Improvements in Machinery Employed in Twisting or Doubling Yarns of Wool and other Fibre
Year: 1888

page_text: Date of Application, 14th Mar., 1888
Complete Specification Lelt, 14th Dec., 1888-Accepted, 5th Feb., 1889
PROVISIONAL SPECIFICATION.
Improvements in Machinery Employed in Twisting or Doubling
Yarns of Wool and other Fibre.
1, JOSEPH FARRAR, of Globe Works, Halifax, in the County of York, Machine
Maker, do hereby declare the nature of this invention to be as follows:-
The first part of my invention has reference to that class of twisting frame to which
self-acting stop motions are applied, employed to stop the spindle and roller on the
breakage of a thread, and my improvements consist in combining therewith a new
form of apparatus, which, on being actuated by such said stop motion, arrests the
rotation of the spindle without the aid of the attendant, leaving both her hands at
liberty to piece up the broken ends.
Hitherto, in connection with stop motion frames, there has been no effective
device for temporarily stopping the spindle while the attendant pieces up broken
ends. In some devices there has been great wear and tear of the driving bands
while considerable power is required to drive the spindle and in other cases the
devices have been altogether unreliable. To make stop motions in this class of
machine more effective I propose to employ tension pulleys and driving tapes or
bands arranged to drive two or more spindles, the whole being arranged to auto-
matically stop the rotation of a spindle in twisting and doubling machines when a
thread breaks.
In carrying out my invention I make use of the ordinary apparatus employed to
stop the supply of yarn on the breakage thereof, so that when a thread breaks a rod
in connection with the stop motion descends in doing which an idle pulley is, by means
of bell-crank or other form of lovers, forced against the driving tape or band in such
a manner that the said driving tape or band is removed out of contact with the wharle
on the spindle, consequently the tape ceases to drive the said wharle, such tape for
the time being passing around the idle pulley so as not to impede the tape or band
from driving the other spindle or spindles at full speed. As, however, the wharle
would continue to revolve by the momentum it had received, I employ a suitable form
of brake, which is forced against the wharle, at the same time as the idle pulley
Pains 71

page_text: places the tape or band out of contact with the said wharle, by which means, when a
thread breaks, the stop motion not only causes the feed rollers to discontinue feeding
the yarn, but it also removes the tape from the wharle, and applies the brake, thereby
immediately stopping the rotation of the spindle and feed roller, leaving the attendant
at liberty to piece up the broken ends, which, when done, the stop motion is reinstated
to its original position, and the idle pulley and brake removed to allow the tape to
recommence to drive the wharle and spindle.
Instead of the idle pulley and brake being applied by the dropping of any
mechanism, it may he effected by the ascending of any mechanism.
The second part of my invention has reference to trap twisting frames, and
consists in the employment of means for preventing "hard twist," which is liable
to be made in this class of frame every time the frame is started after being stopped,
and this arises in consequence of the slackness of the yarn between the bobbin and the
feed rollers, the apparatus I employ being designed to take up the slack before the
trap lever is at liberty to engage with the trap roller. In this class of machine it
is customary to move the driving strap from the loose to the fast pulley by means of
a hand wheel and screw, which on being operated moves the strap from one pulley to
the other, both to start and stop the frame.
My improvements consist in combining with such screw and hand wheel, the
ordinary horizontal rods placed lengthwise of the machine. These horizontal rods
slide upon inclines and are employed to carry one end of the trap-levers so as to
keep them clear or otherwise from the trap-rollers. In combination with such parts,
I also employ a segment or equivalent device carried on a short cross shaft eccentrically
connected with the sliding rods, so that when the screw is operated to move the strap-
fork from the loose to the fast pulley, for starting the frame, the slack yarn is taken
up by the first few revolutions of the machine but on the continued rotation of the
screw a catch is released from the segment causing the horizontal rods to slide down
certain inclines allowing the trap levers to occupy a position to act on the trap rollers
when a thread breaks. In stopping the frame the screw is operated the reverse
direction, moving the strap from the fast to the loose pulley, while at the same time
a chain or equivalent device draws the segment into its former position causing the
horizontal rods to ascend the inclines for the purpose of lifting all the trap levers and
Keeping them clear of the trap rollers which are held there until the machine is started
again as already described.
