IMPROVEMENTS IN SPINNING
Year: 1876

page_text: LETTERS PATENT to Tom Mitchell, of Bradford, in the County of York, Spinner
and Manufacturer, for the Invention of "IMPROVEMENTS IN SPINNING."
aled the 28th March 1877, and dated the 11th November 187
PROVISIONAL SPECIFICATION left by the said Tom Mitchell at the Office
of the Commissioners of. Patents on the 11th November 1876.
TOM MITCHELL, of Bradford, in the County of York, Spinner and Manufacturer.
IMPROVEMENTS IN SPINNING."
The object of this Invention is to prevent the frequent breaking of ends in the
spinning of mohair yarns in consequence of the kemps and other fibres close to the
top flange of the bobbin cutting during revolution the thread that is being spun. I
accomplish this object by placing upon the top flange of bobbin a metallic or
composite cap resting upon and revolving with the bobbin, thus confining the ends
otherwise driven out by the centrefugal force of the bobbin in motion.
By means of this improvement much time is saved and a better yarn produced at
less cost of labor..
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Tom Mitchell in the Great Scal Patent Office on the 9th May 1877.
TOM MITCHELL, of Bradford, in the County of York, Spinner and Manufacturer.
"IMPROVEMENTS IN SPINNING."
The object of this Invention is to prevent the frequent breaking of ends in the
spinning of mohair and other fibrous substances in consequence of the kemps and
other fibres close to the top flange of the bobbin becoming entangled and breaking
down during revolution the thread that is being spun. I accomplish this object by
placing upon the top flange of bobbins a metallic, ivory, or composit cap resting
upon and revolving with the bobbin, thus confining the ends otherwise driven out
by the centrefugal force of the bobbin in motion.
By means of this improvement a yarn is produced containing fewer breakages
and "snarbs," and in addition to its general character being considerably smoother
it is when twisted a stronger, more uniform, and necessarily a much more valuable
171

page_text: production. And as the smaller the per centage of fibre singed in genapping a
corresponding increase must therefore give additional strength and weight, and as
the end of each burnt fibre and less lustrous than in its natural state the object of
genapping ("smootheness and lustre") is more perfectly accomplished.
But in order to enable my improvements to be better understood, I will proceed
to describe the same by reference to the accompanying Drawings, in which Figure 1
represents a front elevation shewing my improved cap; Figure 2 is a section of the
cap I propose to adopt.
Similar letters of reference are used in both the Figures to represent similar
parts.
On the top of the bobbin A I fix a cap of brass or any other suitable metal or
composition B which runs loose on the spindle C; the object of this is to prevent the
kemps of mohair or other fibre becoming entangled and breaking down during
revolution the thread that is being spun.
Having thus described my improvements and the best means I am acquainted
with for carrying the same into effect, I would have it understood that I do not
confine myself to the precise details shewn and described, as these may be varied;
what I claim is, the combination, construction, and employment of a cap for the
purpose and in the manner herein substantially described.
In witness whereof, the said Tom Mitchell hath hereunto set his hand and
seal, this Eighth day of May, in the year of our Lord One thousand eight
hundred and seventy-seven.
Witness,
JOHN WAUGH,
Engineer & Patent Agent,
Bradford,
Yorks.
TOM MITCHELL. (L.S.)