Improvements in or additions to Screw Stocks and their Dies.
Year: 1897

page_text: Date of Application, 25th Sept., 1897
Complete Specification Left, 16th May, 1898-Accepted, 2nd July,
1898
Improvements in or additions to Screw Stocks and their Dies.
I, ALEXANDER DUKE, of Sligo House, Pittville, Cheltenham, in the County of
Gloucester, Doctor of Medicine, do hereby declare the nature of this invention to
be as follows:-
My invention consists in combining with or adding to screw stocks and their
dies, a circular cutter or cutting disc and a holding die as herein after described
whereby the same stock and dies may be used either for cutting screws or for
cutting or dividing tubes, the screw stock and dies sent into commerce with my
improvements or additions constituting a combined screw stock and dies and tube
cutter.
In carrying my invention into effect I use the ordinary inner V ribbed die stock
frame the screwing dies sliding on the ribs of the stock frame as usual and for the
purpose of permitting tubes to be cut into lengths by the use of the screw stock and
dies, I mount in a die having V shaped ends for engaging with the V ribs of the
stock frame, a circular cutter or cutting disc capable of rotation on an axis carried
by the said die and for the purpose of holding the tube in its place during the
cutting operation I make in the plain side of one of the screwing dies, preferbly
the topmost and smallest screwing die, a V depression or angular notch so as to
convert that die into a holding die, the tube during the cutting operation seating
itself in the said V depression or notch.
A screw stock and its dies with the additions or improvements herein before
described constitute a combined tool and may be used either for screwing
articles or for cutting tubes.
In using the combined tool described as a tube cutter, the die carrying the
circular rotating cutter is placed in the stock frame, that face of the die of the said
cutter die carrying the rotating circular cutter being presented to the notched or
holding face of the topmost screwing die.
The tube to be cut being placed between the holding die and cutter die the
latter is advanced by the end binding screw of the stock until the cutter penetrates
the tube. The tube being fixed in a vice or otherwise the stock is ratated upon the
tube and the cutter die gradually advanced against the tube by the end screw.
The tube is thereby cut or divided.

page_text: Improvements in or additions to Screw Stocks and their Dies.
ચL K
I, ALEXANDER DUKE, of Sligo House, Pittville, Cheltenham, in the County of
Gloucester, Doctor of Medicine, do hereby declare the nature of my invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
My invention consists in combining with or adding to screw stocks and their
dies a circular cutter or cutting disc and a holding die as hereinafter described
whereby the same stock and dies may be used either for cutting screws or for
cutting or dividing tubes, the screw stock and dies sent into commerce with my
improvements or additions constituting a combined screw stock and dies and tube
cutter.
In carrying my invention into effect I use the ordinary inner ✓ ribbed die stock
frame the screwing dies sliding on the ribs of the stock frame as usual and for the
purpose of permitting tubes to be cut into lengths by the use of the screw stock and
dies, I mount in a die having V shaped ends for engaging with the V ribs of the
stock frame, a circular cutter or cutting disc capable of rotation on an axis carried
by the said die and for the purpose of holding the tube in its place during, the
cutting operation I make in the plain side of one of the screwing dies, a V.depres-
sion or angular notch so as to convert that die into a 'holding die, the tube during
the cutting operation scating itself in the said V depression or notch.
A screw stock and its dies with the additions or improvements herein before
described constitute a combined tool and may be used either for screwing
tubes and other articles or for cutting tubes.
In using the combined tool described as a tube cutter, the die carrying the
circular rotating cutter is placed in the stock frame, that face of the die of the said
cutter die carrying the rotating circular cutter being presented to the notched or
holding face of the lowest screwing die..
The tube to be cut being placed between the holding die and cutter die the
latter is advanced by the end binding screw of the stock until the cutter penetrates
the tube. The tube being fixed in a vice or otherwise the stock is rotated upon the
tube and the cutter die gradually advanced against the tube by the end screw.
The tube is thereby cut or divided.
↓
Figure 1 of the accompanying drawing represents in plan and Figure 2 in side
elevation a screw stock and its dies with the improvements or additions constituting
my invention so as to form a combined tool which may be used either for screwing
articles. or for cutting tubes; Figure 3 is a cross section taken on the dotted
line, Figure 1, through the stock frame and cutter carrying die and its cutter;
Figure 4 represents in longitudinal section and Figure 5 in end elevation the
cutter carrying die detached.
The same letters of reference indicate the same parts in the several figures of
the drawing.
4
a is the ribbed stock frame and b, b, b and 62 are the screwing dies sliding on
the ribs of the said frame; c is the cutter carrying die having notched or V shaped
ends similar to the screwing dies, for engaging with the Vribs of the: stock; frame
(see the cross section Figure 3); d is the circular cutter or cutting disc fitted in
the recess e and so mounted upon the axis f in the said carrying die c that a portion 4
of its periphery projects from one side of the said die c. The said circular cutter
C
or disc d is capable of rotation on the said axis f. In the plain face of one of the
screwing dies of the set, is a V depression or angular notch to convert that die
into a holding die for holding the tube in its place during the cutting operation, a

page_text: portion of the tube seating itself in the said notch or depression g as seen in
Figure 1; h is the ordinary end binding screw of the stock for holding the screw-
ing dies and cutting die in their proper places in the stock during the screwing
or cutting operation.
The combined tool represented is sent into commerce with the set of screwing and
holding dies b, b, b, 62 and with the cutter carrying die e fitted in the stock frame..
The combined tool is used for screwing articles in the same way as an ordinary
screw stock and its dies are used. In using the combined tool for cutting tubes
the dies are arranged in the stock frame in the manner represented in Figures 1
and 2, that is to say, the cutter carrying die c is arranged in the stock frame so that
that face carrying the projecting part of the cutter d is presented to the notched
or holding face g of the screwing die 62 and the tube to be cut is placed between
the holding die 62 and cutter die c as represented in the drawing and the said
cutter die c is advanced by the end binding screw h until the cutter & pentrates the
tube . The tube is then fixed in a vice or holder and the stock is rotated upon
the tube and the cutter die c gradually advanced by the screw h against the tube
for cutting or dividing the said tube as will be understood by an examination of
Figure 1.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that I claim as my
invention:-
The improvements in or additions to screw stocks and their dies hereinbefore
described and illustrated in the accompanying drawing whereby the same screw
stock and dies may be used either for cutting screws or for cutting or dividing
tubes the said improvements or additions consisting in the use in the stock frame of
a sliding die carrying a circular cutter or cutting disc mounted and rotating on an
axis in the said die and converting one of the screwing dies into a tube holding
die by forming in the plain side, or that side presented to the cutter carrying die,
a V depression or angular notch in which the tube is seated during the cutting
operation substantially as described and illustrated.
Dated the Twelfth day of May 1898.