Improvements in Jacquard Machines.
Year: 1891

page_text: Date of Application, 28th Sept., 1891
Complete Specification Left, 24th Dec., 1891-Accepted, 30th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Jacquard Machines.
I, RUDOLF BECK of Lazzenhof, Vienna I Austria, Manufacturer, do hereby
declare the nature of this invention to be as follows:-
This invention has reference to improvements in Jacquard machines of the kind
which work with two cylinders, one at the front and the other at the rear, in such
a manner that both cylinders act in the same horizontal plane on one and the same
system of hooks; and it has for object to allow of the use with the rear cylinder of
cards that are perforated identically with those for the front cylinder or are
reversely perforated. If the cards for the rear cylinder are the reverse of those for
the front cylinder, then upon each needle of the Jacquard apparatus there are
mounted two springs between which is arranged a horizontally movable spring box
by means of which one or other of the springs on each needle is compressed, so that
the needles will be operated by that cylinder which is at the side nearest the springs
that are compressed.
The horizontal movement of the spring box can be effected by means of lever
mechanism from the rear cylinder in such a manner that when this cylinder is
thrown out that is to say, is inactive, the spring box will be pushed towards the
front cylinder which is then being thrown in so that the springs nearest this
cylinder will be compressed and the needles prepared for the blow of this cylinder
before the same arrives in its thrown in position.
In many cases it is advantageous to employ identically perforated cards for both
cylinders, so as to render it possible for both cylinders to work in exactly the same
manner upon the hooks. In this case the needles instead of being each made in one
piece extending from the front needle board to the rear needle board, is made in
two parts, one of which is hereinafter called for distinction the needle proper and
works in conjunction with the front cylinder, whilst the other is hereinafter called
the counter needle and works in conjunction with the rear cylinder. Between the
two parts of the several needles, there is arranged a movable device comprising a
number of two-armed catch-hook levers one between the two parts of each needle.
The arrangement is such that so long as the rear cylinder out of operation the
said device cannot act upon the needles proper, so that the front cylinder works as
in the ordinary one-cylinder Jacquard machines. But if the rear cylinder comes
into operation, the catch hook levers (corresponding to the pushed back counter
needles) will fall into loops attached to the needles proper and will afterwards draw
these needles so far back that the corresponding hooks will be placed obliquely,
and therefore will not be lifted by the griffe. Consequently all the hooks the
corresponding counter needles of which strike against full places in the cards of the
rear cylinder, will be moved into an oblique position and will therefore be pushed
back by the griffe bars; whilst all hooks will remain at rest or upright the counter
needles of which pass through perforations in these cards. Thus similar cards or
similar places in the cards of both cylinders have the same action upon the hooks.
In this case it is advantageous to effect the movement of the catch hook
mechanism by means of the griffe. For this purpose the catch-hook levers are
mounted on pins supported at their ends in blocks or cheeks capable of horizontal
movement and provided with tappets which together with the catch hook mechanism
are moved in the direction of the counter needles by projections fixed to the griffe.
When the projections release the tappets, suitable springs serve to bring the catch-
hook mechanism back into its initial position.
To enable the two cylinders to work simultaneously, the catch hook mechanism
is fixed in the position into which it is moved towards the rear cylinder and the

page_text: front cylinder is thrown out before the griffe bars meet the hooks. This can be
effected by suitably shaping the loop fixed to the batten of this cylinder.
When a needle proper and the corresponding counter needle are pushed back or
inward simultaneously by the blow of their respective cylinders, the corresponding
hook will be held by the catch hook mechanism in the oblique position into which
it is moved by the needle proper. But if the needle proper only be pressed back,
whilst the counter needle remains at rest, the hook will be first caused to assume
an oblique position but since the front cylinder is thrown out before the corre-
sponding griffe bar can meet the hook, and the catch hook mechanism remains
inoperative, the hook will return into its upright position and thus be carried up by
the griffe. The same takes place with hooks the needles proper of which are not
pushed back, but the counter needles of which are pushed back.
