IMPROVEMENTS IN STOCKS AND DIES
Year: 1875

page_text: LETTERS PATENT to Henry Gibson and Mark Towell, both of Sheffield,
in the County of York, for the Invention of "IMPROVEMENTS IN STOCKS
AND DIES."
Scaled the 7th September 1875, and dated the 11th March 1875.
PROVISIONAL SPECIFICATION left by the said Henry Gibson and
Mark Towell at the Office of the Commissioners of Patents, with
their Petition, on the 11th March 1875.
We, HENRY GIBSON and MARK TOWELL, both of Sheffield, in the
County of York, do hereby declare the nature of our said Invention for
"IMPROVEMENTS IN STOCKS AND DIES," to be as follows:-
Our Invention relates to certain improvements in the construction and
manufacture of screw stocks and dies, whereby the cost of production is
reduced, and a more compact arrangement of the dies is obtained.
In carrying out our Invention we make the stock or frame for carrying.
the dies of either malleable, cast, or wrought iron, or other suitable.
material, and with a centre part or body, and two handles in one.
piece,

page_text: The body has a slot or hole, the section preferred being oblong, passing
completely through (edgewise) from one side to the other, and at an
angle of, say, about forty-five degrees to the line of the handles, through
the centre of the body, and through the slot a hole is made to allow
the bolt (or object to be screwed) to be placed between the dies.
The dies are made of steel, and are constructed to fit into the slot
or hole in the body, and to move freely therein backwards and forwards.
The fast die is secured during use by means of a cotter or pin, part of
which passes through the body of the stock and part through the edge
of the die, for example, if a round pin is used, a hole is so drilled that
half its diameter is in the body of the stock and half in the edge of the
die; a pin filling this hole will effectually prevent the die from being
moved.
The sliding or moveable die is forced forward when in use by means of
a screw conveniently placed and working through a corresponding
threaded hole in the body of the stock, the end of the screw pressing
against a flat formed by cutting away a portion of one side of the die.
The dies are constructed to cut at both ends, and either for the same
or different diameters of screws. We thus obtain with two pairs of dics
what it usually takes four pairs to accomplish.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Gibson and Mark Towell in the Great Scal
Patent Office on the 10th September 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, HENRY
GIBSON and MARK TOWELL, both of Sheffield, in the County of York,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of March, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Henry Gibson and Mark Towell,
Her special license that we, the said Henry Gibson and Mark Towell,

page_text: our executors, administrators, and assigns, or such others, as wc, the
said Henry Gibson and Mark Towell, our executors, administrators; or;
assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed;
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN STOCKS AND DIES,"
upon the condition (amongst others) that we, the said Henry Gibson and
and Mark Towell, our executors or administrators, by an instrument in
writing under our hands and scals, or under the hand and scal of onc
of us, should particularly describe and ascertain the nature of the said.
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
31.4
:
NOW KNOW YE, that we, the said Henry Gibson and Mark Towell,
do hereby declare the nature of our said Invention, and in what manner,
the same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the accom
panying Drawings, and to the letters and figures marked thereon, that
is to say:
Our said Invention relates to certain improvements in the construction
and manufacture of screw stocks and dics, whereby the cost of pro-.
duction is reduced, and a more compact arrangement of the dies is
obtained.
In carrying out our Invention we make the stock or frame for carrying
the dies of cither malleable, cast, or wrought iron, or other suitable.
material, and with a central portion or body, and two handles in ono
piece.
The body has a slot or hole, the section preferred being oblong, passing
completely through (edgewise) from one side to the other, and by
preference, at an angle of, say, about 45 degrees to the line of tho
handles through the centre of the body, or at right angles to the handles
if preferred, and through the slot a hole is made to allow the bolt (or
other article to be screwed) to be placed between the dies.
The dies are made of steel, and are constructed to fit into the slot or
hole in the body, and to move freely therein backwards and forwards.

