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

page_text: Date of Application, 11th Aug., 1890
Complete Specification Left, 11th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Jacquard Machines used in
Looms for Weaving.
We WILLIAM FIELDING and HENRY ARTHUR FIELDING both of Sycamore
Street Oldham Road Manchester in the County of Lancaster Jacquard Machine
Manufacturers, do hereby declare the nature of this invention to be as
follows:-
The first part of our invention consists in an improved Jacquard machine for
weaving goods known in the trade as figured lenos, in which the fabric is partly
leno or cross weaving and partly plain cloth either with or without a floated figure
or design.
In this class of weaving a triple harness is generally employed, the front
portion being the "doup" harness, the middle portion the figuring harness and the
back portion the slackening harness.
The slackening harness is used for slackening those warp threads which are
lifted by the "doups" and is generally lifted about half the distance that the
doup and middle harnesses are raised, that distance being found sufficient to
give the necessary slackness.
$6
The usual method of working the slackening harness so as to procure the
requisite lift has been to connect a lever to the bottom of each of the jacquard
hooks and to attach the harness at or near the centre of each lever thereby
reducing the lift to about one half the usual distance.
Our improved machine dispenses with the said levers whilst producing the same
result, and is constructed with two "griffs," one larger than the other; the large
one lifts the "
doup" and middle harnesses and the small one lifts the slackening
harness. The large "griff" is lifted by an ordinary lifting-lever actuated by the
loom shaft, the link connecting the lifting-lever with this "griff" being connected
also to a short lever (running at right angles to the lifting lever) attached to the
small "griff" the other end of this short lever being attached to the framework of
the machine or other convenient place as a fulcrum, the fulcrum being placed at a
suitable distance for giving the desired lift to the small "griff."
The second part of our invention relates to a turn back motion for reversing the
cylinder when required.
The apparatus consists of a sliding bar working between two guides, arranged
on the front of a clamp bracket, attached to the batten of a Jacquard machine by
means of a bolt or set screw; a spring to withdraw the bar, and a pin to hold the
bar in position.
The sliding bar is formed with a hook to come in contact with the end of the
cylinder of a Jacquard machine on which is placed a lantern (so called) whereby
the said cylinder may be made to rotate backwards on its centre by means of the
said sliding bar.
The sliding bar has a spiral or other suitable spring attached to the back part,
and also secured to a projection on the clamp bracket whereby the said bar may be
lifted up, thus leaving the cylinder free to rotate in the forward direction.
The sliding bar has also projections on the back part, moving within the guides,
in connection with other projections arranged on the clamp bracket, which give a
backward and forward motion to the hook part of the sliding bar, in order that
when drawing down the lever, the hook comes in contact with the lantern and turns
the cylinder backwards and in returning by means of the spring it is taken up
(i.e. the sliding lever) out of the way of the lantern, the cylinder being left free
to rotate in a forward direction.

page_text: This turn back motion may be applied also to any ordinary Jacquard machines
as well as to the improved leno jacquard.
Dated this 9th day of August 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Construction of Jacquard Machines used in
Looms for Weaving.
We WILLIAM FIELDING and HENRY ARTHUR FIELDING both of Sycamore
Street Oldham Road Manchester in the County of Lancaster Jacquard Machine
Manufacturers, 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 first part of our invention consists in an improved Jacquard machine for
weaving goods known in the trade as figured lenos, in which the fabric is partly
leno or cross weaving and partly plain cloth either with or without a floated
figure or design.
In this class of weaving, a tripple harness is generally employed, the front
portion being the "doup" harness, the middle portion the figuring harness and the
back portion the slackening harness.
The slackening harness is used for slackening those warp threads which are
lifted by the "doups" and is generally lifted about half the distance that the
doup and middle harnesses are raised, that distance being found sufficient to
give the necessary slackness.
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The usual method of working the slackening harness so as to procure the
requisite lift has been to connect a lever to the bottom of each of the jacquard
hooks and to attach the harness at or near the centre of each lever thereby
reducing the lift to about one half the usual distance.
Our improved machine dispenses with the said levers whilst producing the same
result.
The nature of our said invention will be readily understood on reference to the
two sheets of drawings hereunto annexed, marked with figures and letters of
reference corresponding with those in the following explanation thereof.
Lifting the "
Sheet 1. illustrates the first part of our invention, Fig. 1 being an elevation
(partly in section) of so much of a Jacquard machine as is necessary to illustrate
The machine is constructed
our invention, and Fig. 2 a plan view of the same.
with two "griffs" a and the one a
doup" and middle harnesses and
the other lifting the slackening harness.
The figure griff" is lifted by an ordinary lifting levere actuated by the
loom shaft, the link & which connects the lifting-lever c with this "griff" a being
connected also to a short levere (running at right angles to the said "griff" lifting
lever) and attached by a link to the "griff the other end of this short lever
being attached by a bracket g to the framework of the machine or other convenient
place as a fulcrum, the fulcrum being placed at a suitable distance for giving the
desired lift to the slackening "griff", this fulcrum being adjustable in a slot. in
the bracket y so as to give more or less lift to the slackening "griff" according
to requirements as shown by the dotted centre lines at Fig. 1.
"
Fig. 3 is a plan view of a slight modification of the above wherein two levers e
(one at each side of the machine) are employed, instead of one only to work the
slackening griff" b, the levers e being connected to the " figure griff" a at ex
instead of to the link d.
The second part of our invention relates to a turn back motion for reversing
the cylinder when required and is illustrated on Sheet of the drawings, Fig. 4.

page_text: being a sectional elevation, Fig. 5. a partial front view and Fig. 6. a similar view
of a slight modification thereof.
The apparatus consists of a sliding bar i working between two guides & arranged
on the front of a clamp bracket which is attached to the batten of a Jacquard
machine by means of a bolt or set screw; a spring m to withdraw the bar i and a
pin n to hold the bar i in position.
"
The sliding bar i is formed with a hook j to come in contact with the end o of
the cylinder of a Jacquard machine on which is placed a lantern p (so called)
whereby the said cylinder o may be made to rotate backwards on its centre by
means of the said sliding bar i.
The sliding bar i has a spiral or other suitable spring m attached to it and also
secured to a projection 7 on the clamp bracket / or batten s whereby the said bar i
may be lifted up, thus leaving the cylinder o free to rotate in the forward
direction.
The sliding bar i has also projections t moving within the guides & in connection
with other projections u arranged in the clamp bracket which give a backward
and forward motion to the hook part of the sliding bar in order that when
drawing down the lever or bar i the hook comes in contact with the lantern P
and turns the cylinder o backwards and in returning by means of the spring mit is
taken up (ie. the sliding lever ) out of the way of the lantern p, the cylinder o
being left free to rotate in a forward direction.
In the modification shown at Fig. 6 the sliding bar i is made shorter and the
hooked part instead of being made of one piece with it is hinged to its lower
end.
This turn back motion may be applied also to any ordinary Jacquard machines
as well as to the improved leno jacquard.
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 :-
First. The combination in a Jacquard machine for weaving figured lenos, of
two griffs, one for the pattern and doup harness and the other for the slackening
harness, the former being lifted direct by the ordinary lifting lever or levers and the
latter by an adjustable cross lever (or levers) connected thereto, substantially in the
manner and for the purpose described and illustrated by Sheet 1. of the drawings
annexed, and
Secondly. We claim in a Jacquard machine the novel construction and arrange-
ment of the "turn-back" motion for reversing the cylinder when required
substantially as hereinbefore described and illustrated by Sheet 2 of the said
drawings.
Dated this 9th day of May 1891.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.