Improvements Applicable to Machinery for Doubling or Twisting Yarns or Threads.
Year: 1886

page_text: Improvements Applicable to Machinery for Doubling or
Twisting Yarns or Threads.
:
We, CLEMENT HOLDSWORTH, of the firm of John Holdsworth and Company,
Shaw Lodge Mills, Halifax, Yorkshire, Manufacturers,. THOMAS BARNES of the
same place, Overlooker, and JOSEPH HARDY of the same place, Mechanic do
bereby declare the nature of our invention for "IMPROVEMENTS APPLICABLE
TO MACHINERY FOR DOUBLING OR TWISTING YARNS OR THREADS and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
35
Our invention has reference to machinery employed in doubling or twisting two
or more yarns or threads into one yarn or thread, and our invention relates to that
class of doubling machine where vertical eyelet wires are employed suspended
upon each yarn or thread, and so placed in relation to other well known mechanism,
that when any one of the threads break, the vertical wire suspended thereon will
drop through a hole in a tilting plate, and come into contact with a rotary cam or
wiper, in such manner as to set in motion other mechanism which stops the
rotation of the spindle so as to prevent the formation of "single."
In practice it is found that when the thread breaks or becomes used up, that
the wire when liberated by the broken or used up thread, does not always drop,
but frequently remains stationary, in consequence of the oil and loose bits of fibre
sticking to it and getting into the holes in the perforated plate. To ensure that
these vertical wires shall always descend when set at liberty, we employ a series
of hammers or other devices for shaking or vibrating the tilting plate, so that the
wires therein will be shook loose and caused to drop.
In some cases light spiral springs may be employed to force the wires down
when liberated.
Such being the nature and object of our invention, we will now proceed to describe
the same more fully, and for that purpose make. reference to the accompanying
sheet of drawings illustrative thereof, wherein Fig. 1 is sectional end elevation of
so much of the parts of a doubling or twisting frame as is necessary to shew our
mprovements. A are the hooked vertical wires, capable of sliding up and down,
n holes made in the plate B, oscillating upon the central stud C, and D is the
otary cam or wiper, all arranged as usual. It will be understood that each thread

page_text: to be doubled passes through the eyelet formed on the top of each wire, and so
long as the thread is present, the wire is suspended thereby, in such manner that
the bottom thereof is clear of the rotary cam, but when the thread breaks or is
used up, the wire descends as shewn in dotted line, and comes into contact with
the rotary wiper which strikes the lower end of the wires, causing the plate B to
oscillate, and so set in motion other well known mechanism for stopping the
rotation of the spindle.
.
As the wires do not always drop when liberated, we cause the plate E, to which
plate B is attached, to vibrate, so as to ensure the wires falling when the thread
breaks or is used up. To vibrate the plate we hinge hammers F, on rod G,
running the whole length of the machine, the said hammers being placed at
suitable distances apart. These hammers are lifted by cam H, fixed to rotary
shaft I, driven by strap from pulley J, on the end of the wiper shaft D. It will
therefore be seen that as the hammers strike the plate E, it will vibrate and shake
the wires loose, thereby ensuring them to drop when the threads cease to support
them.
In Fig. 2, we have shewn light spiral springs a, around each wire, which will
also ensure the dropping of the wires set at liberty.
By the application of our invention to doubling and twisting frames, the
formation of "single" is rendered impossible, and there is no difficulty in doubling
very fine yarns.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
The means substantially as herein described and shewn (or its equivalent) for
causing the vibration of the plates and wires, to ensure the latter dropping when
set at liberty.