IMPROVEMENTS IN STOCKS AND DIES FOR SCREWING
Year: 1869

page_text: LETTERS PATENT to Alfred Muir, of the Firm of William Muir and
Company, of the Britannia Works, Strangeways, in the City of
Manchester, in the County of Lancaster, Machine Tool Makers,
for the Invention of "IMPROVEMENTS IN STOCKS AND DIES FOR SCREWING
Sealed the 2nd October 1869, and dated the 24th April 1869.
PROVISIONAL SPECIFICATION left by the said Alfred Muir at the
Office of the Commissioners of Patents, with his Petition, on the
24th April 1869.
I, ALFRED MUIR, of the Firm of William Muir and Company, of the
Britannia Works, Strangeways, in the City of Manchester, in the
County of Lancaster, Machine Tool Makers, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN STOCKS AND DIES POR
SCREWING BOLTS AND OTHER ARTICLES," to be as follows:-
The object of my Invention is to simplify the construction of stocks
and dies and to facilitate the operation of removing the dies from the
stocks.

page_text: In performing my Invention I make the stocks with rectangular
recesses, in which projections from the dies fit, and I make the screw
for regulating the position of the movable die to screw into a swivel
block jointed to the stocks; when this block is raised the dies can be
taken out, and when down the head of the regulating screw holds the
moveable die in its place. The head of the regulating screw is marked
with any number of divisions, which on turning the screw partly round
are brought in line with a mark on the movable die to regulate its
position according to the diameter of the screw to be cut.
The above details can be considerably modified, as an eccentric or
other equivalent may be substituted for the swivel block, or the swivel
block may be hinged to the stocks. My improvements in facilitating
the removal of the die from the stocks can be applied to stocks in which
the dies are fitted in the ordinary manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alfred Muir in the Great Seal Patent Office on
the 22nd October 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
MUIR, of the Firm of William Muir and Company, of the Britannia
Works, Strangeways, in the City of Manchester, in the County of
Lancaster, Machine Tool Makers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of April, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Alfred Muir, Her special licence that
I, the said Alfred Muir, my executors, administrators, and assigns,
or such others as I, the said Alfred Muir, my executors, adminis-
trators, 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 STOCKS
AND DIES FOR SCREWING BOLTS AND OTHER ARTICLES," upon the condition

page_text: (amongst others) that I, the said Alfred Muir, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of 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 I, the said Alfred Muir, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement (that is to say) :-
-
The object of my Invention is to simplify the construction of stocks
and dies and to facilitate the operation of removing the dies from the
stocks.
In performing my Invention I make the stocks with rectangular
projections, between which the dies fit, and I make the screw for
regulating the position of the moveable die to screw into a swivel
block jointed to the stocks; when this block is raised the dies can be
taken out, and when down the head of the regulating screw holds the
moveable die in its place. The head of the regulating screw is marked
with any number of divisions, which on turning the screw partly round
are brought in line with a mark on the moveable die to regulate its
position according to the diameter of the screw to be cut.
The above details can be considerably modified, as an eccentric or
other equivalent may be substituted for the swivel block, or the swivel
block may be hinged to the stock. My improvements in facilitating
the removal of the dies from the stocks can be applied to stocks
constructed in the ordinary manner.
And in order that my Invention may be fully understood and readily
carried into operation, I will proceed to describe the accompanying
Sheet of Drawings, reference being had to the figures and letters marked
thereon.
Figure 1 is a plan, Figure 2 is a side view partly in section, and
Figure 3 is a transverse section of one of my improved stocks and dies.
a is the body of the stock, which is made with a central slot or opening
and with rectangular projections, as shewn in Figure 3, between which
the dies b and c slide; these dics are plain rectangular pieces of steel

page_text: cut to the required thread, and the outer threads are partially removed
so as to divide the cutting more evenly on the other threads. The
moveable die c is set up towards the die 6 by means of the screw d,
which is screwed into the swivel block e; this block is jointed to the
stock a by the points of the set screws f. f. When the swivel block is
raised, as shewn by the dotted lines in Figure 2, the dies b and c can be
taken out with facility and others put in their places, and when the
block is down the head of the screw d bears against the moveable die c,
and by turning the screw d partly round the die c is set up to the
required extent. The head of the screw d is marked with any con-
venient number of divisions, which on turning the screw round are
brought in line with a mark on the die c; by this means the position
of the die can be regulated according to the diameter of the screw to
be cut.
The above details can be considerably modified, as an eccentric or
other equivalent may be substituted for the swivel block, or the swivel
block may be hinged to the stock. My improvements in facilitating
the removal of the dies from the stocks can also be applied to stocks
constructed in the ordinary manner.
Having thus stated the nature of my Invention, and described a
convenient mode of performing the same, I declare that I claim,-
First. The improved mode of constructing stocks and dies, as shewn
and described.
And, secondly. The swivel block e or its equivalent for facilitating the
removal of the dies from the stock, as shewn and described.
In witness whereof, I, the said Alfred Muir, have hereunto set
my hand and scal, this Twenty-first day of October One
thousand eight hundred and sixty-nine.
ALFRED MUIK.
(L.S.)