An Improved Weft-thread Stop Motion for Looms.
Year: 1890

page_text: Date of Application, 29th Jan., 1890
Complete Specification Left, 29th Oct., 1890-Accepted, 29th Nov., 1890
PROVISIONAL SPECIFICATION.
An Improved Weft-thread Stop Motion for Looms.
We, WILLIAM MATTOCK, and Toм MATTOCK, both of No. 83, Lower Studley,
Trowbridge, in the County of Wilts., Weavers, do hereby declare the nature of this
invention to be as follows:-
-:
Our invention relates to improved apparatus for causing the stoppage of a loom
upon the breakage of the shoot or weft-thread.
According to our invention we provide a feeler which is adapted to oscillate upon a
horizontal axis and which, during the up and down movement of the sley or other
suitable part of the loom, is adapted to come into contact with and bear upon the
weft-thread. This oscillating movement of the feeler is effected through the medium
of a sliding bar having a cam-shaped recess formed therein, working in conjunction
with and acting upon a sliding rod or a projection thereon connected with a crank
secured to the axis of the said finger.
In the bottom of the cam-shaped recess is formed a projection against which, when
the weft-thread is broken so that the finger is allowed to fall below its normal position,
the sliding rod engages to prevent the reciprocation of the slide.
The said slide is positively moved in one direction by being connected to some
suitable part of the loom, for instance, the breast beam; in the reverse direction it is
operated by a spring which is compressed during the positive movement, and re-acts
through the medium of a lever bearing upon a stud secured to the said slide.
When, owing to the breakage of the weft-thread, the sliding rod engages with the
projection in the bottom of the cam-recess so as to prevent the lateral movement of
the slide, a crank pin or the like on the breast-beam or other moving part strikes
against the said stud, whereby motion is imparted to it, which motion is transmitted
through suitable rods or levers to the belt shipping mechanism, whereby the latter is
moved so as to throw the belt on to the loose pulley and thus stop the loom.
Dated the 29th day of January 1890.
G F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improved Weft-thread Stop Motion for Looms.
We, WILLIAM MATTOCK, and Toм MATTOCK, both of No. 83, Lower Studley,
Trowbridge, in the County of Wilts., Weavers, 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:-
Our invention relates to improved apparatus for causing the stoppage of a loom
upon the breakage of the shoot or weft-thread.
According to our invention we provide a feeler which is adapted to oscillate upon a
horizontal axis and which, during the movement of the sley or other suitable part of
the loom, is adapted to come into contact with and rest upon the weft-thread. This
oscillating movement of the feeler is effected through the medium of a sliding bar
having a cam-shaped recess formed therein, working in conjunction with and acting
upon a sliding-rod or a projection thereon connected with a crank secured to the axis
of the said feeler.
In the bottom of the cam-shaped recess is formed a notch with which, when the
weft-thread is broken so that the feeler is allowed to fall below its normal position, the
sliding-rod engages to prevent the reciprocation of the slide.

