Improved Stocks and Dies for Screw-cutting.
Year: 1894

page_text: Date of Application, 6th Sept., 1894
Complete Specification Left, 4th June, 1895-Accepted 27th July, 1895
PROVISIONAL SPECIFICATION.
Improved Stocks and Dies for Screw-cutting.
We, WILLIAM WARD, of High Street, Portishead, Somerset, Marine Engineer,
and THOMAS HENRY COLES, of Brixton Villa, Carnarvon Road, Redland, Bristol,
Managing Ironmonger, do hereby declare the nature of this invention to be as
follows:-
This invention relates to stocks and dies for screw-cutting.
In stocks made in accordance with this invention that end of the slot for the dies
which is furthest from the adjusting screw is tapered to present a knife-edge
extending inwardly. The die appertaining to the said end is recessed to correspond
with the said tapered end of the slot, so that when the said die is inserted and
pushed home it is supported at the back on the tapered part of the slot end. At
one side the said die is supported on the usual V-shaped side of the slot. The
opposite side of the slot is also V-shaped, as usual, but, under this invention, the
V-shape ceases in the said opposite side at a point sufficiently far from the tapered
end of the slot to permit the die appertaining to that end to clear the knife-edge of
the slot end when the said die is being inserted or withdrawn. From the said point
to the knife-edge at the end of the slot the side of the slot is checked out and the
checked out part is so shaped as to permit the dies to be freely inserted or with-
drawn. The die appertaining to that end of the slot at which the adjusting screw
is situated is, as usual, supported at both sides on the V-shaped sides of the slot.
In stocks and dies shaped and arranged in accordance with this invention, the
adjusting screw and it's range of travel in withdrawing and clamping the dies are
shortened and time is accordingly economised,
Dated this 4th day of September 1894.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.
Improved blocks and Dies for pr
We, WILLIAM WARD, of High Street, Portishead, Somerset, Marine Engineer,
and THOMAS HENRY COLES, of Brixton Villa, Carnarvon Road, Redland, Bristol,
Managing Ironmonger, 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 stocks and dies for screw-cutting.
In stocks made in accordance with this invention, that end of the slot for the dies
which is furthest from the adjusting screw is tapered to present a knife-edge
extending inwardly. The die appertaining to the said end is recessed to correspond
with the said tapered end of the slot, so that when the said die is inserted and
pushed home it is supported at the back on the tapered part of the slot end. At
one side the said die is supported on the usual V-shaped side of the slot.
The opposite side of the slot is also V-shaped, as usual, but, under this invention,
the V-shape ceases in the said opposite side at a point sufficiently far from the

page_text: tapered end of the slot to permit the die appertaining to that end to clear the
knife-edge of the slot-end when the said die is being inserted or withdrawn. From
the said point to the knife-edge at the end of the slot the side of the slot is checked
out, and the checked out part is so shaped as to permit the dies to be freely inserted
or withdrawn. The die appertaining to that end of the slot at which the adjusting
screw is situated is, as usual, supported at both sides on the V-shaped sides of the
slot.
Referring to the accompanying sheet of illustrative drawings, Fig. 1 thereon
represents part of a pair of stocks shaped and fitted with dies in accordance with
this invention.
Fig. 2 is a section on the line e, x, Fig. 1. Fig. 3 is a part section along the
line y, y, Fig. 1.
C
The end a of the slot for the dies is V-shaped, the apex of the V being inwards.
The die e appertaining to this end of the slot bis recessed to correspond with the
said V-shaped end of the slot, so that when the die is inserted and pushed home,
as seen at Figs. 1 and 2 of the drawings, it is supported at the back on the tapered
end a of the slot . At one side the die c is supported, as usual, on a V-shaped
ledge d.
The opposite side of the slot is also made, as usual, with a V-shaped ledge
but, under this invention, the V-shaped ledge e ceases at the point el which is
sufficiently far from the tapered end a of the slot to permit the die c to clear
the knife-edge of the slot when the said die c is being inserted or withdrawn.
The widened part of the slot between the point e¹ and the knife-edge a is inclined
from the upper or front face of the body of the stocks inwards, as seen at Fig. 3,
and permits the dies to be freely inserted and withdrawn.
The die c', acted upon directly by the adjusting serew, is, as usual, supported at
the sides by the V-shaped ledges d and e.
In stocks and dies shaped and arranged in accordance with this invention, the
adjusting screw and its range of travel in withdrawing and clamping the dies arc
shortened, and time is accordingly economised.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
In stocks and dies, a V-shaped ledge such as a situated at that end of the die-
slot which is opposite the adjusting screw (the die for that end being recessed at
the outer end to correspond); one of the usual V-shaped side ledges of the die-slot
being extended only from the adjusting screw end to a suitable point which allows
room for clearance in inserting and withdrawing the dies, and between which point
and the V-shaped end of the die-slot the slot is widened and the side of the widened
part inclined from the top or front inwards, substantially as hereinbefore described
with reference to the accompanying sheet of illustrative drawings.
Dated this 31st day of May 1895.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.