Improvements in Pattern Arresting Mechanism of Looms for Weaving.
Year: 1898

page_text: Date of Application, 27th Dec., 1898-Accepted, 11th Feb, 1889
[Communicated from abroad by GLORGE FRANK HUTCHINS, of 311, Main Street,
Worcester, Massachusetts, in the United States of America, Power Loom
Maker.]
Improvements in Pattern Arresting Mechanism of Looms for
Weaving.
I, EDWARD HOLLINGWORTH, of Hutchinson, Hollingworth, and Co, Limited, of
Dobcross, in the County of York, Power Loom Makers, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
laily described and ascertained in and by the following statement:--
My invention relates to looms for weaving textile fabrics, and more particularly
to that class of looms provided with what is termed a dobby mechanism the pattern
Bu face of wluch contiols the movement of the harnesses, and also with a drop box
pattern mechanism, the pattern surface of which controls the movement of the
boxes There are two or more shutting shuttle boxes at one end of the lay, and
a single stationary shuttle box at the other end of the lay
Heretofore in this class of loomis, the pattern surfaces of the dobby and diop
box pattern mechanisms have been so constructed and arranged, that in case of a
mis-pick, or in case the weaver has to pick out for any reason, it has been necessary
to turn back and set the pattein chain of the dobby mechanism, and the pattern
chain of the drop box mechanism separately, and in doing this great care has to
be taken that the, two pattern chains coincide exactly with each other, so that
the loom will weave the fabric properly
One of the objects of my present invention is to so construct the dobby mechan-
18m pattern surface, and the box mechanism pattern surface, and combine them
together, that the operator by turning a angle hand wheel, may tuin both pattern.
sui faces forward or backward simultaneously, and thus prevent any possibility of
then getting out of time, or harmony
And heretofore in this class of looms above referred to, when the filling bioke,
o an out, and the loom was stopped automatically by the filling stop motion,
the momentum of the loom caused the hainesses to be shifted, and the shuttle,
being thrown across the lay, to be returned to its box, without putting in any
filmg, that is the loom made two picks without putting in any filling, and after
the operator has withdrawn the shuttle and put in new filling, in case of its having
run out, or diawn out a new end, in case of its breaking, he must, before he starts
the loom, tuin back the pattern surface of the dobby mechanism, and also the
pattern surface of the drop box mechanism two picks. After he has done this, he
starts the loom and the shuttle commences to put in the filling in the fabric, at
the point where the filling was bioken, o1 1an out
Another object of my piesent invention 18, in case of the breaking or running
out of the filling, to do away with the necessity of the operator tuning back the
pattern mechanisms as above described two picks, to make the night shed for the
shuttle, when he starts the loom, and to so construct the dobby mechanism, and
017

page_text: the drop box pattern mechanism that when the filling stop motion operates to stop
the loom, the diving mechanism of the dobby pattein surface and the drop box
pattern surface will be thrown out of action, so that said dobby pattern surface
and drop box pattern surface will be automatically stopped, and will not again
operate, to indicate a change in the hainesses or the boxes, until the shuttle in
which the filling has been renewed, has been thrown across and back, that 18 the
loom has made two picks, and the shuttle is ready to weave the fabric at the point
where the filling broke, or an out, then the dobby pattern surface and the diop
box pattern surface will automatically start to indicate, and the loom continue to
operate in the same manner as before the filling bioke on an out
By my construction above referred to. it is not necessary to turn back the pattein
surfaces in case of the filling breaking on tunning out, thus saving much time
and annoyance for the operator.
My improvements first mentioned are adapted to be combined with and used on
looms which have a single or double dobby mechanism and a drop box pattern
mechanism.
