IMPROVEMENTS IN STOP MOTIONS FOR LOOMS
Year: 1883

page_text: LETTERS PATENT to Arthur William Lovell Reddie of the Office for Patents
66 Chancery Lane in the County of Middlesex. Patent Agent. for an
Invention of IMPROVEMENTS IN STOP MOTIONS FOR LOOMS communicated to
him from Messieurs Pruvot Bouy et Compagnie of Paris in the Republic of
France
PROVISIONAL SPECIFICATION left by the said Arthur William Lovell
Reddie at the Office of the Commissioners of Patents on the 30th July 1883.
ARTHUR WILLIAM LOVELL REDDIE of the Offico for Patents 66 Chancery Lane
in the County of Middlesex, Patent Agent IMPROVEMENTS IN STOP MOTIONS FOR
LOOMS." [communicated to him from Messieurs Pruvot Bouy et Compagnic of
Paris in the Republic of France]
This invention relates to a novel arrangement of stop motion for Looms whereby
the action of the loom is stopped automatically on the shuttle failing to enter the
shuttle box.
The chief object of the invention is to apply the brake by an elastic pressure
and to release the brake so as to render the batten free to be moved back into a
position that will facilitate the ro-adjustment of the shuttle. The shuttlo as
heretofore when entering the box forces back a horizontal lever which bears against
a vertical rock lever mounted on the batten and carrying at its lower end a pawl
which as the loom is working will ride over a sliding block in connection with the
belt shifter. When, however, the shuttle fails to press back this lever the pawl
will drop and coming into contact with a projection on the sliding block will drive
that block forward and cause it to disengage the spring lever which puts the belt
shifter in action. For the purpose of putting on the brake to check the momentum
of the loom, the brake is connected by a rod with the sliding block and by means
of a spring affixed to the framing and bearing against a collar of the rod a
tendency is given to the rod to hold off the brake from the brake wheel.
The sliding block is slotted to receive two bolts which are affixed to the framing
and serve as guiding and retaining studs for the block. At front the block is
connected with the spring lever of the belt shifter by the interposition of a spring

page_text: or its equivalent, which as the block advances will thrust the elastic hand lever
out of its retaining notch and enable it to throw the driving belt out of action.
Adjustable stops for limiting the motion of the sliding block are provided and
the pressure of the springs is regulated by thumb screws or their equivalent.
Supposing now the shuttle to have failed in its traverse through the shed, and
the sliding block to be in consequence driven forward, the belt shifter will be set
in action and simultaneously the brake will be brought into contact with its
friction wheel against the counteracting pressure of the spring applied to the brake
rod. Thus the sudden application of the brake heretofore found detrimental to
the stability of the loom will be moderated and when the sliding block is released
from the pressure of the driving pawl the brako will be moved out of contact with
the friction wheel thereby freeing the driving parts of the loom and allowing the
attendant-to-move them at his pleasuro.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Arthur William Lovell Reddie in the Patent Office on the
30th January 1884.
ARTHUR WILLIAM LOVELL REDDIE of the Office for Patents 66 Chancery Lane
in the County of Middlesex Patent Agent "IMPROVEMENTS IN STOP MOTIONS FOR
LOOMS," a Communication to me from Abroad by Messieurs Pruvot Bouy
et Compagnie of Paris in the Republic of France
This Invention relates to a novel arrangement of stop motion for looms whereby
in the event of tho shuttlo failing to enter the shuttle box the motion of the
batten will be gradually arrested without shock, the brake will be applied to the fly
wheel, and the driving belt will be shifted onto a loose pulley also without
causing any jarring of the loom. Moreover the readjustment of the shuttle by
the attendant and the taking off of the brake will be greatly facilitated by this
arrangement of stop mechanism, and the liability of the loom to be damaged will
be greatly obviated.
The Invention will be understood on reference to the accompanying drawings,
in which Fig: 1 is a plan view of a loom with the improvements applied thereto;
Fig: 2 is an end elevation thereof partly in section; Figures 3 and 4 illustrato
the sliding block at either side of the loom in plan and section, and Figures 5 show
the brake mechanism.
The stop mechanism consists essentially of the following parts :-
1. A pair of sliding blocks or pieces A A, one at each side of the loom.
2. A pair of springs R each of which is connected by a rod T or its equivalent
with one of the said blocks Å A
3. A brake block D of wood or metal faced or not with an elastic or semi-elastic
substance, and fixed on the rod T, or preferably (and as shown) arranged to
pivot around a fixed point and actuated by the rod T through a slotted link or
its equivalent.
4. A spring or elastic buffer S fixed to the handle of the lever by which the belt
is shifted from the driving to the loose pulley.
The blocks A A are situate one on either side of the loom and are arranged to
slide on guide pins, or in guides; in lines at right angles to the cloth beam.
These blocks are shown in detail in Figures 3 and 4.-They have double slots
with recesses formed around the said slots for the purpose of receiving the pins
by which they are guided, and so that the heads or nuts on such guide pins may
bo counter sunk or below the upper surface of the said blocks. The blocks aro
connected each with a spring R (seen best in Fig: 2) by means of a rod T or its
equivalent; the tension or compression of the spring being regulated by a nut r
on the end of the rod T.
The shuttle is operated in the usual way and should no accident happen will at
each back position of the batten enter the shuttle box at one side or the other
thereby forcing back the usual horizontal lever F (Fig: 2) and, by it, holding the
vertical lever E in its backward position-The levers E E are fast on the
horizontal rock shaft C (shown in dotted lines in Fig: 1) and on this rock shaft C
are the pawls E¹ E¹ which may practically be regarded as continuations of the
levers E E.
When therefore the levers E E are held back by the lever F owing to the
presence of the shuttle in either of the shuttle boxes the pawls E¹ E will be
raised, and when the batten advances, will clear the sliding blocks A A, and the
weaving will continue without interruption.
If however, from any cause the shuttle fail to enter its box on either side the

