Improvements connected with Weavers' Looms.
Year: 1891

page_text: Date of Application, 10th July, 1891-Accepted, 31st Oct., 1891
COMPLETE SPECIFICATION.
Improvements connected with Weavers' Looms.
We GUSTAV KELLERMANN of Elberfeld and ROBERT KELLERMANN of
Ronsdorf, both in the German Empire, Manufacturers do hereby declare the
nature of said invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
The mode of carrying out weaving operations hitherto resorted to with the
known looms had amongst other defects that the chain threads were injured
by constantly rubbing against the front dents or reeds, while the latter were
moving to and fro, so that the back (rear) reed (ie. the reed behind the skewers)
were, owing to their peculiar position such as heretofore adopted standing useless
during the shedding of the chain. Moreover in linen and other cross-woven fabrics
deriving therefrom the uninterrupted pull and release of the tension weights caused
a good deal of tearing when the leaves were trended down.
In linen and other cross woven fabrics deriving therefrom, a further defect was
the circumstance that the treading of the leaves must be effected during the short
period of the forward motion of the lathe, as the picking motions (shoots) took
place during the rearward stroke of the lathe.
Whereas, in order to obtain good fabrics the changing of the shed had to be
started during the forward stroke of the lathe as far as the crossing, this shod took
place to the greatest extent during the rear or return stroke of the lathe in the
short time elapsing before the commencing of the weft.
In the manufacture of other cross woven fabrics whether made by a Jacquard or
other machine there is this defect that the chains are uselessly removed from the
high shed in order to be raised again to the same shed' for the next weft thus being
released from teusion to be again subjected to tension which has an injurious
effect.
All these defects which help to weaken the chain threads are remedied by the
following construction.
In the accompanying drawings Sheet 1, Figure 1 shows one of the dents or
reeds.
Figure 2 is a perspective view of a combination of such dents or reeds forming
the reed or comb proper.
Figure 3 is a front view of the front reeds.
Figure 4 a central horizontal section and Figure 5 a horizontal section through
the wide parts of the reeds.
Figure 6 illustrates the mode of operation of the reed or slay.
Figure 7 is a vertical section of a loom provided with our improvements, only
those parts being shown which illustrate the arrangement of the reeds and leaves.
Figure 7 illustrates the motion of the lathe.
Figure 7 shows the protecting device for preventing the injurious motion of the
shuttles.
Figure 8 is a vertical section of the warp beam.
Figures 9, 94 and 9" show the new arrangement of the mail mechanism.
In Figures 10 to 16 are diagrammatically shown the various times for the
treading and shedding of the different cross weavings.
In Sheet 2 Figures 1 and 2 show at an enlarged scale the lifting cams for the
loom. Figure 3 being a diagrammatic view illustrating the relative position of
the pairs of cams.
In Sheet 3 Figures 1 to 10 illustrate the combined treading motion of the
mechanism during an operation.

page_text: On Sheet 4 Figures 1 and 2 show a front view and a side view, partly in section,
of the Jacquard mechanism for remedying the defect whereby the chain threads
which have descended from the high shed have to be raised again for the
next weft.
Figures 3a, 3ẞ and 3y show a lifting wire in a straight and depressed position.
Figures 4a and 40'show the various positions of the treadle rollers.
SHEET 1.
The front reed or slay consists of the bars a' having the shape shown in Figure 1,
and being more than twice as wide at both ends as in the middle. When these
bara are placed as shown in Figures 2; 4 and 5 at such a distance from one another
80 that two adjacent bars are arranged in opposite directions, that is to say whereas
the cut out part of the one bar is directed towards the front part of the loom, the
cut out part of the next bar is directed towards the rear part of same that the front
surface appears at the wide parts like an ordinary comb or reed, the slits in the
centre are not only double as wide but the thickness of a bar wider. The central
section shows the "coarse" position and the section through the wide parts shows
the "fine" position.
Figure 6 illustrates the operation of this reed, the line a', a³ represents the high
shed, a, a, the deep shed and as the crossing of the chains. In its left end
position where the weft goes through the shed the reed A holds the chain entirely
in its coarse part, the fine parts being situated above the upper shed and below the
lower shed. In the motion of the lathe towards the crossing the coarse reed
motion must remain and only a little before the beating will one of the fine places
graze through the chain from which it is withdrawn as quickly again on its return
motion so that on the whole way to and fro it is the coarse part of the reed which
passes through the chain. The line of demarcation between the "fine" and the
coarse" position is indicated by the points a³, and shown in dotted lines as far as
the crossing.