By combining with the strap shifting mechanism the apparatus herein described,
the slack yarn is always taken up before the rods have released their hold of the
trap levers, consequently, the "hard twist" complained of will be avoided.
Instead of employing a catch as above described for catching with the segment, a
suitable form of spring may be employed to hold the segment in position.
If the horizontal rods failed to descend the inclines, when required, they may be
assisted by a spring, weight or other means.
Dated this 13th day of March 1888

page_text: improvements in Machinery Employed in Twisting or Doubling
Yarns of Wool and other Fibre.
I, JOSEPH FARRAR, of Globe Works, Halifax, 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 first part of my invention has reference to that class of twisting frame to which
self acting stop motions are applied, employed to stop the spindle and roller on the
breakage of a thread, and my improvements consist in combining therewith a new
form of apparatus, which on being actuated by such said stop motion, arrests the
rotation of the spindle without the aid of the attendant, leaving both her hands at
liberty to piece up the broken ends.
Hitherto, in connection with stop motion frames, there has been no effective device
for temporarily stopping the spindle, while the attendant pieced up broken ends.
In some devices there has been great wear and tear of the driving bands, while
considerable power is required to drive the spindle, and in other cases the devices
have been altogether unreliable. To make stop motions in this class of machine more
effective, I propose to employ tension pulleys and driving tapes or bands arranged to
drive two or more spindles, the whole being arranged to automatically stop the
rotation of a spindle in twisting and doubling machines when a thread breaks.
In order that this part of my invention may be clearly understood, I herein make
reference to the accompanying sheet of drawings wherein Fig. 1 illustrates so much
of a twisting frame as is necessary to shew the application of my invention thereto,
and Fig. 2 is plan view of same. Fig. 3 is an enlarged view of the same parts as
Fig. 1, whilst Fig. 4 is plan of Fig. 3.
A is the framework of the machine, B the roller driven by bevel wheels C, and D
the spindle carrying a bobbin E driven by means of tape or band F from the tin
cylinder G, all arranged in the ordinary manner. The drawings represent the twisting
frame on the ring and traveller system H, but a flyer or other devices
may be employed
instead. The stop motion mechanism is illustrated at. I and is composed of a porforated
grate, hinged on a fulcrum a carrying a series of eyelets b, one eylet for each thread,
therefore when the threads are intact the eyelets are supported thereby, keeping the
lower end clear of a continuously revolving wiper shaft J. During this time the
point of the finger or rod c carried by the bell crank lever K hinged upon a fulcrum
at L and weighted at M. If, therefore, one of the threads break, the eyelet drops,
coming into contact with the revolving wiper J which strikes the lower end of the
eyelets, causing the framework I to be oscillated on its fulcrum a, consequently the
point of the rod e descends, as shewn in Fig. 5, the upper end d of bell crank lever K
lifting the roller out of contact with the bevel wheel C, whereupon the delivery of
yarn ceases, The parts, however, just described, are of ordinary construction and

page_text: form no part of my invention, but to the lower end of the bell crank lever K
I connect a bar N arranged horizontally, the front end of which is connected by pin
or other means to a plate O working upon the spindle or upon a collar surrounding
the spindle, such plate O carrying an idle pulley P, therefore when the yarn breaks
and the stop motion mechanismi assumes the position shewn in Fig. 5 the horizontal
bar N is pushed forward as shewn in plan views Figs. 2 and 4, the effect of which
is to throw the idle pulley outwards for the purpose of removing the tape F from
contact with the wharle e, so that the spindle will be no longer driven. As, however,
the wharle would continue to revolve by the momentum it has received, I place on
the bar Na brake R, which, when the stop motion mechanism is operated, such brake
is forced against the wharle D, and this operation is performed at the same time as
the idle pulley removes the tape or band from contact with the wharle, by which
means, when a thread breaks, the stop motion not only causes the feed rollers to
discontinue feeding the yarn, but it also removes the tape or band from the wharle,
and simultaneously therewith applies the break, whereby the rotation of tho spindle
is immediately arrested, all of which operations are automatic in their action, requiring
no assistance from the operative, consequently he or she is at liberty to piece up the
broken ends, which when done, the parts of the stop motion are reinstated to their
original position, the idle pulley and break removed back, allowing the tape or band
to recommence to drive the wharle and spindle. Instead of the idle pulley and
brake being applied by the dropping of the rod c, the various parts of the mechanism
may be operated by the ascending of suitable mechanism.
