IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CUTTING THE THREADS OF SCREW BOLTS, NUTS, AND OTHER ARTICLES.”
Year: 1875

page_text: LETTERS PATENT to John Thomas Walton, of Hunslet, near Leeds,
in the County of York, for the Invention of "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR CUTTING THE THREADS OF SCREW BOLTS,
NUTS, AND OTHER ARTICLES.”
PROVISIONAL SPECIFICATION left by the said John Thomas Walton
at the Office of the Commissioners of Patents, with his Petition,
on the 16th April 1875.
I, JOHN THOMAS WALTON, of Hunslet, near Leeds, in the County of
York, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN MACHINERY OR APPARATUS FOR CUTTING THE THREADS OF SCREW
BOLTS, NUTS, AND OTHER ARTICLES," to be as follows:-
The object of my Invention is to prevent the necessity of stopping or
reversing the motion of the machine to change the bolts or other
articles, also so to arrange the dies and parts connected therewith that
they (the dies) may be readily changed when required. This arrange-

page_text: "
or face
ment, with modifications in some of its parts, may be employed for
cutting the thread of screw bolts and other articles, also for tapping
nuts, and is as hereafter described. On a suitable bed I mount and fix
an adjustable bracket, on which is provided a fixed "chuck
plate, in which is fitted so as to slide freely one or more jaws for
carrying the dies. The jaws are opened or closed by means of a disc
which is fitted into the bracket so as to work freely, and provided with
one or more eccentric slots or grooves into which the projecting bosses
or studs which are provided on the jaws are passed. By turning the
disc which is readily and quickly done by the attendant by means of a
suitable lever attached thereto, the motion is transmitted from the
eccentric slots or grooves through the studs or bosses on the jaws,
whereby the jaws carrying the dies are caused to move inwards or out-
wards as required.
Any required pressure may be imparted to the dies through the
herein-before mentioned lever attached to the disc. A thread having
been cut on the bolt or other article, the dies are opened, and the bolt
or other article withdrawn without the necessity of unscrewing them
from the dies.
-
I provide a head stock in combination with the above which I by
preference attach to the same bed as the herein-before mentioned
bracket, and in which is mounted in suitable bearings a hollow spindle,
to which is given a rotary motion, being transmitted thereto through
suitable gearing and driving pulleys. Within this hollow spindle is
keyed, so as to slide freely, another hollow spindle, at the end of which
is keyed or otherwise fastened a "chuck" of ordinary construction for
holding the article to be operated upon.
The sliding spindle is brought towards the dies herein-before mentioned
by ordinary means, and the operation proceeded with as in ordinary screw
bolt machines. The sliding spindle is made hollow to admit of any
required length of bolt or rod.
When the machine is required for cutting the threads in nuts, the tap
is held in the "chuck" of the hollow sliding spindle and the nut
between the jaws on the herein-before mentioned fixed backet.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Thomas Walton in the Great Seal Patent
Office on the 16th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
THOMAS WALTON, of Hunslet, near Leeds, in the County of York,
send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixteenth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said John Thomas Walton,
Her special licence that I, the said John Thomas Walton, my executors,
administrators, and assigns, or such others as I, the said John Thomas
Walton, 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 MACHINERY OR APPARATUS FOR CUTTING THE THREADS OF
SCREW BOLTS, NUTS, AND OTHER ARTICLES," upon the condition (amongst
others) that I, the said John Thomas Walton, my executors or ad-
ministrators, 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 John Thomas Walton, 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, reference being had to the accompanying
Sheet of Drawings and to the letters of reference marked thereon, that is
to say:
-
The object of my Invention is to prevent the necessity of stopping or
reversing the motion of the machine, to change the bolts or other
articles, also so to arrange the dies and parts connected therewith, that

page_text: cutting the thread of screw bolts and other articles, also for tapping nuts,
and is as hereafter described.
And in order that my Invention may be more completely understood,
reference is given to the Drawings annexed hereunto and to the letters
of reference marked thereon.
DESCRIPTION OF DRAWINGS.
Figure 1 is a side elevation; Figure 2, an end elevation; and Figure
3, a section through A, B, Figure 1. On a suitable bed a I mount and
fix an adjustable bracket b, on which is provided a fixed "chuck" ог
face plate, in which is fitted so as to slide frecly one or more jaws d for
carrying the dies e. The jaws & are opened or closed by means of the
disc f, which is fitted into the bracket b, so as to work freely, and pro-
vided with one or more eccentric slots or grooves g, into which the
projecting bosses or studs (which are provided on the jaws d) are
passed. By turning the disc, which is readily and quickly done by the
attendant by means of a suitable lever i attached thereto, thc motion is
transmitted from the eccentric slots or grooves through the studs or
bosses on the jaws d, whereby the jaws d carrying the dies e, are
caused to move inwards or outwards as required.
Any required pressure may be imparted to the dies e through the
herein-before mentioned lever i attached to the disc f. A thread having
been cut on the bolt or other article, the dies e are opened, and the bolt
or other article withdrawn without the necessity of unscrewing them
from the dies e.
I provide a headstock J in combination with the above which I by
preference attach to the same bed a as the herein-before mentioned
bracket b, and in which is mounted in suitable bearings a hollow spindle
k, to which is given a rotary motion, this being transmitted thereto
through suitable gearing and driving pulleys m. Within this hollow
spindle k is keyed so as to slide freely another hollow spindle » at the
end of which is keyed or otherwise fastened a "chuck" o of ordinary
construction for holding the articles to be operated upon.
The sliding spindle n is brought towards the die e herein-before {
mentioned by ordinary means, such as by the rack and pinion shown

page_text: here, and the operation is proceeded with as in ordinary screw bolt
machines. The sliding spindle is made hollow to admit of any
required length of bolt or rod.
When the machine is required for cutting the threads-in nuts, the tap
is held in the "chuck" of the hollow sliding spindle n and the nut
between the jaws d on the herein-before mentioned -bracket b.
Having now described the nature of my said Invention, and shown by
Drawings how the same may be carried into practice, I would have it
understood that I do not limit myself to the exact limits, details, or
configuration of the various parts I have explained or shewn, but what
I do claim and desire to be secured to me by Letters Patent is,―
Firstly. The arrangement and construction of the means or apparatus
employed for actuating the dies e, substanially as, and for purposes
herein set forth.
Secondly. The dies e and parts connected therewith, in combination
with the headstock j and the other parts of tho machine, substantially
as set forth.
11
MI
In witness whereof, I, the said John Thomas Walton, have hereunto
set my hand and scal, this Thirteenth day of October, in the
year of our Lord, One thousand cight hundred and seventy-five.