Improvements in and relating to Means for Inserting Weft into the Shed in Looms for Weaving.
Year: 1899

page_text: Date of Application, 27th Dec., 1899
Complete Specification Left, 24th Sept., 1900-Accepted, 17th Nov., 1900
PROVISIONAL SPECIFICATION.
Improvements in and relating to Means for Inserting Weft into the
Shed in Looms for Weaving.
I, OTTO HALLENSLEBEN, resident of Hilden, in the Province of the Rhine,
German Empire, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
The present invention relates to improvements in and connected with looms,
more especially to a device for drawing off the weft threads after the same are
laid into the shed and consists of providing a pair of tongs feeding the weft
threads and a pair of tongs drawing off the same, with inclined projections in
such a manner, that after the weft is laid in, the jaws of the tongs for drawing
off the weft threads are opened for the purpose of gripping the threads, whilst
the jaws of the tongs for feeding the threads are opened in the right moment for
the purpose of liberating the thread cut by a pair of scissors.
My invention is illustrated in the accompanying drawing, in which:
Figure
1 illustrates in side-view a loom according to my invention.
Figure 2 is a top view of the pair of tongs serving to draw off the weft threads,
Figure 3 illustrates in top and side view the pair of tongs for drawing the
weft threads across the loom,
Figures 4-7 illustrate different working positions of the tongs,
Figure 8 illustrates in side view the mechanism for actuating said tongs,
and
Figures 9 & 10 are sections through cd and fe of Figure 8.
In the drawing r r illustrates two horizontal rods sliding within a guide
provided in a lateral prolongation of the lathe and removed from the shed in
known manner by the levers s s¹, connecting rods u u¹, lever v,. connecting rod w,
lever actuated by the eccentrics t. The removal of the horizontal rods from
the shed takes place at the moment, when the weft threads h¹ are laid into the
same. The front extremities of the rods are provided with gripping tongs,
the jaws of which can be closed or opened.
A cam to which rotation is imparted from the main crank shaft by means of
chains or ropes g h influences rollers o¹ applied to the levers p.
The pair of tongs fixed to the righthand horizontal rod is opened by means
of said levers p in such a manner that the weft can be laid between the gripping
fingers, then it is closed again owing to the tension exerced by a helical spring
fixed to the levers p. The movement of the horizontal rod r causes the pair of
tongs b to grip the thread and to advance up to the middle of the fabric. At the
same time the horizontal rod r¹ together with its pair of tongs a is moved into
the shed from the opposite side and takes the weft thread off from the pair of
tongs 6 and after withdrawal of the rods r and r¹ draws the same completely
across the shed.
In order to facilitate the gripping and the freeing of the weft threads by the

page_text: tongs a and b, both tongs are provided with wedge-shaped projections as us-
trated in Figure 3.
Figure 4 shows the manner in which this gripping finger of the pair of tongs b
opens the pair of tongs a whereupon during the further sliding movement the
same closes again (Figure 5) and above the pair of tongues b takes the weft
thread h¹. When the tongs are removed from another, the gripping fingers of
the tongs a open the mouth of the tongs b (Figure 6), the latter liberates the
weft thread which now can be drawn across the shed from the tongs a.
The extremity of the weft-thread h¹ is cut at the right moment by means of a
pair of scissors y whilst the tongs a are caused to liberate the extremity of the
weft thread when leaving the shed by two stops y¹ fixed upon the lathe in the
manner illustrated in Figure 2.
The apparatus for actuating the pair of tongs is illustrated in Figures 8-10 of
the accompanying drawings. At each side of the lathe I provide guide-pieces a¹ b
which replace the shuttle boxes generally employed. These guide-pieces a¹ bl
are provided with a recess taking up the connecting piece ¹. This connecting
piece is altered in position by the lever s¹ to which movement is imparted
from a mechanism forming a part of the loom, (as shown in Figure 1). A recess
A roller F
is cut into the piece ¹, in which. recess a rack E is adapted to move.
lends support to the rack and at the same time forms the bearing for the pair of
tongs a. The lefthand extremity of the piece ¹ carries a frame A enclosing a
toothed wheel y¹ and a chain-wheel y. The toothed wheel engages into a rack G¹
fixed to the frame of the loom whilst the chain wheel is connected with the second
chain wheel H, which also is enclosed by a frame fixed to the connecting piece r¹,
by means of a chain running over both wheels. The chain-wheel H is rigidly
connected with a toothed wheel engaging into the rack E.
If now by means of the lever »¹ the connecting piece is displaced, the toothed
wheely takes into the lower rack, is thereby rotated and owing to the chain
also imparts rotation to the toothed wheel H, which engages into the rack E
removing the same from the guide r¹. Thus it is not necessary to employ on
both ends of the loom rods having the length of the half weaving width, because
the apparatus, which when pulled together, is of the quarter length of the weaving
width, elongates itself automatically being brought into motion in the way as
described above.
1000
ROBERT DEISSLER,
31A, Luisen Strasse, Berlin, N.W. Germany,
Agent for the Applicant.
Improvements in and relating to Means for Inserting went into the
Shed in Looms for Weaving.
I, Orro HALLENSLEBEN, of Hilden, in the Province of the Rhine, German
Empire, 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:-
The present invention relates to improvements in and connected with looms,
more especially to a device for feeding in and drawing off the weft threads
within the shed and consists in providing one pair of tongs for feeding the weft

