Improvements in Dobbies and Leno or Cross-weaving Mechanism of Looms for Weaving.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Dobbies and Leno or Cross-weaving 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 (which has been communicated to me by Horace
Wyman and William Redding, both of Worcester, State of Massachusetts, in the
United States of America, Power Loom Makers), to be as follows:-
The first part of my invention in looms for weaving has reference particu-
larly to looms provided with a "dobby." or other arrangement of pattern mechan-
isms each employing a plurality of pattern surfaces in the form of chains or
otherwise, adapted to be operated successively, for example one during the
weaving of a border or end and the other during the weaving of a plain por-
tion or body of a fabric.
1
The object of this part of my invention is to simplify and to otherwise im-
prove pattern mechanisms of the class referred to, whereby the change from one
pattern to another, and the operation of the loom may be facilitated. One
feature of my invention is the mounting of the pattern surfaces in fixed
position or in fixed bearings to thereby save the time usually required in shifting
the pattern surfaces, (heretofore mounted in movable bearings) from inoperative
into operative position.
To carry out my invention, two pegging barrels are employed side by side
carrying pattern surfaces. At a suitable position above these pattern surfaces,
are a series of bell crank levers, the horizontal arms of which rest upon one
pattern surface, whilst the vertical arms of said levers are in contact with the
other pattern surface, for the purpose of shifting the hooks in the dobby of
the loom for operating the healds to form the shed. These double or compound
pegging barrels are so arranged that when the dobby stops, the selecting sur-
faces on the bell crank levers dwell or rest upon spaces between the lags of the
pattern chain or surfaces, so that any projection lifting its selecting surface is
made or permitted to pass that selecting surface before the chain, carrying that
projection is stopped and by which means the said chain is always left in readi-
ness to immediately engage and move its selecting surface when again set in
motion.
The pegging barrels carrying the pattern surfaces are made to revolve inter-
mittently by clutches operated in and out of corresponding clutches in worm
wheels, this being performed by means of a rocking lever receiving its motion
from another pattern surface at the head of the loom."
In my arrangement the two pegging barrels rotate upon axes in fixed positions.
The next part of my invention has reference to looms employed in cross
weaving or leno work.
In looms of this class, the warp threads are usually divided, those which are
to be carried in the usual manner through the loom being drawn from a separate

page_text: beam from those which are to be crossed. These latter threads which have to
be crossed, when drawn from the beam, have hitherto been passed over a guide
or whip roll, made movable and connected with some movable part of the loom
to cause it to be vibrated in required manner to give out and take up the warp
threads, as may be necessary to enable said threads to be crossed, yet to be
always maintained under suitable tension.
One object of this part of my invention is to provide improved means for
vibrating the guide referred to or an equivalent guide, and for holding the same
in position under the tension of the warp threads drawn thereover.
To put my invention into practice I employ a guide or whip roller made to
vibrate by an arrangement of toggle jointed levers which by means of linked
connections and projecting pins or studs are actuated so as to rock the guide
roller over which the warp passes. The rocking motion is given to the vibrator
roller or whip through the intervention of the toggle jointed levers which are
connected to the harness frames, such said harness frames being raised and
lowered in any well known manner by the dobby whereby the warp is crossed for
performing leno work.
XI
TASKER & CROSSLEY,
Patent Agents,
Halifax,
Improvements in Dobbies and Leno or Cross-weaving 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 (which has been communicated to me by Horace
Wyman and William Redding, both of Worcester, State of Massachusetts, in the
United States of America, Power Loom Makers,) and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement:-
-
"
The first part of my invention in looms for weaving has reference particu-
larly to looms provided with a dobby," or other arrangement of pattern mechan-
isms each employing a plurality of pattern surfaces in the form of chains or
otherwise, adapted to be operated successively, for example one during the
weaving of a border or end, and the other during the weaving of a plain por-
tion or body of a fabric.
