Year: 1886

page_text: Date of Application, 20th May, 1886.
Complete Left, 18th Feb., 1887.
Complete Accepted, 18th Mar., 1887.
1, FERDINAND PAAs of Märkisch Gladbach, in the German Empire, Manufacturer
do hereby declare the nature of this invention to be as follows:-
The weft stop motions of known construction for looms have a fork with vertical
prongs against which the weft thread presses whereby the catch hook of the weft fork
is held in a raised position, while on the breaking of a weft thread, the weft fork passes
through the reed of the lathe and the catch hook being thus lowered effects the
stopping of the loom in the well known manner.
This arrangement of stop motion is only suitable in cases where only a single weft
thread lies in front of the reed, that is to say, where there is no change of shuttles,
because if this arrangement were applied in its present form on that side of the loom
at which the change of shuttles takes place, the fork would often encounter two,
three, or more weft threads in the shuttle race, and could therefore not act upon the
last thrown thread alone. In addition to this inconvenience, in looms where there is
a change of shuttles on both sides there would be the additional one that when the
shuttle is thrown repeatedly from one and the same side the setting lever would often
be raised at the wrong side and therefore the loom be either not stopped at all or
incorrectly stopped.
The present improvements have for their object to enable the above described
stopping mechanism to be applied also to that side of looms where there is a change
of shuttles, and they consist mainly in raising the last thrown weft thread by a lever
arrangement at the forward motion of the lathe, so as to let it be acted upon by the

page_text: fork which is also placed in a raised position, while the previously thrown threads are
kept below the reach of the fork, so as not to act upon this. With looms where the
shuttles are changed on both sides, there is also applied a spindle that can move to
and fro longitudinally, the movement of which is dependent upon the motion of the
change cards of the picker levers, and which consequently by means of cams raise the
setting lever in accordance with the throws of the shuttles. In this manner the setting
lever and the weft fork only operate on that side to which the shuttle has been thrown,
and consequently only act upon the last thrown thread, so that the loom is always
correctly stopped on the breakage of this thread.
Referring to the accompanying drawings, in which Fig. 1 shews a side view and
Fig. 2 a front view of part of the loom, it will be seen that on the back of the lathe
frame there is mounted a double ended lever p the lower end of which is connected by
a cord or wire to the bottom part of the loom frame or to the floor, while its upper
end carries a wire that passes through the reed, and lies in a recess in the shuttle
race. On the forward motion of the lathe, the lever p and consequently also the
wire r are raised into the position shewn in full lines at Fig. 1, whereby the wire is
made to raise the thread just thrown, while on the backward motion of the lathe the
lever and wire drop, as shewn in dotted lines Fig. 1, the wire then lying in the recess
of the shuttle race.
The weft fork is held by the fork holder o at a height above the shuttle race
exceeding the height of the shuttle, so that its prongs cannot come in contact with the
threads previously thrown, and are only acted upon by the raised thread.
In order to insure that even in the case where the previously thrown shuttles are
situated in the uppermost shuttle boxes, the threads of these cannot come in contact
with the fork, a guards is connected to the shuttle race, so arranged that while the
shuttles can move freely beneath it, the previously thrown threads are prevented from
rising above s while the last thrown thread can be raised slightly above it by the
wire r, as described.
On the side of the loom at which the throwing in and outgear is situated (at the
right hand side of Fig. 2), the fork is connected by the fork holder in the known
manner with the fork arm t. On the opposite side the fork holder o is connected by
mounted in a rotatable manner under the breast beam
of the loom, which bar bears with an arm 7 against the fork arm t, and thus effects
the stopping of the loom at the required moment.
the lever with the bar m
The levers are actuated by cams on the axis a which is geared to the crank
shaft by means of toothed wheels c c¹. In looms where the shuttles are only changed
on one side, the axis a makes half as many revolutions as the crankshaft, as is the case
with many existing looms.
With looms in which the throw of the shuttle takes place several times consecutively
from one and the same side, the axis a makes the same number of revolutions as the
crankshaft; and is in addition so arranged that it can be shifted longitudinally to
the right or left. As in most looms where there is a consecutive change of weft, such
as in Smith's loom, the picker lever motion is regulated by change cards, the double
ended lever g, pivotted at h, being made by its connection with to follow the
movement of the change. cards of the picker levers, so as to rise and fall. If now & be
raised, the picker lever actuated by g will also be raised on this side, while the picker
lever on the other side will sink, owing to the opposite connection of g with i..
According to the present invention a lever d, pivotted at e to the framing is
connected with the axis a and lever g, being connected to the latter to the left of
the pivot . If now the picker lever be raised the part of the lever g to the left of the
pivot h is lowered, and owing to the connection through the lever d the axis a is made
to shift to the right, while in the opposite case the axis a is moved back to the left
by d. By this means the axis a is moved to and fro accurately according to the
action of the change cards that regulate the picker motion, and thus the motion of

