Improvement in Stop Motions for Machines for Drawing Fibrous Material.
Year: 1892

page_text: Date of Application, 3rd Feb., 1892-Accepted, 2nd Apr., 1892
COMPLETE DI MUITIVATION.
[Communicated from abroad by JOHN C. BALDWIN, of Centredale, in the Town of
North Providence, in the County of Providence, in the State of Rhode Island,
United States of America, Spinner.]
Improvement in Stop Motions for Machines for Drawing Fibrous
Material.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents
45 Southampton Buildings, in the County of Middlesex, 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:-
My invention is applicable to all drawing machines using sheep's wool, alpaca
wool, mohair, camel's hair or other fibrous material, where two or more doublings
or slivers are run through back rolls to be drawn.
My invention consists in the combination with a drawing machine which has the
usual shipping rod and lever to shift the driving belt from a fast pulley to a loose
pulley, of a fixed clearing strip, two lever arms rigidly mounted on a rock-shaft
and extending upward provided with a comb, which is supported by the upper ends
of said arms, means for balancing said arms and appurtenances to keep them in
proper position while the sliver is properly passing to the rolls, but which means
permit the unbalancing and movement of said arms and appurtenances when the
sliver breaks, a bent finger secured to said rock-shaft, a weighted lever supported
normally upon a bracket or rod and in engagement with said bent finger, but
adapted to be knocked off of said bracket by said finger, whenever the lever arms
and appurtenances are unbalanced whereupon said weighted lever falls by gravity
and moves the shipper so as to shift the belt and stop the machine.
In the accompanying drawing,
Figure 1 is a view of my invention and such parts of a drawing machine as are
necessary to illustrate the location and action of the same, said view being partly
in side elevation and partly in section on line a x of Figure 2.
Figure 2 is a rear elevation of my invention and the said parts of a drawing
machine.
Figure 3 is the same as the upper half of Figure 1 except that Figure 1 shows
the parts in position as seen when the drawing machine is in operation and that
Figure 3 shows the position of the parts when the stop motion has acted as herein-
after specified.
Figures 4 and 5 are enlarged views of the comb, Figure 5 being shown as seen
on line z of Figure 4.
A represents the frame of a drawing machine. It has the usual shipping rod a,
shipping lever & shipper handle c and the other common belt shifting devices. B B are
the rolls, C the guide, D the creel, E E¹ the bobbins and d d the sliver passing
from the bobbins through the guides and to and between the rolls. F is a rock-
shaft, extending along the machine from side to side and mounted in the upright
standards G of the frame. On each end of the rock-shaft F a lever arm H is
firmly mounted by a collar and set screw and a comb I is fastened to each arm H
on the top end thereof and extends the entire distance between said arms.
counterpoise or weighted arm J is secured to one of the arms H and is set at such
an angle thereto as to normally keep the arms H in the position shown in Figure 1.
The counterpoise J, being pivotally connected with the arm H, can be thus
angularly adjusted and set in position by the nut e. A stop plate K is fixed upon
the upright G of the frame and is adjustable thereon by the screw and slot, as seen
in Figures 1 and 3. The counterpoise J draws the arm H to the edge of said stop
A