Whereas in the alternate working of the two cylinders of which the front one,
for instance, contains the suitably perforated cards serving for lifting out the design
or figure embroidering set, and the rear one contains the cards which serve to lift
out the ground (ground set), a two-shuttle half-silk fabric can be produced, the
ground weft of which is generally cotton, and the design or figure weft of which is
generally silk, there can be produced with simultaneous working of both cylinders
with the same cards as before, a single-shuttle (whole silk) fabric. This result
follows from the fact that in the simultaneous working of both cylinders, as can be
seen from the mode of working above described, the two chains or sets of cards of
the cylinders complement each other in such a manner that to the liftings produced
by the front cylinder or the cards of the same, and not affected by the catch hook
mechanism from the rear, there are added liftings which are produced by the cards
of the rear cylinder. It is therefore not necessary to perforate fresh cards.
All the movements necessary in the Jacquard machine can be derived from a
single lever actuated by hand or by a power shaft. By the movement of this lever-
1) the griffe is raised as heretofore; 2) one of the two cylinders is thrown in as
required by the design, whilst the other is thrown out and remains inoperative;
and 3) the spring mechanism or catch hook mechanism described, is caused to
operate and render the needles suitable for the action of that cylinder which is for
the time being in the working position.
Although only one lever is provided, the cylinders must be able to work
alternately, that is to say, one of the cylinders must be able to be thrown in, whilst
the other is inoperative. For this purpose there is arranged in the front harness of
the machine a special hook which when lifted, throws out of engagement a catch,
which up to that time kept one cylinder in the thrown out or inoperative position,
whilst a catch belonging to the second cylinder simultaneously retains this cylinder
as soon as it is thrown out and thus renders it inoperative.
When this hook is not lifted, the catch belonging to the first cylinder retains this
cylinder in its thrown out position.
The accompanying drawings illustrate two Jacquard machines constructed
according to this invention.
Fig. 1 is a side elevation partly in section; and
Fig. 2 is a vertical longitudinal section of a Jacquard machine whose rear cylinder
has reversely perforated cards;
Fig. 3 is a longitudinal section corresponding to Fig. 2, of a Jacquard machine
whose two cylinders have identically perforated cards.
Fig. 4 illustrates to a larger scale the Jacquard mechanism in vertical section.
Fig. 5 is a plan of the same.
Fig. 6 shows diagrammatically the arrangement of the loom with the warp threads
and the shed formation of the latter.
As shown the Jacquard machine has two cylinders C and Cone of which is
arranged in front, and the other at the rear of the machine. These two cylinders
act from opposite sides upon the needles. In order to effect this, the needles a in
the machine illustrated in Figs. 1 and 2 are each provided with two springs b¹ and 6ª
which bear respectively against opposite sides of the spring box located between

page_text: them, and against shoulders or projections on the needles. These springs are
arranged in such a manner that when one spring is compressed by movement of the
spring box b, the other spring becomes loose and inoperative. In consequence of
this, the needles can always be acted upon by that cylinder which is situated at the
side of the compressed springs.
The movement of the spring box bis effected from one of the cylinders in the
example shown from the rear cylinder C². For this purpose there are fixed to the
batten L' of this cylinder, connecting rods e¹ which are jointed to the upper ends of
two-armed levers c³, whose lower forked ends engage the pins on the spring
box b. The pins 63 are guided in horizontal slots g in the Jacquard frame G.
For throwing out both cylinders there is employed a lever E which carries in a
known manner the pulleys e' e which move in the loops s carried by the battens.
It is to be understood however that the one pulley, when the cylinder on that side
is inoperative, is capable of moving out of its loop downwards and descending
without hindrance as shown at the left hand side of Figs. 1 and 3. This is
permitted by suitably recessing the cross bars of the battens, or by suitably
mounting the loops on the said cross bars.
As hereinbefore mentioned both cylinders must be capable of working alternately
according to the design to be reproduced. For this purpose two catches_F' F' are
provided for the two cylinders C₁ C² respectively, or for their battens L' and L³,
these catches being capable of engaging alternately with cross pins on the
hattens. In order that this engagement may take place alternately, the outer ends
of these catches are connected by cords with an oscillating beam which is con-
tinually drawn down to one side by a spring fixed to the frame. In Fig. 1 this
spring is connected to that arm of the beam which is nearest to the front
cylinder C. The other end of the oscillating beam is connected to a cord k the
lower end of which is connected with the one arm of a two-armed lever, the
other arm of which is connected by a cord k³ with the neck cord p of a separate
hook P.
