IMPROVEMENTS IN SCREW STOCKS AND DIES
Year: 1859

page_text: LETTERS PATENT to Thomas Williams, of Aberdaron, in the County of
Caernarvon, Engineer, and John Hobson Fuller, of 70, Hatton Garden,
in the County of Middlesex, Tool Manufacturer, for the Invention of
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Sealed the 29th September 1859, and dated the 2nd April 1859.
PROVISIONAL SPECIFICATION left by the said Thomas Williams and
John Hobson Fuller at the Office of the Commissioners of Patents, with
their Petition, on the 2nd April 1859.
We, THOMAS WILLIAMS, of Aberdaron, in the County of Caernarvon,
Engineer, and JOHN HOBSON FULLER, of 70, Hatton Garden, in the County
of Middlesex, Tool Manufacturer, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN SCREW STOCKS AND DIES," to be as
follows:-
These improvements consist in the adaption of two square dies with a
cutting surface on each edge thereof, each of which may be of a different size
and pitch of thread, placed in a suitable stock; the said dies, or one of them,
being propelled either by any of the methods ordinarily in use, or by the cross
bar arrangement described in the Specification of our Patent dated 8th May,
1855, "& numbered 1035," also in the adoption of two or more dies, with
flat grooves on the edges, in substitution for the ordinary methods of keeping
the dies in position. The dies being propelled by means of a wedge at the
back of each, pressed down by a plate on the top of the stock worked by a
screw or screws.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Williams and John Hobson Fuller in the Great Seal
Patent Office on the 1st October 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
WILLIAMS, of Aberdaron, in the County of Caernarvon, Engineer, and JOHN
HOBSON FULLER, of 70, Hatton Garden, in the County of Middlesex, Tool
Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of April, in the year of our Lord One
thousand eight hundred and fifty-nine, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Thomas Williams and John Hobson Fuller, Her special licence that we,
the said Thomas Williams and John Hobson Fuller, our executors, adminis-
trators, and assigns, or such others as we, the said Thomas Williams and
John Hobson Fuller, our executors, administrators, and 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
SCREW STOCKS AND DIES, &c.," upon the condition (amongst others) that we, the
said Thomas Williams and John Hobson Fuller, our executors or adminis-
trators, by an instrument in writing under our, or their, or one of our or their
hands and seals, 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.
NOW KNOW YE, that we, the said Thomas Williams and John Hobson
Fuller, do hereby déclare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer
tained in and by the following statement:-
The nature of the said Invention; which has already been intimated
generally by the Provisional Specification filed on application for the said
Letters Patent, is hereby in compliance with the said condition in the afore-
said Letters Patent contained, particularly described, and ascertained, as also
in what manner the same is to be performed; reference being had to the
accompanying Drawings' by the words, figures, and letters marked thereon, and
herein-after alluded to.
Fig. 1 represents a plan view of the screw stock with dies fitted therein.

page_text: The dies A, A, (two in number) are square with a cutting surface on each
edge thereof, a, b, c, d. These fit into a box or slot in the stock B, B, in the
same manner as in ordinary "plate" stocks, being kept in position by a lid or
cover (represented in Fig. 2,) which slides into the grooves e, e, e, e, on the
top of the said box or slot. The Drawing shews the dies arranged so that
the cutting surfaces a, a, are in correspondence with each other, but when this
is not the size of cutting surface required, it will simply be necessary to slide
off the aforesaid lid and take out the dies and change the cutting surfaces, so
that b, b, or c, c, or d, d, may be "set" to act in conjunction as desired: C is
a piece of steel (or other suitable metal) interposed between the propelling
screw D and the die nearest to it. This plate (C) is guided and secured by
having a projection at each end which is intended to slide in a groove cut in
the side of the said box containing the dies, which arrangement is at Fig. 3
shewn in detail by cross section taken at f, g, in Fig. 1. The propelling
screw D and cross bar E are the same as those described in the Specifica-
tion of our former Patent, dated the Eighth day of May, One thousand eight
hundred and fifty-five (and illustrated by the Drawings annexed thereto by
Fig. 2. 6º.)
Fig. 4, longitudinal section, exhibiting an improved method of propelling
the above-described dies in the aforesaid stock, applicable also to. stocks and
dies not made according to our Invention. F is a plate with one end (*)
wedge-shaped, having a screw G passing loosely through an orifice in the top
of said plate (F); the thread of this screw works in a corresponding internal
screw cut in the body of the stock át i, pressing down the wedge (*) at the
back of the die k; the other end (not wedge-shaped) of the said plate (F)
passes through a slot in the body of the stock to keep it in its place, at the
same time allowing it sufficient play laterally to coincide with the advancing
or receding of the wedge.
Fig. 5 is a plan view of a stock and dies, and Fig. 6, a longitudinal section
thereof. In this case, one die (H) is propelled by a wedge (see K in the
sectional view, Fig. 6,) which wedge has a screw attached to or forming part
of it, and upon this screw works a nut or collar L threaded to correspond with
it; the nut being screwed down, the wedge is drawn up into it, and thus
propels the die (H.) The piece marked M is merely interposed between the
wedge and the die for convenience, and might be dispensed with if preferred,
the back of the die being shaped accordingly. The die H is kept in position
by flat grooves on the edges, as shewn by Fig. 7 in section taken at l, m, in
Fig. 5; the other die J is secured in position by two pieces marked o, o, as
exhibited by Fig. 8 in section taken at p, q, in Fig. 5. These dies being

page_text: turned end for end present cutting surfaces other than those shewn ready for
work in the Drawing.
Fig. 9 is a view in perspective of a stock and dies. In this case we use
three dies N, N, N, situate in the stock in the direction of radii to the axis of
the rod or bar, on which a screw is to be cut by the said dies. We cause all
three of the dies to advance simultaneously by means of a wedge at the back
of each, which wedges are propelled by a plate o, to which they are attached
by the head of the said wedges passing through a slot in the said plate, and
secured thereto by a pin, as shewn at r, s, t. This plate has a hinge * at one
end, and is pressed down at the other by a screw P working into the body of
the stock. These dies can be removed at the bottom, and others substituted
by removing the plate v, or at the top by means of another plate underneath
the plate o, the plate being in that case a fixture. The arrangements of
this stock are shewn in section at Fig. 10.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, we hereby declare
that we claim,
(First), the adoption of two square dies, with a cutting surface on each edge
thereof.
(Secondly), the adoption of a wedge or wedges at the back of the die or dies
pressed down, drawn up, or propelled by the arrangements described with
regard to Figs. 4, 5, 6, 9, and 10 of the annexed Drawings, and there exhibited,
or any immaterial variations of the same.
In witness whereof, I, the said John Hobson Fuller, on behalf of myself
and the said Thomas Williams, have hereunto set my hand and seal,
this 1st day of October, in the year of our Lord One thousand eight
hundred and fifty-nine.
Signed and sealed in my presence,
F. W. CAMPIN,
Patent Agent,
156, Strand.
J. H. FULLER. (L.S.)