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Патент USA US2403497

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July ‘9, 1946.
2,403,497
R. E. BRIDGE
AUTOMATIIC STOPPING 0F LOOKS
Filed May 1, 1945
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2,403,497‘
Patented July 9, 1946
UNITED STATES PATENT OFFICE
2,403,497
AUTOMATIC STOPPING OF LOOMS
Richard Edwin Bridge, South Harrow, England
Application May 1, 1945, Serial No. 591,345
In Great Britain March 20, 1945
4 Claims.
(Cl. 139-204)
1
2
This invention relates to means for the
automatic stopping of a loom comprising a
shuttle provided with a hook-like member which,
when owing to some fault the shed is not formed,
diametrally at f, Figures 3 and 7, to accommodate
a lever g pivoted on a pin h, the lever a being
formed with a double-hook-like part i and being
in?uenced by a spring k tending to urge the
is projected automatically into the path of the 5 double-hook-like part 7' through a slot m, Figures
2 and 7, in the tube a, while at its upper part
ballooning weft thread, so as to cause the latter
to break and bring about automatic stoppage of
the lever g is formed with a head 11.
At its upper end the body b is slotted diam
the loom in a known manner. The hook-like
etrally at 0, Figures 1, 2 and 6, at right angles
member of such means may be controlled by a
pair of pivotally mounted tripping pieces, having 10 to the general plane of the slot f and in this slot
0 are pivoted on pins 11 17 two overlapping trip
oppositely inclined faces, and engaging one
ping pieces q r, from one (I, of which a pin 8
another on a plane between their pivotal axes,
one of said tripping pieces being spring in?u
projects into a slotted eye t formed in the other r.
Integral with the tripping piece q is an arm
enced and having in one therewith a spring
or latch piece u, urged by a spring 0 so that, nor
in?uenced latch piece which, normally, extends
mally, it intersects the path of the head 11 of the
across the path of the lever by which the hook
lever g and thereby holds said lever in its “set”
like member is carried, said hook-like member
position, as shown especially in Figures 2 and 3.
being itself in?uenced by a spring tending to
project it into the path of the ballooning weft
w is a sleeve on a cross pin a‘ serving as a stop
thread, the arrangement being such that, when 20 for limiting the outward movement of the lever 9
,a perfect shed is not formed, the path of the
and its double-hook-like part 1.
Each of the tripping pieces 9‘ 1‘ is formed with
inclined face of the one or the other of the
tripping pieces is intersected by the warp or
an inclined face y projecting slightly from the
twist threads, whereupon both tripping pieces are
top end of the tube a which is bevelled as at
z, Figures 2 and 4, to conform with the shape of
turned about their pivot (owing to their engage
the adjacent part of the shuttle 8.
ment with one another), the latch piece is caused
During normal weaving the upper shed of the
to turn about the pivotal axis of the tripping
piece to which it appertains and is displaced
warp is raised to the position indicated by the
laterally with respect to the lever by which the
line H, Figure 2, in relation to the shuttle S,
hook-like member is carried thus releasing said 30 while under the effect of centrifugal force, the
lever to the action of its spring to project the
weft balloons in said shuttle as indicated by the
hook-like member into the path of the bal
circular series of dots l2
‘ which repre
looning weft thread.
sent a transverse action of the weft in successive
positions. If, during weaving, the twist ?oats,
One form of the invention is shown by
accompanying drawing, in which Figure 1 is a
i. e. a shed is not formed perfectly, even by the
plan of a shuttle; Figure 2 is an enlarged frag
breaking of a single warp thread, a bunch of
' mentary sectional elevation substantially on the
warp threads is pulled down to the position ll’
line 2-2, Figure 3, and Figure 3 is an enlarged
Figure 4, and engages the one or the other of
fragmentary sectional elevation substantially on
the inclined faces 31, causing both of the tripping
the line 3-3, Figure 2, the parts being shown 40 pieces q r and the latch piece it to be moved to
in their “set” or normal positions; Figures 4 and
the position shown in Figures 4 and 5. This
5 are sectional elevations corresponding with
movement of the latch piece u releases the lever
Figures 2 and 3, respectively, but show the parts
g to the action of its spring k and the double
in their operative or abnormal positions; Figures
hook-like part 7‘ is projected through the slot m
6 and 7 are sectional plans on the lines 8-6, 45 into the path of the ballooning weft thread (as
Figure 3, and 1-1, Figure 2, respectively.