page_text: The fast dio is secured during use by means of a cotter or pin, or
screw, part of which passes through the body of the stock and part
through the edge of the dic; for example, if a round pin is used, a hole
is so drilled that half its diameter is in the body of the stock and half
in the edge of the die. A pin filling this hole will effectually prevent 5
tho die from being moved.
The sliding or moveable die is forced forward when in use by means of
a screw conveniently placed, and working through a corresponding
threaded hole in the body of the stock, the end of the screw pressing
against a flat formed by cutting away a portion of one side of the die.
The dies are constructed to cut at both ends, and either for the
same or different diameters of screws; we thus obtain with two pairs of
dies what it usually takes four pairs to accomplish.
And in order that our said Invention may bo fully understood, wo
shall now proceed more particularly to describe the same, and for that 1
purpose shall refer to the several Figures on the annexed Sheet of
Drawings, the same letters of reference indicating corresponding parts in
all the Figures.
Figure 1 of the accompanying Drawings represents an elevation of a
screw stock and dies constructed in accordance with our said Invention. 2
Figure 2 is a corresponding edge view of a portion of the under side
of the stock, the dies being assumed as removed.
Figures 3 and 4 are detail views of the dies detached.
Figuro 5 represents a modification to be hercin-after referred to.
A is the stock or frame consisting of a central portion or body a and
two handles b, b, all made in one piece. In the body a there are formed
a slot or hole B extending edgewise from one side to the other, and by
preference at an angle to the handies b, b, for the reception of the fixed
or fast die C and the loose or moveable die C', and also a transverse
central hole D for the passage of the bolt or other article to be screwed
between the dies C, C¹.
The fast die C is secured during use by means of a cotter or pin c
passing through a hole formed through the body a in any suitable
position, and fitting a recess formed in the side of the die at a, as shown
clearly in Figure 3.

page_text: The moveablo die C¹ is forced forward as the operation of screwing
proceeds by means of a screw E engaging in a tapped hole formed in
the body a of the stock, the end c of which screw presses against an
inclined flat surface F (Figures 1 and 4), formed by recessing the die O'
at its edge. The angle of the surface F is so arranged as to ensure the
ende of the screw E pressing firmly against it in the different positions
which it assumes when the die is open or closed on the bolt or other
article being screwed.
The dies C, C', are formed with cutting edges at both ends f, f, and
ff, respectively for screws of either the same or different diameters,
and they may be readily removed by sliding them along the slot or
hole B after unscrewing the screw E, and withdrawing the pin c so as to
enable their ends to be reversed, whereby two pairs of dies may be
utilized for performing the work for which four pair are required
according to the ordinary system. It is obvious however that one end
only of cach die may be provided with cutting edges if preferred.
It is preferred to arrange the dies at an angle of about forty-five
degrees to the line of the handles, as shown in Figure 1, but they may
be placed at right angles to the handles, as shown in Figure 5, or at any
other suitable angle thereto.
If the stock is to be made of wrought iron it is forged, and the hole B
for the dies C, C', is punched and drifted through while the forging is in
a heated condition, to be subsequently finished with cutting drifts by
the fitter. When however it is composed of cast malleable iron, the
stock is cast with the hole B for the dies and the hole D in the centre
which are finished by drifts.
It is obvious that by the use of our Invention attached plates or caps
are entirely dispensed with.
Having now described and particularly ascertained the nature of our
said Invention, and the manner in which the same is or may be used
or carried into effect, we would observe in conclusion that what we
consider to be novel and original, and thereforo claim as the Invention
secured to us by the herein-before in part recited Letters Patent is,-
First. The peculiar combination and arrangement of screw stock,
having a central portion or body formed with a longitudinal hole
extending therethrough edgewise from side to side, and fitted with dies

page_text: so arranged as to be capable of sliding through such hole, and of being
respectively adjusted and fixed, all substantially as herein-before described
and illustrated by the accompanying Drawings.
Second. The combination with a screw stock of dics of an oblong
shape having cutting edges at both ends, the adjustable die being set up
to the work by means of a screw pressing or acting against the side of
such die, all substantially as and for the purpose herein-before described,
and as illustrated by the accompanying Drawings.
In witness whereof, I, the said Henry Gibson, on behalf of myself
and the said Mark Towell, have to this our Specification set my
hand and seal, the Eighth day of September, One thousand eight
hundred and seventy-five.