Improvements relating to Stop-motions for Looms.
Year: 1899

page_text: Date of Application, 8th Apr., 1899
Complete Specification Left, 11th Dec., 1899-Accepted, 10th Feb., 1900
Improvements relating to Stop-motions for Looms.
We, FRIEDRICH PICK and RUDOLF PICK, both of Nachod, Bohemia, in the
Empire of Austria, Proprietors of a Weaving Mill, do hereby declare the nature
of this invention to be as follows;
This invention relates to stop motions for looms and its construction is based on
the following observations.
When the internal width of the loops of the metal wires of the heddle is
slightly in excess of the thickness of the shaft it will be evident that the said
wires at the sinking of the heddle through the pull from the lower shaft have a
tendency to rise on account of the tightly stretched threads and this causes the
upper portion of the loop to recede from the upper edge of the top shaft.
Should the thread break during depression or be lowered after it has broken
no-upward pressure can be exerted on the heddle wire in connection with it and
consequently the separation of the loop from the upper edge of the shaft cannot
occur so that the loop rests on its shaft the same as during the raising of the
warp into the upper position. This also happens in an analogous manner when
the warp becomes slack.
Now if all the said wires of one heddle were connected to one of the poles of an
electric source and the upper shaft thereof be connected to the other pole of this
source of electricity it will be evident with the shaft acting only by its upper
portion and being otherwise insulated, that the circuit may be closed between
wire loops and the said shaft only when the warp threads are raised into the upper
shed, or also, after the breaking of one of the warp threads when the shaft and
thread corresponding to such is lowered.
If it be desired to effect the closing of the circuit only at the breaking of a
thread it will be necessary to prevent the closing of the circuit by the raising of
the shaft, and only allow it to take place, in the manner described, when the thread
breaks or when it becomes too slack.
In order to prevent the closing of the circuit through the raising of the shaft
a contact device is interpolated in the circuit whereby the latter is opened or
interrupted at the raising of the shaft but closed at the lowering of the same, or,
in other words, circuit closing between the loops of the wires and the corresponding
shaft can only occur at the lowering of such shaft and is thus dependent on this."
As has already been stated the loops of the wires are somewhat longer than
ordinarily and they are of such an internal width as to allow for easy play on the
shafts which, with the exception of their upper edge are covered with insulating
material.
The wires are advantageously connected to the source of electricity by means
of a metallic wire inserted between the various wires in the manner of the weft
formation in linen, and attached by one end to one of the poles of a battery,
while at the same time an electro magnet is interposed in the open circuit thus
formed for use in connection with the stop motion.
The completion of the circuit may be effected through any one of the contacts
which may become closed at the lowering of the heddle and such completion of
the circuit may advantageously be obtained through the intervention of a
treadle which is arranged to press a contact spring against a suitable fixed contact.

