IMPROVEMENTS IN MULES FOR SPINNING
Year: 1881

page_text: LETTERS PATENT to Jolin Chisholm, of Oldham, in the County of Lancaster,
Machinist, and John Clegg, of the same Place, for an Invention of
"IMPROVEMENTS IN MULES FOR SPINNING."
PROVISIONAL SPECIFICATION left by the said John Chisholm and John
Clegg at the Office of the Commissioners of Patents on the 1st September
1881.
JOHN CHISHOLM, of Oldham, in the County of Lancaster, Machinist, and JOHN
CLEGG, of the same Place. "IMPROVEMENTS IN MULES FOR SPINNING."
Our Invention relates to ordinary self-acting mules for spinning cotton, wool,
and other fibre, and consists, first, in the method of reversing the motion of the
front roller so as to lay hold of the twisted part of the yarn while the twisting is
proceeding.
For this purpose we fasten on the front roller a pulley in the periphery of which
is a twitch groove; a pawl shaped to fit this groove is mounted loosely on a lever
whose centre of vibration is the front roller; to this lever is attached a connecting
rod, the other end of which is attached to a vertical lever fitted on a stud near the
back of the head stock; to the lower end of the lever is attached a connecting rod,
which passes under the carriage bottom toward the front of the head stock and
through a bracket; on this connecting rod is fixed an adjustable finger which is
acted upon by the carriage in running outward, which causes the front roller to
move slightly backward; to the vertical lever; below the stud on which it is
pivoted is fastened a spiral spring, the other end of the spring being fastened to
the headstock. This spiral spring on the run in of the carriage pulls the vertical
lever (against a stop) to its original position, which brings the pawl in contact
with a stop to release it from the twitch pulley, so as to allow the front roller to
revolve in the usual way.
The second part of our Invention consists in an improved method of latching

page_text: the long lever to prevent its return to the original position before being depressed,
and consists in placing a link between the long lever and a retaining lever to
which a spiral spring is attached.
At any convenient part near the end of the long lever we cast a projection in
which a notch is formed; we also make a notch in one end of the retaining lever,
to the other end of which a spiral spring is attached; between the two notches the
link is placed, the length of the link, together with the length between the centre
of the long lever and the notch therein, must be greater than the length between
the centre of the long lever and the notch in the retaining lever (when it is at
rest), so that the long lever will be always held either up or down.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Chisholm and John Clegg in the Great Seal Patent Office
on the 27th February 1882.
JOHN CHISHOLM, of Oldham, in the County of Lancaster, Machinist, and JOHN
CLEGG, of the same Place. "IMPROVEMENTS IN MULES FOR SPINNING."
Our Invention relates to ordinary self acting mules for spinning cotton, wool,
and other fibre, and consists, first, in the method of reversing the motion of the
front roller more particularly for waste spinning, so as to lay hold of the twisted
part of the yarn while the twisting is proceeding.
For this purpose we fasten on the front roller a pulley in the periphery of which
is a twitch groove; a pawl shaped to fit this groove is mounted loosely on a lever
whose centre of vibration is the front roller; to this lever is attached a connecting
rod, the other end of which is attached to a vertical lever fitted on a stud near the
back of the headstock; to the bottom end of this lever is attached a connecting
rod, which passes under the carriage bottom towards the front of the headstock and
through a bracket; on this connecting rod is fixed an adjustable finger which is
acted upon by the carriage in running outward, which causes the front roller to
move slightly backward to the vertical lever; below the stud on which it is
pivoted is fastened a spiral spring, the other end of the spring being fastened to
the headstock. This spiral spring on the run in of the carriage pulls the vertical
lever (against a stop) to its original position, which bring the pawl in contact with
a stop to release it from the twitch pulley, so as to allow the front roller to revolve
in the usual way.
The second part of our Invention relates to an improved method of latching the
long lever to prevent its return to the original position before being depressed on
the inward run of the carriage, and consists in placing a link between the long
lever and a retaining lever, to which a spiral spring is attached.
At any convenient part near the end of the long lever we cast a projection in
which a notch is formed; we also make a notch in one end of the retaining lever,
to the other end of which a spiral spring is attached; between the two notches the
link is placed, the length of the link, together with the length between the centre
of the long lever and the notch therein must be greater than the length between
the centre of the long lever and the notch in the retaining lever when it is in its
normal position, so that the long lever will be always held either up or down.
And in order that our Invention may be fully understood and readily carried
into effect, we will describe the accompanying Sheet of Drawings, reference being
had to the figures and letters marked thereon.
Fig. 1 is an elevation, and Fig. 2 is a plan of our improved apparatus for
reversing the motion of the front roller; Fig. 3 is an edge. view of part of the
same.
a is the axle of the front roller on which is secured the pulley b in which is an
annular taper groove; this groove receives a tapered end of the pawl c which is
fitted on a stud on the lever or segment d; this lever moves concentrically to the
axis of the front roller, the bearing of which forms its fulcrum; e is a set screw
which forms the stop piece to release the pawl from the groove in the pulley b
when the carriage recedes and allows the spring i to bring the pawl to its original
position; f is the connecting rod provided with a screw for adjustment, which
connects the lever d with the vibrating lever g pivoted on the stud h fixed near
the back of the headstock; i is a spring which is connected to the lever g and to
the headstock; j is the foot of the headstock which serves as a stop piece for the
lever g; to the lower part of the lever g is fastened the connecting rod k, which

