AN IMPROVED SCREW STOCK
Year: 1866

page_text: LETTERS PATENT to Richard Bagley, of Birmingham, in the County of
Warwick, Machinist, for the Invention of "AN IMPROVED SCREW STOCK."
Sealed the 31st January 1867, and dated the 14th August 1866.
PROVISIONAL SPECIFICATION left by the said Richard Bagley at the,
Office of the Commissioners of Patents, with his Petition, on the 14th
August 1866.
I, RICHARD BAGLEY, of Birmingham, in the County of Warwick, Machinist,
do hereby declare the nature of the said Invention for "AN IMPROVED SCREW
STOCK," to be as follows:-
This Invention relates to three-die screw stocks, in the construction of
which it is the custom to use plates upon the surfaces of the stock body for
the purpose of keeping the dies in a desired position; the said dies are
partially covered with the plates, so that when the apparatus is used for
screwing bolts and other things it is not possible to continue the worm
thereon from point to shoulder, because the dies are severally below the
surface of the plates; this is objectionable, and which I remedy as follows:-I

page_text: adopt an ordinary stock frame in the body of which there is an opening or a
series of the same for the reception of the screwed dies; in each of the said
dies there is a flange at one end, and contiguous to the other end there is a
slot for the purpose of fixing the dies in the body of the stock; in consequence
of this arrangement the ends of the dies are flush, that is to say, they project
from the surface of the stock body. Through these means I am enabled to
elongate the screw upon those articles having a head, shoulder, rim, or
washer for which three-die screw stocks are designed, and also supersede the
employment of plates in connection therewith.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Bagley in the Great Seal Patent Office on the 9th
February 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
BAGLEY, of Birmingham, in the County of Warwick, Machinist, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of August, in the year of our Lord-
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Richard Bagley, Her special licence that I, the said Richard Bagley, my
executors, administrators, and assigns, or such others as I, the said Richard
Bagley, my 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 "AN, IMPROVED SCREW
STOCK," upon the condition (amongst others) that I, the said Richard Bagley,
Бтоск,"
my executors or administrators, by an instrument in writing under my, or
their, or one of their bands and seals, should particularly describe and ascer
tain 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.
t
NOW KNOW YE, that I, the said Richard Bagley,, do hereby declare the
nature of the said. Invention, and in what manner the same is to be per-

page_text: formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention relates to three-die screw stocks, in the construction of
which it is the custom to put plates upon the surfaces of the stock body
for the purpose of keeping the dies' in' the desired position.
The said dies are partially covered by the said plates, so that when the screw
stock is used for screwing bolts and other similar articles it is not possible to
continue the worm thereon from point to shoulder, because the dies are severally
below the surface of the plates. This is objectionable, and I remedy it as
follows: I use an ordinary stock frame, in the body of which there is an
öpening or a series of openings for the reception of the screwing dies. In
each of the said dies there is a flange at one end, and near the other end there
is a slot for the purpose of fixing the dies in the body of the stock. By this
arrangement the ends of the dies project from the surfaces of the stock body
and are not covered by the holding plates as is usual. By these means I am
enabled to prolong the screw to the shoulder on such articles as have shoulders,
heads, rims, or washers, and to supersede the einployment of the plates
ordinarily used with screw stocks.
Having explained the nature of my Invention, I will proceed to describe
with reference to the accompanying Drawings, the manner in which the same
is to be performed.
Figure 1 represents a plan of a three-die screw stock constructed according
to my Invention; Figure 2 is a side elevation of the same; Figure 3 is a
cross section of the same taken through the line a, Figure 1; and Figure 4
is also a cross section taken through the line b, Figure 1. The same letters
indicate the same parts in Figures 1, 2, 3 and 4.
is the solid body of the screw stock, in which an opening or series of
openings is made for the reception of the stationary screwing died and
nioveable screwing dies e, f. At one end of the stationary die d is a flange
or shoulder d² of a diameter somewhat greater than the opening in the stock
into which the said die fits, so that the said flange or shoulder projects under
the bottom of the body of the stock; and on the outer side of each of the
moveable dies e, f, is a similar flange or projection &, f³ (see the sections,
Figures 3 and 4). Near the opposite end of the stationary die d, and on
either side thereof, a longitudinal slot d³ is made, and near' the opposite ends
of the moveable dies e, f, and on the outer side of the said dies, a longitudinal.
slot e, f, is made. When the dies d, e, f, are put in their respective places in
the body of the stock the greater part of the slots d³, e³, f³, are situated above.

