Year: 1886

page_text: 1, IGNAZ PREISSLER, of Grottau, Boliema, in the Empire of Austria, do mereby
declare the nature of this invention to be as follows:-
This invention has for its object to obviate the uncertainty which occurs in the
operation of the Jacquard mechanism of looms as soon as the latter work beyond a
certain speed.
According to this invention the mechanism is arranged in such a manner that the
Jacquard roller or drum turns only once for every two woof threads that are. laid. In
connection with this roller are arranged two rows of needles, which are independent
of each other and which allow the lifting of the wires or cords belonging to them,
which lifting wires or cords, in their turn, are in connection with the respective leaf
of heddles.
The roller or drum, instead of having several rows of holes for the lifting-wire needles,
contains only two rows, into which the points of the needles of the upper or the lower
row respectively can enter when the perforations in the Jacquard card come opposite
to them. Every needle, where it acts upon the lifting wire, is provided with an
enlargement in which is formed an oblong slot terminating in a round opening. The
latter is so large that it always allows the vertical lifting or lowering of the lifting
wires which are round in section. For a portion of its length, however, each lifting
wire is filed flat on two sides, and this flat portion corresponds to the oblong slit of the
needles so that, when, for instance, the flat portion of a. lifting wire is in the same
plane with the needle belonging thereto in the back motion of the needle, the needle

page_text: can slide upon the said flat portion, and is therefore incapable of pressing back the
lifting wire, and can, in fact, exert no action whatever upon the motion of the lifting
wires.
When, on the contrary, the full round section of the lifting wire is in the circular
enlargement the said wire is, in the back-motion of the needle, (that is in the case
where the card has no perforation) pressed back so that it cannot be engaged by the
lifting-blade, which, meanwhile, ascends.
The lifting wires are, as usual, provided with hooks below which the lifting blades
engage to lift the lifting wires which have not been moved back by the needles. Onc
of the wires of each row, is connected with each leaf'; accordingly each leaf has two
lifting wires.
In order that the connecting pieces between the lifting-wire and leaf cannot turn
upon their axes, they are made of rectangular section and slide in a correspondingly
recessed board.
In this manner also the turning of the lifting-wires themselves is prevented, this
being necessary in order that the flat portion shall always be opposite the slots in the
needles.
On the main shaft of the loom is a double crank which alternately moves the two
draw-rods up and down. These draw-rods act upon the ends of two double levers
supported in the frame of the Jacquard machine, whilst the other ends of these levers
are jointed by short connecting rods with the ends of the lifting blades. The latter are
supported on an arm of the frame by means of short intermediate joints so that
they can turn. Each has at the front end two small rolls running on a guide-plate
which also prevents. the lateral motion of the blades, being provided with slits in
which the front ends of the blades are inserted.
By this connection from the double crank an ascending and descending motion is
imparted to each blade at every revolution of the main shaft, that is when the shuttle
has completed a to-and-fro motion.
On a second shaft of the loom which makes a full revolution at every motion of the
shuttle, thus turning twice as rapidly as the main shaft, is fixed an eccentric the rod.
of which causes a lever to swing up and down and turn a third shaft connected with
it and supported in bearings on the frame. From the third shaft the motion is com-
municated to a lever provided with a slit for adjustment and keyed upon a fourth
shaft. Two arms on the fourth shaft hold between them the card roller which there-
fore swings at every revolution of the second shaft once to-and-fro against the lifting
wire needles..
The rotation of the card roller, one quarter of a revolution each time, is effected in a
known manner by a hook which falls in behind pins on the roller and turns the latter.
This rotation however takes place only after every second back-motion of the roller,
because the hook is lifted out after every second movement, and therefore cannot effect
the rotation.
For this purpose on the rear side of one of the two lifting blades is arranged a
striker, which, when the lifting blade passes down to its lowest position, strikes upon
the end of the hook prolonged beyond its fulcrum, and thereby lifts the hook itself so
that the latter cannot turn the card roller.
The operation of the described mechanism is as follows. At every motion of the
shuttle one of the two lifting blades ascends, and takes with it those lifting wires which
are not pressed back by the needles, that is, those entering holes in the Jacquard card.
In this case the points of the needles can enter the roller; the needles are not then
moved, and the lifting wires are lifted by the blade by means of their hook. If, on
the contrary, there is no hole in the card, opposite a needle, the latter is pressed back,
in opposition to the action of the spring which is designed to press it against the roller,
and moves the lifting-wire with it, because the full round section of the same cannot
pass into the slot. The ascending blade cannot then seize the lifting wire which
accordingly remains below. The other lifting-wire, which in the meantime is
descending, is not affected by the motion of the card roller, as the flat part of the

