AN IMPROVEMENT IN TWISTING PROVISIONAL SPECIFICATION
Year: 1867

page_text: LETTERS PATENT to James Holroyd, of Leeds, in the County of York,
Manufacturer, and William Fieldhouse, of Batley, also in the County of
York, Manufacturer, for the Invention of "AN IMPROVEMENT IN TWISTING
PROVISIONAL SPECIFICATION left by the said James Holroyd and William
Fieldhouse at the Office of the Commissioners of Patents, with their
Petition, on the 28th June 1867.
We, JAMES HOLROYD, of Leeds, in the County of York, Manufacturer, and
WILLIAM FIELDHOUSE, of Batley, also in the County of York, Manufacturer,
do hereby declare the nature of the said Invention for "AN IMPROVEMENT IN
TWISTING OR DOUBLING MACHINERY FOR PRODUCING A CERTAIN SPECIES OF YARN,"
to be as follows:-
The object of our Invention is to produce twisted yarn of uneven or
irregular twist, such irregularities occuring at stated intervals. To effect
this we drive the lower roller of the twisting or doubling frame by what may
be termed partial gearing, that is, by a wheel only partially toothed, the object
of this being to cause the front lower roller to be stationary at certain periods,

page_text: the flyers revolving at their accustomed speed, and the yarn which is being
wrapped round that issued from the front rollers and which is passed
independently over the upper front roller being twisted more closely on what
we may term the internal thread during such temporary stoppage of the
lower roller and producing the effect we desire, viz., a slack and a tight twist.
We also use a fixed guide with a slit in it for the threads to unite near the
top of the spindle.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Holroyd and William Fieldhouse in the Great Seal
Patent Office on the 27th December 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
HOLROYD, of Leeds, in the County of York, Manufacturer, and WILLIAM
FIELDHOUSE, of Batley, also in the County of York, Manufacturer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of June, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of
Her reign, did. for Herself, Her heirs and successors, give and grant unto
us, the said James Holroyd and William Fieldhouse, Her special licence that
we, the said James Holroyd and William Fieldhouse, our executors, adminis-
trators, and assigns, or such others as we, the said James Holroyd and William
Fieldhouse, our 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 "AN IMPROVEMENT IN TWISTING OR
DOUBLING MACHINERY FOR PRODUCING A CERTAIN SPECIES OF YARN," upon the
condition (amongst others) that we, the said James Holroyd and William
Fieldhouse, our executors or administrators, by an instrument in writing
under our or their hands and seals, or under the hand and seal of one
of us or them, 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.

page_text: NOW KNOW YE, that I, the said James Holroyd, on behalf of myself and
the said William Fieldhouse, do hereby declare the nature of the said Invention,
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement thereof, that is
to say:-
The object of our Invention is to produce twisted yarn of uneven or
irregular twist, such irregularities occuring at stated intervals. To. effect
this we drive the lower roller of the twisting or doubling frame by what may
be termed partial gearing, that is, by a wheel only partially toothed, the object
of this being to cause the front lower roller to be stationary at certain periods,
the flyers revolving at their accustomed speed, and the yarn which is being
wrapped round that issued from the front rollers and which is passed
independently over the upper front rollers being twisted more closely on what
we may term the internal thread during such temporary stoppage of the
lower rollers, and producing the effect we desire, viz., a slack and a tight
twist.
To the top board we affix a horizontal rod furnished with feet, and pro-
jecting some slight distance above and in front of the same, say two inches
each way. Also we mount upon the top board (say about three quarters of
an inch in height) small brackets placed at convenient intervals and to them
we secure a thin flat bar of metal placing it in proximity to the threads as
they pass down to their respective spindles. In such bar opposite to each
thread a slit or nick is cut.
The operation may be stated thus:-The wheel by which the lower rollers
are driven being only partially toothed such rollers stop along of course with
their upper ones (driven by friction in the usual way) at given intervals
dependant upon the amount or number and position of the teeth in the
driving wheel used relatively to the driven wheel. The spindles during such
temporary stoppage continue to revolve, and the outer yarn or that which has
to be twisted with the yarn issuing from the delivering rollers (having been
passed around the front part of the rod before alluded to) passing through
the slits or nicks in the flat bar referred to is twisted in the form of a knot
upon the internal yarn until the driving wheel in the course of its revolutions
comes into gear again, when the rollers rotating a slack twist is produced in
the ordinary manner, and the alternations of a slack and tight twist are pro-
duced ad infinitum.
Having now fully ascertained and described the nature of our Invention,
we wish it to be understood that what we claim as and of our Invention is,

page_text: the production of the species of yarn referred to, viz., with a slack and
a tight twist alternately by the means substantially as described.
In witness whereof, I, the said James Holroyd, have hereunto set my
hand and seal, this Thirteenth day of December, in the year of our
Lord One thousand eight hundred and sixty-seven.
Witness,
PHILIP H. SHARP,
Agent to the Patentees,
Leeds & Bradford.
JAMES HOLROYD. (L.S.)