IMPROVEMENTS IN RING TWISTING MACHINERY
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by John Midgley at the Office of
the Commissioners of Patents, with his Petition, on the 20th April
1874. A communication from abroad by William Cockcroft and
Reuben Ackroyd, of Cheshire, Delaware County, Pennsylvania,
United States of America.
I, JOHN MIDGLEY, of Pudsey, near Leeds, in the County of York, Stuff
Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN RING TWISTING MACHINERY," a communication to me from
abroad by William Cockcroft and Reuben Ackroyd, of Cheshire,
Delaware County, Pennsylvania, United States of America, to be as
follows:-
The first part of the Invention consists of an improved tube, spindle,
spring, and oil cup. The spindle is hollowed for the purpose of lessening
friction. The foot of it is made either square or half round, to prevent
its turning round when fixed in place. The rail has two projecting
flanges, top and bottom. The spindle goes through the top flange and
fastens in the bottom one. On the back part of the rail between the two
flanges is a spring fastened by a set screw, each end of the spring

page_text: pressing against the spindle, thus preventing the vibration of the spindle
whilst the machine is running at a high rate of speed. The oil cup goes
into the top of the rail, thus allowing the bottom of the tube to come
down inside the cup, so that it will oil itself the whole length of the
spindle. The tube has a solid end so that when running it forms a
vacuum inside and oils itself.
The second part of the Invention consists in providing an improved
stop motion for ring twisting machines so adapted as to take up the
slack after a thread or yarn has broken and its ends been reunited. To
this end the upper face of the pulley is dished with two or more stopping
devices fixed on it, and on the front beam of the frame is a weighted
lever to each spindle and roller, having a yarn guide in the outer end
and through which the yarn passes, so that its tension will hold the inner
or weighted end of the lever up above a the dished pulley, wherein are
fixed two or more stopping devices so long as the yarn remains tout and
unbroken, but when the yarn breaks, the inner end of the lever will fall
and stop the delivery roller by engaging one of the stopping devices
fixed in the dished pulley, and thus prevent the further delivery of the
yarn until it is mended. The rotary motion of the spindle is derived
from a transverse drum or shaft, through the medium of a belt or band.
A spur gear wheel on the driving drum gears with a pinion which is
koyed on the shaft of a large pulley whose speed determines that of the
twisting spindle.
It is apparent that when the yarn breaks and the lever ongages the
dished pulley with the stopping devices fixed therein, it cannot bo
disengaged therefrom until the spindle has revolved sufficiently to take
up the slack which invariably occurs in such cases, and drawing the
yarn taut so as to hold the outer end of the lever. To effect this resul,
that is, take up the slack, all parts must operate save the spindle and
roller which are held locked. Hence we arrange the belt or band to
slip on its pulley, and as the arrangement of gearing is such that the
slip is very slight, the fractional resistance is practically of no account.