Improvements in and relating to Jacquard Mechanism.
Year: 1894

page_text: Date of Application, 10th Apr., 1894
Complete Specification Left, 21st Dec., 1894-Accepted, 10th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Jacquard Mechanism.
I, REGINALD HADDAN of the Firm of Herbert Haddan & Co. 18 Buckingham
Street, Strand W.C. London, Patent Agent do hereby declare the nature of this
invention a communication to me from abroad by the Firm of Antoine Destombes
& Cie. of Roubaix in the Republic of France Mechanical Engineers to be as
follows:-
This invention relates to Jacquard mechanism employed in figure looms and
amongst the objects of the invention is to enable such warp threads as are to raised
or depressed as the case may be for the next shoot of weft, if they were already
respectively raised or depressed, to maintain their raised or depressed position so
that needless movement of the warp and of the harness and other parts may be
avoided. For this purpose we provide three parallel rods in connection with.
guides, levers, and resting cross rails so that while one of these bars acts as a
general guide, the other two serve respectively as latches or detents to hold the
particular set in its lowest position, or in its highest position so that the warp
thread or threads connected to them or each of them may be held down or up as
the case may be, and also as hooks to engage with the cross bars by which the
respective bars are to be raised from the lower into the higher position when
desired. The two rocking bars or latches are controlled by springs and by the
lateral pressure of the Jacquard needles which again are influenced by the pattern
cards.
The Jacquard needles are of two kinds to operate respectively against the one or
other of the two latch bars, and when any needle is moved by the pattern card
chain it throws back the latch bar out of contact with the resting cross bar above
or under which it has been detained, and brings it under the control of the lever
which carries it down or up as the case may be to again release it to be locked in
the position then given to it by its rocking forward under or above its retaining
cross bar.
The needles may have a tongue behind or before which a locking cross bar may
move after the needles have been met by the pattern card so that when once moved
by the card the latter may be relieved from the pressure necessary to maintain the
needles out of their normal position till the warp has changed accordingly.
The "cards" may be of any material pieced with holes through which studs may
be fitted, those boles being fitted with studs which the pattern may require. The
studs may be retained by a cross wire in each row, and the wire may be retained
by small eyelet wires fitted in unoccupied card holes and having their ends turned
over on the opposite side. Each card may have two rows of holes, or of studs,
one row for each of the two sets of needles.
Dh 10th
11004

page_text: Improvements in and relating to Jacquard Mechanism.
REGINALD HADDAN of the Firm of Herbert Haddan & Co., of 18 Bucking-
ham Street, Strand, London W.C. Patent Agent do hereby declare the nature of
this invention, a communication to me from abroad by the Firm of Antoine
Destombes & Cie. of Roubaix, in the Republic of France, Mechanical Engineers,
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
This invention relates to Jacquard mechanism employed in figure looms and
amongst the objects of the invention is to enable such warp threads as are to be
raised or depressed as the case may be for the next shoot of weft, if they were
already respectively raised or depressed, to maintain their raised or depressed
position so that needless movement of the warp and of the harness and other parts
may be avoided. For this purpose I provide three parallel rods or bars in con-
nection with guides, levers and resting cross rails so that while one of these rods or
bars acts as a general guide, the other two serve respectively first as latches or
detents to hold the particular set of rods in its lowest position or in its highest
position so that the warp thread or threads connected to them may be held down
or up as the case may be, and secondly as hooks to engage with the cross bars by
which the respective bars are to be raised from the lower into the higher position
or moved from the higher into the lower position when desired. The two rocking
bars or latch-bars are controlled by springs and by the lateral pressure of the
Jacquard needles which again are influenced by the pattern cards.
The Jacquard needles are of two kinds to operate respectively against the one
or other of the two latch bars, and when any needle is moved by the pattern card
chain it throws back the latch bar out of contact with the resting cross bar above
or under which it has been detained and brings it under the control of the lever
which carries it down or up as the case may be to again release it to be locked in
the position then given to it by its rocking forward under or above its retaining
cross bar.
The needles may have a tongue behind or before which a locking cross bar may
move after the needles have been met by the pattern card so that when once moved
by the card the latter may be relieved from the pressure necessary to maintain the
needles out of their normal position till the warp has changed accordingly.
The cards may be of any material pierced with holes through which studs may
be fitted, such holes being fitted with studs as the pattern may require. The studs
may be retained by a cross wire in each row, and the wire may be retained by smail
eyelet wires fitted in unoccupied card. holes and having their ends turned over on
the opposite side. Each card may have two rows of holes, or of studs, one row for
each of the two sets of needles.
The mechanisin is illustrated in the annexed drawing in which,
Fig. 1 represents the system or set of rods which is composed of three parts; viz.,
the general bar or rod M near the extremity of which are connected the latch bars
namely the rear bar C of the form as adopted for an ordinary figure loom, and the
front bar C' provided with two heels and t¹ which form a part of the novelty
claimed.
The bar C is pushed forward by the spring R, the bar C' is actuated in the same
direction by the spring R'. The three bars M, C, C', pass through slots in the
grating G which laterally supports them and serves also as a guide for the Jacquard
needles. P is a plate in two pieces which is moved backward or approached
according as the leaf is regulated; however once fixed they serve to receive and
maintain the heels t and t

