Improvements in Stop Motions for Twisters or Doubling Machines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Stop Motions for Twisters or Doubling Machines.
JOHN MEEHAN, of 84, Tripp Street, Fall River, Bristol County, State of
Massachusetts, in the United States of America, Doubler, do hereby declare the
nature of this invention to be as follows;-
My invention relates to twisters or doubling machines for twisting yarn, and
its object is to stop the thread as soon as a strand breaks. In the operation of
twisting yarn from two or more strands, if one strand breaks, the yarn is
spoiled, and thread is wasted. Waste made at the twisters is both costly and
worthless, because it cannot be worked over again, but is only fit for cleaning
purposes.
Stop motions for twisters have been invented and used and have been found
most desirable, saving time and material.
My invention aims to improve upon previous devices, and provide a stop-motion
which will operate promptly upon the breaking of either the entire yarn or
any one or more of the strands, whether the break occurs between the spools
and the rolls, or between the rolls and the bobbins.
My invention consists in a combined guide and clamp through which the
strands run, a detent holding the guide-clamp in place, and a system of levers
and rocking drag-bar by which the detent is tripped and the guide-clamp is
allowed to nip the strands, whenever one or more of the strands breaks.
Below the spools and behind the sizing trough place a rigid beam running
lengthwise of the twister, parallel with the rolls and fastened to the end frames
of the twister. On this beam, are mounted the stop motions, only one of which
need be described, it being understood that there is one for each spindle.
At the back of the beam a gang of elbow leyers is fulcrumed. The levers corre-
spond in number to the strands of the yarn, the upright arm of each lever
having an open twisted eye at its end through which the strand passes. The
horizontal arms of the levers extend backwardly and by their weight exert a
constant tension on the strands, compensating for any slight irregularities in
the teed.
The guide-clamp is an upright bar sliding vertically in guides attached to
the beam. The upper end of the guide-clamp has a perforation, preferably a
diagonal slot, just above the upper edge of the beam. Through this slot run
all the strands. The lower part of the guide clamp has an abutment, such as
the upper end of a slot or hole to permit the guide-clamp to be engaged by a
suitable detent, and held thereby in its normal position. A weight or its equiva-
lent exerts a constant downward pull on the guide-clamp. The preferred form
of detent for the guide clamp is a bolt sliding in a transverse hole in the beam.

page_text: A spring keeps the bolt normally engaged with the guide-clamp.
In the rear end of the bolt is fulcrumed an arm, one end of which projects
forward under the beam to a point below the rolls, where an eye or hook encircles
the yarn. The other end of the arm is shorter, and extends rearwardly.
Suitably fulcrumed on the frame of the twister, are rock arms which carry a
connecting drag bar vibrating in the arc of a circle adjacent to the normal
position of the ends of the levers and arms.
When either a strand or the entire yarn breaks the levers or the arm or both
fall and cause the drag bar to trip the detent, thereby releasing the guide-clamp
and allowing it to fall and nip the yarn.
W. E. HEYS & SON,
Agents for the Applicant.
COMINI DI PUIFICATION.
Improvements in Stop Motions for Twisters or Doubling Machines.
I, JOHN MEEHAN, of 84, Tripp Street, Fall River, Bristol County, Massa-
chusetts, in the United States of America, Doubler, do hereby declare the nature
of this invention, and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
My invention relates to twisters or doubling machines for twisting yarn and
its object is to stop the thread as soon as a strand breaks. In the operation of
twisting yarn from two or more strands, if one strand breaks, the yarn is
spoiled and thread is wasted. Waste made at the twisters is both costly and
worthless, because it cannot be worked over again, but is only fit for cleaning
purposes.
'
Stop-motions for twisters have been invented and used and have been found
most desirable, saving time and material.
My invention aims to improve upon previous devices, and provides a stop-motion
which will operate promptly upon the breaking of either the entire yarn or
any one or more of the strands, whether the break occurs between the spools
and the rolls or between the rolls and the bobbins.