66
This arrangement has this advantage that while the reed slides through the chain
in the coarse position there is a lesser and more irregular friction against the chain
threads than heretofore and hence the latter are better preserved than with au
ordinary reed or comb within which the chain threads are narrowly wedged in
during the whole motion of the lathe than with known modfications of the ordinary
reed which all fulfil their object imperfectly.
Figure 7 shows the mechanism whereby this peculiar motion of the reed is
effected in a ribbon or bar loom. B is one of the two side frames carrying the
lathe C. The reed, the upper and lower sheds and the crossing as well as the line of
demarcation between the "coarse" and the "fine" position are shown and indicated
here in the same manner as in Figures 1 to 6, the weft motion is not considered to
be effected in the ordinary manner.
The lathe C is connected with an arm.c oscillating upon a pin c' of the frame,.
this arm being furnished not with a mere hole for the pin but with a slot so that a
lifting motion may take place when the lathe moves towards the crossing. The
motion of the lathe is carried out as usual by the crank handle d' of the shaft D,
the connecting rod being articulated to a pind of the lathe arm. This extended
pin carries a roller d' moving to and fro during a revolution of the crank handle
upon a curved path or track & fixed to the frame, which movement corresponds to
the dotted line a' indicated at Figure 6.
Figure 7 shows the ascending motion of the lathe towards the crossing while
Figure 7 illustrates the downward motion of the same upon the curved track d;
in the first case the lower part of the reed is used for crossing, (beating) in the
second case the upper part.
it
The mechanism for the motion of the lathe is arranged on each side of the loom,
may however be constructed in many other ways, the lifting of the reed alone
without the lathe being also sufficient. Immediately behind the front reeds at

page_text: intervals of about from 3 to 5 inillimetres and by the side of one another are
arranged a number of thin vertical bars which can be easily inserted in position
and slide through the chain with the aid of the lathe so that the knotted ends
existing therein and the fibres of the chain threads may be grazed along and not.
lie across the chain, thus reducing to a minimum the risk of its being torn during
the changes of shed:
Towards the rear part of the mechanism the chain is distributed according to
circumstances over one or more bars a°, a', Figure 7 in front of which the formation
of the shed commences. Behind these bars (skewers) the rear reed a is placed in
a part of the chain where the shed' has not yet commenced whilst till hither the
rear reed was placed in front of these bars in the shed of the chain. By our
arrangement the injurious effects of the friction upon the chain threads by the rear
reed bars (during the shedding operation) is prevented.
The loose fibres and impurities which are worked at the beginning of the change
of shed can now freely drop down instead of being fixed and collecting in the
rear reeds.
For the purpose of preserving the chain, the heald leaf is also improved.
In Figures 9 and 9 the dimensions of the heald leaf M arc so selected that they
more clearly show the essential features thereof although not being the actual
dimensions of the device. In Figures 9 and 9 m² is the mail which is shown
larger in Figure 9B.
The silken healds m² and m³ are double and not drawn as in an ordinary comb,
tightly over the frame bars m' and m³ but they are supported by small india
rubber tubes me and m either in the manner shown in Figure 9 where they are
crossed over the tubes or as shown at Figure 94 where they are wound over the
same, thus great elasticity is imparted to the healds which has a preserving
influence upon the chain.
As stated in the opening sentences our improvements prevent the injurious
action of the shuttle in ordinary looms as it runs along the front reeds which are
moving to and fro owing to the pressure exerted upon the reeds or reed bars or
dents and upon the chain threads, wedged there between. For this purpose we
arrange according to Figure 7 close in front of the reed a and over its whole
width a row of projections c¹ placed at an interval of about 10 and made of
suitable length in order to prevent the contact between the reed and the shuttle
travelling along the said projections. By making use of the kind of lathe motion
above described with reference to Figure 74 Sheet 1 we obtain the passage of the
projections through the lower shed and its stay therein so long as during its travel
the shuttle requires to be guided along the projections.
