Improvements in Cutting and Punching Machine tool
Year: 1888

page_text: Date of Application, 20th Jan., 1888
Complete Specification Left, 27th Aug., 1888
Complete Specification Accepted, 5th Oct., 1888
I, STEPHEN MATTHEWS, of 13 Noble Street, Hendon, Sunderland in the County
of Durham, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to Improvements in Cutting and Punching Machine tool³
and has for its object an arrangement adapted for cutting and punching ships' plates
and the like curvilinearly without necessarily adjusting the plate to the direction
of cut.
Instead of adjusting the plate or other object to the direction of cut of the tool
I adjust the tool to the direction to be cut on the plate and to effect my purpose I
construct or arrange the tool-in-a-revolving boss which may be fitted with a
circumferential groove or its equivalent. The boss may be arranged to fit into a
corresponding inverted socket or step which may be pierced with radial holes to take
set-pins or stud bolts, the ends of the latter by projecting into the circumferential
groove aforesaid sustaining the weight of the aforesaid boss with its tool and guide
piece or leader.
The boss, tool, and leader can be constructed in one forging but I prefer to
make the tool independently adjustable so that different tools may be fitted by
dovetailing or otherwise to the boss for different radii, or when requiring renewal, or
for other purposes.
The socket or step is preferably arranged with flanges for its connection to the
upper frame of the machine and the boss may be provided with radial holes to take
handspikes or their equivalent for revolving the same.
When the above described arrangement is in action the lower end of the leader is
preferably always below the level of the top of the die its leading side in the cycle of
operations automatically pressing against an edge of that portion of the plate which at
the next downstroke or cut or punch of the tool will be operated upon thus ensuring
or checking the position or resultant effect of the next downstroke of the cutting or
aunching tool

page_text: The section of the die is substantially a slightly enlarged section of the cutting or
punching tool with its leader the axis of its radius coinciding substantially with the
axis of the cutting or punching tool with its leader which is also substantially
segmental in section according to the nature of the work to be done. The die may
be arranged either as part of, or an adjustable fixture in a revolving boss grooved
circumferentially and working in a socket or step attached to the lower frame of the
machine substantially in the manner already described in reference to the inverted
boss and socket or step of the punching or cutting tool and in action the movements of
the upper and lower bosses are coincident through the intervention of the aforesaid
leader and the whole may be constructed of steel, iron or other suitable material.
My invention is specially applicable for cutting or punching manholes, side-lights,
or other curvilinear work, the combination of cuts or punches forming substantially
true lines.
Dated this 19th day of January 1888
A. CRA WHALL CHAPMAN,
2, St. Nicholas' Buildings, Newcastle-on-Tyne,
Patent Agent for Applicant.

page_text: Improvements in Cutting and Punching Machine Tools.
I, STEPHEN MATTHEWS, of 13 Noble Street, Hendon, Sunderland, in the county of
Durham, Engineer, 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 improvements in cutting and punching machine tools
and has for its object an improved arrangement or design of the cutting tool or
punch and die of cutting and punching machine tools as compared with those
hitherto constructed for similar purposes.
My improvements consist in a special form and arrangement of tool adapted to
meet the requirements of shipbuilders and engineers in cutting curvilinear work in
iron, steel, or other plates of a like nature as well as in the arrangement of adjustable
die hereinafter more particularly alluded to.
In carrying out my experiments for this purpose, I first of all conceived, designed
and put into practical work the idea of connecting the punching tool with the die by
means of an extension of the tool, in such a manner that by simply revolving the boss
on which the tool was formed I simultaneously and automatically caused identical
revolution to be given to the die. I conceived this idea and put it into practical form
for work towards the end of the year eighteen hundred and eighty seven and since
that time it has been in constant every day use. I found however that the particular
form of tool with the extension thereof for the purposes above described was a matter
of the utmost importance to ensure the practical success of my invention. I have
now ascertained the particular form which meets the requirements of the case and I
have also effected other subsidiary improvements in the details of making the tool and
die adjustable. Hitherto the tool has been constructed as part of a forging answering
several purposes with the result that on the tool becoming worn away the whole forging
had to be condemned, but according to my improvements I construct the tool as a
separate piece which can be readily removed for renewal or for other purposes and
similarly I construct the die so that its working parts can readily be replaced or
renewed..
I will now proceed to particularly describe the details of my invention having
reference to the accompanying drawings in which fig. 1 represents a general side
elevation of my improved arrangement of cutting and punching machine tool; fig. 2
is a plan of the diepiece and adjustable die showing the tail or extension piece of the
cutting tool in section in the die, the dotted lines within the die indicating the position
of the cutting tool relatively to the die. Fig. 3 is a plan, fig. 4 an end elevation and
fig. 5 a side elevation of the adjustable cutting tool or punch as removed from its seat
in the revolving boss, and throughout this description similar letters of reference
designate corresponding parts.
A is the upper sliding or reciprocating portion of an ordinary Machine Punching
Tool to which is attached by bolts B B the inverted socket-piece C. Into the socket C
is-fitted the spindle or boss D which forms the upper portion of the forging on which