My improvements last mentioned are adapted to be combined with and used
on looms which have a double index dobby mechanism alone, or both a double
index dobby mechanism and a drop box pattern mechanism It will be under-
stood that in a double index dobby pattern mechanism there are two rows of pins
or pattern surfaces on each pattern bai. one row acts on one set of indicator
leveis of the dobby and the other row acts on the other set, that is, the two 10WB
of pins on one bar will actuate the indicator levels to move the harnesses for two
picks of the shuttle, so that the dobby pattern cylinder is only moved every two
picks of the loom, the same as the box pattern cylinder
Refening to the drawings
-
Fig 1 shows a plan view of a diop box pattern mechanism, and a double index
dobby pattern mechanism, (of wluch only a portion of the pattein cylinder and its
driving mechanism is shown), with my improvements applied to said pattern
mechanisms
Fig 1 is a section on line 1, 1ª, Fig 1, looking in the duection of arrow c
same figure
Fig 21s, on a reduced scale, an end view of the parts shown in Fig 1, looking
in the direction of arrow a, same figure, shows also the loom side, and connections
to the arm on the knock-off shaft
Fig 3 18 an edge view of the fiame shown in Fig 2, looking in the duection
of anow b, Fig 2, showing by full lines the connections shown by dotted lines in
Fig 2
The pattern mechanisms are not shown.
Fig is a sectional detail, through the gear and slide clutch, shown at the top
of Fig 1.
Fig. 5 shows the worm 31 and its shaft 14 detached, and,
Fig 6 shows the periphery or surface of the cam shown in Fig 5, extended in
a horizontal plane
In the accompanying drawings, 1 is the loom side or frame, at the left of the loom,
2 is the dobby frame, supported on the upper end of the frame 1, and having the
two upright side frames 3, in which is mounted the shaft 4 of the dobby pattern
cylinder 5, for the harness frames, not shown. The pattern cylinder 5 may be of
ordinary construction, and is provided with a series of longitudinal grooves or
recesses 6, in which extend the bars of the pattein chain, in the ordinary way
Only one pattern chain bar 7 is shown, and this is provided with two rows of pattern
pins 8 and 9, aanged alternately for what is termed a double index dobby The
pins
and 9 act on the indicator levels (not shown) of the dobby in the usual and
well known way The end of the pattern cylinder shaft 4 extends bevond the
inner side fame 3, and has a worm gear 10 loose thereon, which is held to turn
with the shaft 4 by a spring actuated clutch device 11, of ordinary and well known
construction, and consisting of a spring actuated arm or dog 111, pivotted at one
end on a plate 11", the hub 111 of which is fast on the shaft 4

page_text: A coil spring 12, bearing at one end against a collar 12¹ fast on the end of the
shaft 4, and at its other end against the arm or dog 11 acts to keep the said
dog 11 in engagement with the lugs 10¹ on the worm gear 10, so that the revolu-
tion of the gear 10 will revolve the shaft 4 of the pattern cylinder 5. The shaft 4
can be turned by hand, if desired, the dog 11' slipping by the lugs 10' on the worm
gea 10, and the spring 12 contracting, so that the shaft 4 and pattern cylinder 5
may be turned in either direction, independently of said worm gear 10, all in the
usual and well known way.
Secured to the dobby mechanism frame 2 18 the frame 13, which in this instance
supports the drop box pattern mechanism, and also the shaft 14, which drives the
dobby pattern chain cylinder 5 and the pattern surfaces of the drop box pattern
mechanism. The shaft 14 has a gear 15 loose thereon, driven by a system of gears,
or some driven part of the loom, not shown Said geal 15 18 attached to said shaft,
to revolve the same, by means of a sliding grooved hub 16 loose on the shaft 14,
and carrying a pin 17, which extends through a guide hole in a collar 18 fast on
the shaft 14, see Fig. 4, and is adapted to enter a hole 15' in the gear 15, to cause the
shaft 14, to be revolved with the gear 15, and to be withdrawn from said hole,
to allow the gear 15 to run loose on the shaft 14, see Fig. 4
A lever 19, pivoted at 20, is provided with a yoke 191 having pins or 10lls which
extend into the peripheral groove in the hub 16. The lever 19 is used to move said
hub in one direction or the other, to secure the gear 15 to the shaft 14, or to cause
it to run loose thereon as above described A spring 21 encircles the pivot stud 20
of the lever 19, and acts to move the lever 19 in one direction, to keep the hub 16
against the collar 18, as shown in Fig. 1, and the pin 17 in the hole 15' in the
gear 15.
The lever 19 18 operated automatically to move the hub 16 and withdraw the
pin 17 from the hole 15' in the gear 15, and allow said gear 15 to run loose on the
shaft 14, and said shaft to stop, by a cord or flexible connection 22 which is
secured at one end to the lever 19 in, front of its pivot point 20, and runs over a
pulley 23 supported on an aim 24, over a second pulley 25, and a third pulley 26
Supported on the loom side, to an arm 27 fast on the knock-off shaft 28 mounted
to rock in bearings 29 on the front of the breast beam 30, see Figs. 2 and 3.
