Year: 1886

page_text: Date of Application, 17th Nov., 1886.
Complete Left, 17th Aug., 1887.
Complete Accepted, 23rd Sept., 1887.
RESERVE
We, JAMES PATERSON, of Wood Terrace, Primrose Hill, Huddersfield, in the
County of York, Power loom-tuner, and TOM BROOK, of 75 Stable Street,, Huddersfield,
aforesaid, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to mechanism for automatically stopping power looms when
the weft fails to pass through the warps, as for instance, when the weft breaks, or runs
off the shuttle, or becomes foul.
According to this invention a suitable bearing is secured to the front of the slay
board at or about the middle of the loom. This bearing forms a carrier for the
ordinary weft fork and a guide for a sliding lifting bar hereinafter called the
lifting bar.
This lifting bar is made with a tapered portion and is provided with a suitable
notch or projection the arrangement being such that by sliding the said lifting bar
along the face of the slay board the weft fork, which is provided with an arm or
projection that bears upon the tapered part of the said lifting' bar, is partially rotated
on its axis to allow the shuttle and weft to pass.
The lifting bar is actuated by means of a connecting rod which is pivotted at one
end to the said bar, its other end being arranged to slide in and be guided by a
bearing, that forms an universal joint, secured to the inside of the breast beam.
When the slay board is in its back position ready for the shuttle to pass between the
warps, the hereinbefore mentioned connecting rod will have drawn the lifting bar
into such a position that the weft finger will be raised, whilst on the return stroke of
the lifting bar, if the weft be intact, the weft finger will drop onto the weft thread
and will allow the lifting bar to travel the full length of its stroke, but should the
weft be broken or have run off the shuttle or be otherwise not in position the weft
finger will drop into a recess cut in the slay board, and cause the arm or projection on
the weft fork to engage with the notch or projection on the lifting bar thereby
preventing the said bar completing its stroke or travel. The remaining portion of the
stroke or travel that would be given to the lifting bar by the connecting rod when the
weft is intact may in this case be taken up in compressing a spiral spring interposed
77

page_text: between the said rod and the means for operating it. The lifting bar is provided with
a projection so formed and arranged that when the lifting bar is in its arrested
position it may come into contact with and operate a suitably formed catch or lever
when the slay board advances. The catch or lever is held in position by another
lever (or cam) on the knocking off or strap guide shaft, the arrangement being such
that as the slay board advances towards the breast beam, the said projection on the
lifting bar causes the knocking off or strap guide to be released and the loom to be
stopped.
It is evident that mechanism according to this invention may be applied to either
fast or slow running looms for weaving.
Dated this 17th day of November 1886.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: Improvements in Automatic Weft Stop Mechanism for Looms.
We, JAMES PATERSON, of Wood Terrace, Primrose Hill, Huddersfield, in the
County of York, Power loom-tuner, and Tом BROOK, of 75 Stables Street, Hudders-
field, aforesaid, Engineer, do hereby declare the nature of this invention to be as
follows:
This invention relates to mechanism for automatically stopping power looms when
the weft fails to pass through the warps, as for instance, when the weft breaks, or
runs off the shuttle, or becomes foul.
According to this invention a suitable bearing is secured to the front of the slay
board at or about the middle of the loom. This bearing forms a carrier for the
ordinary.weft fork and a guide for a sliding lifting bar hereinafter called the
lifting bar.
This lifting bar is made with a tapered portion and is provided with a suitable
notch or projection the arrangement being such that by sliding the said lifting bar
along the face of the slay board the weft fork, which is provided with an arm or
projection that bears upon the tapered part of the said lifting bar, is partially rotated
on its axis to allow the shuttle and weft to pass.
The lifting bar is actuated by means of a connected rod which pivotted at one
end to the said bar, its other end being arranged to slide in and be guided by a
bearing that forms an universal joint, secured to the inside of the breast beam.
When the slay board is in its back position ready for the shuttle to pass between
the warps, the herein before mentioned connecting rod will have drawn the lifting bar
into such a position that the weft finger will be raised, whilst on, the return stroke of
the lifting bar, if the weft be intact, the weft finger will drop on to the weft thread
and will allow the lifting bar to travel the full length of its stroke, but should the
weft be broken or have run off the shuttle or be otherwise not in position the weft
finger will drop into a recess cut in the slay board, and cause the arm or projection
on the weft fork to engage with the notch or projection on the lifting bar thereby
preventing the said bar completing its stroke or travel.
in
The remaining portion of the stroke or travel that would be given to the lifting
bar by the connecting rod when the weft is intact may in this case be taken up
compressing a spiral spring interposed between the said rod and the means for
operating it.
The lifting bar is provided with a projection so formed and arranged that when the
lifting bar is in its arrested position it may come into contact with and operate a
suitably formed catch or lever when the slay board advances.
The catch or lever is held in position by another lever (or cam) on the knocking off
or strap guide shaft, the arrangement being such that as the slay board advances
towards the breast beam, the said projection on the lifting bar causes the knocking off
or strap guide to be released and the loom to be stopped.