The object of this part of my invention is to simplify and to otherwise im-
prove pattern mechanisms of the class referred to, whereby the change from one
pattern to another, and the operation of the loom may be facilitated. One
feature of my invention is the mounting of the pattern surfaces in fixed
position or in fixed bearings to thereby save the time usually required in shifting
the pattern surfaces (heretofore mounted in movable bearings) from inoperative
into operative position.
In the drawings, Fig. 1, in side elevation, partially broken away, illustrates
one embodiment of my invention;
.
Fig. 2, a partial end elevation of the mechanism Fig. 1, looking from the
right;
0
ism of the nont shown in Tim

page_text: ↓
Fig. 4, a diagrammatical section, illustrating the preferred embodiment' of
the pattern surface, relatively to the parts moved thereby;
be
Fig. 5, a detail in plan view showing the clutch operating arms, and
Fig. 6, a view showing the several parts of Fig. 5 separated.
This invention is not necessarily limited to any particular pattern mechanism,
but I have herein elected to apply my invention in connection with the Holling-
worth and Knowles' dobby.
Referring to the drawings, the loom frame A, the notched jack levers X 4
the auxiliary pattern lever arm 7 pivotted at 8, on a stand 99, the stud
mounted on said stand and carrying loosely the auxiliary pattern cylinder h¹
carrying a ratchet 2 and hand wheel 3, said cylinder carrying the auxiliary
pattern surface, shown as a chain h4 provided with suitable protuberances and
spaces to raise and lower said lever arm g7, the pawl m pivotted on a lever n
fulcrummed on a stud mounted on the stud 9, the stop 14, the spring 15,
and the brake supporting arm but partially shown at 2, are of ordinary con-
struction.
In accordance with my invention, the pattern surfaces, shown
as two. in
number and indicated at o, o', and herein shown as in the form of chains, are
mounted upon suitable cylinders 2 and 3, partially shown in Fig. 2, fixed
on suitable shafts o 4,-05, journalled in suitable bearings in or carried by the
dobby frames.
Loose upon the shafts 04, 05, respectively, are the worm wheels or drivers p, p,
driven continuously by a worm p³, arranged between them, said worm being
driven in suitable manner from some working part of the loom.
The outer faces of these worm wheels p, p, are shown provided with a
plurality of projections or teeth p3, p4, see Fig. 3, adapted to be engaged by
the lugs 5, 76, on the clutch boxes p7, 78, fulcrummed at 9 on the
carriers P 10 fast on the pattern shafts 04, 05.
The lugs 25, p, are arranged to travel through suitable slots in their respec-
tive carriers 10, which serve as guides, the said clutch boxes being provided
respectively with contacting or abutting faces 11 to be engaged by one or
the other of the sliding collars p 12, 13, mounted respectively to slide loosely
on the pattern shafts 04, 05.
. Either of the collars p 12, p 13, when moved to the right Fig. 2, will engage
the clutch box mounted upon the same shaft therewith, and will swing said
-clutch box also to the right to cause its clutch lug 25 or p6 to enter between
two of the projections or teeth on its adjacent worm wheel in order to drive the
parts.
When the sliding collar 13 is returned again to its outermost position Fig. 2,
the clutch box drops back to disengage the worm wheel from the shaft and thus
stop rotation of the latter and consequent movement of its pattern surface.
Referring now, particularly, to Fig. 3, the frame A is provided with an in-
wardly extended bracket a carrying a stud r upon which are loosely journalled
the clutch actuating lever r¹ and the two co-operating clutch actuating
arms 2, 3, see Fig. 5,
A lug 4 on the inner end of the lever r stands between ears r5, 6, on the
respective arms r2, r3, so that rocking of the lever in one or the other direc-
tion; causes corresponding and positive movement of one or the other of the
arins 2, 3, spiral springs 7, 8, interposed between the said arms r2, r3,
and the lever tending to return said arms towards their positions, see Fig. 5.
