
•
*This square shoulder or thrusting face projects beneath the underside of the punch
and forms a solid abutment to receive the power from the screw, and also keeps
the punch in true central line with the die and the screw.
The hinged projection we form either in the centre line of punch, or away from it;
in each case being careful to bring the shouldered head of punch in true and close
contact with the head of the screw.
In working with our improved punches and punch holders, the stroke need not be
of such length as to admit of the full length of the case between the end of the
punch and the die, for the introduction of the case to be operated upon; but
directly the punch has returned back out of the die; it may be moved upon its pin,
out of the line of die and thus the case that is to be drawn, put on, without coming
in contact with anything.
The application of our invention to slides or rams of pressés used' for 'forming
"metallic cases, tubes and other similar articles by hydraulic, "lever, crank or other
"presses differs in no essential respect to its application to a 'horizontal screw press as
-hereinbefore described.

page_text: COMPLETE SPECIFICATION.
Improvements in Connecting Punches and Punch Holders to
Drawing Presses.
We JOSEPH SAMUEL TAYLOR and STEPHEN WILLIAM CHALLEN both of Derwent
Foundry, Constitution Hill Birmingham in the County of Warwick Engineers, 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 :-
Our invention relates to the manner in which we construct and arrange the punch
and punch holders for use in hydraulic, crank, screw, eccentric, or lever presses for
drawing or extonding shells for metallic cartridge cases, tubes, or other similar
articles whereby we are enabled to considerably shorten the length of stroke of such
presses and thus to expedite the process of manufacture and increase the output from
the press or machine.
In carrying our invention into effect we employ any kind of punch whether
requiring to be carried in a holder or not, with equal advantage, but we will describe
our application particularly to a punch and upon a horizontal screw press for forming
or drawing metallic cartridge cases.
The punch for extending the case we attach to the holder by any usual ordinary
method but the holder we connect to the end or head of the screw by means of a
pin passing through a hole in the jaw shaped projection upon the screw head and
the punch head which is held between the jaws.
The end or head of the screw we construct in the form of a jaw having a pin hole
through the centre of same and the punch we construct of suitable shape and with
a corresponding hole, to enter the jaw, we then pass a pin through the central hole
and connect them together.
"
The hoad of the punch we construct in such a manner that it is free to turn or
hinge upon the pin as a centre in one direction only being prevented from movement
in the other direction by a-square-shoulder or thrusting-face-that-we-form-upon-its-
end.
This square shoulder or thrusting face projects beneath the underside of the punch
and forms a solid abutment to receive the power from the screw, and also keeps the
punch in true central line with the die and the screw.
The hinged projection we form either in the centre line of punch, or away from
it; in each case being careful to bring the shouldered head of punch in true and
close contact with the head of the screw.
In working with our improved punches and punch holders, the stroke need not be
of such length as to admit of the full length of the case between the end of the
punch and the die for the introduction of the case to be operated upon, but directly
the punch has returned back out of the die, it may be moved upon its pin out of
the line of die, and thus the case that is to be drawn, put on without coming in
contact with anything.
The application of our invention to slides or rams of presses used for forming
metallic cases, tubes and other similar articles, by hydraulic, lever, crank or other
presses, differs in no essential respect to its application to a horizontal screw press as
hereinbefore described.
In order that our invention and the manner of performing the same may be
properly understood we hereunto append one sheet of explanatory drawings to be
hereinafter referred to and representing examples of the application of our invention.
Figure 1 is an elevation of the end of the press screw showing the punch attached
to it direct and
Figure 2 is a sectional plan of the same.
Figure 3 is an elevation of the end of the press screw having a holder attached to
it into which the punch is secured, and Figure 4 is a sectional plan, and Figure 5

page_text: opening D within it, this jaw being suitably formed with a flat surface or shoulder F
at the one side to act as a thrusting face, and to prevent the punch from being
moved or falling down; on the opposite side of the jaw a circular or curved face &
is formed against which the correspondingly curved or circular face on the end of
the punch rests. A pin C passes through the screw end and through the punch end,
thereby connecting one to the other; and about this pin as a centre, the punch is
free to turn in one direction, viz. that of the curved or concentric face G on the end
of the screw, while the straight face or shoulder F prevents movement in the other
direction.
Instead of connecting the punch direct to the screw end we sometimes employ
a holder for receiving it, and this holder we attach to the end of the screw in the
same manner as hereinbefore described when attaching the punch direct to the screw
end.
In Figures 3. 4 and 5 the same letters of reference indicate the same parts,
and H is the holder into which the punch B is attached and secured by means of
the taper pin L, passing through the shouldered end K held within the end of the
holder.
We do not limit the application of our invention to presses having screws only
but employ the movable punch or holder with equal advantage to any kind of press
whether hydraulic, lever, or crank, seeing that the stroke may in every case be
shortened as hereinbefore described when introducing the object which is to be
operated upon.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The use in all kinds of presses, of a swivelling or turning punch, or punch
holder, which while allowing a free motion in one direction affords a rigid and firm
thrusting surface when working, substantially as and for the purpose hereinbefore
described and illustrated in the accompanying drawings.
2. The use in cartridge and other case forming or drawing machines of a swivelling
punch or former, or of a holder for the same, substantially as and for the purpose
heroinbefore described.
Dated this 20th day of April 1005.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicants.