Improvements in or relating to Loom Brakes.
Year: 1889

page_text: Date of Application, 1st Aug., 1889
Complete Specification Left, 15th Jan., 1890-Accepted, 15th Feb., 1890
PROVISIONAL
SPECIFICATION.
Improvements in or relating to Loom Brakes.
We, HENRY RATCLIFFE of 3 Bedford Square, Overlooker and PETER RATCLIFFE
of 41 Bedford Square, Overlooker both of Leigh near Manchester in the County
of Lancaster, do hereby declare the nature of our said invention to be as
follows:-
This invention relates to improvements in or relating to loom brakes and is
designed to stop the "sley" in the centre or thereabouts of its travel in the second
pick after the "weft" is broken. This we accomplish by mounting a brake lever on
a stud which allows of the said lever with its clog end swivelling to and from the
underside of the brake pulley. On the underside of the clog end of the brake lever
is fixed an arm upon which operates a cam to press the brake lever against the brake
pulley each time the brake lever is placed in position for stopping the loom. The
cam is mounted on the tappet shaft of the loom at a point below the brake lever.
The arm on the underside of the brake lever is adjustable to allow of the same being
set to the picking of the loom and to compensate for wear. To the front end of the
brake lever is attached an upright carrying a pivoted arm or lever. The outer end
of the latter is held in a slotted fixing on the spring starting handle of the loom, by
which the brake can be released from the brake pulley to allow of the loom being
operated by hand. When the loom is started by means of the spring handle the
pivoted arm or lever drops into the lower part of the slotted fixing to allow of
the brake lever being operated in case the "weft" breaks or it is desired to stop
the loom.
Dated 21 T11000
EDMUND CHADWICK,
Agent
COMPLETE SPECIFICATION.
Improvements in or relating to Loom Brakes.
We, HENRY RATCLIFFE of 3 Bedford Square, Overlooker, and PETER RATCLIFFE
of 41 Bedford Square, Overlooker, both of Leigh near Manchester in the County of
Lancaster, do hereby declare the nature of our said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This invention relates to improvements in or relating to loom brakes and is
designed to stop the "sley" in the centre or thereabouts of its travel in the second
pick after the "weft" is broken. This we accomplish by mounting a brake lever on
a stud which allows of the said lever with its clog end swivelling to and from the
underside of the brake pulley. On the underside of the clog end of the brake lever
is fixed an arm upon which operates a cam to press the brake lever against the brake
pulley each time the brake lever is placed in position for stopping the loom.
The
cam is mounted on the tappet shaft of the loom at a point below the brake lever.
The arm on the underside of the brake lever is adjustable to allow of the same being
set to the picking of the loom and to compensate for wear. To the front end of the
brake lever is attached an upright carrying a pivoted arm or lever. The outer end
of the latter is held in a slotted fixing on the spring starting handle of the loom, by
which the brake can be released from the brake pulley to allow of the loom being
operated by hand.
When the loom is started by means of the spring handle the
pivoted arm or lever drops into the lower part of the slotted fixing to allow of
the brake lever being operated in case the "weft" breaks or it is desired to stop
the loom.

page_text: Fig. 1 is a side elevation of our invention as applied to a loom-
Fig. 2 is a plan, and Fig. 3 is a front elevation of same.
To the loom side A is attached the fixing B by the bolt C. The brake lever D is
mounted on the fixing B by the stud E; the latter allowing the brake lever:D with its
clog end F to swivel to and from the underside of the brake pulley G on the crank
shaft H of the loom. To the upper side of the clog end F that operates on the face of
the brake pulley G is attached the strip I of leather or other suitable substance, secured
by rivets or other means. To the underside of the brake lever D is fixed the spring
arm J extending to the underside of the clog end F. If desired the spring arm J can
be of the form shown in Fig. 6. To the front end of the brake lever D is attached the
upright M carrying the pivoted arm or lever N. The outer end of the latter is held
in the slotted fixing O on the spring starting handle P.
This invention operates in the following manner :- -When the loom is set in motion
by means of the spring starting handle P, the latter is in the position shown in Fig. 4,
and the brake lever D is out of contact with the brake pulley G as shown in dotted
lines in Fig. 2. When the brake lever D is in this position it will be seen that
the cam K is free to rotate with the tappet shaft L of the loom. Immediately
the starting handle P is released to stop the loom it assumes the position_shown
in Fig. 3, and places the brake lever under the brake pulley Gas in Figs. 1
and 2. The brake lever D having been placed under the brake pulley G is pressed
thereto immediately the cam K operates on the spring arm J and presses or forces
it against the clog end F, thus causing the loom to be stopped at any point most
convenient to the weaver, which is effected by the setting of the cam K. Immedi-
ately the cam K forces the brake lever D) or the strip I against the brake pulley G
and the motion of the loom is arrested the cam K-by its sudden contact with
the brake lever re-bounds, which releases the brake lever from pressure and allows
of its being moved to work the loom by hand. When the spring starting handle P
is released and the brake lever D is under the brake pulley G, the said brake lever can
be swivelled as shown in dotted lines in Fig. 2 by raising the arm or lever N into the
upper slot R of the fixing O. In case the loom is started by operating the spring
handle P with the arm or lever N in the upper slot R of the fixing O, the arm or
lever N will by such action be transferred to the lower slot S, which is the correct
position to operate the brake when the starting handle P is released to stop the loom.
Fig. 5 is an arrangement wherein the arm J is adjustable to allow of the same being
set to the picking of the loom and to compensate for wear. To the arm J is attached
the adjustable piece J' by the bolt J, which can be set to be operated by the cam K
according to the point at which it is desired to stop the loom. If desired this adjust-
ment can be performed with the cam K constructed as shown in Figs. 1, 7, and 8.
The cam K, of which Fig. 7 is a sectional elevation through line A B₁ in Fig. 1, is
mounted on the disc K' keyed on the tappet shaft L. The face side of the cam 'K' is
provided with the radial slots T through which passes the bolts V secured in the
disc K as shown in Fig. 8, which is a section through line D' in Fig...
When it is desired to set the cam K in advance or otherwise it is effected by
simply releasing the nuts from the bolts V and swivelling it in the desired direction.
The cam K and the disc Kare provided with the serrations W fitting into each other
to prevent the cam K slipping when operating on the brake lever D.
Having now particularly described and ascertained the nature and object of our said
invention and in what manner the same is to be performed we 'declare that
what we claim is :-
.
1. The use construction and arrangement of brakes for looms operated-when in
position for stopping a loom-by a cain mounted on the tappet shaft so as to effect a
re-bound and release the brake after the loom is stopped to allow of the latter. being
worked by hand, with means of adjustment to automatically stop the "sley" in any
desired position after the starting handle has been released, substantially as described
and illustrated.
2. The combination of the swivelling brake lever :D and spring arm J or its

page_text: equivalent mounted on the fixing B by the centre E, the upright M, arm N, slotted
fixing O with the slots R and S on the starting handle P, and the cam K mounted on
the tappet shaft L, with the means of adjustment to automatically stop the loom in
any desired position, substantially as hereinbefore described and illustrated on th
drawings.
2000
EDMUND CHADWICK,
Agent.