Improvements in Machinery for Doubling or Twisting Yarn or i Thread.
Year: 1888

page_text: PROVISIONAL SPECIFICATION.
Improvements in Machinery for Doubling or Twisting Yarn or i
Thread.
We PRINCE SMITH the Younger of the firm of Prince Smith & Son of Burlington
Shed, Keighley in the County of York, Machine Maker and SMITH AMBLER of the
same place and in the employment of the said firm; Draughtsman, do hereby declare
the nature of this invention to be as follows:-
The invention relates to improvements in the construction and operation of the stop
motion of Doubling or Twisting machinery for yarns or threads and means for driving
the spindles thereof.
The objects of the invention are to prevent waste in doubling or twisting yarns or
threads either two fold, threefold or more and to enable piecing to be effected with
greater facility, and without danger of the loose end or ends produced in case of
breakage or failure of supply being off, onto the bobbins and further to improve the
means of connection and disconnection of the driving mechanism with the driven
spindles on to which the bobbins for the twisted or doubled yarns or threads are
mounted.
In carrying out our invention the ends, threads or yarns from the bobbins, cops or
other sources of supply, are carried through thread, guides projecting from weighted
or balanced back trap levers centred on an axis passing through their fulcra and
carried by another or intermediate swing frame consisting of two arms centred at
their upper ends to a fixed rail carried by the framing of the machine and at their other
ends these connected arms or swing frame carry a pin or axis on which swings the
jointed front trap lever which at one end carries the pot eye or twizzle guide for the
threads being twisted and on its other member carries a weighted or balancing part
and a shaped end adapted to engage or catch in a revolving roller or recessed axis so
that an engagement between these parts may immediately result from breakage or
failure of either yarn or thread. On the same fixed rail referred to is centred another
or outer frame which is formed with an upward and forward extension carrying
journals for the top press roller under and partly around which the threads pass

page_text: from a guide fixed to a rearward extension of this frame and said threads pass to
and around a guide or stem on the same extension and thence to the pot eye-
the threads thereby being kept in tension during their twisting, whilst dependent
from this rearward extension are arms which carry bearings from a pin or centre
for an arm which arm passes to and serves as the lifting means for the spindle
parts to take them out of rotation and on this arm is an incline which when the
arm is operated in one direction rides up on a fixed bar and in the other direction
is lowered, thus raising and lowering the spindle.
The top press roller receives its motion from the constant revolution of the low
roller.
The bearings of the intermediate frame and of the top roller carrying, or outer, frame on
the fixed rail have each stop pieces which engage when the trap lever and parts is drawn
into position and lifts by these stops the outer frame so that a stop thereon may be
placed in correct position for a bell crank or similar trigger lever centred to an arm
carried by the framing, to be properly brought under said stop for its one arm
to support the outer frame and parts carried by it in working order for twisting.
The other or trigger arm of this bell crank is formed to be moved by a projection
from the intermediate frame when the end of the back trap lever falls and is
caught by the revolving recessed roller and is knocked forward and when this
movement takes place the back trap lever carries with it the intermediate frame
and the stud in the intermediate frame lifts this trigger lever and the trigger is
pulled from under the stud or support of the outer frame and that frame rocks
on the common central support afforded by the fixed rail referred to and
lifts the top presser roller and so causes supply of thread to cease whilst at the
same time the other extension .of this outer frame has pushed forward the lifting
arm which riding up on its incline engages the spindle and by its riding
up it raises the spindle from the parts rotating it and so causes the stoppage of
rotation.
The engagement of the spindle and its driving gearing may be by frictional
surfaces in the ordinary known manner or by like means.
We by preference however effect the driving of the spindle by means of a
surface of metallic pins or card teeth on the one part engaging and being dis-
engaged from a surface of pins or card teeth on a corresponding part on the other
-the one part being the driving part and the other part the driven part, and the
engagement and disengagement is effected by the interlocking and withdrawing
from interlocking of the
"
bristles or wires of metal or "teeth" of the card surfaces
from each other.
3
1

