IMPROVEMENTS IN OR CONNECTED WITH MACHINERY FOR WINDING YARN OR THREAD
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Bryce Muir Knox at the Office of
the Commissioners of Patents on the 3rd February 1882.
BRYCE MUIR KNOX, of Kilbirnie, in the County of Ayr, North-Britain.
"IMPROVEMENTS IN OR CONNECTED WITH MACHINERY FOR WINDING YARN OR
THREAD."
This Invention relates to improvements in winding machinery, and more par-
ticularly to improved means or appliances fitted in connection therewith, for
regulating the winding or "building" of the thread on to the bobbins, and for
automatically stopping the motion of any of the bobbins to prevent the breaking
of the thread when from any cause there is undue tension on it.
་
In carrying out the Invention according to one modification, the revolving
bobbin spindles are fitted horizontally (though they may be arranged vertically or
inclined) and are driven by means of belts or bands from the ordinary form of
driving drum or cylinder. A fast and a loose pulley are provided for each spindle
and as the driving bands are moved from one to the other, the bobbin spindles are
rotated or stopped. The shifting of the band from one pulley or the other, is
effected by a fork on a sliding bar provided for each band, and which is fitted with
a cord and weight to pull the bar and fork into such a position as to place the
driving band on the loose pulley. When the winding of the thread is to proceed,
this fork bar is pulled forward by the attendant until a notch in it catches on a
pawl or lever which retains it in its forward position in which the band is kept on
the fast pulley. The thread being wound passes from the "swift" carrying the
hank over a whorl or pulley fitted on the outer end of a regulated spring lever
over each bobbin, and when there is undue tension on the thread, caused for
example by stoppage of the "swift" or entangling of the hanks, the spring lever is
drawn down by the continued winding of the thread on to the bobbin, until an
arm or striker on it presses or strikes against and releases the catch lever which
retains the fork bar forward. Then the weighted fork bar immediately slides
back and by shifting the driving band on to the loose pulley stops the motion of
the bobbin spindle and the winding of the thread on to that bobbin, without
allowing the thread to be broken.
Each bobbin used is by preference conical or tapered, and the "building" or
winding on it of the thread, is effected by means of the ordinary construction of

page_text: traversing guide rail, operated however in such a manner as to cause a rapid move-
ment at that part of its traverse where the thread is led on to the top of the
bobbin, and a slower traverse where laying on the thread at the bottom end of the
bobbin, and thereby to build the thread on with a long tapering point and nearly
parallel towards the bottom of the bobbin.
The necessary motion of the traversing guide rail to cause the thread to be built
on the bobbin in this manner, is effected through a rocking shaft connected by cords
or chains to the sliding carrier of the guide rail, and to a long lever acted on by
means of a heart cam, counter-balancing weights or springs being provided as usual
to hold the guide rail against the action of the cam lever.
In another modification of the winding stop motion or arrangement, a single loose
pulley is fitted on each bobbin spindle on which the band always remains, and the
spindle is put in motion or stopped by means of a friction or toothed clutch
sliding on a groove or feather on the spindle, and operated by means of a fork or
a lever on the shifting fork bar described. The degree of tension to which the
thread may be subjected before causing the bobbin to stop may be regulated for
different kinds of thread or yarn, by adjusting the spring which holds up the spring
lever to give it a greater or less leverage against the pull or tension on the thread
passing over the pulley to the bobbin.