Improvements in Presses for Punching and other Purposes.
Year: 1894

page_text: Date of Application, 12th May, 1894
Complete Specification Left, 12th Feb., 1895-Accepted, 27th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Presses for Punching and other Purposes.
I ARTHUR KEATS of Albion Works, Stafford, in the County of Stafford,
Machine Maker, do hereby declare the nature of this invention to be as
follows:-
The object of the present invention is first of all to provide, in a punching or:
other press, means for holding the work in place between the plunger and the anvil,
before the pressure is applied, so that any likelihood of the work being disarranged
or displaced by the blow of the plunger may be avoided; the invention further
relates to means whereby the plunger is operated and withdrawn, and the length
of stroke proportioned to the thickness of the work and the amount of pressure
required.
In carrying out my invention, I make the plunger telescopic, so that the lower
portion may be raised to arrange the work in position, and lowered to hold it there,
without moving the upper portion, through which the pressure is obtained. The
working end of the plunger may be jointed to the lower portion before mentioned,
in order that it may be turned aside to facilitate change or removal of the working
tool.
The upper part of the plunger is carried by one of a pair of links forming a
toggle lever, the other link of which is jointed to an adjustable abutment, by means
of which abutment, the stroke of the plunger may be adjusted to suit the work in
hand.
The stroke or blow of the plunger is caused by straightening the toggle lever
by means of a horizontally moved rod, which is connected with the middle joint of
the toggle lever in a peculiar manner.
It will be understood that the horizontally moved rod which operates the toggle,
works always in the same plane, but it will be remembered that the abutment
against which the toggle lever works, is an adjustable one, the shifting of which
must necessarily change the position of the lever joint, and bring it out of the line
of the thrust of the operating rod. To meet this change of position, the thrust
bar is provided with a vertically sliding block, through which passes the pivot pin
forming the joint of the toggle lever. The thrust bar which operates the toggle
lever is operated in the following manner :-
Upon the said bar are loosely mounted a pair of belt pulleys, driven in opposite
directions in any suitable manner. Between these pullies, is a double-coned friction
clutch wheel, coupled to a sleeve on the said bar or shaft by means of a feather.
This friction clutch is thrown, by means of a treadle, against one or other of the
driven pullies, whereby it is rotated, and caused to rotate the sleeve before
mentioned. This sleeve is internally threaded at one part, to correspond with a
thread on the thrust bar, which is thus caused to move in a longitudinal direction,
to operate the toggle lever.
A tripping device is arranged in connection with the clutch mechanism, to throw
it out of action, when the stroke of the plunger is complete in either direction.
Dated this 12th day of May 1894.
NEWTON & SON,
Agents for the Applicant.

page_text: Improvements in Presses for Punching and other Purposes,
I ARTHUR KEATS of Albion Works, Stafford, in the County of Stafford,
Machine Maker, 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:
The object of the present invention is first of all to provide, in a punching or
other press, means for holding the work in place between the plunger and the
anvil, before the pressure is applied, so that any likelihood of the work being.
disarranged or displaced by the blow of the plunger may be avoided; the invention
further relates.to means whereby the plunger is operated and withdrawn,, and the
length of stroke proportioned to the thickness of the work and the amount of
pressure required.
In the accompanying drawings 1 have shown my improvements embodied in a
press for heeling boots and shoes.
Fig. 1 is a side view;
Fig. 2 is a side view, on a larger scale, of a portion of the press in section.
Figs. 3 and 4 shew, detached; the plunger in two,positions.
Figs. 5 and 6, and 7 and 8, are front and side, and side and plau, views of details
to be presently described.
A is the framing of the machine, which comprises suitable supports for the
anvil or die containing nails to be driven into the work. B is the die, which is.
shown filled with heel lifts, to be attached by nailing to the work in the ordinary.
way. The nails and the means for supporting them. are not shown.
Immediately over the die is the plunger C, which moves vertically in guides
provided in the framing. This plunger Cis. telescopic, the lower portion of
which, c, carrying the working end c, slides within the upper part o*, a light
tension spring c² being provided to support the weight of the parts c and c, when
not at work. A transverse pin or stop is provided.to prevent the..part..c turning
within the part e*. The working end c', which carries the boot, is jointed to; the
portion of the plunger, to enable it to be turned aside while the anvil or die is
being removed or changed.
The upper part of the plunger C.is jointed to the link. b, which is one of a
pair bb, forming together a toggle lever. The link 6 is jointed to the adjustable
abutment d, which is pendent from the end of the screw D. (see Fig. 2). The
rotation of this sorew, in one direction or the other, by means of the wheel d¹,
raises or lowers the abutment, to determine the throw of the, toggle: lever and, the
adjustment of the plunger to the thickness of the work or the amount of pressure
required.
is a pinion on a spindled worked by a hand wheel. (see Fig. 1), for
rotating the wheel d and screw D; when required.
"
The stroke or blow of the plunger C is caused by straightening the toggle lever
by means of a horizontally moved rod E, which is connected with the middle, joint
of the toggle lever in a peculiar manner. It will be understood that the
horizontally moved rod E, which operates the toggle, works always in the same
plane, but it will be remembered that the abutment d, against which the toggle
lever works, is an adjustable one, the shifting, of which must necessarily, change
the position of the lever joint, and bring it out of the line of the thrust of the
operating rod E. To meet this change of position, the thrust bar is provided with
a guide F (see Figs. 7 and 8) for the vertically sliding block, carried by the
pivot pin 6 (see Figa. 5 and 6) of the toggle lever. The thrust bar E, which
operates the toggle lever, is operated in the following manner :-
Upon the said bar are loosely mounted a pair of belt pulleys G G', driven in

page_text: opposite directions in any suitable mauner. Between these pulleys, is a double
coned friction clutch wheel H, coupled to a sleeve E' on the said bar or shaft E
by means of a feather. This friction clutch H is thrown, by means of a treadle I,
against one or other of the driven pullies G G¹, whereby it is rotated, and caused
to rotate the sleeve before mentioned. This sleeve E' is internally threaded, at
one part, to correspond with a thread e on the thrust bar E, which is thus caused
to move in a longitudinal direction, to operate the toggle lever.
A tripping device J is arranged in connection with the clutch mechanism, to
throw it out of action, when the stroke of the plunger is complete in either
direction.
It will thus be seen the work can be adjusted on the working end c¹ of the
plunger, and lowered to the die by means of the handle k, before any pressure or
blow is exerted by the plunger. The lower portion c (if the tension spring is
detached) will, by its weight alone, or with the attendants' assistance, hold the
work in position until the straightening of the toggle lever causes the portion c*
of the plunger to advance, and strike the top or shoulder of the working end o¹,
thereby forcing the latter, with the work therein, down upon the anvil or die. In
this manner, all danger of displacing the work is avoided.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A punching press provided with an adjustable telescopic plunger substantially
as described and shewn, whereby the work may be held in position on the anvil,
before pressure is applied, and danger of displacement avoided.
2. The means herein shewn and described for operating the toggle lever of the
adjustable plunger, substantially as set forth.
Dated this 19th do of Fabra 1905
NEWTON & SON,
Agents for the Applicant.