The second part of my invention has reference to trap twisting frames, and consists
in the employment of means for preventing "hard twist," which is liable to be made
in this class of frame every time it is started after being stopped, and this arises in
consequence of the slackness of the yarn between the bobbin and the feed rollers; the
apparatus employ being designed to tako up the slack before the trap lever is at
liberty to engage with the trap roller. In this class of machine it is customary to
move the driving strap from the loose to the fast pulley by means of a hand wheel and
screw, which on being operated moves the strap from one pulley to the other, both to
start and stop the frame.
My improvements consist in combining with such screw and hand wheel, the ordinary
horizontal bars or rods placed lengthwise of the machine. These horizontal bars or
rods are made with inclines and are employed to support one end of the trap levers so
as to keep them clear from the trap roller mechanism. In combination with such
parts, I propose to employ a segment or equivalent device carried on a short cross
shaft, centred eccentrically with the sliding rods, so that when the screw is operated
to move the strap fork from the loose to the fast pulley, for starting the frame, the
slack yarn is taken up by the first few revolutions of the machine, but on the
continued rotation of the screw, a catch is released from the segment, causing
the horizontal rods to slide down certain inclines, allowing the trap levers to occupy a
position to act on the trap rollers when a thread, breaks.
This part of my invention is shewn on sheet 2, where Fig. 6 is sectional elevation
showing the parts in the positions they assume when the machine is in working order
and the strap on the fast pulley. Fig. 7 is section through line 1-2 of Fig. 6, and
Fig. 8 is section through 1-2, but in this case the parts are shewn in the positions
they assume when the strap is on the loose pulley. A is the framework of the
machine, the trap roller driven by bevel wheels C as described in the first part of
this Specification. D is the ordinary trap lever hinged at a, the front end of which is
forked for acting on certain catches when the thread breaks or is used up, such
forked end being kept clear of the catches by ineans of the yarn passing through an
eyelet c in the end of the trap lever, but if the thread break and the tension thereof
be removed from the eyelet, the forked end would drop and arrest the further rotation
of the trap roller; but these parts form no part of my invention, and I make no
claim to them. E is a rod placed horizontally and is arranged in connection with the
strap fork for sliding the strap from the fast to the loose pulley. This rod E is made
secure in the clamp F, which is formed with screw threads and fits onto the screw G

page_text: operated by hand wheel H which causes the rod E to move end wise. When the frame
is stopped the yarn slackens, consequently the forked end of the trap levers drop, and
would be ready to be caught hold of by the catches & whenever the frame was set in
motion, but to prevent this the horizontal bar I is employed, and is arranged to be
raised or elevated as shewn in Fig. 8 for the purpose of supporting the forked ends of
the trap levers during the time the frame is not at work, and in order that the slack
may be taken up before the horizontal rod is lowered from under the forked ends of
the trap levers I form an incline d, and I employ a segmented lever J working upon
a short shaft K. The end of the horizontal bar I is bent and connected to the bottom
end of the segmented lever J so that as the segment is made to oscillate the bar I will
slide horizontally. The movement in one direction causes the bar to be elevated as
shewn at Fig. 8, and when elevated, supports the trap levers, but the opposite move-
ment causes the bar to descend, ceasing to support the trap levers, the tension of the
yarn in the eyelet being now sufficient for that purpose, therefore when the frame is
not at work with the strap on the loose pulley, the parts occupy the positions shewn in
Fig. 8, but when it is necessary to start the frame the hand wheel II is made to rotate,
causing the screw G to draw the rod E in the direction of the arrow m, and when the
strap has got nicely onto the fast pulley the machine is made to revolve, taking up the
slack yarn, whilst the trap levers are supported by the bar I, but the mechanisin is so
timed that after the spindles have made two or three revolutions, the action of the
screw G will, bring the catch e (carried by the clamp F, fixed to rod E, see Fig. 9)
under the end of the hinged paw! L, as shewn in Fig. 7, which catch will lift the
