Improved Mechanism for Checking the Shuttles of Power Looms.
Year: 1890

page_text: Date of Application, 27th Feb., 1890-Accepted, 29th Mar., 1890
COMPLETE SPECIFICATION.
Improved Mechanism for Checking the Shuttles of Power Looms.
We GEORGE THOMSON of Woodhouse Mills, Woollen Manufacturer, and JOHN
HAMPSHIRE of Deighton, Weaving overlooker both of Huddersfield in the County of
York do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the following
statement :-
The object of this invention is to relieve or diminish the shock caused by the
momentum of the shuttle of a power loom at each end of its traverse or pick, and is
chiefly applicable to under pick looms.
To carry out our invention we connect the two picking arms by means of straps
which are looped upon the arms and are connected by means of a wire or rod
provided with one or more screw couplings which are employed in the adjustment
of the tension between the picking arms above the fulcrum.
The wire or rod above mentioned and hereinafter referred to as the check wire is
strained sufficiently by tightening the screw coupling so as to cause the picking
arms when at rest to be drawn a slight distance towards the centre line of the
loom, in order that when either of the pickers is struck by the shuttle a small space
is left in which the picker springs back.
The loops by means of which each check wire is attached to the picking arms are
on one side of the loom placed above the fulcrum or bolt upon which the picking
arm is hinged, and on the other side below it, so that in the act of striking the
shuttle the lower part of the picking arm below the fulcrum moves outward, and
thereby tightens the check wire, drawing the non-striking picking arm inwards a
short distance, in which position it receives the shock of the shuttle upon the picker,
and thereby cushions or buffers the blow.
In order to enable our invention to be fully understood we will proceed to describe
the same with reference to the accompanying drawing; in which the picker arms of
an under-pick loom are represented at A A and the picker straps by which the arms
are actuated at B B, the brackets upon which the picker arms are mounted at CC.
The rod and springs D D bring the picker arms back into striking position after each
pick.
The straps by means of which the rod or wire of our improved check motion is
connected to the picking arms are represented at E E, the screw couplings by which
the tension of the check wire is adjusted or the distance which the picking arms are
drawn inward is regulated, are represented at F F, and the check wire or rod
which forms a connecting link across the loom between the two picking arms is
represented at G.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is,
1. For the purpose of checking or diminishing the force of the blow given by the
shuttles of power looms at each end of their traverse or pick, a connecting wire or
rod, provided with screw couplings for adjustment, each wire being attached to a
picking arm by means of a strap and loop of leather upon one side of the loom above.
the fulcrum upon which the picking arm is hinged, and the same wire is connected
to the picking arm upon the other side of the loom below the fulcrum substantially
in the inanner described, and as represented in the accompanying drawing.
2. In a check motion for the shuttles of looms the combination of the check-wire
or rod, the screw couplings, and the straps and loops of leather, with the picking

page_text: arms and the springs for returning the arms into their striking position, ali con-
structed and operating substantially in the manner herein described, and as represented
in the accompanying drawing.
3. The general arrangement of the various parts comprising a check motion for
the shuttles of power looms, substantially in the manner and for the purpose herein
described and represented in the accompanying drawing.
Dated this 25th day of February 1890.
WILLIAM JAMES BAKER,
2, New Street, Huddersfield, Agent for the Applicants.