AN IMPROVED AUTOMATIC ARRANGEMENT FOR STOPPING HORIZONTAL SPINNING MACHINES
Year: 1884

page_text: We, ALEXANDER SINCLAIR MACPHERSON, Machinist, and GEORGE WILKINSON,
Mechanical Draughtsman both of Leeds in the County of York, do hereby declare
the nature of our Invention for "AN IMPROVED AUTOMATIC ARRANGEMENT FOR
STOPPING HORIZONTAL SPINNING MACHINES" to be as follows:-
This Invention relates to a novel arrangement of mechanism for shifting the
driving belt of horizontal spinning machines (used for spinning hemp yarns) when
the yarn breaks, or when the motive power engine is stopped.
In attaining this object we apply the principle of centrifugal force. A
convenient arrangement is to mount loosely upon the driving shaft the drag pulley,
which we connect by a band with a pulley keyed on the bobbin spindle. As the
bobbin is rotated by the pull of the flyer upon the yarn which it is lapping
around the bobbin, that motion will be transmitted through the band to the loose
drag pulley. Mounted on the boss of the pulley is a plate which is free to slide
over a feather on the boss.
Between this sliding plate and the pulley we form a connection which by means
of centrifugal force will be caused to thrust outwards the sliding plate.
The side of the drag pulley is pierced to form a guide for a pair of rods which
connect the sliding plate with a grooved collar mounted loosely on the driving
shaft. This grooved collar is embraced by a fork keyed upon a rock shaft to
which is also keyed an arm carrying an adjustable weight or connected with a
tension spring and communicating with the belt shifter. As the drag pulley
ceases to rotate (from the fracture of the yarn or the stoppage of the engine), the
sliding plate will move inwards to its normal position, under the action of the
weighted arm which will put the belt shifter in action and disconnect the spinning
frame from the driving gear.
By enlarging the grooved collar we may make the lateral pressure of the fork
upon the collar impart the requisite drag to the drag pulley. Or we may use the
automatic stop motion in combination with any ordinary drag.

page_text: We ALEXANDER SINCLAIR MACPHERSON Machinist, and, GEORGE WILKINSON
Mechanical Draughtsman, both of Leeds in the County of York, do hereby declare
the nature of our Invention for AN IMPROVED AUTOMATIC ARRANGEMENT FOR
STOPPING HORIZONTAL SPINNING MACHINES and in what manner the saine is to
be performed, to be particularly described and ascertained in and by the following
statement-
This Invention relates to a novel arrangement of mechanisin for shifting the
driving belts of horizontal spinning or twisting machines when the yarn or twine
breaks through the failure of the supply of sliver or otherwise or when the motive
power is reduced in speed preparatory to the stopping of the engine. In attaining
this object we apply the well known principle of centrifugal force to operate the
belt shifter automatically.
In the accompanying Drawings:-
-
Fig. 1, Sheet I, is a side elevation of a horizontal spinning or twisting machine
fitted according to our Invention and Fig. 2 is a plan view of the lower part of
half an ordinary machine such machine having usually two flyers which are driven
independently.
In Sheet II, Fig. 3 is an elevation of the rear end of the machine but with the
details of the Invention applied to one spindle only.
A is the horizontal flyer carried in end bearings as usual and receiving rotary
motion directly from the driving shaft. Bis the bobbin fitted to a hollow spindle C.
Through this spindle is passed the dead axle D that serves to steady the bobbin
.and retain it in its desired position and is capable of being withdrawn to permit of
the doffing of the bobbin. Keyed to the hollow spindle C is a pulley C a band
from which passes down to a drag pulley E mounted loosely on the driving shaft F.
Fitted within this band pulley is a ring of dogs e which are arranged radially,
and are intended, as the pulley is rapidly rotated to fly out towards a horizontal
position, and bear against a sliding disc G. This disc G is fitted to the extremity
of a sleeve G; the other end of which carries a friction disc G2 and between these
is formed upon the sleeve the grooved collar G³ for the purpose to be presently
explained.
The sleeve G¹ is strung upon the driving shaft F and is fitted to slide over a
feather on the boss of the drag pulley E. In front of the friction disc G² is a
friction disc F¹ which is keyed to the driving shaft F and rotates therewith. The
'position of the disc F1 on its shaft is such that the disc G' will be in contact
therewith so long as the dogs e are held towards a horizontal position by the action
of centrifugal force.
While this position of the parts is maintained a drag will be put upon the
pulley E, dependent in amount on the difference between the speed of rotation of
'the driving shaft F and the speed imparted to the pulley E through the bobbin
spindle C and its band pulley C¹
The grooved collar G³ on the sleeve G₁ is embraced by a forked arm H standing
up from a rock shaft H having its bearings on the lower part of the framing. A
weighted arm H2 of this rock shaft has a tendency to press the collar G³ and
consequently the disc G carried by the sleeve towards the pulley E and thereby
put a slight drag thereon. Connected adjustably to the weighted arm H2 (which
is slotted for the purpose) is a link rod H³ the upper end of which is pivotted to
the tail end of a catch bar H' having its fulcrum on the side of the framing. The
opposite end of this bar H* is formed with a catch which takes onto a pin carried

page_text: by a weighted bell crank lever H³ keyed to a rock shaft He having its bearings on
the lower part of the framing. Connected with this rock shaft is the belt shifter H'
which as the weighted bell crank lever H5 is released from the catch bar will be
caused to shift the driving belt from the fast pulley F to the loose pulley of the
driving shaft.
As the
Supposing now the flyer to be set in motion and sliver to be fed thereto in the
usual way the sliver as.it is spun into yarn will be laid around the bobbin, the
bobbin being pulled around by the yarn and thereby imparting an axial motion to
its sleeve spindle which through the band and pulley C₁ rotates the drag pulley E
as heretofore, the office of which pulley is to keep the yarn at tension.
bobbin fills it is necessary to increase this drag and this has been done by applying
friction thereto through the action of centrifugal force. It is the undue diminution
or cessation of this force which we now propose to utilize for the purpose of
stopping the action of the spinning machinery. The means for effecting this we
have already described and it only now remains to explain its action in detail.
While the machine is working efficiently the drag on the yarn will be maintained
by the contact of the two friction discs F and G. So soon, however, as the speed
of the bobbin spindle is reduced either by the fracture of the thread or the
stopping of the motive power engine the centrifugal force (due to the rotation of
the pulley E) which caused the friction discs to remain in contact will drop and
the belt shifting apparatus being no longer held out of action against the pull of
its weighted arms will throw off the driving belt from the fast pulley F2 to the
loose pulley and stop the driving of the flyer.
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-
Holding the automatic helt shifters of horizontal spinning machines out of
action by means of centrifugal force obtained from the rotation of the drag pulley
in the manner and for the purpose above set forth.
in t
Amunt 1004
NEWTON & SON,
Agents for the Applicants.