pawl L from a sneck made in the top of the segment J, whereupon a spring or weight,
not shewn in the drawings, may be used to cause the bar I to move in the direction of
the arrow, whereby the incline d formed underneath such bar will slide down the
part the upper surface of which will then cease to support the trap levers, but the
slack of the yarn having been taken up, the tension will be sufficient to keep the forked
end of the trap lovers clear of the catches until a thread breaks, when the levers will
fall and act in the ordinary manner. When the frame must be stopped the hand
wheel His made to revolve in the opposite direction, bringing the segment J back by
the rod E, pulling the chain M, the catch e will be removed from underneath the
pawl Lallowing it to drop onto the segment upon which it rides until the sneck in the
segment is presented to the pawl, when the segment and bar I will be held in position
until the frame is again started.
By combining with the strap shifting mechanism the sliding bar I and segment 1,
the slack yarn is always taken up before the bars have released their hold of the trap
levers D, consequently the hard twist which is now made will be avoided.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declaro that what I
claim is:-
Firstly. In twisting frames having stop motions, the combination therewith of
an idle pulley and brake for stopping the rotation of the spindle on the breakage of
the yarn, the whole being operated in manner substantially as described.
Secondly. In trap twisting frames, the employment of the segment for coupling
the strap shifting mechanism with the sliding bar I for purposes and in the manner
substantially as herein shown and described.
Dated this 13th day of December 1888.
TASKER & CROSSLEY,
Halifax, Agents.

page_text: Date of Application, 14th Mar., 1888
Complete Specification Left, 14th Dec., 1888
Complete Specification Accepted, 5th Feb., 1889
Improvements in Machinery Employed in
Yarns of Wool and other Fibre.
1, JOSEPH FARRAR, of Globe Works, Halifax, in the County of York, Machine
Maker, do hereby declare the nature of this invention to be as follows:-
The first part of my invention has reference to that class of twisting frame to which
self-acting stop motions are applied, employed to stop the spindle and roller on the
breakage of a thread, and my improvements consist in combining therewith a new
form of apparatus, which, on being actuated by such said stop motion, arrests the
rotation of the spindle without the aid of the attendant, leaving both her hands at
liberty to piece up the broken ends.
Hitherto, in connection with stop motion frames, there has been no effective
device for temporarily stopping the spindle while the attendant pieces up broken
ends. In some devices there has been great wear and tear of the driving bands
while considerable power is required to drive the spindle and in other cases the
devices have been altogether unreliable. To make stop motions in this class of
machine more effective I propose to employ tension pulleys and driving tapes or
bands arranged to drive two or more spindles, the whole being arranged to auto-
matically stop the rotation of a spindle in twisting and doubling machines when a
thread breaks.
In carrying out my invention I make use of the ordinary apparatus employed to
stop the supply of yarn on the breakage thereof, so that when a thread breaks a rod
in connection with the stop motion descends in doing which an idle pulley is, by means
of bell-crank or other form of levers, forced against the driving tape or band in such
a manner that the said driving tape or band is removed out of contact with the wharle
on the spindle, consequently the tape ceases to drive the said wharle, such tape for
the time being passing around the idle pulley so as not to impede the tape or band
from driving the other spindle or spindles at full speed. As, however, the wharle
would continue to revolve by the momentum it had received, I employ a suitable form
of brake, which is forced against the wharle, at the same time as the idle pulley

page_text: places the tape or band out of contact with the said wharle, by which means, when a
thread breaks, the stop motion not only causes the feed rollers to discontinue feeding
the yarn, but it also removes the tape from the wharle, and applies the brake, thereby
immediately stopping the rotation of the spindle and feed roller, leaving the attendant
at liberty to piece up the broken ends, which, when done, the stop motion is reinstated
to its original position, and the idle pulloy and brako removed to allow the tape to
recommence to drive the wharle and spindle.
