Improvements in Looms and Jacquard Machines for the Manufacture of Tufted or Pile Fabrics.
Year: 1892

page_text: Date of Application, 9th Apr., 1892
Complete Specification Left, 9th Jan., 1893-Accepted, 11th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Looms and Jacquard Machines for the Manufacture
of Tufted or Pile Fabrics.
We, BRINTONS LIMITED of Kidderminster in the County of Worcester, Carpet
Manufacturers, and THOMAS GREENWOOD of The Shrubbery, Wolverley near
Kidderminster aforesaid Mechanic, do hereby declare the nature of this invention
to be as follows:-
This invention has special reference to the invention relating to the manufacture
of tufted or pile fabrics described in a former Specification No. 15680 of 1890 and
is intended to simplify the construction and improve the working of the machinery
described in the said Specification.
The said Specification described that each of the tuft yarn carriers was connected
by as many cords as there were varying degrees of lift (5 for a 6 frame carpet for
example) to a corresponding number of vertical wires of differential lengths by
means of which the varying degrees of lift required to bring the proper yarns in
line with the grippers were imparted in accordance with the operation or action of
the Jacquard mechanism as governed by the cards. It has been found in practice
more particularly when the number of "frames" is large, say 9 or more, that the
number of cords used to connect the carriers with the said vertical wires causes
considerable trouble and inconvenience. It is one object of the present invention
to dispense with these cords and this part of the invention consists in the novel
arrangement of mechanism about to be described whereby no cords are required.
The novel arrangement consists of a series of vertical wires the number of which
for each carrier is equal to the number of varying degrees of lift, these vertical
wires, which are regulated as described in the said former Specification by cross
needles governed in their horizontal movement by cards passing over a cylinder in
the usual way, are of differential lengths the differences in length being preferably
at their lower ends. These lower ends are slotted or formed into vertical loops of
corresponding differential lengths and these loops or slots engage with projections
or V- or other shaped recesses situated at different points of a lever to which a
single wire from the yarn carrier is connected. It will be readily understood that
when any particular vertical wire is selected by the cross needle and is consequently
lifted by the grid it will act at an earlier or later period of the lift upon the lever
according to the length of its loop or slot and therefore the extent to which the
lever and consequently the carrier are lifted will correspond. The required varying
vertical movements of the yarn carriers in accordance with the design or pattern
to be produced are thus obtained without the use of any cords. The lever has an
elongated hole or slot where it is pivotted in order to allow of its moving a little
end wise during its vertical movement. Instead of a lever, a bar can be employed
having a straight vertical motion.
6.
The said former Specification described that the carriers were formed with a
number of V-notches in connection with which was a reciprocating bar or plate
which by entering the notches corresponding with the lifts last effected ensured
correct register." It has been found in practice that owing chiefly to the large
number of carriers to be acted upon the reciprocating bar does not always act
readily if some of the carriers are a little too low and others a little too high. In
order to overcome this difficulty we substitute for the V- or double inclined notch
described in the former Specification a notch inclined at its lower side while the
upper side of the notch which is preferably horizontal is placed high enough to
allow the carrier to be lifted, which we purposely do, well above the "register"
position. When the carriers have been thus lifted, the reciprocating bar acts upon
the bottom inclines of the notches to bring down all the carriers to register."
66

page_text: No text detected.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Looms and Jacquard Machines for the Manufacture
of Tufted or Pile Fabrics.
We, BRINTONS LIMITED of Kidderminster in the County of Worcester Carpet
Manufacturers, and THOMAS GREENWOOD of The Shrubbery, Wolverley, near
Kidderminster aforesaid 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 :-
This invention has special reference to the invention relating to the manufacture
of tufted or pile fabrics described in a former Specification No. 15680 of 1890 and
is intended to simplify the construction and improve the working of the machinery
described in the said Specification.
The said Specification described that each of the tuft yarn carriers was connected
by as many cords as there were varying degrees of lift (5 for a 6 frame carpet for
example) to a corresponding number of vertical wires of differential lengths by
means of which the varying degrees of lift required to bring the proper yarus in
line with the grippers were imparted in accordance with the operation or action
of the Jacquard mechanism as governed by the cards. It has been found in
practice more particularly when the number of "frames" is large, say 9 or more,
that the number of cords used to connect the carriers with the said vertical wires
causes considerable trouble and inconvenience. It is one object of the present
invention to dispense with these cords and this part of the invention consists in
the novel arrangement of mechanism about to be described whereby no cords are
required. The novel arrangement consists of a series of vertical wires the number
of which for each carrier is equal to the number of varying degrees of lift; these
vertical wires, which are regulated as described in the said former Specification
by cross needles governed in their horizontal movement by cards passing over a
cylinder in the usual way, are of differential lengths, the differences in length
being preferably at their lower ends. These lower ends are slotted or formed
into vertical loops of corresponding differential lengths; and these loops or slots
engage with projections or V or other shaped recesses situated at different points
of a lever to which a single wire from the yarn carrier is connected. It will be
readily understood that when any particular vertical wire is selected by the cross
needle and is consequently lifted by the grid it will act at an earlier or later
period of the lift upon the lever according to the length of its loop or slot, and