So long as this hook P is not lifted the rear cylinder C* will be operative. But
if the hook P be lifted, the lever K' K' will be partly turned, the previously
slack cord will be drawn tight, the oscillating beam will, after overcoming the
force of the spring P, be inclined towards the rear cylinder C, the catch F¹ for the
front cylinder will be raised or disengaged from the pin on the batten L', and
the catch F for the rear cylinder C will fall into engagement with the pin 1, on
the batten L. The front cylinder C¹ will then be operative, and the rear cylinder
inoperative. It is advantageous to connect both battens L' and L³ of the two
cylinders by a helical spring f (Figs. 2 and 3) because the cylinders will then work
better.
As will be easily understood, in this machine the cards for the rear cylinder C
must be reversely perforated, because in its cards the full or perforated places
have the same action upon the hooks as have the perforated or full places of
the cards for the front cylinder C¹.
If it be desired to employ identically perforated cards for both the front and
rear cylinders, then the needles must each be made in two separate parts a¹
and a, as shewn in Figs. 3 to 6 so that thus in addition to the front and rear
needle boards, there is also a front spring box and a rear one h².
The needles proper a' are acted upon by the front cylinder C¹, and the rear
portions of the needles or the counter needles a³ by the rear cylinder C³. Between
the parts a¹ and a³, or between the spring box h¹ and the spring box h³ there is
arranged the mechanism which enables both cylinders to work identically. This
mechanism consists of a number (corresponding to the number of needles) of two-
armed catch hook-levers d whose heavier arms d' are bent downwards in hook-form
at the ends that are nearest the needles a', whilst the lighter rear arms d² nearest
the counter needles, are bent inwards at their centres for a reason that will be
hereinafter explained.
There are provided as many horizontal rows of catch hook levers d as there arc

page_text: horizontal rows of needles arranged one above another, and all the catch hook
levers of one row are mounted to turn on a common shaft d. All the shafts d'are
supported at their two ends in blocks or cheeks d' which are horizontally movable
in slots g¹ in the Jacquard frame G. The ends of the needles a' as well as those
the counter needles a projecting through the spring boxes are bent horizontally
into the form of a loop a³ or of a hook as shewn in Fig. 5. The loops a³ of the
needles a¹ are arranged with respect to the catch-hook arms d' in such a manner
that the latter, when the entire catch hook mechanism is in a certain position, can
fall into these loops.
This is effected when the hooks at of the counter needles a' are by the striking
of the rear cylinder, pushed towards the needles proper a¹, the arms d³ of the
respective catch hook levers being thereby released and the heavier arms d¹ left
free to move downwards. So long however as the rear cylinder is out of operation,
none of the catch hook levers d will engage with the needle loops a³, because none
of them will be released. Therefore in this case the front cylinder C¹ will be
capable of working aloue without hindrance.
Assuming the front cylinder C¹ to be placed out of operation, and the rear
cylinder C to come into operation or striking position, then all the counter
needles a which strike upon full places in the cards, are pressed inwards and the
hooks a belonging to these counter needles pass just beyond the bend of the
arms d² of the catch hook levers d (Figs. 3 and 5) thereby releasing these levers
and allowing their catch hook arm d to move downwards and engage with the
loops as of the needles a'.
The hooks P remain up till this time vertical. Whilst the cylinder C' remains in
its active position, the griffe M moves further down, and the projections m fastened
thereto press the tappets d' of the bearing blocks towards the counter needles a³,
thereby moving the entire catch hook mechanism in the same direction so that all
the catch hooks d' that have engaged with the loops a³ of the needles a¹ will move
the corresponding hooks P into an inclined position, and therefore out of the reach
of the griffe bars of the griffe M. The cylinder C remains still thrown in or
operative whilst the griffe rises and thus lifts the hooks P that remain upright.
The projections m then release the tappets d' the catch-hook mechanism is
brought by springs f¹ into its former position, and the cylinder C³ is thrown out.
All the needles a¹ and the counter needles a return to their initial position, and
the catch-hook levers are then again held by the counter needles. The above
described operations are then repeated.
p
Thus as is required the full places in the cards of both cylinders effect through
the means described an oblique placing of the hooks and cause these hooks to
remain in their lowered position, whilst the perforated places in the cards enable
the hooks to remain in the upright position so that they will be lifted by the
griffe when it ascends.
