IMPROVEMENTS IN MACHINERY FOR DOUBLING
Year: 1878

page_text: LETTERS PATENT to George Pearson, of Stockport, in the County of Chester,
Thread Manufacturer, for the Invention of "IMPROVEMENTS IN MACHINERY
FOR DOUBLING."
Sealed the 8th April 1879, and dated the 17th October 1878.
PROVISIONAL SPECIFICATION left by the said George Pearson at the Office
of the Commissioners of Patents on the 17th October 1878.
GEORGE PEARSON, of Stockport, in the County of Chester, Thread Manufacturer.
"IMPROVEMENTS IN MACHINERY FOR DOUBLING."
My improvements consist in a novel arrangement of doubling machinery by
which the process of doubling and the machinery used therein are simplified and
the production increased; I attain this object in the manner following, that is to
say
I wind or spool in the ordinary way as many threads together as is desired, either
on a tube in the shape of a cop, or on a bobbin, and this cop or bobbin I mount
tightly upon a spindle so that it revolves with the same. The new doubled but
untwisted yarn I lead from the spindle through an eye placed centrally over the
spindle, and thence on to a bobbin or cop lying on a drum which is revolving at
such a rate that its surface which imparts motion to the surface of the bobbin or
cop on which the yarn is being wound, as in a drum winding frame is going slower
than the surface from which the thread is being unwound, the difference producing
the twist of the yarn. It will be observed that the flyer is being entirely dispensed
with, and that water troughs may be interposed for wetting, and gas or other flames
for singeing if desired, and a latch or catch or other weighting arrangement may be
employed for the bobbin on the drum, and any of the known traverse motions may
be used for laying the thread thereon.

page_text: Similar letters of reference denote corresponding parts of the machine.
Fig. 1 represents a cross section of a doubling machine; Fig. 2, an elevation, and
Fig. 3 a plan showing a modified arrangement of winding on the bobbin. From
these Figures well understood parts of a doubling machine, such as the traverse
motion, the change wheel arrangements, and other details which are not included in
the improvements, but have simply been adapted to the new arrangement with
such modifications as were necessary, have been omitted as unnecessary for the
purpose of illustrating my Invention.
Sand S' are two rails, the upper one S¹ carrying the bolster L', and the lower one
S, the footstep L; A is the spindle; W, the wharf by means of which A. receives the
rotary motion from the tin drum C through the cords or bands H; B is the bobbin
as taken from the winding frame and it is fixed tight on the spindle. The thread F
is drawn through the eye O round the small roller R and R' through the water
trough T to the bobbin D, which revolves by surface contact with the drum d, and
it is carried by the latch N. The rollers R and R¹ are part of the gasing apparatus,
and may be omitted or removed and replaced by any suitable guide.
The action is as follows:-The bobbin B, as filled on the winding frame, is placed
upon the spindle A, and the end of the thread F is drawn through the eye O and over
the rollers R and R' through the trough T, and fixed on the bobbin D. The latter
when set in motion by the drum d will draw the yarn off the bobbin B, and each
revolution of the latter will put as nearly as may be one turn or twist into the end
of yarn which is on its passage from one bobbin to another. In order to vary the
twist or number of turns in a given length of the yarn, the speed of the drums & is
varied by change wheels (not shown), the tin drum C being kept at an uniform
speed.

page_text: It will be observed that the flyer and the callender rollers are dispensed with as
unnecessary though they may be retained if preferred. The taking-up and
winding-on arrangement shown in the Drawing at D, d, and N is similar to that
usually adopted in drum winding frames and gasing frames, and may be varied at
pleasure. Another way is to use a larger drum and put two or more bobbins on,
making one drum serve both sides of the frame; Fig. 3 also shows a modification
consisting of a drum with vertical axis, the latches which carry the bobbins being
held to the drum by springs, and the traverse being upright instead of horizontal,
an arrangement in which one drum is sufficient for four bobbins.
Having now particularly described my Invention and ascertained in. what
manner the same is to be performed, I declare that I do not limit myself to the
precise details set forth for the purpose of illustration, but desire it to be under-
stood that I claim as my Invention substantially,-
The arrangement of doubling machines by which the yarn to be twisted is placed
on a spindle without flyer, ring, or other similar device, and revolves with the said
spindle while it is being drawn off by rollers, or preferably direct by the bobbin or
equivalent upon which it is wound again, such bobbin or equivalent receiving
motion in any suitable manner.
In witness whereof, I, the said George Pearson, have hereunto set my hand
and seal, this Fourteenth day of April, in the year of our Lord One
thousand eight hundred and seventy-nine.
Witness,
A. HILDEBRANDT,
Patent Agent,
Bow Chambers,
Manchester.
GEO. PEARSON. (L.S.)