Improvements in or connected with the Pirns or Bobbins used in the Spinning of Linen Yarn
Year: 1889

page_text: privation, TOLI IYUV., 1009
Complete Specification Left, 16th Aug., 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in or connected with the Pirns or Bobbins used in
the Spinning of Linen Yarn
1, JOSHUA VALENTINE EVES, of the Forth River Mills, Falls Road, Belfast, in the
County of Antrim, Ireland, Mill Manager, do hereby declare the nature of this
invention to be as follows:-
-
This invention relates to a certain class of the pirns or bobbins upon which linen
yarns are wound in spinning, and is designed with the object ofproviding a corrugated
paper tube or core inside the finished cop, to prevent the slipping or displacement of
the yarn in the cop after it is removed from the spindle.
The pirn or bobbin of either wood metal or other material is constructed internally
of a size to fit the spindle, and externally of any desired size, with a spiral groove
running for a part or the whole of its length. Over this is applied a tube or sleeve
of paper thin enough to be pressed into the groove by the damp yarn, as it is laid
upon it. When the yarn and tube have dried, the centre pirn or bobbin can be
screwed off. By this means a corrugated paper tube is formed inside the cop
which will prevent the yarn slipping during the subsequent operations to which it
is applied.
I am well aware that paper cop tubes and paper pirns have been used, also that
spirally grooved wooden or metal pirns have been used and such in themselves form
no part of my invention.
Datad this 19th doy of Navamb
1000
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with the Pirns or Bobbins used in
the Spinning of Linen Yarn.
I, JOSHUA VALENTINE EVES, of the Forth River Mills, Falls Road, Belfast, in the
County of Antrim, Ireland, Mill Manager, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to the spinning of linen yarn upon pirns or bobbins and is
designed with the object of providing a paper tube or core inside the cop which while
being easily removed from the pirn the yarn thereon will not be liable to slip or be
displaced, in the handling or packing thereof consequent upon the removal and
transfer of it from the spindle to the loom shuttle.
I find that if a thin paper tube be placed upon a pirn or bobbin made of wood or
other material previously provided with a spiral groove the tension of the wet or damp
yarn as it is wound upon the paper causes it to embed into and conform to the contour
of the wooden pirn or bobbin with the result that the paper tube is grooved or
corrugated both inside and outside. This result is of a decided benefit in two ways;
the full cop with its paper core is by a slight screwing motion easily removed from
the wooden pirn or bobbin, and the yarn is not liable to slip off or be displaced upon
its core.
The invention will be readily understood by reference to the accompanying
drawings.
. Fig. 1 is sectional elevation of a full cop of yarn, paper core, and wooden pirn in
accordance with my invention.

page_text: Fig. 2 elevation of wooden pirn.
Fig. 3 elevation of corrugated paper core removed from the yarn and pirn.
The pirn or bobbin A is constructed internally or bushed to fit the spindle and
externally of any desired size. On the external surface I cut or chase a spiral
groove a which extends for a part or the whole of the length of the pirn. To the
pirn A so prepared I apply a tube B of thin paper upon which the yarn is laid
during the operation of spinning. As the yarn is built up into a cop on the top of
the paper tube B the moisture in the yarn softens the paper and the tension presses
it into the groove a of the pirn A causing a corresponding groove b to be formed
thereon.
When the cop is full the pirn and yarn are together removed from the spindle
andafter being allowed to dry, the pirnA is removedfrom the centre of the paper tube B
by unscrewing it and the spiral groove or corrugations which remain in the paper
tube prevent the slipping of the yarn during the subsequent operations to which it is
subjected.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is
1
In the spinning of linen yarn upon pirns the use or combination with a spirally
grooved or corrugated pirn of a thin paper cop tube which by the moisture and
tension of the yarn is caused to conform to the corrugations of the pirn and thereby
formed into a grooved or corrugated paper tube substantially as and for the purposes
described.