page_text: the tail piece or extension E is formed. The spindle D is grooved circumferentially
as shown at F and into this groove the ends of the set pins or stud bolts G G project,
for the purpose of upholding the spindle and its adjuncts in the socket. At or about
the line where the spindle emerges from its socket its diameter is enlarged to form the
boss H, on which and with which the extension piece E is forged and into which the
cutting tool J is fitted by a dovetail joint as shown in fig. 4. In fig. 1 K represents a
plate about to be cut with the cutting tool J at the top of its stroke and the lower
end E¹ of the tail E in position in the die. L is the diepiece which is fitted in a
socket or step M and the circumference of the diepiece is grooved as shown at N for
the purpose of receiving the ends of the setpins or stud bolts O which serve to
maintain the die in its position but at the same time offer no impediment to its
horizontal revolution.
The socket M is attached by bolts or otherwise to the lower frame of the punching
machine. is the die which is seen best in fig. 2 and for shipbuilding purposes where
manholes sidelights and the like have frequently to be cut out the outside line of the
die may conveniently be made about nine or ten inches radius.
It will be seen as shown in fig. 2 that I construct the outside cutting edge of the
cutting or punching tool and the tail or extension piece of one common radius and
this is essential to ensure a smooth surface as opposed to a jagged edge different radii
of tool and extension piece and die being kept in stock for adaptation to the varying
radii occurring in practical work. Fig. 6 represents diagrammatically a line as cut
by a cutting tool and leader constructed otherwise than according to my invention and
fig. 7 represents the result desired and obtained by my invention. The tail or extension
piece should be a machine fit in the die so as to prevent any lateral vibration of the
cutting tool but the inside radius of the die should be such as to leave a little play
for the cutting tool as shown in fig. 2.
Figs. 3, 4, and 5 show the cutting tool and the mode adopted for fitting it into the
boss H. The latter is slotted out to take the dovetailed cutting tool J which is
provided with a lug P through which a small screw stud p passes and thus secures the
tool in its position contiguous to and in proper allignment with its independent tai!
or extension piece E.
The boss His provided with radial holes h for the handspikes or levers which are
used in giving revolution to the tool and die.
Further in order to prevent the periodical renewal of the die through wear, I make
the die separate from the diepiece as shown clearly in figs. 1 and 2, so that the
portion R, R, R, R, can by the removal of the holding down pins S S be readily
removed and replaced by a new piece containing a new die.
The operation of my invention is as follows:
First, the lines on the plate to be cut are marked off and a hole is started on this
line with an ordinary punching tool. The operators then place the plate over the die
in the position shown in fig. 1 but in order to do this the reciprocating jaw of the
punching machine must first be jacked up in order to allow the plate to pass under
the extension piece E. The latter is then lowered into the starting hole and recipro-
catory motion having been given to the tool the operator can by means of the handspikes
already referred to cause the cutting tool to follow the lines marked on the plate with
precision.
Having now particularly described and ascertained the nature of this my said inven-
tion and in what manner the same is to be performed I wish it to be distinctly
understood that I do not claim the exclusive use of the means employed and herein-
before set forth by which through the intervention of the extension of the cutting
tool the revolutionary movements of the punch and die are rendered identical
because by reason of at least my own prior user as set forth in the beginning of this
specification such subject matter is wanting in novelty and therefore what I do
claim is :
(1). The use in combination with a cutting or punching machine tool arranged in
such a manner that by the revolution of the boss or portion on which the cutting tool

page_text: is fitted or formed identical motion is given to the die through or by means of an
extension of the cutting tool into the die as herein before set forth of the principle
and method of making the cutting part or tool J adjustable substantially in the
manner and for the purposes hereinbefore described and illustrated in the annexed
drawings.
(2). The use in combination with a cutting or punching machine tool arranged in
such a manner that by the revolution of the boss or portion on which the cutting
tool is fitted or formed identical motion is given to the die through or by means
of an extension of the cutting tool into the die as hereinbefore set forth of the specific
form or section of cutting tool J and extension piece E E with an outside or external
radius common to both substantially as and for the purposes hereinbefore described
and illustrated more especially in figure 2.
(3). The use in combination with a cutting or punching machine tool arranged in
such a manner that by the revolution of the boss or portion on which the cutting
tool is fitted or formed identical motion is given to the die through or by means
of an extension of the cutting tool into the die as hereinbefore set forth of a die
arranged within a die piece so as to be readily capable of replacement or renewal
substantially as hereinbefore described and illustrated.
A. CRAWHALL CHAPMAN,
2, St. Nicholas' Buildings, Newcastle-on-Tyne,
Patent Agent for Applicant.