page_text: plate K so as to abut the same. A bent-finger L is secured to the rock-shaft F by
a collar and set screw, as shown. A bracket or supporting rod M, having a guide
pin is fastened to a rail N of the frame. A bent lever O is loosely mounted on
the shipping rod a and its free end is supported on the bracket M at the end
thereof. Said bent lever O has a dog g secured thereon by a collar and set screw,
and, if desired, a weight h is placed on said lever O. By adjustment of the weight
thereon toward or from the end of the lever, the force of the fall of said lever,
when relieved can be regulated. A clearing strip P is secured to the machine and
extends from side to side. Hangers m. extend down from the creels D and a
supporting rod n extends therefrom at a right angle from side to side.
The operation of my improved stop motion is as follows. When the counterpoise.)
has been properly adjusted and set, the lever arms H abut lightly against the stop
plate K, being quite evenly balanced. The parts remain in this position as long as
the slivers d d pass properly to the rolls. But when a sliver das in Figure 3 has
entirely run off, so as to leave the bobbin E¹ empty, or when, for any cause, the
sliver breaks, the end of the sliver, as soon as it passes the supporting rod 12, falls
by its weight and catches on the toothed edge of the comb I. The draft of the
drawing rolls continuing, pulls in the sliver as before, but the end of the sliver, as
caught on the comb, pulls the comb toward the rolls and the draft is sufficient to
unbalamce the arms H and their appurtenances and to overcome the resistance of
the counterpoise J. This causes the parts to fall into the position shown in
Figure 3, where it is seen that the arms H have oscillated toward the rolls and
have carried the comb I beneath the clearing strip P, (so that the end of the
sliver d' is stripped from the comb) and as the rock shaft F is partially rotated by
this movement of the arms H the bent finger L strikes forcibly against the free
end of the bent lever O and knocks it off of its support on the bracket M.
The
lever then falls by its own weight, (augmented by the weight h) from the
position indicated in Figure 2 by solid lines, to the position indicated in said figure
by dotted lines. The dog g on said lever O is thus brought with great force
against the shipper lever b and the latter shifts the belt, in the usual manner from
the fast to the loose pulley, thus stopping the machine. The break in the sliver d'
is then mended by the operative, as usual, and the mended sliver runs over the
supporting rod n, as before. The free end of the bent lever O is lifted by hand
and placed again on its support M, the pin f serving as a guide or stop so that the
end of said lever cannot be set or accidentally misplaced too far from the end of
the bracket M for the suitable engagement of the finger L therewith.
finger L is again put into proper position relatively to the lever O and the arms H
with the counterpoise J and comb I are returned to the position indicated in
Figure 1, the stop plate K preventing the arms H from swinging back too far.
The
The supporting rod n not only prevents the unsightly sagging of the slivers d,
but being hung in a position between the first and second rows of bobbins, prac-
tically regulates the length of the broken ends of the slivers left to about twelve
inches, being the distance between the top roll and the first row of bobbins ; for
any sliver from the other rows of bobbins will be supported, though broken, until
it passes off from the rod n. I thus insure a uniform length of sliver which has not
yet reached the rolls, so that the broken end may be easily pieced.
As an operative is expected to tend several drawing machines at the same time,
and the rolls and bobbins on each machine are numerous, it is very difficult and
practically impossible for him to watch so carefully as to detect every break of
the sliver or every emptying of the bobbins. The consequence is that the machine
is liable to go on for some time before this accident is discovered and while it is so
doing, the yarn is necessarily thinner because it has less stock and the yarn, thus
imperfectly made will cause thinner places in the fabric where it is afterwards
woven or used. By the use of my device, the break or running out of the sliver
from any of the bobbins causes the machine instantly to stop, thus notifying the
operative of the accident before any damage has been done and enabling him to
remedy the defect. The consequence is that the yarn is more even and perfect

page_text: than has been made heretofore, and the great amount of waste commonly experienced
is entirely prevented and a great saving of time and labour is accomplished.
The comb I may be dispensed with in this device and a common rod or strip may
be used in place of it. If the parts are properly balanced, the draft of the sliver
over such rod or strip will be sufficient to swing the stop mechanism as above
described.
While I prefer to use the counterpoise J to secure the balancing of the parts, it
is obvious that other methods of balancing the arms H and their connections will
secure the same results so that such modifications of my device would be essentially
within my invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
First. In a drawing machine having the usual sliver bobbins creels and belt-
shipping mechanism the combination of a stop-plate, a rock-shaft suitably mounted,
a finger attached to said shaft, arms attached to said shaft and extending upward
therefrom, a device substantially as described to balance said arms so that they
lightly abut said stop-plate, a comb or strip supported at the upper end of said
arms a bracket or rest mechanism intermediate said finger and the shipping lever
adapted to be supported upon said rest while the machine is working properly but
to be released therefrom by the pressure of said finger to operate the shipping lever
when the sliver is broken or ends, said arms and their connected parts being so
arranged and adjusted as to be unbalanced and moved by the draft of the broken
sliver when engaged with said comb or strip substantially as specified.
Second. The combination with a drawing machine having the usual belt-shipping
mechanism, the sliver bobbins E and creels D of the stop-plate K upon the frame
of the machine, the rock-shaft F mounted as shown, the finger L extending from
said rock-shaft the arms H fixed on said shaft, the comb or strip I supporting the
arms H the counterpoise J attached to one of the arms H the bent lever O having
the dog g and loosely mounted on the shipper rod of the belt-shipping mechanism
and the bracket M all arranged and co-operating as and for the purpose specified.
Third. In a stop mechanism for a drawing machine the combination with a rock-
shaft, and oscillating arms thereon which are engageable and movable by a broken
sliver, of a shipper rod, a shipper lever, a bent lever fulcrumed on the shipper rod
and capable of moving the shipper lever by falling against the same by its own
gravity when released, a rest to support the free end of the bent lever, and a
knock-off device actuated by said rock-shaft to effect such release, substantially as
described.
Fourth. In a drawing machine the combination with a stop motion operated by
a sliver and having a comb which is capable of oscillation, of a clearing strip located
above said comb and adapted to lift the sliver off of said comb substantially as
shown.
Coruary 1992.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.