page_text: the plane of the top of the body of the stock. The dies are fixed in the
body of the stock by means of a plate 9, portions of the inner edge of which
plate are made to enter the slots d³, 6, and f, in the said dies, and thus prevent
them from falling from the stock while still permitting of the sliding of the
said dies in the body of the stock; as will be understood by an examination
of the Drawing: The plate 9 is secured in its place at one end by a screw h,
and at its opposite end by the pins i, i, under the heads of which it passes.
The moveable dies e, f, are advanced towards the stationary die d by means
of the screw collar k and rods 1, 1. The said parts k, l, however, constitute no
part of my Invention.
:
By constructing and arranging the dies and body of the three-die screw
stock in the manner described and represented, the ends of the dies, project
without obstruction from the surfaces of the stock, and headed bolts or other
similar articles can be screwed from point to shoulder by the use of the said
screw stock.
Figure 5 represents in plan a modification of the three-die screw stock,
Figures 1, 2, 3 and 4; Figure 6 is a cross section of the same through
the line a, Figure 5; and Figure 7 is also a cross section of the same
through the line b, Figure 5; Figure 8 is a plan and elevation of the
stationary die; and Figure 9 is a plan and elevation of one of the moveable
dies of the stock. The same letters indicate the same parts in Figures
5, 6, 7, 8, and 9.
:
one
In this modification of my Invention I dispense with the fastening plate. g,
Figures 1 and 2, and construct the dies and body of the stock in the
following manner :-At the side of the opening in the body m of the stock,
which receives the stationary die n is a longitudinal slot m², and on
side of the said stationary die n is a rib or projection n³ of a size proper
to fit in the said slot m³. In one side of each of the openings in the body of
the stock which receive the moveable dies o, p, is a longitudinal, slot 'm³, m³,
and on one side of each of the said moveable dies o, p, a rib or projection
03, p', is made to fit in the said slots m³, m³. By means of the said slots
m2, m³, and ribs n³, o, p³, the dies n, o, p, are fixed in the solid body m of the
stock while still capable, of sliding in the said body...In introducing the dies
n, o, p, into the body of the stock the screwed ends of the dies o; p, are placed
in the opening which receives the stationary die n, and the said dies are
depressed until, the ribs o³, p³, come opposite the slots m³, m³, when the said
ribs can be made to engage with the said slots' and the dies be moved to, their
places. The stationary die n is afterwards depressed in the centrál, opening

page_text: manner.
in the stock, and its rib n² made to engage with the slot m² in a similar
To facilitate the engagement of the ribs n³, o³, ps, of the dies n, o, p,
with the slots in the body of the stock the outer ends of the said ribs are
bevilled as represented at n³, p³, in Figures 8 and 9.
.. ..
This modification of my improved screw stock possesses all the advantages of
the screw stock first described, and in addition to which the dies are more
readily placed in and removed from the body of the stock and the separate
fixing plate is dispensed with.
Figure 10 represents in plan another modification of a three-die screw stock
constructed according to my Invention; Figures 11 and 12 are cross
sections of the same taken respectively through the lines a and b, Figure
10; Figure 18 is a side and end elevation of the stationary die; and
Figure 14 is a side and end elevation of one of the moveable dies of the stock.
In this modification of my Invention I make the stationary die q with a lip
or projection at its top edge and on either side, and cut away the metal of the
solid part of the stock rat on either side the opening which receives the said
stationary die, into which cut away parts the lips or projections q² fit. I also
make a similar lip or projections on the outer side of each of the moveable
dies s, s, and cut away the outer edges at 7 of the openings which receive the
said dies, into which cut-away parts the lips or projections & fit as will be
readily understood by an examination of the sections, Figures 11 and 12,
after the dies q and s, s, have been dropped into their places the said
dies are maintained in the stock by a covering plate t (indicated in dotted
lines in Figure 10) of the kind commonly used with ordinary three-die screw
stocks.
Although I have described and represented my Invention in connection
with three-die screw stocks, yet my Invention is equally applicable to
screw stocks having four screwing dies or a greater number than four.
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood that I do
not limit myself to the precise details herein described and illustrated, as
the same may be varied without departing from the nature of my Invention;
but 1 claim as my Invention the improved screw stock herein-before
described and illustrated in the accompanying Drawings, that is to say, a
screw stock having three or more screwing dies in which the said dies are
made to project without obstruction from the surfaces of the solid body of the
stock, the said dies being fixed in the body of the stock either by flanges at one
end bearing against the stock and grooves at the other end, in which a plate

page_text: is made to engage, or by ribs or projections on the sides of the dies engaging
with or taking into slots or depressions in the solid body of the stock, sub-
stantially as described and illustrated.
In witness whereof, I, the said Richard Bagley, have hereunto set my
hand and seal, this Sixth day of February, in the year of our Lord
One thousand eight hundred and sixty-seven.
Witness,
GEORGE SHAW.
RICHARD BAGLEY. (Ls.)