page_text: allowed to fall by breakage of thread in front of the roller ; to catch in a revolving
roller / so that an engagement between these parts f³ and h may immediately result
and the intermediate frame c and its connected parts are driven forward stopping the
delivery of yarn and the rotation of the spindle in the like manner to that which
takes place when the thread breaks at the rear and one of the back trap levers b
fall.
On the same centre pin c¹ borne by arms &, from fixed rail d, referred to, is
supported the outer frame i formed with an upward and forward extension ¹ carrying
the top press roller ; under and partly around which roller ; the threads pass from a
guide fixed to a rearward extension i³ of this frame and said threads pass to and
around a guide piece on a stem on the same extension and thence to the pot
eyef the threads thereby being kept in tension during their twisting.
The piece is of somewhat oval cross section the stem being received into a hole
there through situated eccentrically of the centre so that by the shifting said piece i* is
subject to in use on its centre pin the thread passing to the top roller may impinge on
a fresh line from time to time and so avoid wearing a groove in said top roller.
From the rearward extension project downward bent arms which carry bearings
for a pin or centre k¹ for a vertical arm k which arm k passes down and is hinged to a
horizontal lever arm centred in bearings borne by arinsk from the bracket k³
the forward end of the lever k being forked and embracing with its fork ko the
neck of the spindle and carrying the bobbin and serving to take them and the
spindle out of rotation by lifting the spindle away from its driving part 1³ driven by
the band m from the roller n. 1 is a recess for lubricant.
The top press roller ; receives its motion from the constant revolution of the low
roller j¹.
On the supporting arms d' are formed other rearwardly projecting arms d³ carrying
bearings d for a centre pin d³ on which is borne with capability of swinging within
certain bounds a trigger arm o, one arm o¹ of this trigger projects upward and when
the parts are in working order and the threads being doubled intact, comes under
the projection from the side of the outer frame and the other arm o³ of this
trigger o rests. with its inclined end piece o³ in contact with the projections c formed
on the intermediate frame c but when the thread having broken or supply ceased
the end of one of the back trap levers 6 falls and is caught by the revolving
projections of the roller and is by such roller driven forward carrying with it
the rest of the back trap levers and the frame c and as the frame c moves forward
the piece by its incline pushes up the piece o³, tilts the bell cranked trigger o
on its centre and removes its end o¹ from under the projection allowing the
frame to tilt also and its rearward part to drop down at the same time lifting
the upper roller ; off the lower roller. The lowering of the part lowers the
arm thereby lowering the arm k and the longer end which raises the forked
end and disconnects the frictional or other coupling between the parts and
the spindle thereby stopping the rotation of the bobbin l.
P, pare two bars connected together and one above the other by parallel rule
joints g, p² so that the upper bar p¹ when pressed from right to left of the
machine as seen in Figure 3 will rise and when fully raised will serve as a
support for the back and front trap lever bars when setting the frame in order
before starting, and said bar is lowered in working.
The engagement of the spindle and its driving gearing may be by frictional
surfaces in the ordinary known manner or by like means.
We by preference however effect the driving of the spindle by means of two
intersecting surfaces of metallic pins or card teeth the one surface of pins on the
under side of the upper parts 13 engaging and being disengaged from a surface
of pins or card teeth on upper side of the lower part the one part being the
driving part and the other part the driven part, and the engagement and disengage-
ment is effected by the interlocking and withdrawing from interlocking of the
"bristles" or wires of metal or "teeth" of the card surfaces from each other by the
lifting or lowering of the parts P, 13 by the forked end of the lever k³.

page_text: Figure 19 shows by vertical section and Figure 20 by underside and upper side
views respectively. the engaging faces of the clutch formed of bristles or pins r which
are made to engage or are drawn apart as desired.
We make no claim separately considered to the use of the part when not mounted
on an intermediate swing part as c as the same has been long used for similar
purposes.
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 :
1. The combination or arrangement and use of parts of apparatus for doubling or
twisting yarn or thread whereby weighted or balanced back trap levers and a front
trap lever are held in position for working by the threads and which when thread
breaks come in contact with a rotating or other part such moving part acting to knock
the said levers out of working position at the same time causing a trigger to be
released removing support from parts whose movement results in causing the top
roller to be disengaged from the under roller and the rotation of the bobbin spindle to
cease, substantially as set forth.
2. The combination or arrangement and use with apparatus or machinery for
doubling or twisting yarn or thread of a jointed front trap lever borne on an inter-
mediate frame c with back trap levers b, b, b, b (or other number thereof) a rotating or
continuously moving part, as h, a frame and parts thereof for supporting the top
roller, guiding the threads, and effecting the regulating of the rotation of the driving
spindle and all coöperating to form a stop motion to prevent waste of yarn or thread,
substantially as set forth.
3. The combination or arrangement and use with machinery for doubling or twisting
yarn or thread of surfaces of pins or bristles so as to form clutches or engaging and
disengaging means, for use in driving the spindles carrying the bobbins on which
yarn or thread is to be wound substantially as set forth.
4. The combination or arrangement of parts of machinery for doubling or twisting
yarn or thread, substantially as set forth.
Dated the 25th day of January 1889.