Improvements in or connected with Stop Motions Employed in Doubling Machinery and the like.
Year: 1896

page_text: Date of Application. 23rd Jan., 1896
Complete Specification Left, 21st Oct., 1896-Accepted, 21st Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in or connected with Stop Motions Employed in
Doubling Machinery and the like.
I, LAW HARGREAVES, of Beaumont Street, Huddersfield, in the County of
York, Machine Maker, do hereby declare the nature of this invention, to be as
follows:-
The object of my invention, is to construct apparatus whereby the spindles
employed in doubling and like machines, are brought to a standstill should a yarn
or yarns break prior to their becoming twisted together; and the apparatus
hereinafter described, is of more simple and efficient construction than apparatus
hitherto employed for the same purpose.
According to my invention, I mount the upper drawing roller in a rocking frame,
which is fulerumed in the frame of the machine, and on the lower part of the said
rucking frame an arm is provided which is connected with a rod which communi-
cates with suitable stop mechanism, situated near the belt of the spindle. On the
arm of the rocking frame a projection is provided, which, when supported on its
lower side, holds the frame in such a position, that the upper drawing roller is kept
in contact with the lower roller, and the rod which is in connection with the stop
motion of the spindle belt, holds the said stop motion out of action thus allowing
the belt to rotate the spindle freely. A weighted arm is jointed to the frame, and
a tooth or notch situated on the said weighted arm takes under the projection
situated on the arm of the rocking frame, so as to support same in the manner
above described; and a needle bar situated on the said arm, is provided with drop
needles, which latter pass through suitable slots in the needle bar and are kept up
by the tension of the yarns passing through their eyelets to the drawing rollers.
A rocking shaft is mounted horizontally in the machine, and suitable projecting
cams or lugs are mounted on the said shaft so as to pass immediately below and
adjacent to the ends of the drop needles during the rocking motion of the shaft.
As the drawing rollers revolve, the yarns passing through the eyelets of the
needles keep the said needles in the upward position, thus allowing the projecting
cam to pass freely below same; but in the event of a yarn breaking, the projecting
cam comes in contact with the needle which has fallen owing to the slackening of
the thread, thus causing the weighted arm to be moved back and withdrawing the
support of the tooth from the projection on the arm of the rocking frame, which
latter rocking on its axis lifts the upper drawing roller and actuates the stop
mechanism of the spindle belt, bringing the spindle to a standstill immediately.
For the purpose of stopping the spindle in the event of the twisted thread
breaking, I employ a feeler, which during the time the thread is intact, supports a
crooked needle in the needle bar, but in the event of the twisted thread breaking,
the feeler falling lowers the crooked needle which intercepts the projecting cam,
and thus causes the stop motion to be actuated as above described.
Referring to the stop motion of the spindle belt, I mount the tension pulley on
the end of an arm which is fulcruined to a bracket attached to the frame. The
opposite end of the arm carries a friction piece and a similar friction piece is
formed on the extremity of the bracket, and the friction pieces and pulley are
preferably situated on the left hand side of the bracket and the arm.
In this
.i

