Improvements in Tools for the Manufacture of Washers, Shields, Caps, and the like.
Year: 1892

page_text: Date of Application, 15th Mar., 1892
Complete Specification Left, 12th Dec., 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Tools for the Manufacture of Washers, Shields,
Caps, and the like.
I, JAMES GUEST CROWTHER of Steade Road Sheffield in the County of York,
Manufacturer, do hereby declare the nature of my invention to be as follows:-
This invention relates to the construction of tools for the rapid production of
metallic washers, shields, caps and like articles having a centre hole through them,
and by means of which such articles are economically and accurately produced.
I dispense with the two separate processes of cutting out and piercing by means
of two sets of tools, which is usually employed, and combine the two processes or
operations in one set of tools.
The tools may be held in a hand or power fly or like machine having a
reciprocating motion in a similar manner to the ordinary bed and punch.
The die or that part of the tool which is fixed upon the bed of the machine, is
(when made for cutting out washers) bored through its face to the required size of
the washer, and the punch which is carried by the slide of the machine is made to
correspond therewith in the usual manner.
To enable the same pair of tools to cut out the centre hole, technically called
piercing, I fix a piercing punch in the centre of the die before mentioned, and form
the face of the chief punch into a die by boring a suitable hole vertically in its
face, connected with one or more passages for the escape of the punchings.
The piercing punch, and the centre hole in the face of the punch are made to
correspond and of the required diameter for the hole in the washer.
The piercing punch is fixed vertically in the centre of a strong disc which forms
its base, and which is fitted into a recess in the underside of the die, so as to support
the said punch rigidly and in a true central position. The said punch is further
supported by a vertically moving cylindrical block which fits into the enlarged
recess formed under the punching hole of the die, and surrounds the piercing punch
from its base to within a short distance from its nose.
The base of the block rests upon the disc or base of the piercing-punch, and two
extensions or legs pass through corresponding holes in the disc and for some distance
beyond downwards.
The top face of the block fits into the punching hole of the die, and acts as a
shaper if required, thus if dished washers are required the face of the block may
be made convex, and the face of the chief punch ccncave or reverse, and when the
washer is cut and pierced further movement of the machine will press the washer
between the convex and concave faces before mentioned, and give it the
required shape.
The downwardly projecting legs of the block I connect by any suitable
intermediate mechanism to a moving part of the machine, or otherwise, by which
it is caused to move upwards at the right moment and throw out the washer from
the die cut to shape and pierced.
Dated the 12th day of March 1892.

page_text: COMPLETE SPECIFICATION.
Improvements in Tools for the Manufacture of Washers, Shields,
Caps, and the like.
I, JAMES GUEST CROWTHER of Steade Road, Sheffield in the County of York,
Manufacturer, 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 :—
This invention relates to the construction of tools for the rapid production of
metallic washers, shields, caps and other like articles having a centre-hole through
them, by means of which tools, such articles can be more economically and
accurately produced.
In carrying out my invention I dispense with the two separate processes of
cutting out and then piercing the article by means of two sets of tools, which are
usually employed, and I combine the two processes or operations in one set
of tools.
The annexed sheet of drawings, illustrates the invention, in which
Fig. 1, is an elevation of the chief punch and the bed which is shown in section,
the auxiliary tools are also shown.
Fig. 2, elevation of the auxiliary tools, and plan of the punch.
Fig. 3, washer punched out by the said tools.
The tools may be held in hand or power fly or like machine having a reciprocating
motion in a similar manner to the ordinary bed and punch.
The die A, or that part of the tool which is fixed upon the bed of the machine,
is (when made for cutting out washers) bored through its face to the required size
of the washer W, and the punch B, which is carried by the slide of the machine is
made to correspond therewith in the usual manner.
To enable the same pair of tools to cut out the centre hole C, of the washer W,
technically called piercing, I fix a piercing punch D, in the centre of the die before
mentioned, and form the face of the chief punch into a die by boring a suitable
hole E, vertically in its face, connected with one or more passages F, for the escape
of the punchings.
The piercing punch D, and the centre hole E, in the face of the punch are made
to correspond, and of the required diameter for the hole in the washer W.
The piercing punch D, is fixed vertically in the centre of a strong disc G, which
forms its base, and which is fitted into a recess H, in the underside of the die A, 80
as to support the said punch rigidly and in a true central position. The said punch
is further supported by a vertically moving cylindrical block J, Fig. 2, which fits
into the enlarged recess K, formed under the punching hole of the die A, and
surrounds the piercing punch from its base to within a short distance from its nose.
The base I, of the block J, rests upon the disc or base G, of the piercing
punch D, and two extensions or legs M, pass through corresponding holes N, in the
disc and for some distance beyond downwards.
The top face O, of the block J, fits into the punching hole P, of the die A, and
acts as a flattener or shaper if required, thus if concave or convex washers are
required the face of the block may be made convex, and the face of the chief
punch concave (or reversed) and when the washer is cut and pierced a further
movement of the machine will press the washer between the convex and concave
faces before mentioned, and give it the required shape.
The downwardly projecting legs M, of the block I connect by any suitable
intermediate mechanism to a moving part of the machine, or otherwise, by which
the block is caused to move upwards at the right moment and throw out the washer
from the die, cut to shape and pierced or pressed.

page_text: Having now particularly described and ascertained, the nature of my invention
and the manner in which it may be carried into practice, I declare that what I
claim is :-
1-The improved tools for cutting out and punching washers, shields and the
like, constructed in the manner hereinbefore described and as shown in the drawings
annexed.
2-In a bed and punch the combination with the bed A, of an internally arranged
vertical punch D, supported by a block J, capable of a vertical movement; and the
punch B, constructed with a hole E, to receive the vertical punch D, and with
means for the escape of the punchings, substantially as hereinbefore described
and shown.
3-In a bed and punch, the combination with the bed A, of an internally arranged
block J, having its upper face shaped to correspond with the face of the punch B,
for the purpose specified and substantially as herein before described.
Dated the 7th day of December 1892.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.