AN IMPROVED WEFT STOP MOTION FOR LOOMS
Year: 1885

page_text: I, CHARLES BEDFORD of Huddersfield Road, Birstall, near Leeds, Yorkshire,
Machine Shop Manager, do hereby declare the nature of my invention for
"AN IMPROVED WEFT STOP MOTION FOR LOOMS," to be as follows:-
**
My invention has reference to that class of weft stop motion where the weft
feelers work in a groove formed about the middle of the slay board.
According to my invention I employ the usual form of feelers attached to an
oscillatory boss working freely upon a stud.
This feeler is caused to lift out of the groove in the slay just before a line of weft
is sent across the loom, and the said feeler is allowed to descend just after the weft
is sent across, so that if there is weft present, the feelers cannot descend into the
groove, consequently the loom would continue to work; if however the weft was
absent through breakage or other cause, the feelers would descend into the groove
the effect of which would be to stop the loom.
The mechanism I employ for lifting the feelers consist of a hinged bar or plate
which as the slay is receding from the breast beam is caused to move sideways by
a cam or inclined rod, the sideway motion of the said bar or plate causing a
projection thereon to come in contact with a tail piece on the boss carrying the
feelers, whereby such boss is caused to oscillate and throw the feelers up, but as
soon as the projection leaves the tail piece, the boss oscillates back allowing the
feelers to descend and if weft be present the tail piece is prevented from coming in
contact with a second projection on the hinged plate or bar, thus allowing the
hinged plate or bar to fall or move away and thus avoid contact with a dagger or
projection connected to the ordinary arrangement for moving the driving belt or
strap, but if the weft is absent, the feelers descend into the groove to such an
extent that the tail piece is allowed to catch the second projection on the hinged
bar which is thus prevented from going back to its normal position again,
consequently when the slay beats up, the dagger or other projection is displaced
or moved by coming in contact with the said hinged plate or bar, and the stop rod
operated in such manner as to throw the driving strap from the fast pulley onto the
loose one and stop the loom.
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page_text: C
I, CHARLES BEDFORD of Huddersfield Road, Birstall, near Leeds, Yorkshire,
Machine Shop Manager do hereby declare the nature of my invention for "AN
IMPROVED WEFT STOP MOTION FOR LOOMS" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
My invention has reference to that class of weft stop motion where the weft
"feelers " work in a groove formed about the middle of the slay board.
According to my invention I employ the usual form of feelers attached to an
oscillatory boss working freely upon a stud.
This feeler is caused to lift out of the groove in the slay just before a line of weft
is sent across the loom, and the said feeler is allowed to descend just after the weft
is sent across so that if there is weft present, the feelers cannot descend into the
groove, consequently the loom would continue to work; if however the weft was
absent through breakage or other cause, the feelers would descend into the groove,
the effect of which would be to stop the loom.
In order that my invention may be better understood, I will now make reference
to the accompanying sheet of drawings wherein Fig. 1 is side elevation of my
improved weft fork mechanism showing the slay board A at its furthest stroke
from the breast beam B, which is the position the parts occupy when the shuttle
is crossing the loom. Fig. 2 is plan view of same and Fig. 3 is back or inside view
looking in at the arrow a.
To the front of the slay board I fasten a bracket C by screws or other means,
Buch bracket being provided with lugs b for receiving the studs c projecting from
the boss d carrying the needles or feelers e, which boss and feelers oscillate as
hereinafter explained.
D is a plate hinged to the bracket C by bolt E upon which it is free to oscillate
by means of the inclined rod F which bears against the part f of the oscillating
plate D. The rod F is stationary and is secured to the breast beam at G, the
forward end thereof passing through an opening or aperture made in the bracket C,
so that as the slay recedes backward and forward to and from the breast beam the
hinged plate D is caused to oscillate; its own weight ensures that it follows or
bears upon the inclined rod F. A lug or tail piece g projects from the boss d for
the purpose of being acted upon by projections h and i projecting from the upper
part of the oscillating plate D, the projection h being employed for tilting the tail
piece so as to raise the feelers to their highest point and the projection i is
employed for catching against the tail piece if there is no weft present as seen in
Figures 6 and 7 so as to prevent further oscillatory movement of the plate D.
Therefore when the plate D oscillates, the cammed projection h causes the boss d
also to oscillate with it, whereby the "feelers" are lifted and this is timed to take
place just before the shuttle crosses the loom the descent of the feelers being
effected just after the shuttle has crossed the loom by the weight of the boss d and
tail piece g which is sufficient for that purpose, and this takes place when the

page_text: cammed projection h of the oscillating plate is removed from under the tail piece g
and.ceases to support it.
Fig. 4 is side elevation, and Fig. 5 back view of the several parts and the
positions they occupy when the slay has "beaten up" to the breast beam, and the
weft thread is present to hold up the feelers in which case the tail piece g is held.
up as shown in Fig. 4 allowing the oscillating plate D to descend so far as that the
projection H on the said plate will pass under the finger I fixed to shaft J, but
if the weft was absent the "feelers" would descend into the groove L in the slay
(see Fig. 6) in doing which the tail piece g would immediately drop into position
shown in Figures 6 and 7, so that when the plate D was oscillating back the
projection thereon would catch against the tail piece (see Fig. 8 consequently
the plate would be prevented from any further movement so that at the next
"beat up" the projection H which is now in a line with the finger I would be
struck so as to. oscillate the shaft J in such manner as to throw the strap off the
fast pulley.
It will therefore be clearly understood that every time the shuttle crosses the
loom, and leaves a line of weft that the feelers e immediately descend and rest
upon the weft thread, consequently the tail piece g does not come into the way to
catch the projection i projecting from the oscillating plate D so that the plate
oscillates far enough as to allow the projection H to pass underneath the finger I,
but if the weft was absent the feelers e would descend into the groove cut in the
slay-board, the effect of which would be to throw the tail piece g into such a
position that when the plate D commenced to oscillate back again, the projection h
would be caught hold of by the tail piece in such manner as to prevent any further
movement of the plate D, consequently the projection H thereon would be opposite
the finger I as seen in Figures 6 and 7 therefore at the next " beat up" the
projection H would strike the finger I and stop the loom.
Fig. 8 is plan of plate D with its two projections h and i. If weft is absent the
tail piece g catches the lug i and stops any further movement of the plate D, but
if weft is present the tail piece would not reach the lug i but would remain in
position shown in dotted lines.
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 as my invention is;
The use of the rocking plate D having the double projections h and i thereon;
working in combination with the tail piece g, all operated in the manner and for
purposes substantially as set forth.