IMPROVEMENTS IN SCREW STOCKS AND VICES
Year: 1874

page_text: LETTERS PATENT to John Grindrod, of Salford, in the County of
Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN SCREW
STOCKS AND VICES."
Sealed the 6th November 1874, and dated the 3rd September 1874.
PROVISIONAL SPECIFICATION left by the said John Grindrod at the
Office of the Commissioners of Patents, with his Petition, on the
3rd September 1874.
I, JOHN GRINDROD, of Salford, in the County of Lancaster, Engineer,
5 do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN SCREW STOCKS AND VICES," to be as follows:-
This improved machinery is an improvement upon the apparatus
described in the Provisional Specification of the Patent applied for by
Thomas Goode Messenger on the 8th day of August 1865, No. 2055,
O and it consists of two main parts, one being a vice for holding the article
to be operated upon, and the other a box containing the tools for

page_text: screwing, cutting, and turning the same. The vice is provided with a
boss fitting into a tube cast with the tool box. The vice is provided
with V clamps, which are moved to and fro by said screws, according to
the size of the pipe or other article to be operated upon, and the tool
box has. three or other convenient number of grooves for the dies or
cutting tools, which are set up by eccentric cams, as in ordinary screwing
machines. The tool box is provided on one end with a spur or bevel or
worm wheel or pulley, which may be actuated by other wheels, worms,
straps, or bands, or by a hand winch.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Grindrod in the Great Seal Patent Office
on the 2nd March 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GRINDROD, of Salford, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of September, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc.
cessors, give and grant unto me, the said John Grindrod, Her special
licence that I, the said John Grindrod, my executors, administrators,
and assigns, or such others as I, the said John Grindrod, 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 "IMPROVEMENTS IN
SCREW STOCKS AND VICES," upon the condition (amongst others) that I, the
said John Grindrod, my executors or administrators, by an instrument

page_text: a is the body of the vice, and b, b, are two V clamps, which are let
into slots in the piece a, and are set up by the screws c, c, to hold the
pipe or other article on which the screw thread has to be cut. The
piece a may be provided with legs or fixed to a stand, or it may be
secured to a bench, as shewn in Fig. 4, by means of the trunnion a',,
which is held in a spring clip e, to allow the whole apparatus to be
swivelled round or set horizontally or to any angle, according to the
length of the pipe or other article to be operated upon. To the piece a
is cast the boss a², which fits into the tube f, and both the boss and the
tube are cast with openings to reduce the weight of the apparatus. The
tube has slots f¹, through which the set screws f³ pass; these set
screws are tapped into the boss a². By this means the tube fis capablo
of moving to and fro on the boss a³, but it is not allowed to turn round
upon it. To the tube fare cast brackets supporting the shaft
which is the worm g¹ gearing into the wheel & forming the tool box.
The wheel has a boss fitting into the upper end of the tube f, and by
turning the shaft. g round by a handle the worm g' causes the tool box h
to revolve. The cutting dies i, i, i, are set up against the pipe or other'
article to be screwed by the wedge j, which acts on an incline on the
inside of the wheel ; this action causes the cover k to move partly
round, thereby bringing three eccentric cams on the inside of the cover
against the curved ends of the dies i. This mode of setting up the dies
is in common use in ordinary screwing machines.
'
9, on
When the screw to be cut is longer than the traverse of the tube fon
the boss a² it is necessary to slacken the clamps 6 when a portion of the
screw has been cut, and then to lower the apparatus on the article to be
screwed, and then to start again.
I wish to remark that the tool box, instead of being cast to the worm
wheel h, as shewn, may be cast or fixed to a spur or bevel wheel or to a
pulley, which may be actuated by pinions, straps, or bands.
Having thus stated the nature of my Invention, and described a con-
venient manner of performing the same, I wish to remark that I do not
limit myself to the details given, but that I claim, the improved screw
stocks as shewn and described, and the mode of securing the article to
be screwed therein.

page_text: I also claim, the spring clip for holding the swivel vice, as shewn in
Fig. 4.
In witness whereof, I, the said John Grindrod, have hereto set
my hand and seal, this First day of March One thousand eight
hundred and seventy-five.