page_text: projections or cams formed in such a manner, that after the weft is laid in by
the first pair of tongs the jaws of the tongs for drawing off the weft threads are
opened by the projections or cams on the said first pair of tongs for the purpose
of gripping the threads, whilst the jaws of the tongs for feeding the threads
are opened at the right moment for the purpose of liberating the thread which is
finally cut by a pair of scissors.
My invention is illustrated in the drawings filed with the Provisional Applica-
tion, in which:
Figure 1 illustrates in elevation a loom according to my invention,
Figure 2 is a plan of the pair of tongs serving to draw off the weft threads,
Figure 3 illustrates in plan and elevation the pair of tongs for drawing the
weft threads across the loom,
Figures 4-7 illustrate each in plan and elevation different working positions
of the tongs,
Figure 8 illustrates in elevation the mechanism for actuating one pair of said
tongs, and
Figures 9 and 10 are respectively sections through c-d and e-f of Figure S.
In the drawing are two horizontal slides reciprocating on or in suitable
guides provided in lateral prolongations of the frame and removed from the shed
in known manner by the levers s s¹, connecting rods uu, lever v, connecting
rod w, lever actuated by the cam t. The removal of the horizontal slides from
the shed takes place at the moment, when the weft threads are to be laid
into the same. The inner extremities of the slides r¹ are provided with gripping
tongs, the jaws of which can be closed and opened.
A cam o to which rotation is imparted from the main crank shaft by means
of chains or ropes g h influences levers p carrying rollers o¹ and capable of turning
round a pivot.
The pair of tongs fixed to the righthand horizontal slider is opened by means
of said levers when the latter are caused to turn round and their upper extremi-
ties close and press the righthand extremities of the pair of tongs together.
A balancing arm m n is influenced by a cam 7, to which rotation is imparted from
the crank shaft by bevel wheels and the ropes or chains g h. Simultaneously
with the opening of the pair of tongs 6 the arm m is lowered, so that the thread h¹
coming from the spool and guided through eyes fe and a narrow tube d attached
to the arm m can be inserted between the tongs b. As soon as the pressure of
the cam o upon the lower extremities of the levers ? ceases the latter free the
tongs when turning back into normal position, owing to the helical spring
arranged between them. When released the tongs close again and grip the
thread which is then carried to the middle of the fabric. At the same time the
horizontal slide 1 together with its pair of tongs a is moved into the shed from
the opposite side and takes the weft threads from the pair of tongs b and on the
withdrawal of the slides r r draws the same completely across the shed.
In order to facilitate the gripping and the freeing of the weft threads by the
tongs a and b, both tongs are provided with wedge-shaped projections or cams,
as illustrated in Figure 3.
Figure 4 shows the manner in which the gripping fingers of the pair of tongs b
open those of the pair of tongs a whereupon during the further inward movement
of the slides, both pairs of gripping fingers close again (Figure 5) the tongs a
gripping the weft thread h¹ above the tongs b. When the tongs are removed
from each other by the outward movement of the slides the projections on the
gripping fingers of the tongs a open the mouth of the tongs 6 (Figure 6) the
latter thus liberating the weft thread which is then drawn across the shed by
the tongs a.
The extremity of the weft thread ¹ is cut at the right moment by means of
a pair of scissors y which are operated by a cam z arranged upon the same
shaft as the cam 7, whilst the tongs a are caused to liberate the extremity of

page_text: the weft thread when leaving the shed by two stops y¹ fixed upon the frame
in the manner illustrated in Figures 1 and 2.
The apparatus for actuating the pair of tongs is illustrated in Figures 8-10
of the accompanying drawings. At each side of the frame I provide guide-
pieces a Figure 9, which replace the shuttle boxes generally employed.
These guide-pieces a b₁ are provided with recesses for supporting and guiding
the slides. The slide 1 is caused to reciprocate by the lever s¹ to which
movement is imparted from a mechanism forming a part of the loom, as shown
in Figure 1. A dove-tailed recess is cut in the slide r¹, in which recess a corre-
spondingly formed rack E is adapted to move. A roller Flends support to the
The lefthand extremity
rack which forms the bearing for the pair of tongs a.
of the piece carries a frame A in which are bearings for the spindle of a
toothed wheel J¹ and a chain wheel J. The toothed wheel J¹ engages with a
rack G¹ fixed to the frame of the loom whilst the chain wheel J is connected by
a chain H2 with the second chain wheel H, the spindle of which is mounted in
bearings in a frame fixed to the righthand extremity of the slide 1. The chain
wheel H is rigidly connected with a toothed wheel H¹ engaging with the rack E.
If now by means of the lever s¹ the slide 1 is caused to move to the right the
toothed wheel J¹ which gears with the lower fixed rack G¹, is thereby rotated
and owing to the chain imparts rotation to the toothed wheel H¹, which engages
with the rack E moving the same in advance of the guide ¹. Thus it is not
necessary to employ at both ends of the loom slides having the length of half
the weaving width, because the apparatus which, when closed up, occupies but
one quarter of the length of the weaving width, elongates itself automatically
when brought into motion in the way above described.
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
1. In a device for drawing off the weft threads, the combination of a pair of
tongs for feeding the weft threads, a pair of tongs for drawing off the said threads
means for opening and closing said tongs, and means for operating simultaneously
the said tongs, so that they meet in the middle of the shed and there transfer
the thread from one pair of said tongs to the other pair, substantially as described.
2. The construction of apparatus, substantially as described and shown.
D L 1
d day of
1000
ROBERT DEISSLER,
31A, Luisen Strasse, Berlin, N.W. Germany,
Agent for the Applicant.