IMPROVEMENTS IN BRAKE APPARATUS FOR THE SPINDLES OF YARN OR THREAD WINDING FRAMES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Bryce Muir Knox at the Office of
the Commissioners of Patents on the 30th November 1882.
BRYCE MUIR KNOX, of Kilbirnie, in the County of Ayr, North Britain,
* IMPROVEMENTS IN BRAKE APPARATUS FOR THE SPINDLES OF YARN OR THREAD
WINDING FRAMES,"
This Invention relates to brake apparatus to be applied to the bobbin spindles
of yarn or thread winding frames or machines, in combination with what are
known as stop motions for preventing the breaking of the thread in winding, or
for stopping the spindles when the thread is broken.
The improved brake apparatus may be arranged to suit stop motions of different
kinds, but is specially designed to be applied in combination with stop motions
of the kind described in the Specification of Letters Patent granted to the present
applicant and dated 16th May, 1882, N° 2290. In such stop motions it is found
that when the bobbin spindles are revolving at extremely high velocities, the
momentum of the bobbin causes it to revolve for some time after its spindle is
thrown out of gear; and the tension on the thread may be such as to cause it to
break. The object of the present Invention is to prevent the continued rotation
of the bobbin, by applying a brake to the spindle, to stop it instantaneously when
the spindle is thrown out of gear.
The improved brake apparatus, as applied to stop motions of the kind referred
to, in which the lower arm of an oscillating tension lever is caused to shift the
driving belt of the bobbin spindles from a fast to a loose pulley, or to throw a
clutch out of gear, when there is undue tension on the thread being wound, and
as applied to winding machines with vertical spindles consists of a weighted disc
carried by a short lever which rests on the lower arm of the said oscillating
tension lever, and is raised or allowed to fall with the oscillating lever as it moves
to throw the bobbin spindle out of gear. The weighted disc has its lower surface,
by preference, covered with leather, rubber, or other similar material, which, when
the disc falls, comes in contact with the fast pulley on the bobbin spindle, and by
friction at once brings the spindle to rest,

page_text: The friction disc may be brought to bear on the edge of the driving pulley
either by means of a weight, or by a spring, which is distended to keep the
friction disc up while the winding proceeds regularly; but which is released when
the oscillating lever is caused, by the tension on the thread, to shift the belt from
the fast to the loose pulley of the bobbin spindle, or to throw the clutch out of
gear to stop the winding action.
In applying the Invention to winding frames or machines with horizontal
spindles the brake may be conveniently applied to the periphery of the fast
pulley of the bobbin spindle, or to the edge of the bobbin, to prevent rotation of
the bobbin after the spindle is thrown out of gear by the stop inotion. In such a
case the brake disc will be formed to fit the periphery of the pulley or bobbin.
The improved brake apparatus may be applied in connection with any of the
ordinary stop motions employed in winding frames, or machines, or in doubling
and twisting frames, to prevent continued rotation of the bobbin after the stop
motion acts to throw the driving spindle out of gear.