Improvements in Jacquard Machines used in Looms for Weaving.
Year: 1890

page_text: Date of Application, 14th May, 1890
Complete Specification Left, 14th Feb., 1891-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Jacquard Machines used in Looms for Weaving.
We, JOHN SUGDEN, of 28, Holmfield Cottages, Holmfield, near Halifax,
Weaving Manager, and WILLIAM HARDAKER, of Cross Lane, Great Horton,
Bradford, Jacquard Machine Maker, do hereby declare the nature of this invention
to be as follows:-
In the ordinary machine of what is known as the single lift type there are
upright hooks for actuating the harness, and these hooks are operated upon by,
first, the cards through crosswires or needles for the purpose of selecting such of
the said hooks as are required to be raised for the formation of the pattern on the
fabric. It frequently happens that the same hook may have to be raised for a
number of times in succession so that consecutive picks of weft may pass under
the same warp threads. In such cases there is of necessity great loss of power.
The object of this invention is to keep such of the lifting hooks, and the harness
attached to them, in the raised position for such a length of time as may be
required for a sufficient number of weft picks to be passed under the warp
threads for the formation of the desired pattern. To accomplish this we form a
second hook or loop at any convenient point between the hook at the top
extremity of the upright and that at the bottom to which the neck cord is
attached. The hook at the top extremity we use in the usual manner for
raising or depressing the harness by means of the lifting knives or griffe. At a
convenient point in relation to the lower hook we place a series of resting knives,
which may be stationary or movable so that when the ordinary griffe has raised the
hooks to form a shed, such as are required to remain up for more than one pick are
deposited upon these resting knives. So long as there are holes in the cards the
hooks corresponding to such holes will remain upon the resting knives and so allow
the weft to pass under the warp threads raised by them; but when they are
required to be depressed, the needles, in consequence of there being no hole in the
card, will press them back clear of the resting knives and they are deposited upon
the knives of the griffe and brought down in the usual manner of a single lift
jacquard machine.
At each upward movement of the lifting griffe all the hooks which are resting
upon the rest knives are raised just sufficient to be clear of such knives so as to
facilitate their being pushed back if it is required that they should be brought
down.
By special arrangement of mechanism we time the movement of the card-cylinder
so as to facilitate the release of the hooks from the rest knives and relieve the.
cards of any undue pressure which would otherwise be thrown upon them.
We are aware that such double hooks as herein described have been employed
before, but in connection with double lift machines, but our invention consists in the
novel method of employing them in the single lift machine and we claim that we
thereby secure greater economy and efficiency.
Dated this 10th d
SM 1900
JOHN SUGDEN.
WILLIAM HARDAKER.

page_text: f
COMPLETE SPECIEICATION
Improvements in Jacquard Machines used in Looms for Weaving.
We, JOHN SUGDEN; Weaving Manager, of 28; Holmfield Cottages, Holmfield,
near Halifax, and WILLIAM HARDAKER, Jacquard Machine Maker, of Cross
Lane, Great Horton, Bradford, 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:—
In the ordinary machine of what is known as the single lift type there are
upright hooks for actuating the harness, and these hooks are operated upon by
the cards for the purpose of selecting such of the said hooks as are required to
be raised for the formation of the pattern on the fabric. It frequently happens
that the same hook, may have to be raised for a number of times in succession,
so that consecutive weft picks may pass under the same warp threads. In such
cases there is, of necessity, great loss of power. The object of this invention is
to keep such of the lifting hooks, and the harness attached to them in the raised
position for such a length of time as may be required for a sufficient number of
weft picks to be passed under them for the formation of the desired pattern.
To accomplish this we form a second hook or loop at any convenient point
between the hook at the top extremity of the upright and that at the bottom
to which the neck-cord is attached. The hook at the top extremity we use in
the usual manner for raising or depressing the harness by means of the lifting
knife or griffe. At a convenient point in relation to the lower hook we place
a series of resting knives which may be stationary or moveable, so that when
the ordinary griffe has raised the hooks to form a shed, such as are required
to remain up for more than one pick of weft are deposited upon these resting
knives. So long as there are holes in the cards the hooks corresponding to such
holes will remain upon the resting knives and so allow the weft to pass under
the warp threads raised by them: but when they are required to be depressed
the needles, in consequence of their being no hole in the card, will press them
back clear of the resting knives and they are deposited upon the knives of the
griffe and brought down in the usual manner of a single lift jacquard machine.
At each upward movement of the lifting griffe all the hooks which are resting
upon the rest knives are raised just sufficient to be clear of such knives so as
to facilitate their being pushed back if it is required that they should be brought
down.
By special arrangement of mechanism we time the movement of the card-
cylinder so as to facilitate the release of the hooks from the rest knives and
relieve the cards of any undue pressure which would otherwise be thrown upon
them.
And in order that our invention may be understood we proceed to describe the
accompanying drawings as follows:-
:―
Fig. 1 represents a section of an ordinary jacquard machine with our invention
added. A is the lifting griffe or knives. B the upright hooks and the lower
hook or loop formed upon the upright. C is the resting griffe or bars. The
needles E act upon the upright hooks when pressed back by the card upon the
card-cylinder D so that if there is a hole in the card the hook will be raised by the
griffe A and be deposited upon the resting bar C, but if when the lifting griffe A-
is about to descend the hook is pressed back by the needle clear of the resting
bar C, then such hook will descend with the griffe.
For the purpose of ensuring proper selection of the hooks we cause the card-
cylinder to remain in contact with the needles for a longer period than is usual in
ordinary jacquards, that is to say, when the griffe A reaches its highest point all
the hooks which have been raised are lifted just clear of the resting bars. At that
moment we bring the card cylinder, and with it the pattern card in contact with

page_text: the needle points for the purpose of indicating which hooks must be raised or
depressed for the next pick to pass between such warp threads as are actuated by
them. As the griffe descends it brings with it such hooks as are required to be
depressed. We now keep the card cylinder in contact with the needles until the
griffe has reached the lowest point, deposited such hooks as it has brought down
with it and returned sufficiently far to catch hold of the hooks the card has indicated
to rise, which it now carries with it, thus completing the shed of warp threads for
the next pick to pass through.
The manner in which we keep the card-cylinder in contact with the needles for
the required length of time is, by preference, to substitute for the ordinary
eccentric on the driving shaft of the loom which actuates the card-cylinder motion
a tappet or grooved cam F which is so constructed that acting upon the lever G,
or such similar contrivance, motion is communicated to the card-cylinder through
the usual rods and levers as shown, and the requisite pause given to the cylinder
when the card is in contact with the needles. To facilitate the release of the
hooks we may move the griffe C from side to side in grooves by means of a lever
from the lifting griffe A.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what we
claim is:-
+
66
1st. A positive "dwell up or open shed" motion for single lift jacquards.
2nd. The use of the hooks formed as herein described and the resting bars in
single lift machines.
3rd. The means or method of keeping the card-cylinder in contact with the
needles for a sufficient length of time, as and for the purpose herein described.
4th. The combination and arrangement of parts as set forth and described for a
"dwell up
*
or open shed" jacquard.
"
Dated this 12th day of February 1801
THOS. R. ASHENHURST,
71, Ashgrove, Bradford, Agent.