Improvements in Warp Stop Motions of Looms for Weaving.
Year: 1899

page_text: Date of Application, 8th July, 1899-Accepted, 19th Aug.,
1899
COMPLETE SPECIFICATION.
Improvements in Warp Stop Motions of Looms for Weaving.
I, EDWARD HOLLINGWORTH,, of Hutchinson, Hollingworth and Company, Limited,
of Dobcross Loom Works, Dobcross, in the County of York, Loom Makers, do
hereby declare the nature of this invention and in what manner the same is to
be performed (which has been communicated to me by William Arthur, of
Lawrence, in the County of Essex, and State of Massachusetts, in the United
States of America), to be particularly described and ascertained in and by the
following statement:―
My invention relates to looms, and more particularly to warp stop motions of
loouis, in which the drop devices are so located in the loom as not to rise aud'
fall with the harnesses. but are independent of the shedding mechanism.
I find by the practical using of warp stop motions which are located behind
the harnesses, that as heretofore, constructed, dirt and lint will be collected upon
the guide bars, and in the slots of the drop devices through which the guide bars
pass, so as to encumber the operation of the motion and require the loom to be
occasionally stopped, and the dirt and lint removed from the slots of the drop
devices. In order to overcome this difficulty, I have placed the guide bars above
the warp and out of the way of the falling dirt, and I make the drop devices
with an elongated slot near their upper ends for the guide bar to pass through
and support the drop devices in position, and a hole or opening below the slot
for the passage of the warp threads, with an elongated portion below the opening.
The guide bars are made flat to support and guide the drop devices in position,
and they are fixed to or supported by suitable stands carried on the frame of the
loom. Below the guide bars at each side of the drop devices I place a supporting
bar or rest for the warp threads to rest upon, and hold all of the drop devices
supported normally, approximately in the plane of the warp.
These warp
supporting bars are adjacent to the sides of the drop devices, but with a free space
between them; to allow of the ready removal of dirt and lint which may collect
during the process of the weaving.
By this arrangement of guide bar, drop devices and warp rest or bar, I am
enabled to leave an uninterrupted space between the drop devices and the warp
supporting bar or rest.
I have shewn in the drawing a portion of a loom sufficient to illustrate my
improvements applied thereto.
In the accompanying drawing, 1 is the warp beam, 2 the warp threads passing
from said beam over the back roll 3, and over the supporting bars 4 and 5, upon
which the warp threads rest, and through openings 6 in the drop devices 6, and
then over the front supporting bars 7 and 8 to the harnesses, not shewn, in the
ordinary way. The edges of the drop devices 6 are not contiguous to the edges
or sides of the supporting bars 5 and 7, but are parallel and adjacent thereto, and
a space of more or less width is left between the adjacent edges, as shewn in
the drawing.
The drop devices 6, 6, are provided with elongated slots 6" at their upper ends,
through which the stationary transverse flattened guide bars 9,9, extend, over

page_text: the warp threads, and from one side of the warp to the other. It will be
nuderstood that there is a drop device 6 for each warp thread.
The stationary transverse bars, 9, 9, are made flattened, as shewn in the drawing,
and about half the width in a vertical plane of the length of the slots 6" in the
drop devices 6.
By making the bars 9, 9, flat, as shewn in the drawing, and
locating them in the slots 6" of the drop devices 6, said bars act to guide and
direct the movement in a vertical plane of each of the drop devices and hold them
in their proper position at their lower ends, so that they will be engaged by the
knife or blade 10 to be hereinafter described.
At the same time, the bars 9. act to support the drop devices, when the warp
threads break, and limit their downward movement.
The normal position of the drop devices 6 is that shewn at the left in the
drawing, the drop devices being held up by the warp threads passing through
the holes 6 therein, in the usual way.
In case of the breaking of a warp thread, the drop device with which the warp
thread is connected drops down by gravity to the position shewn at the right in
the drawing, guided by the bar 9 and the lower end of the drop device extends
in the path of the knife or blade 10 which extends transversely across the loom
from one side of the warp to the other, and is supported on arms 11 fast on
rock shaft 12, to which a rocking motion is communicated by mechanism, not
shewn, in the ordinary way, and which is connected with the shipper device of
the loom, to stop the loom in case the blade 10 engages with the drop devices 6.
It will be understood that I do not limit myself to the exact construction shewn
in the drawing and above described; but any equivalent form of drop device, as
wires, may be substituted for the drop devices shewn. I have aliewn in the
drawing two sets of guide bars, drop devices, and supporting bars, but only one
set may be used if desired.
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 warp stop motion for looms, a series of drop devices independent of the
shedding mechanism, and each provided with an elongated slot and a warp eye
below it, a flat supporting bar passing through said elongated slot, and serving
to guide the drop devices, warp rests or supporting bars located on opposite
sides of the series of drop devices, and having uninterrupted space between them
for the ready removal of lint or dirt, substantially as shewn and described.
2. In a warp stop motion for looms, a series of drop devices independent of the
shedding mechanism, and each provided with an elongated slot and a warp eye
below it, a flat supporting bar passing through said elongated slot, and serving
to guide the drop devices, a warp rest or supporting bar located approximately
in the plane of the warp when in normal position, and presenting a free space
between the rest and drop devices for the ready removal of lint and dirt, substan-
tially as shewn and described.
Dotad this 7th day of Tulu 1800
TASKER & CROSSLEY,
Patent Agents, Halifax, Agents for Applicant.