Improvements in Machinery for Doubling and Twisting Yarns or Threads.
Year: 1885

page_text: Improvements in Machinery for Doubling and Twisting Yarns
or Threads.
"
I, JOSEPH FARRAR of Globe Works, Halifax, Yorkshire, Machine Maker do
hereby declare the nature of my invention for IMPROVEMENTS IN MACHINERY
FOR DOUBLING AND TWISTING YARNS OR THREADS" to be as follows:―
My invention has reference to prior Letters Patents granted to Thomas Coltman
No 842 A.D. 1879 and N° 1749 A.D. 1879 which inventions consisted in the
employment of apparatus (when one of the threads broke) for automatically
stopping the rotation of certain well known delivery rollers so as to prevent the
formation of "single."
One part of the mechanism employed by Coltman and described in his specifica-
tions consisted of a key or driving pin marked B2 and of a ring-spring marked B¹
both fixed in a collar or boss and employed for the purpose of rotating certain
ratchet wheels, but when the said ratchet wheels are prevented from rotating by
mechanism employed for that purpose, the ring-spring gives way and allows the
driving key to slip over certain inclines, so as not to operate the ratchet wheels.
My Invention has reference to the ring-spring, which as at present constructed is
formed after the manner of a split ring-that is to say-it is a flat spring where
the meeting ends overlap each other.
These ring-springs are placed in an annular groove formed in the boss, but as the
rings are in no way fixed in the annular groove, in practice it is found that they
gradually move around until their meeting ends come opposite to the driving pin,
in which case the said pin enters the overlapping ends of the ring, and gradually
works itself in front thereof, consequently the spring is made of no avail and the
keys fail to do the work intended. To obviate this, the ring-spring in some cases
has been dispensed with and a flat spring attached to the key has been employed
instead, but the springs did not give satisfaction as they frequently broke causing
the machine to be a failure.
.
My Invention is intended to make a spring without any of the disadvantages
above named, and yet to be cheap in construction and certain in its action.

page_text: According to my invention I employ a ring-spring, but so made that the ends
thereof do not meet, consequently there is a greater elasticity in the spring than is
possible where the meeting ends overlap.
I also form one end of this spring with a pin or projection which is inserted in a
hole formed in the annular ring, by which means when it is once inserted and
fixed in its place it cannot work around the groove as those at present in use.
Instead of having a pin on the ring and placing it in a hole to make it secure,
one end of the said ring may be revitted to the boss, or otherwise held to prevent
its working around. By these means the key is allowed all necessary freedom, and
there is no liability for it to fail in its action,

page_text: COMILLIE DIECIFICATION,
Improvements in Machinery for Doubling and Twisting Yarns
or Threads.
I, JOSEPH FARRAR of Globe Works Halifax, Yorkshire, Machine Maker do
hereby declare the nature of my invention for IMPROVEMENTS IN MACHINERY
FOR DOUBLING AND 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 :-
My invention has reference to prior Letters Patent granted to Thomas Coltman
No 842 A.D. 1879 and No 1749 A.D. 1879 which inventions consisted in the
employment of apparatus (when one of the threads broke) for automatically
stopping the rotation of certain well known delivery rollers.
One part of the mechanism employed by Coltman and described in his specifica-
tions consisted of a key or driving pin marked B2 and of a ring-spring marked B¹
both fixed in a collar or boss and employed for the purpose of rotating certain
ratchet wheels, but when the said ratchet wheels are prevented from rotating by
mechanism employed for that purpose, the ring spring gives way and allows the
driving key to slip over certain inclines so as not to operate the ratchet wheels.
My invention has reference to the ring-spring which as at present constructed is
formed after the manner of a split ring-that is to say-it is a flat spring where
the meeting ends overlap each other.
These ring springs are placed in an annular groove formed in the boss, but as the
rings are in no way fixed in the annular groove, in practice it is found that they
gradually move around until their meeting ends come opposite to the driving pin,
in which case the said pin enters the overlapping ends of the ring and gradually
works itself in front thereof, consequently the spring is made of no avail and the
keys fail to do the work intended.
To obviate this the ring spring has been dispensed with, and a flat spring
attached to the key has been employed instead, but the springs did not give
satisfaction as they frequently broke causing the machine to be a failure.
My invention is intended to make a spring without any of the disadvantages
above named, and yet to be cheap in construction and certain in its action.
According to my invention I employ a ring spring but so made that the ends
thereof do not meet, consequently there is a greater elasticity in the spring than is
possible where the meeting ends overlap.
I also form one end of this spring with a pin or projection which is inserted in a
hole formed in the annular ring, by which means when it is once inserted and
fixed in its place, it cannot work around the groove as those at present in use.
Instead of having a pin on the ring and placing it in a hole to make it secure,
one end of the said ring may be revitted to the boss, or otherwise held to prevent
its working around.
By these means the key is allowed all necessary freedom, and there is no
liability for it to fail in its action.
Such being the nature and object of my Invention I will now proceed to describe
same more fully, and for that purpose make reference to the accompanying sheet of

page_text: drawings wherein Fig. 1 is section of certain well known parts of Coltman's
spinning frame which illustrates my invention, Figs 2 and 3 are plan views
necessary to illustrate my improvements.
As stated in the first part of this specification the ring spring as used and
patented by Coltman consisted of a ring with overlapping ends, but my improved
ring which does not overlap is shewn in Fig. 4. This ring B is made with a pin a
and is inserted in a hole made in the outer boss B on the bevil wheel A and fits
into an annular groove cut in the outer boss B as shewn in the drawings. The
driving pin B2 which is a flat steel pin fits into a slot or groove c cut lengthwise in
the boss B and it is forced and kept in the inclined position shewn in the
drawings by means of the round spring B¹.
When the machine is in going order the pin B2 is in contact with a projection b
on the flange of ratchet wheel C and driven thereby, but if the ratchet wheel is
held and prevented rotating by means of a clawker on the breakage of the yarn
then the pin B2 which has up to now been driving the ratchet wheel would yield
and revolve without turning the said ratchet wheel with it, but as soon as the
clawker is removed from the ratchet wheel and sets it at liberty the pin would
again catch hold of the projection b, and the boss driven thereby.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is;
In a Coltman's doubling and twisting machine I claim the peculiar form of
spring ring B' where the ends do not meet, for purposes and in manner substantially
as set forth.