IMPROVEMENTS IN SELF-ACTING MULES FOR SPINNING
Year: 1873

page_text: LETTERS PATENT to John Thurlow, of Morley, near Leeds, in the
County of York, Self-acting Mule Spinner, for the Invention of
"IMPROVEMENTS IN SELF-ACTING MULES FOR SPINNING."
PROVISIONAL SPECIFICATION left by the said John Thurlow at the
Office of the Commissioners of Patents, with his Petition, on the
17th March 1873.
JOHN THURLOW, of Morley, near Leeds, in the County of York,
Self-acting Mule Spinner, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN SELF-ACTING MULES FOR SPINNING," (to be as
follows) :-
This Invention relates to the construction of apparatus for effecting
the revers of the carriage only when the rotation of the spindles is
arrested without sudden check or shock. This I accomplish by the
employment of apparatus for effecting a change of strap from tho

page_text: various driving pulleys only when the spindles have completed their
rotation.
I construct the cam lever with its upper portion separate from the
other part of the said lever, and the upper portion is by means of an
adjusting screw readily set, so that the studs on the "twist wheel will
only act on the said cam fork and the strap fork lever when the spindles
have completed their rotation. To the upper part of the backing-off
fork I attach an adjustable arm having a swell thereon, so that as the
said fork is by its cam turned forward on its stud or fulcrum, the pro-
jection or swell will thus be brought in contact with a friction bowl
attached to a boss on the worm shaft, so that the worm will be lifted out
of the worm wheel only when the spindles have completed their revo-
lutions, as the cam fork motion and backing-off fork are distinct and
independent of each other.
SPECIFICATION filed in pursuance of the conditions of the Letters
Patent, and of an Order of the Lord Chancellor, by the said John
Thurlow in the Great Seal Patent Office on the 13th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
THURLOW, of Morley, near Leeds, in the County of York, Self-acting
Mule Spinner, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing date the Seventeenth day of March, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said John Thurlow, Her special licence
that I, the said John Thurlow, my executors, administrators, and
assigns, or such others as I, the said John Thurlow, 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 SELF-
ACTING MULES FOR SPINNING," upon the condition (amongst others) that
I, the said John Thurlow, my executors or administrators, by an in-
strument in writing under my, or their, or one of their hands and

page_text: 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 on or
before the Fourteenth day of October 1873.
NOW KNOW YE, that I, the said John Thurlow, 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 and accompanying Sheets of Drawings, that is to
say:―
This Invention relates to the construction of apparatus for effecting
the reversing of the carriage only when the rotation of the spindles is-
arrested without sudden check or shock. This I accomplish by the
employment of apparatus for effecting a change of strap from the
various driving pulleys only when the spindles have completed their
rotation.
I construct the cam lever with its upper portion separate from the
other part of the said lever, and the upper portion is by means of an
adjusting screw readily set, so that the studs in the twist wheel will only
act on the said cam fork and strap fork levers when the spindles have
completed their rotation. To the upper part of the backing-off fork
I attach an adjustable arm having a swell thereon, so that as the said
fork is by its cam turned forward on its stud or fulcrum the projection or
swell will thus be brought in contact with a friction bowl attached to a
box on the worm shaft, so that the worm will be lifted out of the worm
wheel only when the spindles have completed their revolutions, as the
cam fork motion and the backing-off fork motion are distinct and
independent of each other.
DESCRIPTION OF THE DRAWINGS.
Figs. 1 and 2 represent such portions of a self-acting mule as are
necessary to illustrate my Invention; Fig. 3 is a view of the detached
part.
Fig. 4 shows the combination of the cam lever A with the adjustable
portion B adapted for application to the "Platt" machine; and Fig. 5
shews the same adapted for application to the "Tatham" machine.
The cam lever A. I construct with its upper portion B separate from
the other part of the said lever, which portion is by means of the

page_text: adjusting screw C readily set, so that the stud D in the twist wheel E
will only act on the said cam fork and strap fork levers when the spindles
have completed their rotation. To the upper part of the backing-off
fork F. I attach an adjustable arm G having a swell H thereon, so
that as the said fork is by the cam J (on the shaft J¹) turned forward on
its stud or fulcrum K, the projection or swell H will thus be brought
in contact with a friction bowl I attached to a box N on the worm
shaft P, so that the worm R will be lifted out of the worm wheel S only
when the spindles have completed their revolutions, as the cam fork
motion and the backing-off fork motion are distinct and independent of
each other.
Having thus fully described the nature and particulars of this my
said Invention, and shewn by Drawings in what manner the same is to
be or may be performed or carried into practical effect, I would have
it understood that what I claim is, the construction, application, and
use of apparatus by which the worm is lifted out of gear from the twist
wheel at a time only when the spindles have ceased to rotate.
In witness whereof, I, the said John Thurlow, have hereunto set
my hand and seal, this Sixteenth day of September, in the year
of our Lord One thousand eight hundred and seventy-three.
JOHN THURLOW. (L.S.)
Witness,
WN. TASKER,
of the Firm of Tasker & Brierley,
Patent Agents,
Halifax, Bradford, & Blackburn.