page_text: Obviously the arrangement of treadle contact may be replaced by any kind
of device adapted to move synchronously with the heddle.
Furthermore instead of forming contacts at the breaking of the threads between
the upper edge of the upper shaft and the upper portion of the eye, the lower
shaft may be arranged, in the same manner, to make contact with the upper
portion of the lower eye. The breaking or the slackening of a thread then causes
its wires at the next lowering of the under shed to close the circuit from the
battery thereby operating the electro magnet and so stopping the loom.
This arrangement is entirely independent of the number of healds, because the
wires of each of the healds with the contact arrangement for closing the circuit in
conjunction with the electromagnet adapted to act on the stop motion, either form
an open or closed circuit according to requirement, thus forming as many parallel
lines or circuits as there are healds.
Dated this 8th day of Anvil 1800
"
HASELTINE, LAKE & Co.;
45, Southampton. Buildings, London, W.C.,
Agents for the Applicants.
HASELTINE, LAKE & Co.;
45, Southampton. Buildings, London, W.C.,
Agents for the Applicants.
.f.
COMPLETE SPECIFICATION.
Improvements relating to Stop-motions for Looms.
We, FRIEDRICH PICK and RUDOLF PICK, both of Nachod, Bohemia, in the
Empire of Austria, Proprietors of a Weaving Mill, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:
This invention relates to stop motions for looms and its construction is based on
the following observations; which in order that my invention may be clearly
understood I will describe with reference to the accompanying drawings:
When as shown in Figure 1, the internal width of the loops or sockets 2 of the
metal wires of the heddle, is slightly in excess of the thickness of the shaft 1 it
will be evident that the said wires 5 at the sinking of the heddle through the
pull from the lower shaft or bar 6 have a tendency to rise on account of the tightly
stretched threads, and this causes the upper portion of the loop or socket 2 to
recede from the upper edge 4 of the top shaft or bar 1 and to take up the position
shown in Figure 1.
Should the thread break during depression, or be lowered after it has broken,
no upward pressure can be exerted on the heddle wire in connection with it, and
consequently the separation of the loop or socket from the upper edge of the
shaft or bar 1 cannot occur so that the loop rests on its shaft or bar the same
as during the raising of the warp into the upper position. This also happens in
an analogous manner when the warp becomes slack.
Now if all the said wires 5 of one heddle were connected to one of the poles of
an electric source 9 and the upper shaft or bar thereof be connected to the other
pole of this source of electricity it will be evident, with the shaft or bar acting
only by its upper portion 4 and being otherwise insulated, that the circuit may be
closed between wire-loops 2. on the shaft 1 only when the warp threads are raised
into the upper shed, or also, after the breaking of one of the warp threads when
the shaft and thread corresponding to such is lowered.
If it be desired to effect the closing of the circuit only at the breaking of a
thread it will be necessary to prevent the closing of the circuit by the raising of
the shaft, and only allow it to take place, in the manner described with reference
to Figure 2, when the thread breaks or when it becomes too slack.
In order to prevent the closing of the circuit through the raising of the shaft
a contact device is interpolated in the circuit whereby the latter is opened or

page_text: interrupted at the raising of the shaft but closed at the lowering of the same, or,
in other words, circuit closing between the loops of the wires and the corresponding
shaft can only occur at the lowering of such shaft and is thus dependent on this."
As has already been stated the loops 2 of the wires are somewhat longer than
ordinarily and they are of such an internal width as to allow for easy play on the
shafts which, with the exception of their upper edge 4 are covered with insulating
material 7.
The wires are advantageously connected to the source of electricity 9 by
means of a metallic wire 8 inserted between the various wires 5 in the manner
of the weft formation in linen as shown in Figure 4, and attached by one end to
one of the poles of a battery, while at the same time an electro magnet. 14 is
interposed in the open circuit thus formed for use in connection with the stop
motion.
The completion of the circuit may be effected through any one of the contacts
which may become closed at the lowering of the heddle and such completion of
the circuit may advantageously be obtained through the intervention of a
treadle 10 which is arranged to press a contact spring 12 against a suitable fixed
contact 11.
Obviously the arrangement of treadle contact may be replaced by any kind
of device adapted to move synchronously with the heddle.
Furthermore instead of forming contacts at the breaking of the threads between
the upper edge 4 of the upper shaft 1 and the upper portion of the eye 2, the lower
shaft 6 may be arranged in the same manner, to make contact with the upper
portion of the lower eye 13. The breaking or the slackening of a thread then
causes its wires at the next lowering of the under shed to close the circuit from
the battery 9 thereby operating the electro-magnet 14 and so stopping the loom.
This arrangement is entirely independent of the number of healds, because the
wires of each of the healds with the contact arrangement for closing the circuit in
conjunction with the electromagnet adapted to act on the stop motion, either form
an open or closed circuit according to requirement, thus forming as many parallel
lines or circuits as there are healds.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. An electro magnetic stop motion for weaving looms which is operated
through the breaking of any warp thread, characterized by the fact that the
electro magnet 14 of the stop motion is interposed in a circuit adapted to be closed
through the depressing of the heddle and opened through the raising of the same
and in which the upper or (in some cases both) the lower shaft is connected in
parallel with the same series of wires 5 of the heddle substantially as described.
2. In an arrangement as claimed in Claim 1, wires 5, provided with loops of
greater, width than the supporting shaft 1 substantially as herein described.
3. In an arrangement as claimed in Claim 1, in which the shafts are with the
exception of their upper edge covered with insulating material substantially as
described.
4. In the arrangement as claimed in Claim 1 the contact device between the
various heddle wires 5 with the source of electricity consisting of a metallic wire 8
threaded in the said wires in the manner of the weft in linen weaving substantially
as herein described and illustrated by the accompanying drawings.
Dated this 11th day of December 1899
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, WC.
Agents for the Applicants.