IMPROVEMENTS IN MACHINERY FOR DOUBLING AND TWISTING VARN AND THREAD
Year: 1876

page_text: LETTERS PATENT to James Coats, jr., of Paisley, in the County of Renfrew, for
the Invention of "IMPROVEMENTS IN MACHINERY FOR DOUBLING AND TWISTING
VARN AND THREAD.”
Scaled the 5th May 1876, and dated the 11th February 1876.
PROVISIONAL SPECIFICATION left by the said James Coats at the Office of
the Commissioners of Patents on the 11th February 1876.
JAMES COATS, jr., of Paisley, in the County of Renfrew.
MACHINERY FOR DOUBLING AND TWISTING YARN AND THREAD."
"IMPROVEMENTS IN
In doubling and twisting machines of the ordinary construction it is customary
to employ rollers to draw the yarn off the bobbins of the creel, and as the yarns
are usually taken through water the said rollers are covered with brass to prevent
corrosion. Now my Invention consists in dispensing with the above rollers and in
unwinding the doubled yarns from bobbins which bear upon narrow drums mounted
on a shaft; these bobbins are supported in swing forks supported on a fixed rod.
As the yarn is unwound off the bobbins the flanges of the bobbins pass on each side
of the narrow unwinding drums; by this means the yarns on all the bobbins are
delivered at a uniform velocity to the twisting spindles on which the doubled yarn
is wound. The twist is given by a ring and traveller or other flyer as usual.
The forks above referred to for the bobbins are held in position on the rod by set
washers, one of which has a notch for a catch projecting from the fork. The object
of this is to hold the bobbin out of contact with the unwinding drum when
piecing up a broken end.
By means of this Invention the construction of the machine is simplified and
waste is avoided, as when the yarn breaks between the spindle and the unwinding
drum the loose end is drawn back and re-wound on the drum bobbin.
The machine may be made with two rows of unwinding drums and with a row
of spindles at each side.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Coats in the Great Seal Patent Office on the 5th August
1876.
JAMES COATS, junior, of Paisley, in the County of Renfrew.
MACHINERY FOR DOUBLING AND TWISTING YARN AND THREAD."
"IMPROVEMENTS IN
In doubling and twisting machines of the ordinary construction it is customary to
employ rollers to draw the yarn off the bobbins of the creel, and as the yarns are
usually taken through water the said rollers are covered with brass to prevent
corrosion. Now my Invention consists in dispensing with the above rollers and in
unwinding the doubled yarns from bobbins which bear upon narrow drums mounted
on a shaft; these bobbins are supported in swing forks supported on a fixed rod.
As the yarn is unwound off the bobbins the flanges of the bobbins pass on cach
side of the narrow unwinding drums. By this means the yarns on all the bobbins
are delivered at a uniform velocity to the twisting spindles on which the doubled
yarn is wound. The twist is given by a ring and traveller or other flyer as usual.
The forks above referred to for the bobbins are held in position on the rod by set
washers, one of which has a notch for a catch projecting from the fork. The object
of this is to hold the bobbin out of contact with the unwinding drum when piccing
up a broken end.
By means of this Invention the construction of the machine is simplified and
waste is avoided, as when the yarn breaks between the spindle and the unwinding
drum the loose end is drawn back and re-wound on the drum bobbin.
The machine may be made with two rows of unwinding drums and with a row
of spindles at cach side.
And in order that my Invention may be fully understood I will proceed to
describe the accompanying Sheet of Drawings, in which Fig. 1 is a sectional
elevation and Fig. 2 a front view of part of an ordinary ring and traveller doubling
and twisting frame to which my improvements are applied; Figs. 3 and 4 are
detached views of part of the same.
a, a, are the bobbins on which the doubled or twisted yarn or thread is wound
by rings and travellers or by flyers as usual; b, b, are the spindles driven by bands
from the drums c, c; and d, d, are the troughs containing water or other liquid.
All these parts are made in the ordinary manner.
Instead of the usual creel and the brass rollers generally employed for drawing
the yarn or thread off the bobbins of the creel I employ the following parts:-
e, e, are two shafts on which are keyed the narrow drums f, f. These shafts are
turned slowly round from one of the drums c by the train of pinions and wheels
shewn or in any other convenient manner. Above the shafts c are the fixed rods
99, supporting the swing forks in which are curved slots for the pivots of the
flanged bobbins i. These bobbins contain the yarns or threads to be twisted and
doubled, and they bear upon the narrow drums f the flanges of the bobbins fitting
on each side of the drums. The yarns or threads being unwound by the friction of
the drum pass under and over the guide rods in the trough and are then wound on
the bobbins a in the ordinary manner.
The swing forks are held laterally on the rods g by the set washers j, to cach
of which is cast a notch, and to each swing fork is jointed a catch. When an end
breaks the attendant raises the swing fork until the catch takes on the notch, as
shewn to the left-hand side of Figure 3, to hold the bobbin out of contact with the
unwinding drum until the end has been pieced up.
By means of this Invention waste is almost entirely avoided, as when an end
breaks between the bobbin and the unwinding drum the loose end is drawn back
and re-wound on the bobbin.
Having thus stated the nature of my Invention, and described a convenient
mode of performing the same, I wish it to be understood that I do not intend to
limit myself to the details given, as the same may be modified; and I claim the

page_text: improved combination of machinery shewn and described for unwinding yarns or
threads off bobbins, and for delivering them to the bobbins on which they are
wound when doubled and twisted.
In witness whereof, I, the said James Coats, junior, have hereto set my
hand and seal, this Third day of August, One thousand eight hundred and
seventy-six.
JAMES COATS, Jr. (L.S.)