Improvements in Snarling Motions for Self Acting Mules.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Snarling Motions for Self Acting Mules.
We, JOHN MCQUEEN, of John Hetherington and Sons Limited, of Vulcan
Works, Pollard Street, Manchester, 'in the County of Lancaster, Machine Maker,
and GEORGE EDWARD Ross, of the same address, Manager, do hereby declare the
nature of this invention to be as follows;-
-
Our invention relates to improvements in snarling motion for self acting mules
and the object of our invention is to set the spindles in motion before the drawing
rollers particularly while the nose of the cops is being formed and so to avoid snarls
in the yarn when being wound upon the spindles.
In carrying our invention into effect we employ the ordinary clutch motion for
driving the front roller shaft, with the disc fast upon the roller shaft, the disc
being arranged to convey motion to the clutch by projections which come into
contact with snugs on the clutch, the spaces between the projections on the
disc being much wider than the width of the driving snugs on the clutch.
To set the spindles in motion before the drawing rollers we pivot to the side
of the headstock a lever so that each time the carriage completes its inward run
one of the faller shafts comes in contact with and moves the lever and causes its
other end to actuate a ratchet pawl which moves a ratchet wheel one tooth; this
ratchet wheel is secured to a screwed stud having its bearings in the bridge of
the headstock. To a nut on this screw is secured a small band or cord one end of
which passes over a groove cut in the periphery of the clutch and supports a weight,
and the other end of the band passes over a guide pulley and supports a smaller
weight.
When the mule is at work each time it completes its inward run the ratchet
wheel is moved one tooth and the nut which it guided so that it cannot turn, is
gradually moved down the screw; the heavier weight when the clutch is stationary
moving it and so drawing its snugs away from the projections on the disc, until
by the time the nose on the cops is being formed there will be some space between
these parts, and the spindles will therefore be set in motion before the front
rollers, and thus snarls in the yarn will be prevented.
The backward movement given to the clutch by the weighted band could be
varied by changing the ratchet wheel.
Dated this 31st day of December 1898.
H. B. BARLOW & GILLETT,
Agents for Applicants.

page_text: Improvements in Snarling Motions for Self Acting Mules.
We, JOHN MCQUEEN, of John Hetherington and Sons Limited, of Vulcan
Works, Pollard Street, Manchester, in the County of Lancaster, Machine Maker,
and GEORGE EDWARD Ross, of the same address, Manager, 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:-
Our invention relates to improvements in snarling motions of self acting mules
and the object of our invention is to set the spindles in motion before the drawing
rollers particularly while the nose of the cops is being formed and so to avoid
snarls in the yarn when being wound upon the spindles.
In carrying our invention into effect we employ the ordinary clutch motion for
driving the front roller shaft, with the disc fast upon the roller shaft, the clutch
being arranged to convey motion to the disc by snugs which come into contact
with proiections on the disc, the spaces between the projections on the disc being
much wider than the width of the driving snugs on the clutch.
F
To set the spindles in motion before the drawing rollers we pivot to the side of
the headstock a lever so that each time the carriage completes its inward run one
of the faller shafts comes in contact with and moves the lever and causes its other
end to actuate a ratchet pawl which moves a screwed stud having its bearings in
the bridge of the headstock. Through an eye on a nut on this screw is passed a
small hand or cord which is knotted above the nut so that the knot cannot pass
through, the eye: one end of this cord masses over a groove cut in the periphery of
the clutch and supports a weight, and the other end of the band passes over a
guide pulley and supperts a smaller weight.
When the mule is at work each time it completes its inward run the ratchet
wheels moved one tooth and the nut which is guided so that it cannot turn, is
gradually moved down the screw. the heavier weight when the clutch is stationary
moving it and so drawing its snues away from the projections on the disc, whereby
some space will be left between these parts and the spindles will therefore, he set
in motion before the front rollers, and thus snarls in the yarn will be. prevented……..
In the accompanying sheet of drawings-
Figure 1 is a side view and Figure 2 an end view of part of the headstock of a
self acting mule to which our improvements are applied.
In the drawings a designates the headstock, b the front roller shaft, cone-half
of the usual clutch mounted loose upon the front roller shaft. and d. a disc,, not
shown in Fig. 1. fast upon the same shaft, and through which it is driven by
means of the other half clutch, not shown but which is also loose upon the shaft.
On the face of the clutch c are two snugs e and on the disc d, are projections f
which lie in the path of the snugs e.
We accomplish our object of setting the spindles into motion before the drawing
rollers in the following manner--
We pivot to the side of the headstock a a lever g. the tail end of which lies
under one end of a ratchet pawl h and the pawl engages with the teeth in a ratchet
wheel, secured to a screwed stud having its bearings in the bridge of the head-
stock. On the thread of the screw is fitted, so that it cannot turn on the screw, a
nut and through an eye on this nut is passed a band or cord which is
knotted above the nut so that the knot cannot pass through the eye; the lower
portion of the band passes under a guide pulley and thence over a groove in
the clutch c and supports a weight m: the other end of the band 7 passes over a
guide pulley n and supports a smaller counterbalance weight o.

page_text: When the mule is at work each time the carriage completes its inward run one
of the faller shafts, or other convenient part of the carriage comes into contact
with and moves the end of the lever g, and simultaneously the ratchet pawl h
acting upon the ratchet wheel i turns it say one tooth, thus partially turning the
screwed stud j and moving the nut k downward; at this time the driving part of
the clutch (not shown) will be out of gear with the portion c but when they are
in gear and the portion is driven its snugs e meet the projections of and so
give motion to the disc d and the front roller shaft in the direction indicated
by the arrow on the disc d, Fig. 2. As the portion c revolves the frictional
contact between it and the band aided by the weight o overcomes the resistance
of the weight m and draws up the band 7 and raises the knot above the nut k
until its further progress is stopped by the weight m coming against a stop
not shown.
As the nut is moved downward at every draw it follows that at each successive
draw there is a gradually increased space between it and the knot in the band 7,
consequently when the driving part of the clutch comes out of gear the weight m
overcoming the weight o, draws down the band and partially turns the half
clutch and moves the snugs e away from the projections f until the further
downward movement of the weight m is checked by the knot in the band reaching
the eve in the nut k. As already described the knot is raised to the same point
but the nut is lowered at every draw so that the half clutch c will be gradually
turned further back and the space between the snugs e and the projections f
slightly increased.
When, therefore, the spindles are started and the driving portion of the clutch
is moved into gear a pause or dwell will take place before the front roller shaft
receives its motion, this pause depending upon the distance through which the
clutch and snugs e travel before they meet the projections on the fast disc d.
and as this distance gradually increases it follows that the front roller shaft is
caused to start rather later after each successive draw during the building of the
cops, whereby the formation of snarls in the yarn is avoided.
The backward movement given to the clutch c by the weighted band 7 could be
varied by changing the ratchet wheel or the pitch of thread on the stud j
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. In combination the disc fast upon the front roller shaft and formed with
projections, the half clutch loose upon the said shaft and formed with snugs adapted
to engage said projections when the other half clutch is brought into gear to drive
the first half, and means such as the ratchet gearing, screw, nut and weighted
cord for gradually turning the half clutch and so increasing the distance between
the snugs and projections at each draw of the carriage all substantially as and for
the purposes herein set forth.
2. The general combination and arrangement of parts embodying our improve-
ments in snarling motions for self acting mules substantially as and for the pur-
poses herein described and as illustrated by the accompanying drawings.
Dated this 4th day of September 1899
H. B. BARLOW & GILLETT,
Agents for Applicants. 17, St. Ann's Square, Manchester.