As stated in the opening clause the chain is very much subjected to be torn in
linen and other similar cross woven fabrics owing to its having to release the
tension weight (which regulates and maintains the tension of the chain) uninter-
ruptedly and draw it up again cach time the leaves are treaded down for the
purpose of changing the shed. This operation is effected according to this inven-
tion by a peculiar manner of forming the shed by means of lifting cams as shown
by way of example in Figure 7. There are shown here by way of example four
leaves marked in consecutive order 1. 2. 3 and 4; they are arranged together in
pairs and are connected to the rollers gl and g by means of cords or lace so that as
one leaf of each pair is trended down from the upper to the lower shed the other
proceeds from the lower shed to the upper shed. As the treading down of one pair
is effected in a similar manner to that of the other pair it will only be requisite to
describe the operation with regards to the pair marked 1. 2.
Upon the axis of the roller g¹ is mounted at its other end a second roller ³ upon
which is fixed a short belt the extremities of which are connected by wires to the
treadles h¹ and h². The latter oscillate upon pins 4 and carry each a roller * and h*.
By pressing upon the latter with the aid of the lifting cams e² and e³ keyed upon
the shaft E these treadles are moved up and down and thus operate the leaves for
the purpose of forming the shed,

page_text: The axis E is driven by the shaft D by means of a wheel gearing d', e', herein-
after more fully referred to.
To prevent now the release and raising of the tension weights effected by the
chain during the change of shed we operate the leaves as follows:-While tlie pair
of leaves 1. 2 are treadled the pair 3. 4. remains standing still and holds the tension
weight but when the latter pair is treadled the former pair becomes stationary and
hold the tension weight in their turn. During the treading of the two pairs of
leaves the tension weight is not released and hence does not require to be raised
again, thus the defect arising from the tearing of the chain during the change of
slied caused by the continuous release and pulling of the tension weight is fully
remedied. At the next change of shed the pairs of leaves are not treaded in the
same order as before, the leaves 4 and 3 starting first while the leaves 1 and 2 hold
the tension weight. After the leaves 4 and 3 reach their end position, the leaves 2
and are treaded and the former leaves 3 and 4 hold the tension weight. The
change in the order of treading of the pairs of leaves is effected for the purpose of
equalizing the favourable or unfavourable condition of the change in the former or
subsequent treading of the pair of leaves which is summed up as follows: "pairs
one after the other 66
pairs in alternate sequence of rows."
ני
Although it is preferable that the leaves should be corded together in pairs yet
the purpose in view may be also fulfilled by moving them singly and without cords
by means of a lifting cam. We will however revert in the continuation of this
description to the leaves corded together in pairs and refer to Sheet 2 wherein the
lifting cams and e³ are represented and are used to impart the required motion
for treading the leaves, when for instance double wefted taffeta is being
manufactured.
SHEET 2.
In Figure 1 are shown at an enlarged scale the two lifting cams of the general
view shown in Figure 7 Sheet 1.
The arrangement of the wheel gearing transmitting a motion from the main
shaft of the axis of the lifting cams depends upon the number of wefts which are to
be shot in one shed and in this case this gearing is in the proportion of 1 to 4. If
we divide the periphery of the wheel mounted on the axis of the lifting cams
Figure 10 Sheet 1 in four equal parts, each quarter corresponds to a revolution of
the wheel upon the main shaft and the various motions for trending the leaves and
shooting the weft will be effected in the successive squares. If the dividing radii
are marked 1. 2. 3. 4 and represent the positions or periods for the "beating" of
the lathe the weft will be shot in between each two beatings and after two wefts a
treading of the leaves will occur the motion being as follows:
After the first stop and treading follow the
1, weft, then the
2, stop or crossing
2, weft
3, stop or crossing and second treading
3, weft
4, stop or crossing
4, weft,
as indicated in the diagram shown in Figure 10, Sheet 1.
each revolution of the lifting cam.
This order is repeated at
The came is delineated
These cams are constructed in the following manner.
by the upper circular arc i the bottom circular are and the two connecting
curves, and " Figure 1 Sheet 2. At acts as a treading curve and ¼" as a

page_text: corresponds in position to the releasing curve of the other cam in such a manner
that the roller of the treadle runs down against the treading curve and the
counter roller of the treadle h rolls upwards with a little play upon the releasing
curve and vice-versa, the roller of the treadle rolls down against the second
treading curve at the next change of shed while the counter 'roller of the treadle hi
can move upwards upon the second releasing curve.
Figure 2 Sheet 2 shows the pair of cams e and e' for the leaves 3 and 4. The
diameter of the circles is the same for all cams, a little less space being allowed for
the pair of cams by means of which the treading of the leaves 1 and 2 is effected
than for the pair of cams serving to tread the leaves 3 and 4 as more time is con-
sumed in treading the latter owing to the greatest spring in the shed required by
the said leaves 3 and 4 in advance of the leaves 1 and 2 to obtain a clean shed
or leash as is well known.