‘indicated in Figure 5) which is thus broken and
The improved device involves only the drilling
brings about the stopping of the loom in a known
manner.
of a hole in the back side of a shuttle S, and it
comprises a tube a in which is ?tted a body b
After the necessary repair has been effected,
slotted to receive the movable parts as set forth 50 the parts may be “re-set” by pressing back the
hereinafter. The body b is formed at its lower
double-hook-like part 7' through the slot m,
end with a diametrai tongue 0 which is received
whereupon the spring 1; moves back the latch
in a corresponding slot in the plugged lower end
piece u into the path of said part to retain it in
d of the tube a, the parts being retained in
' position by a cross pin e. The body I) is slotted 55
its “set” position.
The use of the safety device of this invention
r
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2,403,497
3
4
involves only the drilling of a hole in the back
side of a shuttle and it follows that it may be
incorporated readily into existing shuttles as
3. Means for the automatic stopping of a loom
comprising a shuttle provided with a hook-like
member which, when owing to some fault the
well as during the manufacture of new shuttles.
I claim:
shed is not formed, is projected automatically
into the path of the ballooning weft thread, so
as to cause the latter to break and bring about
1. For ?tting into a bore in the side of a
shuttle for the purpose of effecting the automatic
stopping of a loom, a tubular casing, a hook-like
member pivotally mounted in said casing, a
automatic stoppage of the loom in a known
manner, a spring in?uenced latch piece, a pair
of pivotally mounted tripping pieces, said latch
spring tending to urge said hook-like member to
project through a slot in said casing, a spring
pieces and said tripping pieces having oppositely
in?uenced latch piece, normally extending across
said hook-like member and holding it against
plane between their pivotal axes, the hook-like
piece being in one with one of said tripping
inclined faces and engaging one another on a
the action of its spring, a pair of interconnected
member being spring in?uenced and, normally,
tripping pieces pivotally mounted in said casing 15 held in an inoperative position by the spring
and projecting beyond one end thereof, said latch
piece being connected with one of said tripping
pieces and being movable therewith when said
tripping piece is moved about its pivot.
in?uenced latch piece which is in one with one
of the pair of pivotally mounted tripping pieces,
the arrangement being such that, when a perfect
shed is not formed, the path of the inclined face
2. For ?tting into a bore in the side of a 20 of the one or the other of the tripping pieces is
intersected by the warp or twist threads, where
stopping of a loom, a tubular casing, a hook-like
upon both tripping pieces are turned about their
member pivotally mounted in said casing, a
pivots, the latch piece is caused to turn about
shuttle for the purpose of e?ecting the automatic
spring tending to urge said hook-like member
its pivotal axis with respect to the hook-like
to project through a slot in said casing, a spring 25 member, thus releasing said member to the
in?uenced latch piece, normally extending across
action of its spring and projecting its hook-like
said hook-like member and holding it against
end into the path of the ballooning weft thread.
the action of its spring, a pair of interconnecting
4. For ?tting into a bore in the side of a
tripping pieces pivotally mounted in said casing
shuttle for the purpose of effecting the automatic
and projecting beyond one end thereof, said 30 stopping of a loom, a tubular casing in which are
latch piece being connected with one of said '
pivotally mounted a spring in?uenced hook-like
tripping pieces and being movable therewith
member, a pair of interconnected tripping pieces
when said tripping piece is moved about its pivot,
and a spring in?uenced latch piece, the hook-like
said tripping pieces overlapping one another and
member being normally held in a “set” position
being pivoted on parallel axes, said tripping 35 by the spring in?uenced latch piece, which is
pieces having a pin and slot connection between _ movable with one of said tripping pieces.
their overlapping parts and having bevelled
faces at their projecting ends.
RICHARD EDWIN BRIDGE.
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