My invention consists in a combined guide and clamp through which the
strands run, a detent holding the guide-clamp in place, and a system of levers
and rocking drag-bar by which the detent is tripped and the guide-clamp is
allowed to nip the strands, whenever one or more of the strands break.
Below the spools and behind the sizing trough, I place a rigid beam running
lengthwise of the twister parallel with the rolls and fastened to the end frames
of the twister. On this beam, are mounted the stop motions, only one of which
need be described, it being understood that there is one for each spindle.
At the back of the beam a gang of elbow levers is fulcrumed. The levers corre-
spond in number to the strands of the yarn, the upright arm of each lever
having an open twisted eye at its end through which the strand passes. The
horizontal arms of the levers extend backwardly and by their weight exert a
constant tension on the strands, compensating for any slight irregularities in
the feel.
The guide-clamp is an upright bar sliding vertically in guides attached to
the beam. The upper end of the guide-clamp has a perforation, preferably a

page_text: diagonal slot, just above the upper edge of the beam. Through this slot run
all the threads. The lower part of the guide clamp has an abutment, such as
the upper end of the slot or hole to permit the guide clamp to be engaged by a
suitable detent, and held thereby in its normal position. A weight or its equiva-
lent exerts a constant downward pull on the guide-clamp. The preferred form
of detent for the guide-clamp is a bolt sliding in a transverse hole in the beam.
A spring keeps the bolt normally engaged with the guide-clamp.
In the rear end of the bolt is fulcrumed an arm, one end of which projects
forward under the beam to a point below the rolls, where an eye or hook encircles
the yarn. The other end of the arm is shorter and extends rearwardly.
Suitably fulcrumed on the frame of the twister are rock arms, which carry a
connecting drag arm vibrating in the arc of a circle adjacent to the normal
position of the ends of the levers and arms.
When either a stand or the entire yarn breaks, the levers or the arms or both
fall and cause the drag-bar to trip the detent thereby releasing the guide-clamp
and allowing it to fall and nip the yarn.
In the accompanying drawings,
Figure 1 is a plan view of one of my stop-motions.
Figure 2 is a sectional elevation with the parts in working order.
Figure 3 shows the operation of the device when the entire yarn breaks.
Figure 4 shows the operation when a strand breaks.
Figure 5 is a sectional end elevation of a twister, showing the location of my
stop-motion.
Figure 6 is an enlarged view of the guide-clamp.
Below the spools A and behind the sizing trough B, I place a rigid beam C,
running lengthwise of the twister, parallel with the rolls D, and fastened to the
end frames of the twister. On this beam are mounted the stop-motions, only one
of which need be described, it being understood that there is one for each
spindle E.
At the back of the beam C a gang of elbow levers is fulcrumed, preferably
on a bracket G, secured to the upper part of the beam. The levers correspond
in number to the strands, h, ha, ha, of the yarn H, the upright arm of each lever
having an open twisted eye f at its end, through which the strand passes. The
tension on the strands keeps the upright arms f against the horizontal stop-
rod I, mounted in brackets i on the beam C. The horizontal arms f2 of the
levers extend backwardly from the beam. C and by their weight exert a constant
tension on the strands, compensating for any slight irregularities in the feed.
The guide-clamp K is an upright bar sliding vertically in guides k, attached
to the front of the beam C. The upper end of the guide-clamp has a perforation,
preferably a diagonal slot ¹, just above the upper edge of the beam C. Through
this slot run all the threads h, h, h. The top of the guide-clamp is preferably
hooked, as shown at . The lower part of the guide-clamp has an abutment,
such as the upper end of a slot or hole ³, to permit the guide clamp to be engaged
by a suitable detent and held thereby in its normal position. A weight K₁ or its
equivalent exerts a constant downward pull on the guide-clamp. The preferred
form of detent for the guide-clamp is a bolt L, sliding in a transverse hole in
the beam C.