page_text: manner, I am enabled to clamp the spindle belt direct without the intervention of
auxiliary arms or levers.
Dated this 23rd day of January 1896
BREWER & SON,
London and Leeds, Agents for the Applicant.
Improvements in or connected with Stop Motions Employed in.
Doubling Machinery and the like.
I, LAW HARGREAVES, of Beaumont Street, Huddersfield, in the County of
York, Machine Maker, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The object of my invention, is to construct apparatus whereby the spindles
employed in doubling and like machines, are brought to a standstill should a yarn
or yarns break; and the apparatus hereinafter described, is of more simple and
efficient construction than apparatus hitherto employed for the same purpose.
In order that my invention may be clearly understood, I will proceed to describe
same with reference to the accompanying drawings, in which similar letters refer
to like parts in both the figures.
Figure 1 is a sectional side view of so much of a doubling machine as is required
to illustrate my invention, the parts of the said machine being shewn in the position
they occupy when the yarns are intact, and Figure 2 shews a similar view of the
same apparatus with the parts of the machine in the position they occupy when a
yarn becomes broken.
A is the lower drawing roller, and A' is the upper drawing roller, which latter
is mounted in a rocking frame B, and the said rocking frame B is fulcrumed at C
on a bracket C', which is mounted on the main frame D of the machine. E is a
rod which connects the lower end of the rocking frame B with an arm F which is
fulcrumed on a bracket G attached to the frame D. H is a weighted arm which
is fulcrumed to the frame C¹ on the pin J, and K is a tooth situated on the lower
portion of the said weighted arni H, which tooth K engages with a projection L
formed on the lower end of the rocking frame B. M is a needle bar carried on
the arm H, and drop needles N are mounted in slots in the said needle bar M and
are free to slide vertically therein. P is a rocking shaft carrying cams or lugs R
on same, and the rocking of the shaft P is such as to move the cams R backwards
and forwards below the needle bar M. b is a projection situated on the rocking
frame B, and is a notch in the weighted arm H. S is a feeler which is fulcrumed
to a bracket S¹ attached to the frame D, and the end of the feeler S supports a
crooked needle s which works in the needle bar M. g is a friction piece which
projects at right angles from the bracket G, and f is a friction piece which projects
at right angles from the arm F. T is a tension pulley which is carried on the
arm F, and the friction pieces g and f, and the pulley T, are all preferably situated
on one and the same side of the bracket G and arm F. V is a single yarn which
passes round the roller A¹ where it is twisted with other yarns and then passes by
way of a guide on the feeler S to the spindle, and W is the spindle belt which
transmits motion to the spindle from the cylinder.
As the drawing rollers revolve, the yarns passing through the eyelets of the
Deedles N keep the said needles in the upward position, thus allowing the projecting
cam R to pass freely below same; but in the event of a yarn breaking, the cam R
comes in contact with the needle N, which has fallen owing to the slackening of
the thread, thus causing the weighted arm H to be moved back and withdrawing
the support of the tooth K from the projection L. The rocking frame B is thus

page_text: liberated, so the rod E which supports the arm F immediately pulls it down, and
this action has the effect of raising the upper roller A¹ from the lower roller A,.
whilst at the same time the tension pulley T is dropped and the friction
pieces ƒ and g are brought against the belt W, which latter is thus slackened and
simultaneously gripped, bringing the spindle to a standstill immediately. When
the rocking frame B is rocked as above described, the projection 6 moves down the
side of the notch h, thus holding the arm H in the out position while the spindle is.
at rest, and preventing the cam R from continually hitting the dropped needle.
Should the twisted thread break after it has passed the rollers A A', the
feeler S which is kept in position by the tension of the said twisted thread, turns
on its fulcrum and withdraws its support from the needle s, which latter falling in
the needle bar M, intercepts the cam R and produces the movements above,
described, which result in the releasing of the threads and in the stopping of the
spindle.
Having now particularly described and ascertained the nature of my said inven--
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In stop motions for doubling machinery and the like, the rocking frame B.
having a projection L on same, in combination with the weighted arm H having a
tooth K on same, substantially as and for the purposes set forth.
2. In stop motions for doubling machinery and the like, the combination of the
rocking frame B, weighted arm H carrying needles N, rocking shaft P carrying
a cam R, substantially as and for the purposes set forth.
3. In stop motions for doubling machinery and the like, the combination of the-
rocking frame B carrying the roller A' and having projections 6 and L on same,.
the weighted arm H carrying needles N and s, the feeler S, and the rocking
shaft P carrying cam R, substantially as and for the purposes set forth.
4. In stop motions for doubling machinery and the like, the arm F carrying.
tension pulley T and having a friction piece f on same, the said arm F being
fulcrumed to the bracket G which carries on its end a friction piece g, all working
substantially as described and for the purposes set forth.
5. In stop motions for doubling machinery and the like, the rocking frame B.
and parts connected therewith, in combination with the arm F and parts connected.
therewith, all working substantially as and for the purposes set forth.
Dated this 21st day of Oc or AX
BREWER & SON,
London and Leeds, Agents for the Applicant.