page_text: same just passes into the slit of the needle, thus the latter has, in any motion it may
make, no influence upon the descending motion of the lifting wire. In the next
motion of the shuttle the reverse takes place; the first lifting wire which now descends
is not moved by the needle connected with it, and only the second lifting-blade, which
now ascends, can take the second lifting wire up with it when a hole exists in the.
Jacquard card at the required point. If there is no hole in the card, the needles are
pushed back, and the lifting-wires corresponding to them are pressed away from the
blade so that these lifting-wires do not ascend at all, and the leaf belonging thereto
remains in its lower position.
By this device the exact motion of the leaves is effected with certainty by the
Jacquard mechanism even during the rapid motion of the loom,
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant..

page_text: I, IGNAZ PREISSLER, of Grottau, Bohemia, in the Empire of Austria, 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 for its object to obviate the uncertainty which occurs in the
operation of the Jacquard mechanism of looms, as soon as the latter work beyond a
certain speed.
According to this invention the mechanism is arranged in such a manner that the
prismatic Jacquard roller, or drum, turns only once for every two woof threads that
are laid. In connection with this roller are arranged two rows of needles, which are
independent of each other and which allow the lifting of the wires or cords belonging
to them, which lifting-wires or cords in their turn are in connection with the respective
leaf of heddles.
In the accompanying drawing.
Figure 1. represents the side view of a loom provided with apparatus constructed
according to my invention.
Figure 2 is a view from the front.
Figures 3 and 4 are a side view and plan, respectively, drawn to an enlarged scale,
of the parts of the Jacquard mechanism which are in direct connection with the
lifting wires.
A is the prismatic roller which instead of having several rows of holes for the lifting-
wire needles, contains only two rows, into which the points of the needles B, B₁
of the upper and lower rows respectively, can enter when perforations in the Jacquard
card come opposite to them.
Figure 3 shows the positions in which the card is in this case.
The needles B B₁ where they act upon the lifting wires CC₁, are provided with
enlargements in which are formed oblong slots 63 respectively, terminating in round
openings. The latter are so large that they always allow the vertical lifting or
lowering of the lifting wires CC which are round in section. For a portion of their
length however, the lifting-wires CC are filed flat on two sides, as indicated at cc
Figure 3, and these flat portions correspond with the oblong slots 2, 3 of the
needles BB', so that when, for instance, the flat portion of a lifting wire C is in
the same plane with the needle B belonging thereto, the said needle can slide back
without moving the lifting wire C, and can in fact exert no action whatever upon the
motion of the lifting wires.
When, on the contrary, the full round section of the lifting-wire C, for instance, is
in the circular enlargement &³, the said wire C is, in the back motion of the needle B¹,
produced when the card presents no perforation opposite the same, pressed back so
that it cannot be engaged by the lifting-blade D' in its ascending motion.

