CERTAIN IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DOUBLING YARN OR THREAD
Year: 1861

page_text: LETTERS PATENT to Thomas Bradshaw, of Salford, in the County of
Lancaster, Millwright, for the Invention of "CERTAIN IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR DOUBLING YARN OR THREAD."
Sealed the 31st October 1861, and dated the 3rd May 1861.
PROVISIONAL SPECIFICATION left by the said Thomas Bradshaw at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
May 1861.
I, THOMAS BRADSHAW, of Salford, in the County of Lancaster, Millwright,
do hereby declare the nature of the said Invention for "CERTAIN IMPROVEMENTS
IN MACHINERY OR APPARATUS FOR DOUBLING YARN OR THREAD," to be as
follows:-
My Invention is designed for the purpose of preventing- the "waste" arising
from the yarn when it becomes disunited accumulating around the delivery
rollers. The improvements consist in mounting the top rollers, by their central
shafts, upon two small levers, which are so governed by springs or weights as
to allow the top rollers to bear upon the bottom one with just sufficient
friction to be driven. Between the two levers a small roller or rod extends
in front of the top roller, the tension of the yarn passing over the rod being
so adjusted as to balance the spring, but in the absence of the yarn
springs or weights raise the levers, and lift the top roller from the bottom
one, and so stop the top roller, and prevent the accumulation of "waste"
around the rollers.
the

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Bradshaw in the Great Seal Patent Office on the 1st
November 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
BRADSHAW, of Salford, in the County of Lancaster, Millwright, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of May, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Thomas Bradshaw, Her special license that I, the said Thomas Brad-
shaw, my èxecutors, administrators, and assigns, or such others as I, the said
Thomas Bradshaw, 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 "CERTAIN IM-
PROVEMENTS IN MACHINERY OR APPARATUS FOR DOUBLING YARN OR THREAD,"
upon the condition, amongst others, that I, the said Thomas Bradshaw,
by an instrument in writing under my hand and seal, 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 Thomas Bradshaw, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement and accompanying Drawings (that is to say) :—
My Invention is designed for the purpose of preventing the "waste" arising
from the yarn when it becomes disunited accumulating around the delivery
rollers. The improvements consist in mounting the top rollers, by their
central shafts, upon two small levers, which are so governed by springs or
weights as to allow the top rollers to bear upon the bottom one with just
sufficient friction to be driven. Between the two levers a small roller or rod
extends in front of the top roller, the tension of the yarn passing over the rod
being so adjusted as to balance the spring, but in the absence of the yarn, the
springs or weights raise the levers, and lift the top roller from the bottom

page_text: one, and so stop the top roller, and prevent the accumulation of waste around
the rollers.
In order that the Invention may be better understood and explained in
detail, I have hereunto attached a Sheet of Drawings made upon a scale of
about six inches to the foot, and having similar letters of reference marked
upon corresponding parts of the mechanism.
Fig. 1 represents that portion of the machine to which my improvements
are applied shew in section, the top roller being raised as and when the yarn
is broken; Fig. 2 is also a sectional view, shewing a modification in which the
roller is stopped without being raised from contact with the bottom roller by
means of the friction of the yarn on its surface when held by a clip shewn
separately in Fig. 3, and Fig. 4 is a plan view of Fig. 2.
In Fig. 1, is a, a, is the framing of the machine; b, b, the bottom roller; and
c, c, the top rollers, the top rollers being supported upon the levers d, d, at one
end of which the weight or spring e is applied, the opposite extremities of the
levers being united by the rod or roller f, over which the yarn passes from
the rollers to the flyer. When the yarn is entire its tension is sufficient to
raise the weight e, and to allow the top roller to be in contact with the lower
one; but in the event of the yarn being disunited, the weight raises the top
roller and stops it, thereby preventing the loose end of the yarn accumulating
around the rollers.
In Figs. 2 and 4, 9, 9, are the top rollers, and h, h, the bottom roller; i, i,
are the holding clips shewn separately in Fig. 3, and k, k, are the levers
turning on the centres l, l, and provided with weights, and united at their front
ends by the rods m, m, in a similar manner to the arrangement shewn in
Fig. 1, the action of the various parts being as follows:-So long as the
yarn remains unbroken it runs over the upper part n of the holding clip, and
under the arm o attached to the lever, the arm o being kept clear of the
yarn by the tension of the yarn passing over the rod m; but on the occasion
of the yarn breaking, the weighted ends of the levers fall, being no longer
sustained by the tension of the yarn, and the arm o bearing on the yarn forces
it into the centre slit in the holding clip, which instantly arrests the yarn, and
prevents its delivery to the rollers.
Having now described the nature of the said Invention, together with the
method of carrying the same into practical effect, I would remark, in con-
clusion, that I claim,―
First, raising the upper roller from the lower one by the self-acting means
described, in the absence of the yarn, and for the purpose of preventing the

page_text: accumulation of the yarn upon the rollers, which would otherwise cause much
waste.
And, secondly, the modification of the same, as herein described and fully
illustrated in the accompanying Drawings.
In witness whereof, I, the said Thomas Bradshaw, have hereunto set
my hand and seal, this Thirty-first day of October, in the year of our
Lord One thousand eight hundred and sixty-one.
THOMAS BRADSHAW. (L.S.)