page_text: passes under the carriage bottom; l is the adjustable finger secured on the rod k;
m is the bracket near the front of the headstock which forms a bearing for the
rod to slide in. The mule carriage in running outward moves the finger l, and
draws forward the rod and the lower end of the lever g, thus moving the upper
end of the lever g, the rod f, and lever & backward; the taper end of the pawl c,
immediately this backward motion commences, fixes itself in the groove in the
pulley b, and turns it and with it the front roller part of a revolution backward.
When the mule carriage runs inward, these motions are reversed by the spring i
drawing back the lower end of the lever g until it comes in contact with the
stop j; at the same time a projection connected to or formed with the pawl c is
moved against the adjustable set screw e, thus lifting the taper end of the pawl
out of contact with the groove in the pulley b, and allowing the front roller to
rotate as usual.
Fig. 4 is an elevation, and Fig. 5 is a plan of part of the long lever to which the
second part of our Invention is applied.
is the long lever fitted on the stud s; on this lever is cast a projection 7¹ in
which is formed a recess to receive one end of the link t; the other end of this link
enters a recess in the retaining lever u which is fitted on the stud v; we form
projecting lips at each end of the link to prevent lateral movement; a spring w
connects one end of the lever u to the frame; this spring draws up the lever u
and presses the part which receives the end of the link t toward the recess in the
lever the link is thus caused to hold the outer end of the long lever down in
the position shown on Fig. 4, when it has been depressed by the counter faller x
pressing on the finger 2 on the outward run of the carriage, and to retain it in
that position until the other end of the long lever (not shown on the Drawing) has
been depressed by the inward run of the carriage.
This part of our Invention might be modified by placing one end of the link in
a recess in the end of the long lever, and placing the other end of the link against
a spring in a socket (as shown at z, Fig. 4), or other support, so that the link
could move longitudinally when the long lever was moved up or down.
Having stated the nature of our Invention and described the manner of
performing the same,
We declare that we claim.—
performing the same,
We declare that we claim.—
1. The twitch pulley b connected to the top roller and actuated by the pawl c,
as and for the purpose shown and.described..
2. The use or employment of the link t for retaining the long rod in the required
position, substantially as shown and described.
In witness whereof, I, the said John Clegg, for myself and on behalf of the
said John Chisholm, have hereunto set my hand and seal, this Twenty fifth
day of February, One thousand eight hundred and eighty two.
JOHN CLEGG