page_text: the levers is governed. The lever on the left hand side will namely be raised
when the shuttle passes into the left hand shuttle box, and that on the right hand side
when the shuttle passes to the right hand side.
By the application of the shifting axis a and the lever regulated thereby in
combination with the lever pr that raises the weft thread and the guard s, it is
rendered possible to make the stopping motion act only in accordance with the last
thrown thread, so that on the breaking hereof the loom is at once stopped.
ABEL & IMRAY,
28, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: I, FERDINAND PAAS, of Markisch, Gladbach in the 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 weft stop motions of known construction for looms have a fork with vertical
prongs against which the weft thread presses whereby the catch hook of the weft fork
is held in a raised position, while on the breaking of a weft thread, the weft fork passes
through the reed of the lathe, and the catch hook being thus lowered effects the
stopping of the loom in the well known manner.
This arrangement of stop motion is only suitable in cases where only a single weft
thread lies in front of the reed, that is to say, where there is no change of shuttles,
because if this arrangement were applied in its present form, on that side of the loomi
at which the change of shuttles takes place, the fork would often encounter two, three
or more weft threads in the shuttle race, and could therefore not act upon the last
thrown thread alone. In addition to this inconvenience, in looms where there is a
change of shuttles on both sides there would be the additional one that when the
shuttle is thrown repeatedly from one and the same side the disengaging lever would
often be raised at the wrong side and therefore the loom be either not stopped at all
or incorrectly stopped.
The present improvements have for their object to enable the above described
stopping mechanism to be applied also to that side of looms where there is a change
of shuttles, and they consist mainly in raising the last thrown weft thread by a lever
arrangement at the forward motion of the lathe, so as to let it be acted upon by the
fork which is also placed in a raised position, while the previously thrown threads are
kept below the reach of the fork so as not to act upon this. With looms where the
shuttles are changed on both sides there is also applied a spindle that can move to and
fro longitudinally, the movement of which is dependent upon the motion of the change
cards of the picker levers and which, consequently, by means of cams, raise the
setting lever in accordance with the throws of the shuttles. In this manner the
setting lever and the weft fork only operate on that side to which the shuttle has been
thrown, and consequently only act upon the last thrown thread, so that the loom is
always correctly stopped on the breakage of this thread.
Referring to the accompanying drawing, in which Fig. 1 shews a side view and
Fig. 2 a front view of part of a loom, it will be seen that on the back of the lathe
frame there is mounted a double ended lever p, .the lower end of which is connected
by a cord or wire to the bottom part of the loom frame or to the floor, while its upper

page_text: end carries a wire that passes through the reed, and lies in a recess in the shuttle
race.
On the forward motion of the lathe, the lever p and consequently also the wire >
are raised into the position shewn in full lines at Fig. 1, whereby the wire is made to
raise the thread just thrown, while on the backward motion of the lathe the lever and
wire drop, as shewn in dotted lines Fig. 1, the wire then lying in the recess of the
shuttle race.
The weft fork is held by the fork holder o at a height above the shuttle race
exceeding the height of the shuttle, so that its prongs cannot come in contact with
the threads previously thrown, and are only acted upon by the raised thread.
In order to insure that, even in the case where the previously thrown shuttles are
situated in the uppermost shuttle boxes, the threads of these cannot come in contact
with the fork, a guards is connected to the shuttle race, so arranged that, while the
shuttles can move freely beneath it, the previously thrown threads are prevented from
rising above s while the last thrown thread can be raised slightly above it by the
wire, as described.
On the side of the loom at which the throwing in and out gear is situated (at the
right hand side of Fig. 2) the fork is connected by the fork holder in the known
manner with the fork arm /. On the opposite side of the fork holder o is connected
by the lever with the bar m mounted in a rotatable manner under the breast beam
of the loom, which bar bears with an arm q against the fork arm t, and thus effects
the stopping of the loom at the required moment.
The levers are actuated by the cams on the axis a which is geared to the crank
shaft by means of toothed wheels ec. In looms where the shuttles only change on
one side, the axis a makes half as many revolutions as the crank shaft, as is the case
with many existing looms.
With looms in which the throw of the shuttle takes place several times consecutively
from one and the same side, the axis a makes the same number of revolutions as the
crank shaft, and is in addition so arranged that it can be shifted longitudinally to the
right or left. As in most looms where there is a consecutive change of weft, such as
in Smith's loom, the picker lever's motion is regulated by change cards, the donble
ended lever y pivotted at h, being made by its connection with to follow the
movement of the change cards of the picker levers, so as to rise and fall. If now
raised, the picker lever actuated by g will also be raised on this side, while the picker
lever on the other side will sink, owing to the opposite connection of g with i.
be
According to the present invention a lever d, pivotted at e to the framing, is
connected with the axis a and lever g, being connected to the latter to the left of the
pivot h. If now the picker lever he raised the part of the lever g to the left of the
pivot his lowered, and owing to the connection through the lever d the axis a is made
to shift to the right, while in the opposite case the axis a is moved back to the left
by d. By this means the axis a is moved to and fro accurately according to the
action of the change cards that regulate the picker motion, and thus the motion of
the levers is governed. The lever 7 on the left hand side will namely he raised when
the shuttle passes into the left hand shuttle box, and that on the right hand side
when the shuttle passes to the right hand side.
By the application of the shifting axis a and the lever regulated thereby in
combination with the lever pr that raises the weft thread, and the guard s, it is
rendered possible to make the stopping motion act only in accordance with the last
thrown thread, so that on the breaking hereof the loom is at once stopped.
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. The use in combination with the crank shaft of a power loom, of a shaft placed
parallel thereto and connected by levers to the picker lever arm whereby the said

page_text: shaft is shifted to the right or left according to the action of the picker lever change
cards, so that cams fixed thereon are made to raise either the right hand or the left
hand setting lever so as to act upon the hook of the weft fork when the weft breaks
and thus stop the loom, substantially as herein described.
2. The use of a lever mounted on the back of the lathe frame, whose front end
passes through the reed and raises the last thrown weft thread at the forward motion
of the lathe, so as to cause it to act upon the weft fork situated at such raised position,
in combination with a guard arranged over the shuttle race, beneath which the
shuttles are thrown, and which prevents the previously thrown weft threads from rising
beyond a certain height below the weft fork, so that this can only be acted upon by
the raised last thrown thread, substantially as herein described.
ABEL & IMRAY,
Agents for the Applicant.