page_text: :
The said slide is positively moved in one direction by being connected to some
suitable part of the loom, for instance, the breast-beam in the reverse direction it is
operated by a spring which is compressed during the positive movement.
When, owing to the breakage of the weft-thread, the sliding-rod engages with the
projection in the bottom of the cam-recess so as to prevent the lateral movement of
the slide, a crank-arm or the like on the breast-beam or other moving part strikes
against a stud on the slide, whereby motion is imparted to the said crank-arm, which
motion is transmitted through suitable rods or levers to the belt-shipping mechanism,
thereby causing the latter to be moved so as to throw the belt onto the loose pulley
and thus stop the loom.
To enable our invention to be fully understood we will describe the same with
reference to the accompanying drawings in which
Figure 1 illustrates so much of a looin as is necessary to shew the application of our
invention thereto, the parts being represented in the closed position :
Figure 2 is a view of the same looking in the direction of the arrow Figure 1:
Figure 3 is a front view of my improved mechanism; and,
Figure 4 is a view similar to Figure 2 shewing the parts in their open position.
Figure 5 illustrates a modification.
a indicates a loom batten carrying the shuttle-race b, and c is the breast-beam. d is
the feeler which, as shewn, consists of two prongs secured to a boss e mounted upon a
horizontal axis having bearings in two brackets g, g projecting from a plate h
secured to the batten. i is a recess formed in the shuttle-race and adapted to receive
the feeler, so that it is at certain times out of contact with the material being woven.
jis the sliding-bar through the medium of which motion is imparted to the feeler, the
said bar being adapted to slide in guides k, k, k, k', the former of which are formed
in the brackets g, g, as shewn most clearly in Figures 2 and 3, whilst the latter k, k
are secured to the plate h. is the cam-shaped recess formed in the bar j, and mis
the sliding-rod, a projection n upon which enters the said recess so that, during the
reciprocation of the bar j, the rod will be raised and lowered, the said rod being
connected to a crank o on the axis f of the feeler. A spring p in conjunction with
the sliding-rod m serves to normally hold the projection n in contact with the cam-
surface of the recess. is the notch formed in the bottom of the said recess.
is a wire or rod, one end of which is connected to a lug
whilst the other end is connected to the breast-beam by a
batten is moved away from the breast-beam the said bar
direction indicated by the arrow in Figure 3. s is the spring which, during the move-
ment of the bar in the direction of the said arrow is compressed and serves to return
the bar to its normal position when the batten is again moved towards the breast-beam,
the said spring s at one end pressing against a lug t upon the har j, and at the other
end against a lug t¹ upon the plate h.
upon the sliding-bar j
slotted lug 72. As the
will be moved in the
is the stud upon the sliding-bar j, and v is the crank-arm mounted upon a shaft w
carried by the breast-beam and so arranged that, when the stud is in the position
indicated by dotted lines in Figure 1, it will be moved by the said stud to operate the
shaft w.
As shewn in the drawings the motion of the shaft w for throwing the belt onto the
loose pulley is utilized as follows, that is to say, upon one end of the shaft w is formed
a crank-arm which, when the shaft is operated, is designed to bear against a
lever y in connection with the belt-shipping lever and to push the same out of the
notch in which it normally rests, as shewn in full lines in Figure 1, into the position
indicated by dotted lines in Figure 3, so that the said lever is free to be moved along
the guide-slot z to the position indicated by dotted lines in Figure 1. A spring z¹ on
the shaft w serves to normally hold the crank out of contact with the lever y.
The operation of the apparatus herein before described is as follows:-Assume the
loom to be closed, that is to say, in the position shewn in Figures l'and 2; the sliding-
bar is now in its extreme left hand position, as shewn in Figures 1 and 3, the
feeler d being located within its recess i so as to be out of contact with the cloth or
other material, as indicated most clearly in Figure 2. As the loom is opened, the

page_text: bar j is moved to its extreme right hand position, whereby the feeler is raised between
the warp-threads, as shewn in Figure 4, owing to the action of the cam-surfaces upon
the projection n on the rod m. While the loom is in its open position the shuttle is
thrown, and then as the loom is gradually closed and the bar moves to the left band
under the action of the spring s, the feeler d is quickly lowered, owing to the peculiar
shape of the cam-surface so as to rest upon the shuttle thread. If this thread is
unbroken the feeler is supported thereon so that the projection n is prevented from
dropping into the notch q and consequently the loom is free to be closed, the said
feeler during the further closing movenient being drawn off the thread and dropping
into its recess, as shewn in Figure 2, thereby offering no obstacle to the beating home
of the thread. If, however, after the shuttle has been thrown the thread is broken,
then the feeler is unsupported, so that the projection n falls into the notch q, whereby
the bar is locked in the position indicated by dotted lines in Figure 3, that is to say,
with the stud u immediately opposite the crank v. As the closing of the loom
continues it will be obvious that the said stud will act upon the lever and operate
the shaft w to throw the lever y out of its notch and so cause the driving belt of the
loom to be thrown onto the loose pulley. During the part of the backward movement
of the baiten in which the bar j is locked the wire r will slide in the slot of the lug 2
and is thereby prevented from bending.
We sometimes modify the construction of the sliding-bar hereinbefore described by
forming a cam-slot in the same, as shewn in Figure 5, whereby the feeler will
be positively moved in both directions thereby rendering the use of a spring
unnecessary.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
a
1. Weft-thread stop motion for looms, comprising a reciprocating bar having
cam-groove or recess, and a feeler working in conjunction with the said sliding-bar,
substantially as, and for the purpose, described.
2. In a weft-thread stop motion for looms, the combination of the reciprocating bar
having the cam-groove or recess, the feeler, and the stud formed upon the reciprocating
bar, the latter being adapted, when the thread breaks, to be stopped in such a position
that the stud operates upon a lever to stop the loom, substantially as described.
3. The improved weft-thread stop motion for looms constructed and arranged to
operate substantially in the manner hereinbefore described and illustrated in the
accompanying drawings.
Dated the 29th day of October 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.