The arms 2, 3, are provided respectively with clutch fork pins r9, r 10,
which enter circumferential grooves in the peripheries of the collars p12, p 13,
whereby the lever r¹ and its arm r2 when rocked, for instance in the direction
of the arrow, Fig. 5, will act to withdraw the collar p 12 and disengage the
shaft o4 from its worm wheel 2, to stop the pattern surface o while at the same
time, the spring r8 will force the arm r3 also in the direction of the arrow
•

page_text: Fig. 5, to act through the collar p 13 to engage the shaft o5 with the worm
wheel p and start rotation of the pattern surface o¹.
Rocking of the lever in the direction opposite the arrow Fig. 5, will cause the
arm r3 to be positively moved to disengage its clutch p8 and the spring r7,
to move its arm r2 to engage its shaft with and to be rotated by the worm
wheel p.
Rocking of the lever r¹ thus causes the pattern surfaces o and o¹ to be alter-
nately or successively operated, the compressed springs 7, 8, permitting move-
ment of the said lever after one shaft has been clutched to make certain the
positive disengagement of the other clutch and its shaft, said spring being also
necessary to enable one or the other of the arms to remain momentarily unmoved
after the initial movement of the lever, until a space between two of the pro-
jections on the adjacent rotating worm wheel reaches such a position as will
permit its clutch lug to spring into locking engagement with said projections.
The clutch actuating lever is actuated in suitable manner in the present
instance, by a bell-crank lever s fulcrummed at on the frame A and con-
nected by a link with the lever arm g7, referred to, the rising and falling
movement imparted to the said lever by the pattern surface hA causing vibration
of the levers and also of the clutch actuating lever r¹, a spring s3 acting on
the levers to move the parts in the opposite direction it has been moved by
said pattern surface h 4.
Referring now to Figs. 1 and 4, the pattern surfaces o and o¹ are suitably
formed with pins or projections or, which are adapted to act upon the selecting
surfaces a 20, a 21, herein shown as on the arms a 22 and a 23, of the select-
ing fingers a fulcrummed at a 2 and constructed in suitable manner to cause
the shifting of the hooks of the dobby, not shewn, said fingers a in the present
instance, being shown as provided at their inner, ends with the horns $2 and
pockets for the reception of the rods b.
In the construction herein shown, the arms a 22 and a 23 stand at right angles
with each other, so that one is acted upon by and at the top of its pattern
cylinder, and the other by and at the side of its pattern cylinder, the latter for
this purpose being arranged at a lower level than the former.
The surfaces o, o¹, move continuously and the clutch devices and their
actuating mechanisms are so adjusted that the pattern surfaces are always
stopped in a position as shown in Fig. 4, with the selecting surfaces a 20, a 21,
standing in position opposite the space between two adjacent or successive pro-
jections of their pattern surfaces, in other words, fany projection be it a
protuberance or peg lifting its selecting surface is made or permitted to pass
that selecting surface, before the chain carrying that projection is stopped, by
so doing, the said chain is always left in readiness to immediately engage and
move its selecting surface when again set in motion.
By stopping each pattern surface, with its co-operating selecting surface in
position between two of the pattern surface projections, said pattern surface
is always in readiness to move said selecting surface on initial movement of
the pattern surface enabling the change from one pattern to the other to be
effected more quickly than is possible with mechanisms of this class, as at
present constructed.
The next part of my invention has reference to looms employed in cross weav-
ing or leno work.
In looms of this class, the warp threads are usually divided, those which are
to be carried in the usual manner through the loom being drawn from a separate
beam from those which are to be crossed.
These latter threads which have to be crossed when drawn from the beam,
have hitherto been passed over a guide or whip roll, made movable and con-
nected with some moving part of the loom to cause it to be vibrated in required
manner to give out and take up the warp threads, as may be necessary to enable
said threads to be crossed yet be always maintained under suitable tension.

page_text: One object of this part of my invention is to provide improved means for
vibrating the guide referred to, or an equivalent guide, and for holding the
same in position under the tension of the warp threads drawn thereover."
In the drawings, Fig. 7, in front elevation, shows a sufficient portion of a
loom embodying my invention to enable said invention to be understood.
