IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1878

page_text: LETTERS PATENT to George Kirk, of Huddersfield, in the County of York.
Machine Maker, for the Invention of "IMPROVEMENTS IN LOOMS FOR WEAVING."
Sealed the 3rd September 1878, and dated the 5th March 1878.
PROVISIONAL SPECIFICATION left by the said George Kirk at the Office
of the Commissioners of Patents on the 5th March 1878.
GEORGE KIRK, of Huddersfield, in the County of York, Machine Maker.
"IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to looms in which rising and falling shuttle boxes are
employed, and the improvements consist. in the application of mechanism for
lowering the said shuttle boxes in a direct and positive manner without any sudden
jerk or stoppage. For this purpose I employ an upright rod, to which a constant
rising and falling motion is imparted by means of a cam fixed either on the crank
shaft or other convenient revolving part. On the upper end of this rod are notches
corresponding to the number of shuttle boxes. A short pendant arm is hinged to
the under side of the shuttle box lever, and by means of a bell-crank lever operated
preferably by the upright rod, the end of the pendant arm is placed over one of the
notches in the said rod. When the box lever is released the end of the pendant
arm enters one of the notches in the upright rod which bears the weight of the
shuttle boxes and supports them during their descent.
:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Kirk in the Great Seal Patent Office on the 5th September
1878.
GEORGE KIRK, of Huddersfield, in the County of York, Machine Maker.
"IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to looms in which rising and falling shuttle boxes are
employed; and the improvements consist in the application of mechanism for
lowering the said shuttle boxes in a direct and positive manner without any sudden
jerk or stoppage. For this purpose I employ an upright rod, to which a constant
rising and falling motion is imparted by means of a cam fixed either on the crank
shaft or other convenient revolving part. On the upper end of this rod are notchies
which vary in number according to the number of shuttle boxes." A short
pendant arm is hinged to the under side of the shuttle box lever, and by means
of a bell-crank lever operated preferably by the upright rod the end of the pendant
arm enters one of the notches in the upright rod which bears the weight of the
shuttle boxes and supports them during their descent.
In order that my Invention may be more fully understood, I herein give reference
to the accompanying Sheet of Drawings illustrative thereof.
The Drawing represents an end elevation of a "three-box" loom to which my
improvements are applied.
A is the upright rod to which a constant rising and fulling motion is imparted
by means of a cam B fixed on either the crank shaft C or on some other revolving
part of the loom. The cam B operates the rod A through the medium of the lever
D, provided with the aùtifriction pulley E.
To the rod A are fixed catches F, and to the shuttle box lever G'is hinged a
pendant arm H.
A bell-crank lever J working on a fulcrum pin fixed to the end frame operates
the pendant arm H in the following manner :-One end a of the bell-crank lever is
bent so as to come in contact with the rod A. as the latter rises, whereon the end b
of the bell-crank lever presses the arm H into one of the notches or steps F.
If the lever K, which supports the shuttle boxes, be removed from underneath
the pins M the whole of the weight of the shuttle boxes is transferred to the rod A
through the pendant arm H, and as the rod A falls the boxes will be lowered
without noise or jerk. When the weight of the boxes is removed from the pendant
arm it is pushed from its step or notch by the spring N.
We would have it understood that I do not confine myself to the precise details of
construction or arrangement herein shewn, nor to the manner of operating the
upright rod A or the bell-crank lever J, as other means may be readily devised for
effecting the same purpose, but what I claim as my Invention, and consider to bo
new, is the employment of apparatus for sustaining the shuttle boxes during their
descent, substantially as herein shown and described.
In witness whereof, I, the said George Kirk, have hereunto set my hand
and seal, this Fourth day of September, in the year of our Lord One
thousand eight hundred and seventy-eight.