IMPROVEMENTS IN STRETCHING AND DRAWING ROLLERS FOR SPINNING."
Year: 1871

page_text: LETTERS PATENT to Thomas Unsworth, of Manchester, in County
of Lancaster, Machinist and Doubler, for the Invention of
"IMPROVEMENTS IN STRETCHING AND DRAWING ROLLERS FOR SPINNING."
PROVISIONAL SPECIFICATION left by the said Thomas Unsworth at the
Office of the Commissioners of Patents, with his Petition, on the
8th December 1871.
I, THOMAS UNSWORTH, of Manchester, in County of Lancaster,
Machinist and Doubler, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STRETCHING AND DRAWING ROLLERS FOR
SPINNING," to be as follows:-
This Invention relates to and forms part of an Invention patented by
me on the 25th of April in the present year, numbered (1088), and is
for extending the usefulness of such part. In that Patent I claim for
stretching my strands, and doubling and again stretching while doubling.

page_text: a series of conical flat-bottomed grooved pullies, which, by the increasing
diameter from small to large, when a thread or strand of any kind is
wound round from small to large several times.
I have discovered that I can use these same conical rollers with great
advantage for drawing and stretching in place of, or in conjunction with,
the present drawing rollers, and may be used in any convenient position
for spinning cotton, flax, wool, worsted, silk, hemp, and any other
fibrous material, and can likewise be applied to drawing, slubbing,
intermediate, roving, mule, throstle, and to all ordinary doubling frames.
I do it by simply fixing one or more pairs of them (to each spindle) in
an horizontal, vertical, or other position, according to the requirements
or make of the machine for hemp or spinning frames of that class. I
place them in front of the revolving frame, and they thus act as drawing
as well as stretching rollers.
·SPECIFICATION filed in pursuance of the conditions of the Letters
Patent, and of an Order of the Lord Chancellor, by the said Thomas
Unsworth in the Great Seal Patent Office on the 21st June 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
UNSWORTH, of Manchester, in the County of Lancaster, Machinist and
Doubler, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of December, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Thomas Unsworth, Her special
licence that I, the said Thomas Unsworth, my executors, administrators,
and assigns, or such others as I, the said Thomas Unsworth, 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
STRETCHING AND DRAWING ROLLERS FOR SPINNING," upon the condition (amongst

page_text: •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 on
before the Twenty-first day of June, One thousand eight hundred and
.seventy-two.
or
NOW KNOW YE, that I, the said Thomas Unsworth, 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 :-
Hereunto I have annexed a Sheet of Drawings shewing a pair of my
conical rollers as used for doubling and stretching three threads of yarn,
the three threads a, b, and c, coming from bobbins to groove d, on first
roller A, round groove d to roller B, and round groove e back again to
roller A, thence round groove f, and again to roller B, and so on over as
many grooves in the two rollers as the nature of the material and the
amount of stretch in the yarn or other material require.
It will be observed that the threads pass from bobbins or other
equivalent on to small end of conical roller A, and round from thence to
large end of second roller B, and again round next larger groove in
roller A, and so on until it is doubled and stretched of at large end of
conical roller B, the stretching being effected between and on the several
rollers by the increase of diameter in the groove in roller B. As the
yarn passes from small end of cone A to larger end of cone B, the yarn or
other material being relieved of the stretch by the time it has passed
round the several grooves, as the diameters become more equal or
reversed, the yarn or other material passes thence from such rollers, and
the twist put into it by flyer or any other means, the nature of the
material or the user of the rollers may have or desire; they may be used
for back drawing rollers in spinning mules with or without present front
rollers, or vice versa. They may be used in any kind of spinning or
doubling machine where drawing or stretching is required, and for any
class of fibrous material. These cone pullies or rollers may be milled
at the bottom if desireable. I have applied them to drawing, slubbing,
intermediate, roving, mule, throstle, and to all ordinary doubling frames.
I can fix them in a vertical, horizontal, or any other position with

page_text: equal advantage and effect; for hemp or flax I place them in front of
the revolving frame, and they act as drawing as well as stretching rollers.
Having described my Invention, and the different purposes it can be
applied to, as well as the way in which it works, I wish it to be under-
stood I do not confine myself to any particular size or number of grooves
in them nor their position at work; but what I claim as secured to me
herein is, for conical flat-bottomed grooved pullies or rollers, as and for
the purposes herein described.
In witness whereof, I, the said Thomas Unsworth, have hereunto set
my hand and seal, this Fifteenth day of June, in the year of
our Lord One thousand eight hundred and seventy-two.
THOMAS UNSWORTH. (L.S.)