Figs. 8 and 9, cross sectional diagrams, showing the parts in different positions.
Figs. 10 and 11, side elevation and top or edge view, respectively, of the
actuating levers to be described, and
Fig. 12, a detail perspective of the preferred form of connecting means be-
tween the harness lever, the auxiliary harness moving mechanism and the
harness frame.
Referring to the drawings, showing my invention, the frame a, the jack
levers 4, the harness cords or straps 104, heald shaft u4, the rock shaft a 9,
its bell crank lever a 8 and actuating connection a 7 connected with the crank #6
are and may be of usual construction.
The warp threads are shown as divided into groups w, w¹, the threads w being
drawn from a suitably located beam w*, shown as mounted in an elevated
position on the loom frame, the threads w¹ being shown as drawn from a separate
beam w, mounted also in the loom frame but beneath the beam w³.
One set of threads, as w¹, are drawn in usual manner over the guide or whip
roll mounted in suitable, (it may be fixed), bearings in the loom frame, thence
through the eyes of the heddle in the desired harness frame of the loom.
The other set of threads, as w, which are the threads to be crossed, are drawn
from the beam w*, down and about the guide or whip roll pl, thence to and
through the eyes in the heddles of the necessary harness frame 4.
In accordance with my invention, the guide or whip roll p', is made to
vibrate, by mounting the same in the free ends of the depending arms 2, fast
on the shaft 3 journalled in the frame and to the lower end of which I have
jointed one end of a toggle lever 74 jointed at 75 to its co-operating toggle
lever 76, the latter at its opposite end being jointed at 7 to a fixed support
as the frame f.
The lever 4, is shown as provided with an arm p8 which extends beyond
the joint p5, and is connected by a link p9 with that one of the harness frames #4
which governs or co-operates in governing the crossing of the thread w¹, thereby
constituting one form of means connected with a moving part of the loom for
vibrating the whip roll or guide p¹ through the medium of the toggle lever
described.
When the harness frame to which the link 9 is connected is raised, it will
operate to buckle or bend the toggle levers as shown in Fig. 9, to thereby draw
the guide p towards the harness, to give out sufficient length of threads we,
to enable the same to be properly crossed as shown in said fig.
When the said harness frame is dropped, to its position Fig. 8, the toggle
levers are restored to their normal position as there shown, said levers then
holding said guide in fixed position.
An advantage of the invention is that when the levers 74 and 6 are in
their normal position Fig. 8, they lie in a direct line between the guide pl
and the fixed pin or point 27, on the frame, so that the tension of the threads ic,
tending at such times to draw the guide towards the harnesses, is received directly
by the said pin p7 and the frame and support, and not by the harness frame
or part to which it is connected and by which it is operated.
Referring now particularly to Fig. 7, the harness connections w4 for that
frame which is to be moved by the auxiliary mechanism, instead of being con-
nected directly with and to be moved by the harness lever for that frame, are,
connected, with one end of a link like connection r, shown as rigid in structure
and slotted in the form of an elongated loop or made double to straddle the said
harness lever passing beyond the latter to and connected with an arm r2 fast

page_text: on the rock shaft a 9 of the auxiliary harness moving mechanism, said link
being connected with said arm by a pin r3, see Fig. 12.
Intermediate its length, however, and in position close to and at the left of
the said harness lever Fig. 7, the link r is provided with another pin 4, so
that whenever the harness lever passing through the link is vibrated, it will
engage the pin r4 and through the latter and the link raise, and lower the
harness frame connected with said link, the latter at such times sliding freely
past and without moving the arm r2 of the auxiliary mechanism.
When, however, it is desired to move said harness frame, by the arm r2 of
the auxiliary mechanism, as for a half and return movement well understood
by those conversant with the art, said link slides freely past and without moving
the harness lever protruding therethrough.
The pins r3,r, constituting independent connections between the auxiliary
harness moving mechanism and frame, and the harness lever and frame enable
the latter to be moved by either said auxiliary mechanism or lever indepen-
dently, and without moving the other.
