An Improved Weft Stop Motion for Looms.
Year: 1887

page_text: Date of Application, 14th Dec., 1887
Complete Specification Left, 13th Sept., 1888
Complete Specification Accepted, 19th Oct., 1888
An Improved Weft Stop Motion for Looms.
I, CHARLES BEDFORD, of Wood View Terrace Carlinghow, Batley, Yorkshire
Machine Shop Manager do hereby declare the nature of this invention to be as
follows:-
This invention has reference to a new arrangement and construction of weft stop
motion employed in looms for weaving, and the object thereof is to more suddenly
stop the loom on the absence of weft, either from breakage or other causes.
In carrying out my invention I place underneath the slay board alongside the
ordinary stop rod another stop rod parallel thereto. On one end of this additional
stop rod is a short arm carrying a pin or stud which enters into the slotted end of a
connecting rod hinged to some convenient part underneath the loom. The additional
stop rod carries at each end thereof projections or "bangers," which bangers on the
absence of weft are caused to operate the usual knocking off mechanism for stopping
the loom in the same manner as the bangers on the ordinary stop rod, stops the
loom when the shuttle fails to enter the box. As the slay or going part of the
loom oscillates, the slotted connecting rod is caused to draw down the arm on
the additional stop rod in such manner as to raise the front end of the banger.
On the free end of the lever arin there is also a vertical rod connected to one
end of a bell crank lever, the other end of such bell crank lever being connected
by rod to a plate, which plate, on the oscillation of the additional stop rod, is
caused to slide forward. This sliding plate is provided with two horns or pro-
jections the larger one of which comes into contact with a tailpiece on the boss
of the weft feelers, which feelers are thus raised, allowing a shoot of weft to be
sent across the loom. The sliding plate carrying the projections is immediately
afterwards slided back by a suitable arrangement of springs, in doing which the
plate allows the weft feelers to descend, and if weft he absent the tailpiece attached
to the feelers catches in the smaller projection on the reciprocating plate, thereby

page_text: holding the plate in that position, in which case the point of the bangers would
not descend, but would be held up in such a position that on the forward move-
ment of the slay, the banger would strike the ordinary knocking off mechanism
and instantaneously stop the loom and this would happen before the reed had
reached the cloth and also before the shed had been closed or the threads of warp
crossed upon the broken shoot thus avoiding the necessity of the weaver turning
the loom and seeking the lost or broken shoot, which with the present construction
of weft forks has always to be done.
Instead of oscillating the additional stop-rod by means of the slotted connecting
rod and lever arm, other devices may be employed for giving oscillatory motion
to the additional stop-rod or bangers.
Datod this 12th day of Dhaamhan 1987
TASKER & CROSSLEY,
Halifax, Agents.

page_text: An improved weit Stop Motion for Looms.
I, CHARLES BEDFORD, of Wood View Terrace, Carlinghow, Batley, Yorkshire,
Machine Shop Manager, do hereby declare the nature of this invention and in what
manner the same is to he performed, to be particularly described and ascertained in
and by the following statement :--
This invention has reference to a new arrangement and construction of weft stop
motion, employed in looms for weaving, and the object thereof is to more suddenly
stop the loom on the absence of weft, either from breakage or other causes.
manner.
In order that my invention may be better understood I will now make reference to
the accompanying sheets of drawings illustrative thereof, wherein Fig. 1 is one end
view of my improved mechanism, and Fig. 2 front elevation thereof. A is the breast
beam of a loom, B the slay board or "going part" caused to oscillate to and from the
breast beam by the lathe sword Chinged upon the fulcrum D in the ordinary
For the proper working of my invention I employ a horizontal stop or
banger rod E carrying at each end a projection or banger F. I also place on
the said stop or banger rod a bell crank lever G carrying a pin a for working
within the slot formed in the end of the connecting rod H hinged at I so that
when the slay is moving backwards, the pin a will get to the end of the slot in
the connecting rod, and as the pin can get no further the connecting rod will
move the bell crank lever G in such manner as to rock the banger rod E and
raise the banger as shewn in dotted lines in Fig. 1. On the free end of the
lever arm G, I attach an upright arm or rod J connected to a bell crank lever K,
one end of such bell crank lever being attached to the rod L, which in turn is
fastened to the sliding cam plate M. I would here observe that as the bell
crank lever K is placed at the back of the slay board and the sliding plate in front
thereof, it is necessary for the rod I. to be bent or cranked so as to be connected to
parts of the mechanism which are on both sides of the slay board. The ordinary
weft feelers are shewn at N and they are capable of oscillating upon a short pin or
stud in the ordinary manner. At the root of the weft feelers N I fix a tail piece or
projection c, and on the edge of the sliding plate M I form two cams or horns d and e
as shewn in plan view Fig. 3, the larger horn d being employed to raise or lift up
the feelers as shewn in Fig. 2, whilst the small borne is employed for catching hold
of the tail piece during the absence of weft for the purpose of knocking off or
stopping the loom.
The modus operandi is as follows:-Each time the lay oscillates backwards, the
connecting rod H draws down the bell crank lever G, and the cam plate M is slided
in the direction of the arrow P, and as the tailpiece c of the feelers is resting against
the horn such tail piece is moved in such a manner as to lift up the feelers, the
rod E is also oscillated, and the banger is raised as shown in dotted lines Fig. 1.
At this moment the shuttle is sent across the shed, when the lay is advancing towards
the breast beam A, and the spiral spring O, which has been opened by the action of

page_text: the rod J and bell crank lever K, is now pulling at the cam plate M, causing it to
slide backwards, whereupon the tailpiece c follows the horn d allowing the feelers to
descend, and if a thread of weft f (see Fig. 1) is lying across the lay, the said feelers
would rest upon the said weft and the loom would proceed; but if there were not a
thread of weft on the lay, whether through breakage or other cause, the feelers would
fall into a slot cut in the lay, causing the tailpiece to be thrown far enough back to
be caught hold of by the horn e in the sliding plate, consequently its endwise motion
would be stopped, preventing the bell crank lever K from allowing the rod E to rock
or oscillate, whereby the point of the banger would be held up and come opposite the
knocking off mechanism P so that as the lay advanced towards the breast beam, the
banger would strike the knocking off apparatus and the loom would be stopped, all of
which would happen before the shed had been closed or the threads of warp crossed
upon the broken or lost shoot, thus avoiding the necessity of the weaver turning the
loom and seeking the lost or broken shoot, which with the present construction of
weft forks has to be done; thus the banger acts in the same manner as the ordinary
stop rod performs its function when the shuttle fails to enter the box.
Having now particularly described and ascertained the nature of my said invention:
and in what manner the same is to be performed, I would have it understood that
what I believe to be new and claim as my invention is:-
Firstly. In weft stop motions of looms, the use of a sliding plate made with two
horns or cam surfaces such as d and e, in combination with a weft feeler having a
tailpiece c thereon employed and operated in the manner set forth.
Secondly. In combination with a weft stop motion, the use of an additional stop or
banger rod carrying a banger at each end for knocking off the loom and arresting
any further forward movement of the going part, substantially as described.
Dated this 12th day of September 1888.