page_text: loom, the lever F in that box will not be forced back, and both levers E E will be
free to move forwards, which they will do by reason of the weight of the
pawls E¹ E-These pawls will therefore drop into a position to engage with the
sliding blocks and the batten in its forward movement will be gently received by
these yielding blocks and its motion arrested in a gradual but certain manner, and
with a degree of elasticity due to the springs R. R.
At the same moment, that is when the batten by means of the pawls E¹ E¹ has
thrust the sliding blocks A A as far forward as the springs R R will permit, an
arm K upon one of the said blocks (see Figures 2 and 3) will bear against a spring S
fixed to the lever I by which the belt shifter is operated, and by pressing back that
lever will shift the belt from the driven to the loose pulley.
At about the same moment also, a stop on the rod T will engage with the link
connection from. the brake block and will cause the brake block to bear against and
stop.the fly wheel J.
By these means the loom will be thrown out of gear with the driving mechanism,
the brake will be applied to the fly wheel, and the forward movement of the batten.
be arrested practically simultaneously and without jarring.
F
Moreover the springs S and R Ř will greatly. facilitate the adjustment of the
shuttle by enabling the operator to thrust back the batten, and by tending to
remove the pressure of the brake on the fly wheel.
b.
By the above described arrangement the stoppage of the batten is effected
quietly and without shock to the loom, and the jamming of the shuttle against and
between the warp threads, and the breakage of the swords, which is by no means
an uncommon occurrence in ordinary looms, are thereby avoided. .
The sliding blocks A A may be of various forms, but that shown in the Drawing
is preferred. They are so mounted as to slide freely in a forward or backward
direction, and aro:held or guided in their straight courses by the guide bolts which
pass through the double elongated slots G, and whose heads are countersunk and
work in the recesses around the said slots.-By using a pair of slots and guide pins
to cach sliding block, all chance of their wedging is obviated.-The sanie result
could be obtained by using a single bolt working horizontally in a groove or hole
formed in the centre of the frame
These sliding blocks, not having any vertical play, and the guiding mechanism
being adapted to the frame, may be situate at any point thereon and may be
applied to all kinds of looms providing sufficient travel is allowed to obtain the end
in view, the length of such travel being moreover determinable by means of the
slides G G. Owing to the entire freedom of movement of these sliding blocks and
to their connections with the springs R R, and with the brake mechanism D
(details of which are shewn in Figures 5) as soon as the blocks are caught by the
pawls EE and thrust forwards the brake block is applied and the loom stopped,
but at this moment the reaction of the springs R R aided by the thrust of the
spring S as above explained takes off the brake and draws back the blocks A A
thus allowing the batten to be moved back easily.
The spring S between the arm K of the block A and the lever I by which the
driving belt is shifted, prevents all shock at this point.
The spring S could also be arranged to strike or press against a lever without
shock or jar and detach it from a catch or detent thereby allowing it to be thrust
outwards as in ordinary looms, and the belt to be shifted.
The springs R and S might also be replaced by springs of other suitable forms,
or by a pair of arms hinged together like tongs, and having a spring tending to
separate such arms, or a plug or buffer of clastic material, such as india rubber,
might be used as their equivalent.
The method of connecting the sliding blocks with the springs could also be
varied as for example by placing the springs R. R between tho blocks A, & the
brake, or the springs might be applied directly to the blocks themselves: in this
case, especially if the loom be a light one, the brake might be dispensed with and
the rod T would, be unnecessary.
J..

page_text: The Inventors are aware that in some looms at present in use blocks for stopping
the loom are employed one of these blocke near the driving pulley being moveable,
and the other being fixed.
In these looms if the shuttle fails to arrive in its box, pawls engage in succession
with these blocks, the one thrusting back a rod which throws the loom out of gear
with the driving mechanisin, and the other pawl when this is done encountering
the second stop and abruptly stopping the loom.-A violent shock to the loom
results and frequently the swords are damaged or fractured.
From the foregoing description it will be seen that the present Invention offers
manifest advantages over the old stop motion above referred to.
Having now described the Invention of "Improvements in stop motions for
Looms as communicated to me by my Foreign Correspondents, and explained in
what manner the same may be carried into practical effect I clain :-
First: The hereinabove stop motion for looms by which, in the event of the
shuttle failing to completo its throw, the forward movement of the batten is
arrosted gradually and without shock, the brake is applied to the fly wheel and
the driving belt is shifted, also without shock, onto a loose pulley, substantially as
setforth.
Secondly In a loom the arrangement of sliding blocks AA, rods T T springs R R
and brake connections as described, whereby not only is the forward movement of
the batten arrested without shock to the loom, and the brake applied to the fly
wheol at the desired moment, but the efforts of the attendant to thrust back the
batton are facilitated and the brako is more easily taken off.
Thirdly The combination with a sliding block or blocks, such as A, adapted to
receive through the pawls E' E¹ the thrust of the batten and arrest its motion
without shock in the event of the shuttle failing to complete its course, of a spring
buffer such as S interposed between the said block A and the lever I, by which
arrangement the driving belt can be shifted without jarring the loom substantially
as sotforth.
In witness whereof I the said Arthur William Lovell Reddie have hercunto set
my hand and seal the thirtieth day of January in the year of our Lord One
thousand eight hundred and eighty four.
("CUT)
ARTHUR W, L
TATAWA T
DIE