Figure 3 is a diagram showing the position of the four pairs of cams in connection
with one another, and illustrating the uniform distribution of the whole treading
stroke of the leaves for the two changes of shed relatively to the diameter X, y the
segments X, X, X, X³, y, y², y, having the same length while more time is
allowed for the 2nd pair of cams than for the first pair.
To clearly illustrate the way in which the treading of the leaves is carried out
during one operation Figures 1 to 10 Sheet 3 show diagrammatically how n
revolution of the cam shaft causes the treading of the leaves in the order illustrated
in Figure 10 Sheet 1. In all the figures the leaves are marked in consecutive
order 1. 2. 3. 4. and those that are treaded according to this figure shall be more
particularly referred to while the pairs of cams that are indicated each time are
those that work in consecutive order. It may now be remarked that a leaf is
raised or treaded when the corresponding treadle roller furnished with the same
figure is raised.
In Figure 2 the treading has proceeded so far that both leaves are at the same
height and during this change of shed 3 and 4 hold the tension weight until the
treading is fully terminated as shown in Figure 3. At this moment the leaf 3
must be raised by the trendle 3 while the leaf 4 must be sunk and in Figure 4 both
are at the same height; the treading is finished in Figure 5. If Figure 1 is now
looked at the full change of shed will be noticeable and after the shaft has
accomplished half a revolution the second change of shed is effected as illustrated
in Figures 6 to 10.
Figure 7 shows the leaves 4 and 2. These leaves were in an opposite direction
and motionless when the leaves 1 and 3 were working, but they now begin to move.
In this figure the leaf 4 is already half raised while the leaf 3 has sunk an equal
distance.
In Figure 8 the treading of the pair of leaves 4 and 3 is completed. Mean-
while the pair of leaves 1 and 2 have held the tension weight. As soon as 4 is
treaded 3 commences to go over, and the treading cam 2 to change the pair of
leaves 2, 1; Figure 9 shows this change completed as far as the two leaves are
concerned. In Figure 10 the treading of both pairs of leaves is effected for the
second time and the drawing of Figure 1 is reproduced.
To avoid the stationary pair of leaves baving to support the tension weight at
its proper height during the treading of the other pair of leaves a brake is applied
to the chain beam F (Figure 8 Sheet 1) in the following manner.
The cord wound at one end upon the chain beam is first led over a roller f
at the top, then downwardly over the roller of the tension weight being
finally fixed at the top f' by its end. A brake disc f is coupled to the chain
beam while below the same is arranged a crank lever which turns upon a pinƒ”

page_text: wuose arm is in contact with the peripher
other armis loaded by a light weights.
OI the Drake disc while tue
The length of the arm is so calculated that the contact point 10 falls
nearly upon a line passing through the centres of the chain beam and of the crank
lever pin whereby a momentary braking takes place while when tho chain is
drawn the beam can turn freely and unwind the same.
The inconvenience that the treading of the leaves must be effected during the
short period during the forward motion of the lathe is prevented by the construction
hereinafter described wherein it must again be assumed that the manufacture of
double wefted taffeta is taken as an example.
We do not use the wheel gearing transinitting a motion from the shaft D to the
axis E as in the former case, i.e. in the proportion of 1 to 4 but as 1 is to 6 as
shown in the general view of Figure 7 Sheet 1. and if we divide the periphery of
the wheel e' in eix equal parts each sixth will correspond to a revolution of the
crank wheel. If we now mark the dividing radii in the diagram shown in
Figure 11 with the numbers 1. 2. 3. 4. 5. 6 which are the beating, pauses or
crossing points there will be between
1 and 2 the first weft
2 and 3 the second weft
3 and 4 the first treading of the leaves
4 and 5 the third weft
5 and 6 the fourth weft
6 and 1 the second treading of the leaves
so that between 3 and 4 as well as between 6 and 1 the picking (shooting) motion
is at rest when the treading of the Icaves occurs. The weft is at rest for the
purpose of allowing the front reeds which move to and fro to release after the
trending of the leaves the adhering chain threads and to prepare the shed for
the following weft. We morcover gain this advantage that the leaves can be
trended even during the rearward motion of the lathe (during which period the
picking (shooting operation) must be effected) the leaves can be treaded so that
the reed may knock off the knotted ends found in the chain as well as the fibres
formed at each change of shed.