Instead of the idle pulley and brake being applied by the dropping of any
.mechanism, it may be effected by the ascending of any mechanism.
The second part of my invention has reference to trap twisting frames, and
consists in the employment of means for preventing "hard twist," which is liable
to be made in this class of frame every time the frame is started after being stopped,
and this arises in consequence of the slackness of the yarn between the bobbin and the
feed rollers, the apparatus I employ, being designed to take up the slack before the
trap lever is at liberty to engage with the trap roller. In this class of machine it
is customary to move the driving strap from the loose to the fast pulley by means of
a hand wheel and screw, which on being operated moves the strap from one pulley to
the other, both to start and stop the frame.
My improvements consist in combining with such screw and hand wheel, the
ordinary horizontal rods placed lengthwise of the machine. These horizontal rods
slide upon inclines and are employed to carry one end of the trap-levers so as to
keep them clear or otherwise from the trap-rollers. In combination with such parts,
I also employ a segment or equivalent devico carried on a short cross shaft eccentrically
connected with the sliding rods, so that when the screw is operated to move the strap-
fork from the loose to the last pulley, for, starting the frame, the slack yarn is taken
up by the first few revolutions of the machine but on the continued rotation of the
screw a catch is released from the segment causing the horizontal rods to slide down
certain inclines allowing the trap levers to occupy a position to act on the trap rollers
when a thread breaks. In stopping the frame the screw is operated in the reverse
direction, moving the strap from the fast to the loose pulley, while at the same time
a chain or equivalent device draws the segment into its former position causing the
horizontal rods to ascend the inclines for the purpose of lifting all the trap levers and
keeping them clear of the trap rollers which are lield there until the machine is started
again as already described.
By combining with the strap shifting mechanism the apparatus herein described,
the slack yarn is always taken up before the rods have released their hold of the
trap levers, consequently, the "hard twist" complained of will be avoided.
Instead of employing a catch as above described for catching with the segment, a
suitable form of spring may be employed to hold the segment in position.
If the horizontal rods failed to descend the inclines, when required, they may be
assisted by a spring, weight or other means.

page_text: Improvements in Machinery Employed in Twisting or Doubling
Yarns of Wool and other Fibre.
I, JOSEPHI FARRAR, of Globe Works, Halifax, 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 first part of my invention has reference to that class of twisting frame to which
self acting stop motions are applied, employed to stop the spindle and roller on the
breakage of a thread, and my improvements consist in combining therewith a new
form of apparatus, which on being actuated by such said stop motion, arrests the
rotation of the spindle without the aid of the attendant, leaving both her hands at.
liberty to piece up the broken ends.
Hitherto, in connection with stop motion frames, there has been no effective device
for temporarily stopping the spindle, while the attendant pieced up broken ends.
In some devices there has been great wear and tear of the driving bands, while
considerable power is required to drive the spindle, and in other cases the devices
have been altogether unreliable. To make stop motions in this class of machine more
effective, I propose to employ tension pulleys and driving tapes or bands arranged to
drive two or more spindles, the whole being arranged to automatically stop the
rotation of a spindle in twisting and doubling machines when a thread breaks.
In order that this part of my invention may be clearly understood, I herein make
reference to the accompanying sheet of drawings wherein Fig. 1 illustrates so much
of a twisting frame as is necessary to shew the application of my invention thereto,
and Fig. 2 is plan view of same. Fig. 3 is an enlarged view of the same parts as
Fig. 1, whilst Fig. 4 is plan of Fig. 3.