page_text: To each set of rods correspond two needles A and A¹; the shorter of these
needles A', serves to push back the bar C¹ while the longer one A operates to push
back the bar C.
The
The cylinder Q having the form of any regular polygon is movable about a fixed.
axis O and by any suitable and well known gear it is made to perform a partial
revolution when the lifting lever L arrives at the upper part of its course.
lifting lever L and the lowering lever B, represented in sectional view, perform the.
same operations as in the present looms; the latter B furthermore is provided with .
grooves so as to offer a passage for the rod M.
In the relative positions of the levers and of the rods indicated in Fig. 1, in full
lines, the two levers are at their extreme positions, L of rising and B of falling;
the cylinder Q has rotated and if the rods which have been lifted are to remain
raised there, the needle A will be met by a stud while A' will be free; the latch
bar C therefore will remain in contact with the lever L, whilst latch bar C¹ moved
by the spring R' will fall forward and cause its heel t¹ to arrive over the cross bar
or plate P.
If at this moment the levers are set in motion, lever L will descend and lever B
will rise, the rods left to themselves will descend owing to the tension of the warp
and as the bar C₁ slides against the plate P the heel t¹ will hook itself on to plate P
and will hold the system or set of rods suspended.
During this time, the levers continuing their movement, arrive at their extreme
opposite positions, then return in the reverse direction until they arrive at their
starting point.
.
At a slight distance before arriving at this point the lever L will have entered
the notch of the bar C and lifted the same sufficiently to allow the plate P to
become disengaged from the notch t. The bar C' is then free again and the rods
have arrived again in their initial position without having made any appreciable
movement.
If the leaf which corresponds with this set, of rods is to keep its lower position,
the cards placed before the needles will offer a blank or void opposite to needle A'
and a stud in the plane of needle A; thus the same series of stages will be repeated
and the rods will remain raised, simply rising slightly off the plate P and resting
again thereon.
When on the other hand the leaf is to rise, the system of rods M, C, C' have to
descend and be pressed downwards and when this is to occur the needle A' will
meet a stud and be moved to press back the bar C₁, so that its upper end (when
slightly raised as aforesaid) is pressed back from over the plate P and the lug e
on its upper end is brought under the arm or hook / connected to or forming part
of lever L. The descent of lever L then causes the descent of the rods M, C, C',
while the lever B is rising. If the needle A not being pressed by a stud, allows
the bar C to swing forward under the action of spring R, the back of this bar will.
slide against the side surface of lever B as the former falls aud the latter rises,
until the notch e¹ in the bar C becomes engaged under the edge of lever B and the
notch e moves back from over the lever L. When now the lever B moves down-
ward, the system of rods is carried down with it and if permitted by the needle A¹,
the rod will swing outward and the notch t will engage under the plate P in the
same way that previously the notch t¹ engaged over the plate P.
The rod system thus remains lowered until the needle A¹ again presses back the
bar Cso that its lug e arrives above the upper edge of lever B when in its lowest
position and the notch comes from under plate P. The system can be and is then
raised by lever B while the lever L falls. The needle A is then caused to press
back the bar C to engage the lever L with its notch e so that the lever L ou again
rising lifts the rod system into its upper position.
The explanation given above indicates that the mechanism of the loom thus
5 modified requires that the needles when at work, be held in pressure against the
cylinder during almost the whole duration of a complete revolution of the actuating
shaft, but as the means which are applied generally with the cylinders furnished

page_text: with perforated cards do not permit of obtaining this result, simple means have
been devised therefor without modifying the movement of the lathe or batten.
To attain this, the needles are provided with a heel T (Fig. 2) and for the whole
of the needles there is provided a movable metallic blade L' held at its extremities
in two vertical slides and regulated so as to pass behind the heels of those needles.
corresponding with a blank space but in front of the heels of those needles which
are pushed back by the body of the card or a stud thereon according to the system
employed.
On connecting this blade with the lathe by a suitable system of connecting rods
and a combination of levers so that the blade be lifted at the precise moment when
the cylinder is at the point of coming in contact with the needles, and so that this
blade falls back automatically, when the cylinder having arrived at the end of its
course against the needle board, has completely pushed back those of the needles
intended so to be, by the blade thus descending in front of the heels of the needles
thus pushed back, they are not allowed to return, as their heels support themselves
against the blade and they will be able to continue their action upon the rods.
The studs S (Fig. 3) of steel or any other suitable material, are provided with
a hole in their middle and have their upper extremities cut out or recessed in the
form of a half circle. The cards N of wood, sheet iron, or any other material are
provided with two rows of holes spaced in accordance with the spacing of the
needles and placed alternately in the two rows. In this manner all the holes of
one row correspond to the long needles and those of the other row to the short
needles. As the diameter of these holes is equal to that of the studs it is sufficient
for draughting the pattern to place the studs in the holes corresponding to the
leaves to be moved; when the card is thus draughted, there are placed in some of
those holes which are left free and also in the two holes which are specially
arranged at the extremity of each row, small braces, the eyes of which reach just
above the surface of the card. It is then only necessary to pass through the holes
of the braces and of the studs of each row a small wire or thread the extremities
of which are slightly bent or secured in order to fasten the studs in the cards.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In Jacquard mechanism the combination with the rods M and C of the lifting
latch bars C with two heels forming notches serving to maintain the system of
rods M, C, C¹, hcoked over or beneath a fixed cross piece P.
2. The combination of the needles having heels T with a movable blade L¹ for
locking the needles as described.
3. The combination with perforated cards or equivalent supports of any material,
of the studs S and means for securing same, substantially as set forth.
ו.
CD
1
1001
R. HADDAN.