Improvements in Double-lift Jacquard Machines.
Year: 1893

page_text: Date of Application, 17th May. 1893
Complete Specification Left, 17th Feb., 1894-Accepted, 17th Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Double-lift Jacquard Machines.
I, WILLIAM HARDAKER of Cross Lane, Great Horton, Bradford, Jacquard
Machine Maker do hereby declare the nature of this invention to be as follows:-
-
My object is to convert the ordinary double-lift machine into an open shed
machine by causing the hook to which the neck-cord is attached to dwell at the
highest or lowest point as long as required for the formation of the desired
pattern.
1-accomplish-this-by-using,three-lifting books. Two of these are of the usual
The third is
form, and acted upon by the needles and griffe in the usual manner.
placed between the other two. This third hook is longer than the others and has
near the lower extremity a species of cross-head, and below that a flat bar, or a
loop, to which the neck-cord is attached, whilst the other two have nothing
attached to them. The method of actuating the harness is as follows:-The two
outside hooks have a long loop formed at their lower extremity which is passed
through a groove in the bottom-board of the machine, and so placed that the top of
the loop comes under the cross-head of the middle hook, so that when either of the
two outside hooks is lifted the middle hook, with the neck-cord attached will be
lifted also. Above the cross-wires I place a stationary griffe or resting bars, so
that when the middle hook is lifted it may be deposited on the resting bars and
remain as long as required. So as to ensure this hook being released when required
I pass all the three hooks through loops in the cross wire so that they are all acted
upon in the same manner, and at the same time. So as to ensure the hooks keeping
their places in relation to each other I employ, by preference, an iron plate for the
bottom-board of the machine and cut suitable slots or holes for the hooks to pass
through. The two outside hooks I strengthen at the top of the loop by a cross
piece, or other suitable means so as to enable them to lift the middle hook without
bending or springing. By this arrangement the three hooks are all separate and
easily removed if desired and I obtain increased speed and économy of working.
Dated this 15th day of May 1893.
COMPLETE SPECIFICATION.
Improvements in Double-lift Jacquard Machines.
I, WILLIAM HARDAKER of Cross Lane, Great Horton, Bradford, Jacquard
Machine Maker, 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 -
My object is to convert the ordinary double lift machine into an open shed
machine by causing the hook to which the neck cord is attached to dwell at the
highest or lowest point as long as required for the formation of the desired pattern.
I accomplish this by using three lifting hooks. Two of these are of the usual form
The third hook
and are acted upon by the needles and griffe in the usual manner.
is placed between the other two and has near the lower extremity a species of cross
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page_text: head, and below that a flat bar, or a loop, to which the neck-cord is attached,
whilst the other two have nothing attached to them.
The method of actuating the harness is as follows:-The two outside hooks have a
long loop formed at their lower extremity which is passed through a groove or slot in
the bottom board" of the machine, and so placed that the top of the loop comes under
the cross-head of the middle hook, so that when either of the two outside hooks is
lifted the middle hook with the neck-cord attached will be lifted also. Above the
cross-wires, or needles, I place a stationary griffe or resting bars, so that when the
middle hook is lifted it may be deposited on the resting bars and remain as long as
required.
So as to ensure the hook being released when required I pass all the three
hooks through loops or notches formed in the cross-wire so that they are all acted
upon in the same manner and at the same time. So as to ensure the hooks keeping
their places in relation to each other I employ, by preference, an iron plate for
the bottom board of the machine, and cut suitable slots or holes for the loops on the
lower part of the hooks to pass through.. The two outside hooks I strengthen at
the top of the loop by a cross piece, shoulder, or other suitable means, so as to
enable them to lift the middle hook without bending or springing.
And in order that my invention may be understood I proceed to describe the
accompanying drawings.
Fig. 1 is a section of the machine showing the hooks and crosswires in position.
A. A and A2 are the three hooks, A. being longer than A1 and A2 and having
the hook at the top above them, and the neck cord attached to the bottom. The
cross-head upon the hook A. is shown at H. and resting upon the top of the loops
formed on the lower parts of A1 and A2. The bottom board of the machine is
shown in section at E. Above the hooks and crosswires is placed the resting griffe
or bars B. C and C¹ being the ordinary lifting griffes, and G. G. the spindles
upon which they slide.
Fig. 2 is a plan of the crosswire showing the notches in which the upright hooks
are placed.
Fig. 3 shows a longitudinal and Fig. 4 a transverse section of the cross-head
on A.
The needles D are acted upon by the cards and the lifting griffes C. C¹ raise or
lower the hooks A' and A2 in the usual manner, and by the arrangement and
position of the crosshead H. on the wire A. and the loops on A1 and A2 whichever of
the latter is raised. The hook A must also be raised with it and unless struck
back by the next card will be deposited on the resting bars B. and so long as holes
are cut in the card corresponding with the needle acting upon that hook it will
remain upon the resting bar: but whenever a card comes up without a hole corre-
sponding to the needle the hook will be struck back and will be brought down to
the lowest point by the then descending griffe and will remain there as long as
required for the formation of the pattern as indicated by the next hole occurring in
a card, so that by this means the warp is held at the highest or lowest point as long
as required for the pattern being woven instead of being carried up and down in the
ordinary manner.
To economise space in the machine and also in consequence of the hook A¹
having its loop turned in the opposite direction to those on A' and A² so as to
bring it under the crosshead on A, the first and second loops or notches on the
crosswire are much nearer together than are the second and third, as shown at
Fig. 2. To prevent slipping, and to ensure the hook A being lifted by A¹ or A2
I form a V shaped groove on the under side of the crosshead H. as shown in Fig. 4,
and to assist this I may cause the said groove to rise towards the centre of the
cross head as shown by the dotted line in Fig. 3.
By preference I form the hook at the top of the upright wires A. A¹ and A' as
shown in the drawing: those upon A' and A² being carried upright to the point of
bending, and those upon A being bent forward near the top, as shown, to facilitate
the passing between the resting knives, or bars, without striking those behind them.

page_text: This is more especially the case where a shallow shed is required, as in narrow
looms, but in broad looms, or where there is a deep shed, or lift, I may overcome
any difficulty by using deeper knives.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. The arrangement of three separate and distinct hooks for the purpose of
raising the harness and keeping it in position in the manner described, and each or
any of such hooks being capable of being removed without interfering with the
others.
2nd. The use of the cross-head of the form and in the manner described on the
middle look, and the loops on the side hooks, as and for the purpose herein
described.
3rd. The special form of the bottom board of the machine, and
4th. The combination of the several parts as and for the purpose herein set
forth and described.-
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