On the opposite end of the shaft 14 from the gear 15, is fast a worm 31, which
extends below and engages and turns the worm gear 10 The worm 31 has a dwell
of one-half a revolution, as there are two sets of pins 8 and 9 on the pattein bars,
and therefore a partial revolution of the worm gear 10, and pattern cylindeı 5 is
made only every two picks, in the ordinary and wellknown way.
On the extreme end of the shaft 14 is fast a gear 32, which meshes into and
dives a gear 33 fast on the shaft 34 of the drop box pattern mechanism,
By means of the gears 32 and 33, the dobby pattern cylinder and the diop box
pattern cylinders are connected, so that the turning of one in either direction
will turn the other simultaneously.
In the drop box pattern mechanism, 35 18 the box pattern chain cylinder, 36 the
pattern indicator levers for a series of six diop boxes, not shewn 37 18 the
indicator lever connected through connector 45, angle lever 46, pivoted at 47,
sliding 1od 48, provided with a collar 481 engaged by said lever 46, and yoke
arm 491 fast on 1od 48, with the pin wheel 42 splined on a sleeve 49 fast on the
shaft 34, to slide said pin wheel 42 into engagement with the star wheel 43, which
operates the auxiliary or multiplier pattern chain cylinder 40, when a roll on
the pattern chain comes under the indicator lever 37, see Fig 1
A
spring 50 secured to an extension 46' on the angle level 46, and to a stationary
part 51, acts to move said level 46, sliding rod 48, and yoke arm 49', to cause the
pin wheel 42 to move out of engagement with the star wheel 43, when a tube,
not shown, on the pattern chain comes under the indicator lever 37
The auxiliary or mutiplier pattern chain cylinder 40 used in this instance, and
the indicator lever 41 therefore, are connected through connector 52, angle lever 53
pivotted at 54, sliding 1od 55, provided with a collar 55 engaged by angle

page_text: lever 53, and yoke arm 56 fast on 1od 55, with the pin wheel 38 splined on the
sleeve 49, to move said pin wheel 38 into engagement with the star wheel 39,
which operates the box pattern chain cylinder 35, according to the indications of
the multiple pattern chain in the ordinary way, when a roll comes under the
indicator lever 41, see Fig 1*
A spring 57 secured to an extension 531 on the angle lever 53, and to a collar 58,
acts to move said lever 53, sliding rod 55, and yoke aim 56, to cause the pin
wheel 38 to move out of engagement with the star wheel 39 in the ordinary way,
when a tube, not shown, on the multiplier pattein chain comes under the indicator
level 41
The box pattern cham cylinder 35 and the auxiliary or multiplier pattern chain
cylinder 40 are operated by the pin wheel and star wheel mechanism shown in
the drawing, and above described
On the front end of the shaft 34 is fast a hand wheel 4, by means of wluch both
the box pattern chain mechanism, and the dobby pattern chain mechanism, through
gears 33 and 32, are simultaneously turned backward or forward, the hand level 19
being first moved to the position indicated by dotted lines Fig 1, to disengage the
pin 17 on the hub 16 from the hole 151 in the gear 15, and allow the gear to be loose
on the shaft 14
It will be seen, by refening to Fig 4, that in case of the withdrawal of the pin 17
from the hole 15' in the gear 15, their must be a complete revolution of the gear 15,
'before the pin 17 will again enter the hole 15¹ therein
Now when the loom is stopped by the filling stop motion, in the usual way, in
case the filling uns out, on breaks, the rotation of the knock-off shaft 28, through
arm 27 and connector 22, will automatically move the lever 19 and the hub 16,
and withdraw the pin 17 from the hole 15 in the gear 15, and disengage the gear
fiom, and allow it to run loose on the shaft 14
The momentum of the loom will carry the opening 15' in the gear 15 by the end
of the clutch pin 17, so that said pin cannot re-enter the hole 15¹ The shaft 14,
being unclutched or disconnected from the grai 15, will stop, and consequently
the pattern cylinder of the dobby mechanism, and the pattern cylinders of the drop
box mechanism will stop
The shuttle in which the filling has broken or run out, will be thrown once
across the lay, and the momentum of the loom will cause it to be thrown back
again to the side of the loom from which it started, and the momentum of the
loom will cause the harnesses to make two sheds, that is, the loom will make
two picks, but no filling will be put in after the pattern cylinder of the dobby
mechanism and the pattern cylinder of the drop box mechanism have stopped,
as above described.