A is the framework of the machine, B the roller driven by bevel wheels C, and D
the spindle carrying a bobbin E driven by means of tape or band F from the tin
The drawings represent the twisting
cylinder G, all arranged in the ordinary manner.
frame on the ring and traveller system H, but a flyer or other devices may be employed
instead. The stop motion mechanism is illustrated at I and is composed of a perforated
grate, binged on a fulcrum a carrying a series of eyelets b, one eylet for each thread,
therefore when the threads are intact the eyelets are supported thereby, keeping the
lower end clear of a continuously revolving wiper shaft J. During this time the
point of the finger or rod c carried by the bell crank lever K hinged upon a fulcrum
at Land weighted at M. If, therefore, one of the threads break, the eyelet & drops,
coming into contact with the revolving wiper J which strikes the lower end of the
eyelets, causing the framework I to be oscillated on its fulcrum a, consequently the
point of the rod e descends, as shewn in Fig. 5, the upper end d of bell crank lever K
lifting the roller out of contact with the bevel wheel C, whereupon the delivery of
yarn ceases. The parts, however, just described, are of ordinary construction and

page_text: form no part of my invention, but to the lower end of the bell crank lever K
I connect a bar N arranged horizontally, the front end of 'which is connected by pin
or other means to a plate O working upon the spindle or upon a collar surrounding
the spindle, such plate O carrying an idle pulley P, therefore when the yarn breaks
-and-the stop motion mechanism assumes the position shown in Fig. 5 the horizontal
bar N is pushed forward as shewn in plan views Figs. 2 and 4, the effect of which
is to throw the idle pulley outwards for the purpose of removing the tapo F from
contact with the wharle e, so that the spindle will be no longer driven. As, however,
the wharle would continue to revolve by the momentum it has received, I place on
the bar Na brake R, which, when the stop motion mechanism is operated, such brake
is forced against the wharle D, and this operation is performed at the same time as
the idle pulley removes the tape or band from contact with the wharle, by which
means, when a thread breaks, the stop motion not only causes the feed rollers to
discontinue feeding the yarn, but it also removes the tape or band from the wharle,
and simultaneously therewith applies the brake, whereby the rotation of the spindle
is immediately arrested, all of which operations are automatic in their action, requiring
no assistance from the operative, consequently he or she is at liberty to piece up the
broken ends, which when done, the parts of the stop motion are reinstated to their
original position, the idle pulley and brake removed-back, allowing the tape or band
to recommence to drive the wharle and spindle. Instead of the idle pulley and
brake being applied by the dropping of the rod c, the various parts of the mechanism
may be operated by the ascending of suitable mechanism.
The second part of my invention has reference to trap twisting frames, and consists
in the employment of means for preventing "hard twist," which is liable to be made
in this class of frame every time it is started after being stopped, and this arises in
consequence of the slackness of the yarn between the bobbin and the feed rollers; the
apparatus I employ being designed to take up the slack before the trap lever is at
liberty to engage with the trap roller. In this class of machine it is customary to
move the driving strap from the loose to the fast pulley by means of a hand wheel and
screw, which on being operated moves the strap from one pulley to the other, both to
start and stop the frame.
My improvements consist in combining with such screw and hand wheel, the ordinary
horizontal bars or rods placed lengthwise of the machine. These horizontal bars or
rods are made with inclines and are employed to support one end of the trap levers so
as to keep them clear from the trap roller mechanism. In combination with such
parts, I propose to employ a segment or equivalent device carried on a short cross
shaft, centred eccentrically with the sliding rods, so that when the screw is operated
to move the strap fork from the loose to the fast pulley, for starting the frame, the
slack yarn is taken up by the first few revolutions of the machine, but on the
continued rotation of the screw, a catch is released from the segment, causing
the horizontal rods to slide down certain inclines, allowing the trap levers to occupy a
position to act on the trap rollers when a thread breaks.
