IMPROVEMENTS IN MACHINERY EMPLOYED IN TWISTING OR DOUBLING YARNS OR THREADS
Year: 1881

page_text: LETTERS PATENT to Joseph Farrar, of Halifax, in the County of York,
Machine Maker, for an Invention of "IMPROVEMENTS IN MACHINERY
EMPLOYED IN TWISTING OR DOUBLING YARNS OR THREADS."
PROVISIONAL SPECIFICATION left by the said Joseph Farrar at the
Office of the Commissioners of Patents on the 10th January 1881.
JOSEPH FARRAR, of Halifax, in the County of York, Machine Maker.
"IMPROVEMENTS IN MACHINERY EMPLOYED IN TWISTING OR DOUBLING YARNS
OR THREADS."
This Invention relates to machinery employed in twisting or doubling two or
more threads together, and the object of the Invention is to stop the rotation of
the trap roller, or boss, or draw-drum, when one of the threads break, thereby
breaking the unbroken threads and completely preventing waste and "single."
These improvements have reference to Letters Patent granted to John Horrocks,
James Horrocks, and Edward Whalley, bearing date the 23rd day of June,
A.D. 1877, No. 2439, in the Specification of which Patent reference is made to, a
bevil wheel formed at the bottom of the trap roller, or boss, or draw-drum gearing
with a bevil wheel fixed onto a horizontal shaft, and apparatus is employed and
described for moving the trap roller out of gear, whereby rotation of the said roller
is stopped.
My Invention consists in the employment of simple and effective apparatus for
disengaging the bevil wheels referred to above. For this purpose I use the ordinary
single acting trap lever which acts direct on the trap roller.
This trap lever, which is heavier at one end than the other, works upon a
fulcrum, and when the machine is in operation the yarn which passes through
an eyelet at the lighter end of the said lever keeps the counterbalanced end of the
said lever clear of the flange or projections formed at the bottom of the said trap
roller, but immediately one thread breaks the counterbalanced end of the trap lever
is brought into contact with the projections formed at the bottom of the trap
roller, whereby the wheels are disengaged, the trap roller is stopped, and the
unbroken thread or threads break, so that no imperfect operation can proceed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Joseph Farrar in the Great Seal Patent Office on the 9th July
"E
:
1881.
JOSEPH FARRAR, of Halifax, in the County of York, Machine Maker.
IMPROVEMENTS IN MACHINERY EMPLOYED IN TWISTING OR DOUBLING YARNS
OR THREADS."
This Invention relates to machinery employed in twisting or doubling two or
more threads together, and the object of this Invention is to stop the rotation of
the trap roller, or boss, or draw drum when one of the threads break, thereby
breaking the unbroken threads and completely preventing waste and ". single."
These improvements have reference to Letters Patent granted to John Horrocks,
James Horrocks, and Edward Whalley, bearing date the 23rd day of June,
A.D: 1877, No. 2439, in the Specification of which Patent reference is made to a
bevil wheel formed at the bottom of the trap roller, or boss, or draw drum gearing
with a bevil wheel fixed onto a horizontal shaft, and apparatus is employed and
described for moving the trap roller out of gear, whereby rotation of the said
roller is stopped.
My Invention consists in the employment of simple and effective apparatus for
disengaging the bevil wheels referred to above. For this purpose I use the ordinary
single acting trap lever which acts direct on the trap roller. This trap lever, which
is beavier at one end than the other, works upon a fulcrum, and when the machine
is in operation the yarn which passes through an eyelet at the lighter end of the
said lever keeps the counterbalanced end of the said lever clear of the flange.or
projections formed at the bottom of the said trap roller, but immediately one
thread breaks the counterbalanced end of the trap lever is brought into contact
with the projections formed at the bottom of the trap roller, whereby the wheels
are disengaged, the trap roller is stopped, and the unbroken thread or threads
break, so that no imperfect operations can proceed.
In order that the Invention may be better understood I herein give reference to
the accompanying Sheets of Drawings, wherein Fig. 1 is cross section, Fig. 2 plan,
and Fig. 3 front view of so much of a twisting frame as is necessary to illustrate
my Invention. A is the trap roller, which is caused to rotate by means of bevil
wheel B from another bevil wheel C fixed on the continuously revolving shaft D.
On the upper side of the bevil wheel B are two projections E, shewn more clearly
in plan view Fig. 2.
The action of the apparatus is as follows:-
When the machine is at work and the yarn unbroken, the various parts of the
apparatus are in the positions shewn in Fig. 1, the trap lever F being clear of the
projections on the bevil wheel B, but should one of the threads break the remaining
thread or threads would not be strong enough to keep the end a of the trap lever
in the position shewn in Fig. 1, but it would rise, and the heavier end 6 of the trap
lever would lower into the position shewn in Fig. 4, consequently coming into
contact with the projections E on the bevil wheel B, thereby lifting or causing the
bevil wheel to rise or disengage with the continuously revolving wheel C, placing
one of the projections on the tingers G of the sliding rod H (shewn more clearly in
Figs. 2 and 3), and so stopping the rotation of the trap roller, by which means the
unbroken thread or threads would be broken and imperfect operations and "single"
prevented. When the broken threads are pieced, the projection E is removed off
the finger G, the bevil wheels are engaged, and the trap roller proceeds to deliver
the threads for twisting or doubling.
Having now described the nature of my said Invention, and described by
the aid of Drawings how the same may be carried into practice, I would have it

page_text: understood that I do not limit myself to the exact details or configuration of the
parts I have described and shewn, as the same may be varied or modified without
departing from the nature of my said Invention, but what I do claim and desire to
be secured to me by Letters Patent is,―
The employment of the single acting trap lever F for disengaging the bevil
wheels and stopping the rotation of the trap roller, substantially as herein shewn
and described.
In witness whereof, I, the said Joseph Farrar, have hereunto set my hand
and seal, this Eighth day of July, in the year of our Lord One thousand
eight hundred and eighty one.
JOSEPH FARRAR. (L.S.)