The arm r2 is shown as provided with a suitable rest r 2* to prevent the link r
dropping below its proper position.
'
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 is:―
1. In a loom, a plurality of pattern surfaces provided with suitably arranged
projections, and means to operate said pattern surfaces singly, the said selecting
surfaces being arranged to co-operate with the respective pattern surfaces,
together with means to successively stop said pattern surfaces each in position
with its selecting surface opposite the space between two projections of the
pattern surface, substantially as described, and shewn in Figs. 1, 2 and 3.
2. In a loom, a plurality of pattern surfaces provided respectively with suit-
ably arranged projections, means to operate said pattern surfaces singly, the
selecting surfaces being arranged to move the same selecting finger a arranged
to co-operate with the respective pattern surfaces, and means to successively
stop said pattern surfaces each in position with its selecting surface opposite
the space between two projections of the pattern surface, substantially as described.
3. In a loom, a plurality of pattern surfaces mounted to travel about fixed
axes; selecting surfaces; drivers mounted to rotate about axes coincident with
said fixed axes, means to rotate said drivers and clutch devices to successively
connect said pattern surfaces with their respective drivers, substantially as
described and shewn in Figs. 1 to 5.
4. In a loom, a plurality of pattern surfaces mounted upon shafts journalled
in fixed bearings; worm wheel drivers also mounted on said shafts but rotatable
independently of said pattern surfaces; clutch devices adapted to connect said
said shafts
drivers with their respective pattern surfaces, sliding collars on
adapted to engage and operate said clutch devices, and means to successively
move said sliding collars, substantially as described and shewn in Figs. 1 to 5.
5. In a loom, a plurality of pattern surfaces, arranged in fixed position, means
to successively move said pattern surfaces, an auxiliary pattern surface and
means controlled thereby to govern the successive operation of said first named
pattern surfaces, substantially as described and shewn in Figs. 1 to 5.
6. In a loom, the combination with a plurality of pattern surfaces, and means
to operate the same, of one or more selecting fingers provided respectively with
a plurality of arms each having a selecting surface arranged to co-operate with
a pattern surface, substantially as described and shewn in Fig. 4.
7. The combination with two or more selecting fingers arranged in a dobby
loom, of two pattern surfaces arranged in fixed positions in different levels, said
pattern surfaces co-operating with said selecting fingers, and means to actuate
said pattern surfaces, substantially as described and shewn in Figs. 1 to 4.

page_text: 8. In a loom, the combination with a vibrating warp guide, and actuating
means therefor, of connections between said guide and the loom frame to relieve
said actuating means from the tension of the warp threads on said guide, sub-
stantially as described and shewn in Figs. 8 and 9.
9. In a loom, the combination with the warp guide, a stationary support and
jointed levers connecting said guide and support, of means to relatively move
said jointed levers to thereby vibrate said guide, substantially as described and
shewn in Figs. 8 to 9.
10. In a loom, the combination with a warp guide, a stationary support, and
toggle levers connecting said guide and support and normally receiving the ten-
sion of the warp threads on said guide, of means connected with a moving part
of the loom to relatively move said toggle levers to vibrate said guide, substan-
tially as described and shewn in Fig. 8 and 9.
11. In a loom, the combination with the harness frames, a
warp guide, a
stationary support, and toggle levers connecting said guide and support, of a
connection between said toggle levers, and a harness frame for moving the former
by the latter, substantially as described and shewn in Figs. 8 and 9.
12. The combination with a loom frame, the harness frames, the warp beams,
and the warp guides, one of which is capable of vibration, of toggle levers con-
necting said vibrating guide with said loom frame, and connections between said
toggle levers, and a harness frame for moving the former by the latter, sub-
stantially as described and shewn in Figs. 8 and 9.
Dated this 5th day of July 1898
TASKER & CROSSLEY,
Patent Agents,
Halifax,
Agents for Applicant