In order that the two cylinders C' and C² may work simultaneously, the two
catches F1 F³ must be both lifted and thereby rendered inoperative, and the catch-
hook lever mechanism must be pushed towards the counter needles and held in this
position by wedges inserted in the slots g'. It is also necessary in this case that
the front cylinder C¹ shall remain in the thrown-in position for an instant only, and
shall be thrown out again from the needles a¹ before the griffe bars of the griffe
reach the hooks. In order to effect this, the loops employed in the usual mode of
working for the front cylinder C¹, must be replaced by another having only the
inclined portions (Fig. 3) which effects the throwing out or the throwing in, the
vertical portions, which in the loops shewn causes the cylinder to remain thrown
in during a certain time, being dispensed with.
The mode of operation of the Jacquard apparatus for simultaneous throwing in
of both cylinders has been hereinbefore clearly explained.
1

page_text: Improvements in Jacquard Machines.
I, RUDOLF BECK of Lazzenhof, Vienna I, Austria, Manufacturer, 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 reference to improvements in Jacquard machines of the kind
which work with two cylinders, one at the front and the other at the rear, in such
a manner that both cylinders act in the same horizontal plane on one and the same
system of hooks; and it has for object to allow of the use with the rear cylinder of
cards that are perforated identically with those for the front cylinder or are
reversely perforated. If the cords for the rear cylinder are the reverse of those
for the front cylinder, then upon each needle of the Jacquard apparatus there are
mounted two springs between which is arranged a horizontally movable spring box
by means of which one or other of the springs on each needle is compressed, so that
the needles will be operated by that cylinder which is at the side nearest the springs
that are compressed.
The horizontal movement of the spring box can be effected by means of lever
mechanism from the rear cylinder in such a manner that when this cylinder is
thrown out that is to say, is inactive, the spring box will be pushed towards the
front cylinder which is then being thrown in so that the springs nearest this
cylinder will be compressed and the needles prepared for the blow of this cylinder
before the same arrives in its thrown in position.
In many cases it is advantageous to employ identically perforated cards for both
cylinders, so as to render it possible for both cylinders to work in exactly the same
manner upon the hooks. In this case the needles instead of being each made in
one piece extending from the front needle board to the rear needle board, is made
in two parts, one of which is hereinafter called for distinction the needle proper and
works in conjunction with the front cylinder, whilst the other is hereinafter called
the counter needle and works in conjunction with the rear cylinder. Between the
two parts of the several needles, there is arranged a movable device comprising a
number of two-armed catch-hook levers one between the two parts of each needle.
The arrangement is such that so long as the rear cylinder is out of operation the
said device cannot act upon the needles proper, so that the front cylinder works as
in the ordinary one-cylinder Jacquard machines. But if the rear cylinder comes
into operation, the catch hook levers (corresponding to the pushed back counter
needles) will fall into loops attached to the needles proper and will afterwards
draw these needles so far back that the corresponding hooks will be placed
obliquely, and therefore will not be lifted by the griffe Consequently all the
hooks the corresponding counter needles of which strike against full places in the
cards of the rear cylinder, will be moved into an oblique position and will therefore
be pushed back by the griffe bars; whilst all hooks will remain at rest or upright
the counter needles of which pass through perforations in these cards. Thus
similar cards or similar places in the cards of both cylinders have the same action
upon the hooks.
In this case it is advantageous to effect the movement of the catch hook
mechanism by means of the griffe. For this purpose the catch-hook levers are
mounted on pins supported at their ends in blocks or cheeks capable of horizontal
movement and provided with tappets which together with the catch hook mechanism
are moved in the direction of the counter needles by projections fixed to the griffe
or other suitable movable part of the machine. When the projections release the
tappets, suitable springs serve to bring the catch-hook mechanism back into its
initial position.

page_text: To enable the two cylinders to work simultaneously the catch hook mechanism is
fixed in the position into which it is moved towards the rear cylinder, and the front
cylinder is thrown out before the griffe bars meet the hooks. This can be effected
by suitably shaping the loop fixed to the batten of this cylinder.
When a needle proper and the corresponding counter needle are pushed back or
inward simultaneously by the blow of their respective cylinder, the corresponding
hook will be held by the catch hook mechanism in the oblique position into which
it is moved by the needle proper. But if the needle proper only be pressed back
whilst the counter needle remains at rest, the hook will be first caused to assume an
oblique position, but since the front cylinder is thrown out before the corresponding
griffe bar can meet the hook, and the catch hook mechanism remains inoperative,
the hook will return into its upright position and thus be carried up by the griffe.
The same takes place with hooks the needles proper of which are not pushed back,
but the counter needles of which are pushed back.