In the drawings the positions are indicated for each change of shed the time
may however be extended from one panse or crossing to the other so far as the
moving of the weft as shown in Figure 16. We use this alternative according as
required by the fabric and by the number of leaves used therefore the lifting cams
are arranged accordingly.
We have spoken of the double wefted taffeta for the purpose of remedying the
defects above indicated and we shall now further explain the process as carried
out with taffeta made by means of 1 and 3 wefts. In this cross weaving the weft
is shot three times after the first treading and once after the 2nd as shown
diagrammatically in Figure 12. During the treading the weft is at rest and this
treading is effected under constant holding of the tension weight.
The diagram in Figure 13 for the cross weaving 5 and 1 and 1 and 1 wefted
taffeta will be understood without explanation. It may be merely remarked that
the wheel gearing d', e', is here in the proportion of 1 to 12 while in this operation
the weft is shot 8 times and the changes of shed occur four times. In the previous
weaving of 3 and 1 weft taffeta the wheel gearing was taken in the proportion of
1 to 6 while in this operation the weft is shot four times and the shed is changed twice.
For ordinary single wefted linen weaving, the diagram of Figure 14 explains the
treading of the leaves and the travel of the weft when only the first advantage i.e.
the constant upholding of the tension weight is sought to be obtained while
Figure 15 represents the arrangement when both advantages are required.
To remedy when weaving with looms working by means of leaves the defect
above named i.e. having to raise again for the next weft the chain threads
returning from the high,shed.
We have altered the working of the so-called double machine in which each

page_text: lifting wire is acted upon by two blades. As this kind of loom may not be
generally known we give on Sheet 4 a drawing and hereunder a corresponding
description of the essential features thereof.
SHEET 4.
In Figure 1, a and a are the lifting blades moving upon the pin b and acting
upon the wires the number of which has been restricted to eight in this case.
Figure 3 shows separately one of these wires furnished with two hooks.
In Figure 1 a few of the eight wires are in their lowermost position for the
lower shed, the others, that is to say 1, 3, 4, and 8 are with the blade a' in the
upper or higher shed. The wires pass with their narrow bent ends through
the perforated batten d and are suitably connected to one leaf by means of two
cords.
The needles for depressing the wires pass through the needle boards e and eas
shown in the vertical section Figure 2, two needles act on one wire and they are
arranged opposite the cylinders and which are consolidated together at the top
by the rod g so as to be able to turn and are moreover covered by cards, being
capable of moving to and fro on the eyes h and below by means of tension cords
and treadle mechanism in the ordinary manner.
As shown in Figure 3ẞ the wire has been depressed by the cylinder and in
Figure 3y by the cylinder f. The blade a is secured to the lever k by the short
bolt i, and the blade a' is attached to the lever ' by the belt i¹.
The levers or beams oscillate upon the pin and are furnished at their other
ends with belts and m³ extending downwardly.
This description is now sufficient to explain the new modus operandi which will
now be proceeded with.
The belt is fixed to the treadle a and the belt n to the treadle n'. The
treadles turn upon the piu o and are provided with the rollers p and pl. The
cain serves to depress the roller p and the cam q¹ to depress the roller pl; both
cams are mounted on the common shaft driven by the toothed wheels gearing
with another corresponding toothed wheel, not shown in the drawings, and mounted
on the main shaft of the loom. The number of teeth are in the proportion of
2 to 1 so that when the crank shaft accomplishes one revolution the cam shaft.
accomplishes two. Both cams are delineated by a semi circle 1, a treading curve 2,
and a releasing curve 3, and are mounted upon their shaft being inclined at 180°
towards one another.
It is obvious from the figures that a blade will be in the lower shed, when the
corresponding treadle is in the upper end position, and in the upper shed when its
treadle is in the lower end position, so that the position of the treadles will indicate
that of the blades.
It will be seen in Figure 1 that the treadle n is depressed by the treading
curve 2, while the treadle 'n' is held down until the treading curve of the cam
coincides with the semi circle of the disc ; Figure 4a shows this arrangement
diagrammatically.
+
As the shaft continues to rotate the roller of the treadle n.runs upon the corre-
sponding semi circle and remains low while the roller of the treadle n' rolls upwards
upon the corresponding releasing curve 3, the leaf being drawn by its weight.
This motion is shown in Figure 4ẞ, wherein the new end position is shown in full
lines, while the previous and next positions are shown in dotted lines.