page_text: therefore the extent to which the lever and consequently the carrier are lifted will
correspond. The required varying vertical movements of the yarn carriers in
accordance with the design or pattern to be produced are thus obtained without the
use of any cords. The lever has an elongated hole or slot where it is pivotted in
Instead
order to allow of its moving a little endwise during its vertical movement.
of a lever, a bar can be employed having straight vertical motion.
This part of the invention will be understood on reference to Figure 1 of the
annexed drawings in which a a represent the series of vertical wires the number of
which for each yarn carrier b is equal to the number of varying degrees of lift
required; these vertical wires which are regulated as described in the said former
Specification by cross needles c c governed in their horizontal movement by cards
passing over a cylinder d in the usual way are of differential lengths the differences
in length being at their lower ends. These ends are slotted or formed into vertical
loops ee of corresponding differential lengths, and these loops or slots engage with
projections ff situated at different points of a lever g pivoted at h to which a
single wire from the yarn carrier b is connected. When any particular vertical
wire a is selected by the cross needle c and is consequently lifted by the grid kit
will act at an earlier or later period of the lift upon the lever y according to the
length of its loop or slot e, and therefore the extent to which the lever g and
consequently the carrier b are lifted will correspond. Therefore the required varying
vertical movements of the yarn carriers in accordance with the design or pattern
to be produced are thus obtained without the use of any cords. is an elongated
hole or slot in the lever g where it is pivoted in order to allow of its moving a little
endwise during its vertical movement.
Figure 2 represents an arrangement in which instead of the lever shown in
Figure 1 we employ a horizontal bar baving a straight vertical movement. y is the
bar; a a are the vertical wires of differential lengths; they are passed through
vertical holes in the bar g and have loops similar to those marked e in Figure 1,
the lower ends of which when the wires à a are lifted through the operation of the
¡ is a single
jacquard catch against the underside of the bar y and lift the same.
wire connecting the middle of the bar g with the corresponding yarn carrier 6 80
that this carrier is more or less lifted according to the greater or less lift given to
the bar g by one or other of the wires a u. In order that the bar g may be raised
and lowered in a true vertical line and with little friction we form it with guide
legs g g which slide up and down between brackets g² g.
The said former Specification described that the carriers were formed with a
number of V-notches in connection with which was a reciprocating bar, plate or
blade which by entering the notches corresponding with the lifts last effected
ensured correct "register." It has been found in practice that owing chiefly to
the large number of carriers to be acted upon the reciprocating blade does not
always act readily if some of the carriers are a little too low and others a little too
high. In order to overcome this difficulty we substitute for the V or double inclined
notches described in the former Specification notches of the form shown at m in
Figures 1 and 2 that is to say inclined at the lower side, while the upper side which
is preferably horizontal is placed high enough to allow the carrier b to be lifted,
which we purposely do well above the "register" position. When the carriers
have been thus lifted, the reciprocating bladen acts upon the bottom inclines of the
Dotches to bring down all the carriers to "register." The blade n lies and moves
upon a block n
The present invention further consists in making the front edge of the yarn
carriers with a continuous longitudinal channel or recess into which the ends of the
tuft yarns project and which the grippers enter so as to take hold of the said ends.
This improvement will be understood on reference to Figures 3, 4 and 5 which are
respectively a side elevation, a front elevation, and a horizontal section of a portion
of one of the yarn carriers 6 on a larger scale than Figures 1 and 2. p represents
the continuous channel the main advantage of which is that if the Jacquard machine
should happen to get out of order and improperly move the carriers 6 up or down

page_text: when the grippers are in position to take the yarns, the continuous recess p allows
of the up or down movement, whereas if the recess were, as shown in our former
Specification not continuous, the parts would be liable to jam and something must
bend or break.
According to a further part of the present invention instead of the check springs
in the carriers bresting at their free ends in a sort of notch or seat shown in the
drawings forming part of the said former Specification which causes them to
produce a sort of scratching action on the yarns as these are pulled through, the
notch or seat is dispensed with and the free ends of the springs extend as shown
at q Figure 3 into the yarn holes which are made considerably larger. This
obviates the scratching action and the springs still act efficiently in preventing the
yarns from passing too freely through the holes and springing back after they
have been severed.
r
We are aware that it is not new to give differential lifts to the yarn carriers of a
loom for the manufacture of tufted or pile fabrics by attaching each yarn carrier
by a single cord to one end of a lever which receives differential lifts through the
operation of Jacquard mechanism and we make no claim to this per se, but hitherto
when such method has been employed the Jacquard mechanism has been caused to
act upon the levers through the intermediation of cords the number of which for
each lever is equal to the number of varying degrees of lift required in the lever,
and it is the chief object of our invention so far as it relates to operating the
carriers from the Jacquard mechanism to entirely dispense with cords, which when
used in such large numbers cause considerable trouble and inconvenience as we have
already herein stated.
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 in respect of looms of Jacquard machines for the manufacture of tufted or
pile fabrics is :-
1. For the purpose of giving the required differential lifts to the yarn carriers,
a series of vertical wires of differential lengths for each carrier the said wires
being worked by the jacquard and having slots or loops of corresponding differential
lengths to engage with projections or their equivalent at different points of a lever
to which a single wire from the yarn carrier is connected, all substantially as
described and illustrated in Figure 1 whereby the required varying vertical move-
ments of the yarn carriers in accordance with the design or pattern to be produced
are obtained without the use of any cords.
2. For the purpose of giving the required differential lifts to the yarn carriers, a
series of vertical wires of differential lengths for each carrier the said wires being
worked by the jacquard and having slots or loops of corresponding differential
lengths to engage at different points of a bar which is free to move in a true
vertical line and to which a single wire from the yarn carrier is connected, all
substantially as described with reference to Figure 2 whereby the required varying
vertical movements of the yarn carriers in accordance with the design or pattern to
be produced are obtained without the use of any cords.
3. The improved form of notch m in the yarn carriers for the purpose set
forth.
4. The continuous longitudinal recess or channel p in the front edge of the yarn
carriers for the purpose set forth.
5. The check springs 9 made to extend into the yarn holes r of the carriers,
these yarn
holes being made without a seat or notch for the free ends of the springs,
as and for the purpose set forth.
Dated this 9th day of January 1202
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.