page_text: It is evident that mechanism according to this invention may be applied to either
fast or slow running looms for weaving.
Referring to the accompanying sheet of drawings Fig. 1. is a plan or top view
shewing the mechanism attached to the slay board and breast beam and sufficient of a
loom for weaving to clearly illustrate our invention.
Fig. 2. is an end section shewing the levers and weft fork in position when the loom
is running.
Fig. 3. is a similar view with the weft fork down the levers released and the loom
stopped.
Fig. 4. is an enlarged view shewing the sliding cam or lifting bar drawn out its
full length of stroke and the weft fork up ready for the shuttle and weft to pass
through the warps.
Fig. 5. is an end elevation shewing the weft fork up.
Fig. 6. is a similar view to Fig. 4. only the weft is supposed to be broken and the
sliding cam or lifting bar caught before making its full stroke.
Fig. 7. is a detached view shewing a separate view of the sliding cam or lifting bar
and the attached slide block.
Fig. 8. is a plan or top view shewing the edge of the sliding cam or lifting bar
with the projection for forcing the weft fork down for quick running looms.
A suitable frame A. is secured to the front of the slay board B at or about the
middle of the loom, it forms a carrier for an ordinary weft fork B₁ composed of one
or two steel prongs or fingers B'B' secured to a suitable crosshead or axis C. having
a projection or short arm (³ for sliding on the upper edge of a sliding lifting bar D.
The said crosshead is also provided with another arm or stop C Fig. 5. so as to.
prevent it being overturned and also for bringing the weft fork quickly down when
employed on quick running looms.
The weft fork is mounted so as to partially rotate on centres or pointed set
screws E. E. screwed into brackets A'A' on the frame A. and provided with locking
nuts as shewn in Figs. 1. 4. and 6.
The upper edge of the sliding cam or lifting bar D. is shaped as clearly shewn in
detached view Fig. 7.
There are two cams or inclined portions D' and D on the edge, the lesser D¹
forming a detent or projection as shewn at D³ whilst there is also another cam or
inclined portion D₁ on the side of the said sliding bar.
The arrangement is such that by sliding the bar D. in one direction along the face
of the slay board B. the arm (Fig. 5. which bears on its upper edge is thereby
raised thus causing the weft fork B₁ to partially rotate, so as to allow the shuttle and
weft to pass and that by sliding it in the opposite direction the cam or inclined
portion D will press against the arms C² and drive the weft fork down.
The cam or lifting bar D. is made of a thin steel plate and may have the pro-
jections D dished or stamped out to the required shapes or it may be of cast metal.
It is guided and retained at one end in an upright position by passing through guide
slots formed in the brackets A' A¹ Figs. 4. 5 and 6. whilst at its other end is attached
to a suitable guide or slide F. working in a slide on the frame A. as shewn.
This guide or slide F is formed with a projecting portion or stop G. which under
certain conditions hereafter explained comes in contact with a regulating set screw
secured in a knocking off lever H. Figs. 1. 2 and 3.
To this guide or slide F. one end of the connecting rod K. is attached by a pin
joint J. as shewn in Figs. 1. 4. and 6.
The other end of the connecting rod K. slides through a bearing formed by an eye
bolt L Fig. 1. which is carried by a socket in a bracket M. securely fixed to the inside
of the breast beam N. as shewn in Fig. 1. thus forming a double joint to allow the
slay beam B. to move to and fro when the loom is running.
Near one end of the connecting rod K. a collar K' is provided, whilst between it
and the bearing L. an encircling spiral spring O. is inserted and a stop pin at the
extreme end of the rod is provided to prevent the rod leaving the bearing L.
The spring O. is of sufficient strength to push the lifting bar D. along whilst the

