IMPROVEMENTS IN MULES AND TWINERS."
Year: 1881

page_text: LETTERS PATENT to John Chisholm and John Clegg, both of Oldham, in the
County of Lancaster, for an Invention of "IMPROVEMENTS IN MULES AND
TWINERS."
PROVISIONAL SPECIFICATION left by the said John Chisholm and John
Clegg at the Office of the Commissioners of Patents on the 9th November
1881.
"
JOHN CHISHOLM and JOHN CLEGG, both of Oldham, in the County of Lancaster.
IMPROVEMENTS IN MULES AND TWINERS."
Our Invention relates to the driving of the cam, backing off, and taking in
motion shafts of mules and twiners, and it consists in the application of a
tightening pulley to secure the requisite tension of the ropes or straps employed.
In carrying out our Invention we use ropes or straps and dispense with the
ordinary taking in and loose pulley wheels. On the cross taking in shaft of the
headstock is mounted a double grooved pulley, and on the countershaft or whatever
shaft drives the mule or twiner is mounted a pulley with three or more grooves;
between these two pulleys we place an adjustable carrier pulley supported in a
frame whose centre of oscillation is on the cross shaft above mentioned; this is
perferably arranged so that the carrier pulley may swivel around the axis of the
bottom pulley, so that its centre may be in line with the centres of the driving and
driven pulleys.
In this frame is fixed a tightening screw with a hand wheel attached, so that
the minder can at pleasure turn the screw and increase the distance between the
driving pulley and the carrier pulley and thus tighten the band or rope.
The rope or strap is endless, and is passed, say, commencing at the carrier pulley,
then over the first groove in the driving pulley, then over the first groove of the
driven pulley, then over the second groove of the driving pulley, then over the
second groove of the driven pulley, then over the third groove of the driving
pulley, and then to the carrier pulley, thus completing the round.
More than one rope or band may be thus used by increasing the number of
grooves in the pulleys.

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 6th May 1882.
JOHN CHISHOLM and JOHN CLEGG, both of Oldham, in the County of Lancaster.
IMPROVEMENTS IN MULES AND TWINERS."
Our Invention relates to the driving of the cam, backing-off and taking-in
motion shafts of mules and twiners, and it consists in the application of a
tightening pulley to secure the requisite tension of the ropes or straps employed.
In carrying out our Invention we use ropes or straps and dispense with the
ordinary taking-in and loose pulley wheels. On the cross taking-in shaft of the
headstock is mounted a double grooved pulley, and on the counter shaft or
whatever shaft drives the mule or twiner, is mounted a pulley with three or more
grooves; between these two pulleys we place an adjustable carrier tension pulley,
supported in a frame whose centre of oscillation is on the cross shaft above
mentioned; this is preferably arranged so that the carrier pulley may swivel
around the.axis of the bottom pulley, so that its centre may be in line with the
centres of the driving and driven, pulleys.
-
In this frame is fixed a tightening screw with a hand wheel attached, so that
the minder can at pleasure turn the screw and increase the distance between the
driving pulley and the carrier pulley, and thus tighten the band or rope.
The rope or strap is endless, and is passed, say, commencing at the carrier
pulley, then over the first groove in the driving pulley, then over the first groove
in the driven pulley, then over the second groove in the driving pulley, then over
the second groove of the driven pulley, then over the third groove of the driving
pulley, and then to the carrier pulley, thus completing the round.
More than one rope or band may be thus used by increasing the number of
grooves in the pulleys.
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 shows an end view of part of a mule or twiner to which our Invention is
applied, and Fig. 2 shows a front view of the same.
a is the cross taking-in shaft of the headstock, on which is fixed the pulley b, in
which are two grooves; c is a pulley, in which are three grooves fitted on the shaft
which drives the mule or twiner; & is the adjustable carrier or tension pulley,
which turns on a stud carried by the swing frame e, provided with a screw to move
the pulley d to tighten the band or rope that passes over or under the pulleys b, c,
and d, as above described.
By the use of our Invention the desired tension of the band or rope which
drives the cam, backing-off, and taking-in motion shafts of a mule or twiner may
be easily maintained, and the band can be tightened in a moment without stopping
the machine.
Having stated the nature of our Invention, and described the manner of
performing the same,
We declare that we claim,
The combination with the pulleys b and c of the tension pulley d, substantially
as and for the purpose herein shown and described.
In witness whereof, we, the said John Chisholm and John Clegg, have
hereunto set our hands and seals, this Fifth day of May, One thousand
eight hundred and eighty two.
JOHN CHISHOLM. (L.S.)
JOHN CLEGG.
(L.S.)