Whereas in the alternate working of the two cylinders of which the front one,
for instance, contains the suitably perforated cards serving for lifting out the
design or figure (embroidering set), and the rear one contains the cards which
serve to lift out the ground (ground set), a two-shuttle half-silk fabric can be
produced, the ground weft of which is generally cotton, and the design or figure
weft of which is generally silk, there can be produced with simultaneous working
of both cylinders with the same cards as before, a single-shuttle (whole silk fabric.
This result follows from the fact that in the simultaneous working of both cylinders,
as can be seen from the mode of working above described, the two chains or sets of
cards of the cylinders complement each other in such a manner that to the liftings
produced by the front cylinder or the cards of the same, and not affected by the
catch hook mechanism from the rear, there are added liftings which are produced
by the cards of the rear cylinder. It is therefore not necessary to perforated fresh
cards.
All the movements necessary in the Jacquard machine can be derived from a
single lever actuated by hand or by a power shaft. By the movement of this
lever-1) the griffe is raised as heretofore; 2) one of the two cylinders is thrown
in as required by the design, whilst the other is thrown out and remains inoperative;
and 3) the spring mechanism or catch hook mechanism described, is caused to
operate and render the needles suitable for the action of that cylinder which is for
the time being in the working position.
Although only one lever is provided, the cylinders must be able to work
alternately, that is to say, one of the cylinders must be able to be thrown in, whilst
the other is inoperative. For this purpose there is arranged in the front harness of
the machine a special hook which when lifted, throws out of engagement a catch,
which up to that time kept one cylinder in the thrown out or inoperative position,
whilst a catch belonging to the second cylinder simultaneously retains this cylinder
as soon as it is thrown out and thus renders it inoperative.
When this hook is not lifted, the catch belonging to the first cylinder retains this
cylinder in its thrown out position.
The drawings filed with my Provisional Specification illustrate two Jacquard
machines constructed according to this invention.
Referring to these drawings
Fig. 1 is a side elevation partly in section; and
Fig. 2 is a vertical longitudinal section of a Jacquard machine whose rear
cylinder has reversely perforated cards;
Fig. 3 is a longitudinal section corresponding to Fig. 2, of a Jacquard machine
whose two cylinders have identically perforated cards.
Fig. 4 illustrates to a larger scale the Jacquard mechanism in vertical section.
Fig. 5 is a plan of the same.
Fig. 6 shews diagrammatically the arrangement of the loom with the warp
threads and the shed-formation of the latter.
As shewn the Jacquard machine has two cylinders C₁ and C³ one of which is

page_text: arranged in front, and the other at the rear of the machine. These two cylinders
act from opposite sides upon the needles. In order to effect this, the needles a in
the machine illustrated in Figs. 1 and 2 are each provided with two springs
and which bear respectively against opposite sides of the spring box & located
between them, and against shoulders or projections on the needles. These springs
are arranged in such a manner that when one spring is compressed by movement of
the spring box b, the other spring becomes loose and inoperative. In consequence
of this, the needles can always be acted upon by that cylinder which is situated¸nt
the side of the compressed springs.
The movement of the spring box bis effected from one of the cylinders in the
example shewn from the rear cylinder C³. For this purpose there are fixed to the
batten L' of this cylinder, connecting rods c¹ which are jointed to the upper ends
of two-armed levers c³, whose lower forked ends engage the pins 63 on the spring
box 6. The pins 6³ are guided in horizontal slots in the Jacquard frame G.
For throwing out both cylinders there is employed a lever E which carries in a
known manner the pulleys e¹e which move in the loops s carried by the battens.
It is to be understood however that the one pulley, when the cylinder on that side
is inoperative, is capable of moving out of its loop downwards and descending
without hindrance as shewn at the left hand side of Figs. 1 and 3. This is
permitted by suitably recessing the cross bars of the battens, or by suitably
mounting the loops on the said cross bars as shown.
As herein before mentioned both cylinders must be capable of working alternately
according to the design to be reproduced. For this purpose two catches FF are
provided for the two cylinders C C respectively, or for their battens L' and L,
these catches being capable of engaging alternately with cross pins on the battens.
In order that this engagement may take place alternately, the outer ends of these
catches are connected by cords with an oscillating beam which is continually
drawn down to one side by a spring fixed to the frame. In Fig. 1 this spring
is connected to that arm of the beam which is nearest to the front cylinder C'.