This part of my invention is shewn on sheet 2, where Fig. 6 is sectional elevation
shewing the parts in the positions they assume when the machine is in working order
and the strap on the fast pulley. Fig. 7 is section through line 1-2 of Fig. 6, and
Fig. 8 is section through 1-2, but in this case the parts are shewn in the positions
they assume when the strap is on the loose pulley. A is the framework of the
machine, B the trap roller driven by bevel wheels C as described in the first part of
this Specification. D is the ordinary trap lever hinged at a, the front end of which is
forked for acting on certain catches b when the thread breaks or is used up, such
forked end being kept clear of the catches by means of the yarn passing through an
eyelet c in the end of the trap lever, but if the thread break and the tension thereof
be removed from the eyelet, the forked end would drop and arrest the further rotation
of the trap roller; but these parts form no part of my invention, and I make no
claim to them. E is a rod placed horizontally and is arranged in connection with the
strap fork for sliding the strap from the fast to the loose pulley. This rod E is made
secure in the clamp F, which is formed with screw threads and fits onto the screw G

page_text: operated by hand wheel H which causes the rod E to move end wise. When the frame
is stopped the yarn slackens, consequently the forked end of the trap levers drop, and
would be ready to be caught hold of by the catches 6 whenever the frame was set in
motion, but to prevent this the horizontal bar I is employed, and is arranged to be
raised or elevated as shewn in Fig. 8 for the purpose of supporting the forked ends of
the trap levers during the time the frame is not at work, and in order that the slack
may be taken up before the horizontal rod is lowered from under the forked ends of
the trap levers I form an incline d, and I employ a segmented lever J working upon
a short shaft K. The end of the horizontal bar I is bent and connected to the bottom
end of the segmented lever J so that as the segment is made to oscillate the bar I will
slide horizontally. The movement in one direction causes the bar to be elevated as
shewn at Fig. 8, and when elevated, supports the trap levers, but the opposite move-
ment causes the bar to descend, ceasing to support the trap levers, the tension of the
yarn in the eyelet being now sufficient for that purpose, therefore when the frame is
not at work with the strap on the loose pulley, the parts occupy the positions shewn in
Fig. 8, but when it is necessary to start the frame the hand wheel H is made to rotate,
causing the screw G to draw the rod E in the direction of the arrow m, and when the
strap has got nicely onto the fast pulley the machine is made to revolve, taking up the
slack yarn, whilst the trap levers are supported by the bar I, but the mechanism is so
timed that after the spindles have made two or three revolutions, the action of the
screw G will bring the catch e (carried by the clamp F, fixed to rod E, see Fig. 9)
under the end of the hinged pawl L, as shewn in Fig. 7, which catch will lift the
pawl L from a sneck made in the top of the segment J, whereupon a spring or weight,
not shown in the drawings, may be used to cause the bar 1 to move in the direction of
the arrow n, whereby the incline d formed underneath such bar will slide down the
part, the upper surface of which will then cease to support the trap levers, but the
slack of the yarn having been taken up, the tension will be sufficient to keep the forked
end of the trap levers clear of the catches until a thread breaks, when the levers will
fall and act in the ordinary manner. When the frame must be stopped the hand
wheel H is made to revolve in the opposite direction, bringing the segment J back by
the rod E, pulling the chain M, the catch e will be removed from underneath the
pawl L allowing it to drop onto the segment upon which it rides until the sneck in the
segment is presented to the pawl, when the segment and bar I will be held in position
until the frame is again started.
By combining with the strap shifting mechanism the sliding bar I and segment J,
the slack yarn is always taken up before the bars have released their hold of the trap
levers D, consequently the hard twist which is now made will be avoided.
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 :-
Firstly. In twisting frames having stop motions, the combination therewith of
an idle pulley and brake for stopping the rotation of the spindle on the breakage of
the yarn, the whole being operated in manner substantially as described.
Secondly. In trap twisting frames, the employment of the segment or other
mechanical equivalent for coupling the strap shifting mechanism with the sliding bar I
for purposes and in the manner substantially as heroin shewn and described.
Dated this 12th day of Desember 1920
TASKER & CROSSLEY,
Halifax, Agents.