In the two Figures 4 and 4ẞ the positions of the blade are also shown, both
being in the upper shed in the former figure at the moment when the blade issuing
from the lower shed takes up the wires, which had not been deprossed by the
cylinder from the other blade. Immediately after this the blade a' descending
from the high shed takes with it the depressed wires and leaves those taken up by
the blade a in the high shed wherein they should remain according to the card for
the next weft, the object in view being attained viz. that no chain threads

page_text: should be uselessly removed from the high shed, and hence the threads are thus
preserved.
After the shed is formed, the weft is shot as shown in Figure 4ẞ and at the next
half revolution of the shaft r the treadle roller is depressed by the treading
curve 2 of the disc q so that the blade a¹ is thereby raised from the lower to the
upper shed. The wires not depressed by the cylinder f¹ are removed by the blade
now in the high shed, this blade moving now downward after which the second
weft is shot and the whole revolution of the shaft is completed.
The working of the Jacquard loom would be the same for the leaf loom the
slots in the harness replacing the leaves and the blade moving in parallel directions
instead of like a lever.
As we have no intention to protect the whole loom by Letters Patent but only
such parts whereby in the formation of the shed, first the low shed blade is raised
in the high shed where it takes over from the other blade those wires which have
not been depressed by the card, so that the last mentioned blade may go down
with the remaining wires leaving those wires behind which have to remain in
the high shed for the next weft, and as the contrivances described will answer
as well for leaf as for Jacquard looms which are provided with doubly hooked
wires and two blades, we claim accordingly these contrivances or mechanism not
only for the leaf loom but also for the Jacquard loom.
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 is-
An arrangement for preserving the chain threads in weaving looms characterized
by the following mechanism and devices:
1. A reed A composed of reeds bars or dents which are twice as wide at both
ends than in the centre and are so arranged as to form a row of narrow slits at
the top and at the bottom and a row of wide slits there between, the front dents
that is to say the lathe ascending or descending to and fro so that the narrow slits
act only during a pause while the wide slits act during the remaining motion
of the lathe, whereby the chain threads are subjected to much less friction than
heretofore.
2. The use of thin and easily removable bars immediately behind the front
dents or reeds in order to brush away the knots, ends and fibres of the chain
threads.
3. The arrangement of the rear reeds a" behind the bars, whereby the rubbing of
the chain threads upon the said rear reeds is prevented.
4. The mail comb upon the upper and lower frame ledges or bars supported
below by a small india rubber tube in order to stretch the healds resiliently.
5. The use of bars et immediately in front of the front reeds for the purpose of
preventing the grazing of the shuttle against the reed, the shuttle travelling along
these bars which after the shuttle has accomplished its course protrude from the
under shed while the lathe is brought with them to a pause.
6. In the weaving of linen and other similar fabrics a contrivance which permits
of the tension weight being supported and not released during the treading of the
leaves and hence not required to be drawn up again, whereby friction against the
chain and the tearing thereof during the change of sheds is reduced, consisting in
the arrangement of the lifting camis e e³ and et e mounted on a shaft E and moving
in consequence of their peculiar form the leaves in such a manner that a part
thereof hold the tension weight up and tread only after the remaining leaves are
partly or wholly treaded, these lifting cams effecting in alternate sequence the
treading of the leaves in the two successive changes of shed.
7. In the same cross weaving the arrangement of wheel gearing or transmission
of motion from the crank shaft d' to the cam shaft E in such a manner that a
motion of the lathe can take place without weft in order to be able to carry out the
change of shed at will as well as at the rear part or period of the lathe motion.

page_text: 8. In the same cross weaving the application of a brake upon the chain
beam consisting of the cord, the rollers and f, the brake disc and the
crank lever bearing from below nearly centrally against the latter, whereby
the chain is allowed to move forward but not backward being moreover relieved
in the last case.
9. A contrivance for remedying the defect caused by tho chain threads being
moved away from the high shed in order to be raised again thereto for the next
weft, while a leaf or Jacquard loom with two blades, double hooked lifting wires
and two cylinders is driven by the lifting cams g and gl Sheet IV. which owing
to their peculiar form raise a blade from the lower to the upper shed before the
other descends and thus cause the ascending blade to take up besides the lifting
wires which it carries with it the lifting wires from the other blade and to hold
them exactly in the high shed wherein they should remain for the next weft
according to the card.
101 1
PTL 1001
H. GARDNER,
Patent Agent, 166; Fleet Street, London, Agent for G. and R. Kellermann.