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

page_text: Date of Application, 13th Sept., 1890
Complete Specification Left. 13th June, 1891-Accepted, 22nd Aug., 1991
PROVISIONAL SPECIFICATION.
Improvements in Jacquard Machines used in Looms for Weaving.
We ABRAHAM FLATHER of 18 Laistridge Lane Bradford, WILSON FLATHER,
46 Laistridge Lane Bradford Machine Makers, and DAVID WRIGHT 5 Quaker
Terrace, Little Horton, Bradford Mechanic, do hereby declare the nature of this
invention to be as follows:-
Our improvement consists in so arranging the working parts of an ordinary
double lift Jacquard machine that such of the upright looks as are raised and
require to be kept in the raised position to form the upper part of the shed and
pattern are so kept as long as necessary without being depressed and re-lifted at
each succeeding pick as has hitherto been the case.
To accomplish this we employ special forms of lifting hooks, and resting bars or
grates. We employ two separate lifting hooks to each neck of the harness, and
these we connect with the neck by separate neck cords in the usual manner, or by
wire links or loops, or any suitable arrangement.
By preference we make our lifting hooks with the usual formation at the top
extremity, and near the lower extremity we form a suitable hook or loop to rest
upon a rod on the bottom board of the machine. At a suitable point between the
crosswires or needles and the bottom board we form a loop or bend on the upright
wires. Between the bottom board and needles we place a stationary grid, or set
of knives, of a suitable form and at a distance from the bottom board corre-
sponding with the depth of the shed, upon which the hooks may rest when
required.
By this arrangement the hooks or uprights are lifted in the same manner as in
ordinary double lift machines when there are holes in the cards corresponding
with the needles actuating such hooks, and the projection, herein before mentioned,
upon the upright is brought over the knife of the stationary grid and deposited
upon it.
Whenever there is a hole in the card the corresponding hook remains
in the position described, but when there is no hole the hook is struck back and
descends to the lower resting bar in the same manner as in ordinary double lifts.
Dated this 12th day of September 1890.
THOS. R. ASHENHURST,
71, Ashgrove, Bradford, Agent.
COMPLETE SPECIFICATION.
Improvements in Jacquard Machines used in Looms for Weaving.
We ABRAHAM FLATHER of 18 Laistridge Lane Bradford, WILSON FLATHER
of 46 Laistridge Lane Bradford, Machine Makers, and DAVID WRIGHT of
5 Quaker Terrace Little Horton, Bradford, Mechanic, 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 :-
Our improvement consists in so arranging the working parts of an ordinary
double lift Jacquard machine that such of the upright hooks as are raised and
required to be kept in the raised position to form the upper part of the shed and
pattern are so kept as long as necessary without being depressed and re-lifted at
each succeeding pick as has hitherto been the case.
To accomplish this we employ special forms of lifting hooks, and resting bars

page_text: or grates. We employ two separate lifting hooks to each neck of the harness,
and these we connect with the neck by separate neck cords in the usual manner
or by wire links or loops, or any suitable arrangement.
By preference we make our lifting hooks with the usual formation at the top
extremity, and near the lower extremity we form a suitable hook or loop to rest
upon a rod on the bottom board of the machine. At a suitable point between the
crosswires or needles and the bottom board we form a loop or bend on the upright
wires. Between the bottom board and needles we place a stationary grid or set
of knives of a suitable form and at a distance from the bottom board corre-
sponding with the depth of shed required, upon which the hooks herein before
described may rest when required.
'
By this arrangement the hooks or uprights are lifted in the same manner as in
ordinary double lift machines, and when there are holes in the cards corresponding
with the needles actuating such hooks the projections upon the uprights, herein-
before mentioned, are brought over the knives of the stationary grid and deposited
upon it.
Whenever there is a hole in the card the corresponding hook remains
in the position described, but when there is no hole the hook is struck back and
descends to the lower resting bar in the same manner as in ordinary double-lift
machines.
And in order that our invention may be understood we proceed to describe it,
and by reference to the acccompanying drawings as follows:-
Fig. 1 is a section of an ordinary double lift Jacquard machine with our
improvement applied.
A. A are the lifting griffes of the usual form. B. B. B. B. are the lifting hooks
upon which loops b. b. b. b. are formed as hereinbefore described, between the
lower extremity and the crosswires. c is a long loop formed at the bottom, and
through which the rod or bar d is passed, so that the upright may rest upon it
when at its lowest point.
C is the stationary grid placed at a convenient point for the hooks to rest upon
when at-their highest point.
The hooks are actuated in the usual manner by the cards and needles or crosswires.
Any hook having been raised by the griffe will, if there is a hole in the succeeding
card, be deposited by the loop or hook b. on the resting knives C. and will remain
there as long as holes in the card indicate that it should remain in the raised
position but should there be no hole in the card the hook will be struck back and
brought down by the griffe in the same manner as in the ordinary double lift
jacquard.
To ensure the proper action of the cards upon the hooks we employ a specially
formed cam F, Fig. 2, in place of the eccentric commonly used for actuating the
card cylinder, and we communicate motion from this cam by means of the lever G.
and connecting rod H.
The cam is so formed that it keeps the card in contact with the needles a
sufficient length of time for the griffe to descend to a point which would bring
the loop or hook b. below the knives C. and thus ensure that all which are not
intended to remain up shall have the loop b. pressed clear of the knives C, until
there is no risk of their being caught upon the knives, and at the same time ensure
that all which are intended to remain up shall do so.
We may connect the upright hooks to the harness by means of the wire link'D.
Fig. 1. and use one neck cord only, or by two neck cords in the usual manner as
shown at E Fig. 1.
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 :-
1st. The arrangement and form of upright hook and stationary griffe, as and for
the purpose herein described

page_text: 2nd. The form of cam actuating the card cylinder so as to keep the cards in
contact with the needles as and for the purpose described, and in combination with
the parts described and set forth.
3rd. The arrangement and combination of the several parts herein set forth as
applied to an ordinary double lift Jacquard machine.
Dated this 12th day of June 1891.
THOS. R. ASHENHURST,
71, Ashgrove, Bradford, Agent.