page_text: The lifting-wires CC are as usual provided with the hooks c² ² below which the
lifting blades D D' engage to lift the wires CC which have not been moved back by
the needles. One of the wires of each row, is connected with the leaf E (figure 1);
Accordingly each leaf has two lifting wires and C..
In order that the connecting pieces CC between the lifting-wires and leaf cannot
turn upon their axes, they are made of rectangular section and slide in a cor-
respondingly recessed board (figure 1).
In this manner also the turning of the lifting-wires themselves is prevented, this
being necessary in order that the flat portions shall always be opposite the slots.
On the main shaft F of the loom is a double crank Fi which alternately moves the
two draw rods G G₁ up and down. These draw rods act upon the ends of two double
levers HH, supported at in the frame of the Jacquard machine, whilst the other
ends of these levers are jointed by short connecting rods K K with the ends of the
lifting-blades D D¹, (figure 2). The latter are supported on an arm M of the frame
by means of short intermediate joints m so that they can turn. Each lifting blade
has at the front end two small rolls, running on a guide-plate N which prevents
the lateral motion of the blades D D', the said guide-plate being provided with, slots
in which the front ends of the blades slide.
By this connection with-the double-crank F¹ an ascending and descending motion
is imparted to each blade D D¹ at every revolution of the main shaft F, that is when
the shuttle has completed a to-and-fro motion.
On a shaft O which makes a full revolution at every motion of the shuttle, thus
turning twice as rapidly as the main shaft F, is fixed an eccentric O¹ the rod o of
which causes a lever P to swing up and down, and oscillate or rock a shaft P¹ con-
nected with it and supported in bearings p on the frame. From the shaft P the
motion is communicated to the lever provided with a slot for adjustment and keyed
upon the shaft Q. Two arms R R on the shaft Q' hold between them the card
roller A which therefore swings at every revolution of the shaft O once to and fro
against the lifting-wire needles.
The periodical rotation of the card roller for a quarter of a revolution is effected, in
a known manner by a hook a¹ which engages behind pins on the said roller and turns
the latter at every rearward motion through an angle of 90°. This rotation however
takes place only after every second back-motion of the roller, because the hook a¹ is
lifted after every second movement; and therefore cannot effect the rotation.
For accomplishing this lifting I arrange on the rear side of one of the two lifting
blades D a tappets (Figure 1) which, when the lifting blade passes down to its
lowest position, impinges against the end a² of the hook at which is prolonged beyond
its fulcrum, and thereby lifts the hook itself so that the latter cannot turn the card
roller A.
canl
The operation of the described mechanism is as follows:-At every motion of the
shuttle one of the two lifting blades, for instance D¹, ascends and takes with it those
lifting wires which are not pressed back by the needles, that is those wires the
needles of which correspond with holes in the Jacquard card so that their points
enter the roller. The needles are not then moved and the lifting wires Care lifted
by the blade D' by means of their hook c². The needles on the contrary which do
not correspond with holes in the card are pressed back in opposition to the action of
the springs which are designed to press them against the roller, and move their lifting
wires with them, because the full round section of the same cannot pass into the
slots b³. The ascending blade cannot then seize the lifting wires which latter
accordingly remain below. The other lifting wires C which in the meantime are
descending are not affected by the motion of the card roller as the flat parts of the
said wires pass into the slots of the needles B, thus the latter have no influence
upon the descending motion of the lifting wires in any motion they may make. In
the next motion of the shuttle the reverse takes place; that is to say,
the lifting
wires which now descend are not moved by the needles B connected with them,
only those wires C, the needles of which correspond with holes in the Jacquard card
being lifted by the blade D. Those needles which do not correspond with holes in

page_text: the card are pushed back, and the lifting-wires C corresponding to them are pressed
away from the blade D so that these lifting wires do not ascend and the leaf belonging
thereto remains in its lower position.
By this device the exact motion of the leaves is effected with certainty by the
Jacquard mechanism, even during the rapid motion of the loom.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :-
First. In a loom, the arrangement. of double lifting leaf mechanism which causes
the ascent and descent of each leaf, by means of two lifting wires operating inde-
pendently of each other, and moving alternately up and down, the needles, which are
pushed forward by springs being capable of acting upon their lifting wires only when
the latter are in their lower position, whilst the action in all other positions is rendered
ineffective, the lifting wires being provided with flat parts c, which can be displaced
in the slots of the needles.
Second. In a loom, the lifting and lowering of the leaves E by micans of two
lifting wires CC acting upon each leaf and moved independently of each other,
the said wires CC being arranged in connection with the needles B B' provided with
slots, and circular notches, by reason of which they can act upon their lifting
wires only when the latter are in their lower positions, whilst the action in all other
positions is rendered ineffective by the lifting wires being provided with flattened
portions c, c, which can shift in the slots of the needles all substantially as, and
for the purpose; described.
Third. The arrangement of a double crank F¹ upon the main shaft of the loom;
the draw rods G G the levers H, H', and the coupling rods K, K' for operating the
lifting blades D, D' for causing the alternate ascent and descent of the lifting wires of
a leaf of the excentric O' having the rod o, the lever P, the shaft P1, and the angle
lever Q, R, R for moving the card roller A; and of the hook a for turning the
roller A, which hook is lifted through the medium of the tappet s upon the blade D'
after every second movement.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.