A spring M, preferably seated between a collar on the bolt L and a bracket N,
supporting the rear end of the bolt, keeps the bolt normally engaged with the
guide-clamp. In the rear end of the bolt is fulcrumed a lever Ŏ, preferably
bent twice at right angles, as shown, in order to permit one end to project
forward under the beam C to a point below the rolls D where an eye or hook o
encircles the yarn H. The other arm of the lever 0 is shorter and extends rear-
wardly, having fulcrumed to it a hook P. which has a bent arm p rising above
the lever and carrying a cross-bar pl. A pin p², catching under the lever 0,
maintains the hook in its normal position.
Suitably fulcrumed on the frame of the twister are rock-arms R, which carry

page_text: ".
a connecting drag-bar r, vibrating in the arc of a circle adjacent to the normal
position of the hook P. The rock arms are actuated preferably by an excentric S,
keyed on the shaft of one of the rollers D and connected with the rock-arm
by a 1od T.
The operation of my device is as follows: The separate strands of thread
are passed through the eyes f and the perforation k¹, then under the glass rod b
in the sizing trough, and then around the rollers, through the hook or eye_o,
to the bobbin on the spindle E. If an entire yarn breaks, the lever O falls,
raising the hook P into the path of the drag-bar r, which catches the hook and
pulls it and the lever O and the bolt L backward, thus releasing the guide-clamp
and allowing it to drop and nip the strands at the edge of the beam C. The
hooked end of the guide clamp shuts down over the guide k and assists in holding
the strands. Should the lever O fail to fall when the yarn breaks back of the
rollers, the elbow-levers F will fall, striking the cross-bar pl and tilting up
the hook into the path of the drag-bar. If only one strand breaks, its lever
will similarly cause the tripping of the detent and the dropping of the guide-
clamp.
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;
1. A stop motion for twisters, or doubling machines consisting of a guide-
clamp, means for causing said guide-clamps to move when unrestrained to nip
the yarn, a detent for said guide-clamp movable transversely to the line of
movement of said clamp, and tripping mechanism for the detent, comprising a
rocking drag-bar, and a hook pivotally connected with the detent and adapted
to be engaged by said drag-bar, and when so engaged to move the detent afore-
said and thereby disengage it from the guide clamp, constructed and arranged
substantially as hereinbefore described and as illustrated by the accompanying
drawings.
2. A stop motion for twisters or doubling machines, consisting of a guide-
clamp, means for actuating the same, a detent for said guide-clamp movable
transversely to the line of movement of said clamp, a hook pivotally connected
with the detent, a rocking drag-bar to engage with the hook, and one or more
levers controlled by the yarn and adapted to tilt the hook in the path of the
drag-bar, whereby the detent will be disengaged from the clamp, all constructed
and arranged substantially as herein before described and as illustrated by the
accompanying drawings.
3. A stop motion for twisters or doubling machines, consisting of a guide-
clamp, means for actuating the same, a detent for said guide clamp, a hook con-
nected with the detent, a rocking drag-bar to engage with the hook, a gang of
levers one for each strand, and a single lever for the entire yarn, all of said
levers controlling the relative positions of the hook and the drag-bar all con-
structed and arranged substantially as herein before described and as illustrated
by the accompanying drawings.
4. A stop motion for twisters or doubling machines, consisting of a guide-
clamp, means for actuating the same a detent-bolt for said guide clamp movable
transversely to the line of movement of said clamp, a lever fulcrumed in the
head of said bolt, and engaging with the yarn, a hook carried by said lever,
and a rocking drag-bar to engage said hook and when so engaged to move the
detent as aforesaid and thereby disengage it from the guide-clamp, all constructed
and arranged substantially as herein before described and as illustrated by the
accompanying drawings.
5. A stop-motion for twisters or doubling machines, consisting of a guide-
clamp, means for actuating the same, a detent bolt for said guide-clamp, a lever
fulcrumed in the head of said bolt and engaging with the yarn below the rolls
of the twister, a hook hinged to said lever and having an upright arm, elbow-

page_text: levers having eyes for the strands and adapted to drop on the upright arm of
the hook, and a rocking drag-bar to engage with said hook, constructed and
arranged substantially as herein described and as illustrated by the accompanying
drawings.