The take-up mechanism will be arrested, that is the mechanism which operates
the take-up roll will be stopped when the loom stops, in the ordinary way.
After the broken end of the filling is drawn out and caught, on the new filling
put into the shuttle, and the shuttle placed in the loom started in the ordinary
way, one pick of the shuttle must be made to put in a filling before the mechanisnis
begin to indicate, for the reason in the last two picks, no filling was put in, and
the pattern mechanisms begin to indicate on the second pick of the shuttle Non
if the pattern mechanisms change the pick and shed when the loom is started,
the night pick and shed will not he made, and therefore as before stated, in ordinary
practice the pattern mechanisms must be turned back before the loom is started
In my improvements, by unclutching the gear 15 from the shaft 14 as above
described, said gear must make a complete revolution, after the loom is stated,
which is equivalent to two picks of the shuttle, before it will be again clutched to
the shaft 14 by the operation of the sping 21, and operate the pattein mechanisms,
that is when the loom is started, the shuttle will be thrown across the lay to put in
the filling where no filling was put in before
By reason of the two rows of pattern pins 8 and 9 on the pattern ban 7 of the
double index dobby, the second row of pins will indicate and change the shed after

page_text: the first pick of the shuttle, so that the second pick of the shuttle will be put
into the other shed, to put in the filling where no filling was put in before without
any movement of the pattern chain cylinder, that is two picks of the shuttle will
be made to put in two fillings before the pattern cylinders begin to rotate to
bring into action new pattern bars
It will be understood that the details of construction and the manner of com-
bining my improvements with the drop box pattern mechanism, and the dobby
pattern mechanism, may be varied if desired from what is shown and described
I have shewn the drop box pattern mechanism with an auxiliary or multiplier
pattern chain, but this may be left off, and the ordinary drop box pattern chain
used.
I have also shewn a drop box pattern mechanism combined with the dobby
mechanism, but in some weaving the drop box pattern mechanism, may be dis-
pensed with, and only the dobby pattern mechanism used, and the second feature
of my invention, the automatic starting of the dobby pattern cylinder after two
picks have been made, can equally well be used in this case
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
(1) In a loom provided with a double index dobby pattern mechanism, the
combination with the dobby pattein cylinder, a shaft, and intermediate connections
therefrom, which drives the said cylinder and driving mechanism for said shaft,
of means for automatically disconnecting said diving mechanism on the operation
of the filling stop motion on the loom, and means for automatically connecting said
driving mechanism to cause said shaft and cylinder to start after two picks of the
shuttle are made and said filling stop motion substantially as set forth
(2) In
a loom provided with a drop box pattern mechanism, and a
double index dobby pattern mechanism, the combination with the box
pattern cylinder and the dobby pattern cylinder, a shaft, and inter-
mediate connections therefrom which drives said cylinders, and driving mechanism
for said shaft, of means for automatically disconnecting said driving mechanism
on the operation of the filling stop motion on the loom to cause said cylinders to
stop, and means for automatically connecting said driving mechanism to cause
said cylinders to start after two picks of the shuttle are made, and said filling
stop motion, substantially as set forth.
3 In a loom provided with a drop box pattern mechanism, and a double index
dobby pattern mechanism, the combination with the shaft which communicates
motion through intermediate mechanism to the box pattern cylinder and to the
dobby pattern cylinder, a gear loose on said shaft but clutched thereto, and the
filling stop motion shaft, of means for automatically unclutching said gear through
connections to the filling stop motion shaft on the operation of the filling stop
motion, to cause the pattern cylinders to stop, and means for automatically clutelung
Faid gear on the shaft to cause the pattern cylinders to start after two picks of the
shuttle, and said filling stop motion, substantially as set forth
Dated this 22nd day of December 1898.
TASKER & CROSSLEY,
Patent Agents, Halifax, Agents for Applicant