page_text: weft is intact and the weft fork held up, and retains the pin at the extreme end of
the connecting rod K. against the bearing L.
When the slay board B. is in its back position ready for the shuttle to pass between
the warps, the connecting rod K. will have drawn the lifting bar D. into the position
shewn in Fig. 4. and the weft finger B¹ will be raised as shewn in Fig. 5. whilst in
the return stroke of the lifting bar D. if the weft be intact the weft finger B' will
drop or be sufficiently forced down through the warps by the cam D to rest onto the
weft thread when intact as shewn in end view Fig. 2. thereby allowing the lifting
bar D. to travel the full length of stroke, but should the weft be broken or not pass
through the warps the weft fork B₁ will drop still further into the recess cut in the
slay board B. and cause the arm or projection C¹ on the weft fork axis to catch
against the notch D' on the lifting bar D. as shewn in Figs. 3. and 6. thereby preventing
the said bar from travelling any further.
The remaining portion of the stroke or travel that would be given to the lifting
bar D. is taken up in the connecting rod by compressing the spiral spring O.
The knocking off lever H. is pivotted to a bracket H₁ secured to the inside of the
breast beam N. as shewn in Figs. 1. 2. and 3.
It is in such a position that the before mentioned stop or projection G. shall be in
a line and come into contact with it as the slay board B. advances towards the breast
beam N. that is when the weft fork B¹ has caught in the notch D' as shewn in Fig. 3.
then the lifting bar D. will be retained in the position shewn in Fig. 6.
The arrangement being such that as the slay board advances towards the breast
beam N. the projection G. will travel past clear of the knocking off lever H. whilst
the weft fork is supported by the weft, and as soon as the weft fails to support the
weft fork the projection G. will be retained in the position shewn in Fig. 3. and as
the slay board B. advances towards the breast beam N. the knocking off lever H. will
be moved, thereby forcing the lever P. on starting shaft Q. out of the way as shewn
in Fig. 3. thus automatically stopping the loom.
The length of the connecting rod may vary according to the stroke of the slay
board, thus with a long stroke the connecting rod will require to be somewhat longer,
but for a loom having an ordinary length of stroke say about eight inches for example
we should arrange for the connecting rod being about twenty inches long.
With some classes of looms we find is advantageous to employ two weft stop motions,
in that case we use only one connecting rod K. and attach the two lifting bars together
by a rod or link, so that should a weft break or fail after passing one weft fork the
second one would come into action and cause the loom to stop.
Thus it will be understood by employing mechanism of the kind referred to no
complicated fitting is required, the weft stop motion is easily fixed and requires little
or no attention and is more certain in action than other weft stop motions where cams,
bent levers, or the like are employed for raising and lowering the weft fork.
We do not lay any general claim to a weft stop mechanism answering the same
purpose as before described as we are aware that such have been worked by means of
bent levers, wedges or other mechanism requiring careful adjustment on the loom.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, we declare that what we claim is :-
1. In an automatic weft stop motion, a cam or lifting bar travelling to and fro on
the slay board, and provided with a projection or detent which comes in contact with
and is arrested by the weft fork when the weft is not laid in the shed substantially as
described.
:-
2. In an automatic weft stop motion a cam or lifting bar carried on the slay board
and provided with a projection or detent which comes in contact with and is arrested
by the weft fork when the weft is not laid in the shed, and with an incline which
raises the weft fork to permit of the passage of the shuttle substantially as described.
3. In an automatic weft stop motion a cam or lifting bar carried on the slay board,
and provided with a projection or detent which comes in contact with and is arrested

page_text: by the weft fork when the weft is not laid in the shed, and with inclines which raise
and depress the weft fork at suitable times substantially as described.
4. In an automatic weft stop motion moving the weft fork towards or on to the weft
by mechanism such as a cam, substantially as described.
5. In an automatic weft stop motion the combination with a cam or lifting bar,
such as referred to in claim 1. of means which will cause it to move to and fro so long
as it is not arrested by the detent but will permit of its being stopped suddenly
substantially as described.
6. In an automatic weft stop mechanism the combination of a sliding cam or lifting
bar with a connecting rod or link K. and spiral spring O. substantially as described
and for the purpose specified.
7. A weft stop mechanism comprising a sliding cam or lifting bar such as referred
to in claim 1. a projection G. and a knocking off lever H. substantially as described.
8. An automatic weft stop mechanism comprising a weft fork B₁ a sliding cam or
lifting bar D. provided with a projection D³ that clears the weft fork normally but
engages with it when the weft is broken, a spring rod K. for operating said sliding
cam or lifting bar from the breast beam the whole so arranged that when the sliding
cam or lifting bar is engaged by the weft fork as aforesaid the knocking off lever will
be moved by a stop on the sliding or lifting bar substantially as described.
Dated this 12th day of
1007
August
Witness:
F. M. C. SCOTT,
Patent Agent,
89, Victoria Street, Liverpool.
JAMES PATERSON.
TOM BROOK.