The other end of the oscillating beam is connected to a cord & the lower end of
which is connected with the one arm k¹ of a two-armed lever, the other arm ³ of
which is connected by a cord ³ with the neck cord p of a separate hook 1'.
So long as this hook P is not lifted the rear cylinder C will be operative. But
if the hook P be lifted, the lever will be partly turned, the previously slack
cord will be drawn tight, the oscillating beam will, after overcoming the force of
the spring, be inclined towards the rear cylinder C³, the catch F for the front
cylinder will be raised or disengaged from the pin on the batten L', and the
catch F for the rear cylinder will fall into engagement with the pin on the
batten L. The front cylinder C' will then be operative, and the rear cylinder
inoperative. It is advantageous to connect both battens L' and L² of the two
cylinders by a helical spring f (Figs. 2 and 3) because the cylinders will then work
better.
เ
As will be easily understood, in this machine the cards for the rear cylinder C³
must be reversely perforated, because in its cards the full or perforated places have
the same action upon the hooks as have the perforated or full places of the cards
for the front cylinder C¹.
If it be desired to employ identically perforated cards for both the front and
rear cylinders, then the needles must cach be made in two separate parts a' and a³,
as shewn in Figs. 3 to 6 so that thus in addition to the front and rear needle
boards, there is also a front spring box h¹ and a rear one h³.
The needles proper a¹ are acted upon by the front cylinder C³, and the rear
portions of the needles or the counter needles as by the rear cylinder C³. Between
the parts a' and a², or between the spring box and the spring box there is
arranged the mechanism which enables both cylinders to work identically. This
mechanism consists of a number (corresponding to the number of needles) of two-
armed catch-hook-levers d whose heavier arms are bent downwards in hook-form
at the ends that are nearest the needles a', whilst the lighter rear arms ‹³ nearest

page_text: the counter needles, are bent inwards at their centres for a reason that will be
hereinafter explained.
There are provided as many horizontal rows of catch hook levers d as there are
horizontal rows of needles arranged one above another, and all the catch hook
levers of one row are mounted to turn on a common shaft d². All the shafts d³
are supported at their two ends in blocks or cheeks which are horizontally
movable in slots g' in the Jacquard frame G. The ends of the needles a' as well
as those of the counter needles a³ projecting through the spring boxes are each bent
horizontally into the form of a loop a or of a hook a' as shewn in Fig. 5. The
loops as of the needles a¹ are arranged with respect to the catch-hook arms d' in
such a manner that the latter, when the entire catch hook mechanism is in a certain
position, can fall into these loops.
This is effected when the hooks a' of the counter needles a³ are, by the striking
of the rear cylinder, pushed towards the needles proper a¹, the arms d³ of the
respective catch hook levers being thereby released and the heavier arms d' left
free to move downwards. So long however as the rear cylinder is out of operation,
none of the catch hook levers d will engage with the needle loops a³, because none
of them will be released. Therefore in this case the front cylinder C¹ will be
capable of working alone without hindrance.
Assuming the front cylinder C₁ to be placed out of operation, and the rear
cylinder to come into operation or striking position, then all the counter
needles a³ which strike upon full places in the cards, are pressed inwards and the
hooks a belonging to these counter needles pass just beyond the bend of the
arms of the catch hook levers d (Figs. 3 and 5) thereby releasing these levers
and allowing their catch hook arm à to move downwards and engage with the
loops a³ of the needles a'.
The hooks P remain up till this time vertical. Whilst the cylinder C³ remains
in its active position, the griffe M moves further down, and the projections m
fastened thereto press the tappets d' of the bearing blocks d towards the counter
needles a', thereby moving the entire catch hook mechanism in the same direction
so that all the catch books d' that have engaged with the loops a³ of the
needles a will move the corresponding hooks P into an inclined position, and
therefore out of the reach of the griffe bars of the griffe M. The cylinder C³
remains still thrown in or operative whilst the griffe rises and thus lifts the hooks P
that remain upright. The projections m then release the tappets d'; the catch-
hook mechanism is brought by springs f¹ into its former position, and the
cylinder C is thrown out. All the needles a¹ and the counter needles a return
to their initial position, and the catch-hook levers are then again held by the
counter needles. The above described operations are then repeated.
Thus as is required the full places in the cards of both cylinders effect through
the means described an oblique placing of the hooks P and cause these hooks to
remain in their lowered position, whilst the perforated places in the cards enable
the other hooks to remain in the upright position so that they will be lifted by the
griffe when it ascends.
In order that the two cylinders C and C' may work simultaneously, the two
catches F F must be both lifted and thereby rendered inoperative, and the
catch-hook lever mechanism must be pushed towards the counter needles and held
in this position by wedges inserted in the slots g'. It is also necessary in this
case that the front cylinder C₁ shall remain in the thrown-in position for an
instant only, and shall be thrown out again from the needles a' before the griffe
bars of the griffe reach the hooks. In order to effect this, the loops employed
in the usual mode of working for the front cylinder C¹, must be replaced by
another having only the inclined portions (Fig. 3) which effects the throwing
out or the throwing in, the vertical portions, which in the loops shewn causes
the cylinder to remain thrown in during a certain time, being dispensed with.
The mode of operation of the Jacquard apparatus for simultaneously throwing
in both cylinders has been hereinbefore clearly explained.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is --
1. In a Jacquard machine having two cylinders C and C' of which C' is
arranged at the front and the other C³ at the rear of the machine, apparatus for
enabling both cylinders to act in the same horizontal plane upon one and the
same system of hooks or their needles and comprising
(a) In Jacquard machines in which the rear cards are reversely perforated to
the front ones, two springs b' and 6 mounted upon each of the needles a,
and between which is a horizontally movable spring box 6 that is guided
by means of pins in horizontal slots g of the Jacquard frame G and is
capable of being moved in the direction of the needles by means of a two-
armed lever operated from the rear cylinder so that one or the other of
the said springs can be compressed;
(b) In Jacquard machines in which both series of cards are similarly
perforated, an arrangement consisting of Jacquard needles each made in
two parts viz. a needle proper a¹ and a counter needle a² that terminate at
their inner ends in a loop a³ and a hook a respectively and between which
is arranged a catch-hook lever mechanism d by means of which all hooks P
corresponding to the counter needles a* that are for the time being pushed
back by the rear cylinder C' will be moved out of the path of the griffe
bars, so that the said cylinder C² can work in the same manner and can
have the same perforated cards as the front cylinder C' substantially as
herein described.
2. In Jacquard machines of the kind referred to in the preceding claim under
sub-section (6), mechanism comprising weighted catch-hook levers d pivoted on
common shafts and having forward heavier arms d' terminating in hooks, and
lighter rear ends formed in such a manner that the hooks a' of the counter
needles a will normally hold said levers out of action, the arrangement being
such that the said catch-hook levers will be released when the counter needles a³
are moved by the throw of the rear cylinder C³, and will, when in a suitable
position, fall into and engage with the loops a³ of the needles a' so that these
needles can be afterwards moved thereby substantially in the manner and for the
purpose hereinbefore described.
3. In Jacquard machines constructed as set forth in sub-section (6) of Claim 1
and in Claim 2, projections in fixed to the griffe M or on other suitable movable
part of the machine and arranged to act against tappets d' on the catch-hook
lever mechanism and move this mechanism in a backward direction substantially
as described.
4. In a Jacquard machine of the kind referred to in Claim 1, means whereby
notwithstanding there being only one lever E and only one system of hooks, both
cylinders can be caused to work alternately, said means comprising a hook P by.
lifting which by means of the griffe, the operative cylinder will be arrested,
whilst the cylinder hitherto arrested in a thrown out position will be released.
5. In a Jacquard machine arranged as specified in Claim 1, two catches Fi
and connected by means of levers and flexible connections with the neck-cord
P
of the hook P in such a manner that when the latter is lifted, one of the catches
renders its corresponding batten and cylinder inoperative, whilst the other catch
releases its corresponding cylinder substantially as herein described.
6. For enabling both cylinders of a Jacquard machine constructed as specified
under sub-section (b) of Claim 1 and in Claim 2, to work simultaneously :-
(a) Fixing the catch-hook mechanism in its rearward position by inserting
wedges into the slots g' in which the blocks d* carrying the said mechanism
slide;
(b) Providing the front cylinder C₁ with a loop having no play, for effecting
the momentary throwing in and throwing out of the said cylinder; and

page_text: (c) Releasing both of the two catches F' and F' simultaneously in order that
at each stroke of the griffe both cylinders can be thrown in, substantially
as herein described.
RUDOLF BECK,
By L. W., per F. B.