An Improved Shedding Motion of Looms for Weaving.
Year: 1889

page_text: Date of Application, 28th Feb., 1889
Complete Specification Left, 28th Nov., 1889-Accepted, 4th Jan., 1890
PROVISIONAL SPECIFICATION.
An Improved Shedding Motion of Looms for Weaving.
I, EDWARD HOLLINGWORTH, of the firm of Hutchinson Hollingworth and Company
Limited, of Dobcross, near Huddersfield, Yorkshire, Loom Makers, do hereby declare
the nature of this invention to be as follows:-
My invention has reference to means to be employed for operating the healds in
looms, and consists in the use of a space wheel driven by bevel wheels on the top of
the ordinary upright shaft, which receives its motion from the crank shaft. The space
wheel is made with cogs or teeth on only a part of its periphery, the other part being
without teeth. In connection with this wheel is a spur wheel, gearing with another
spur wheel, both of which are driven intermittently by the space wheel, but such spur
wheels "dwell" or remain stationary, where the teeth are absent from the space
wheel, during which "dwell" a locking plate is riding on a rim on the face of the
space wheel. On the face of the two spur wheels is fixed a crank pin to which is
attached one end of a connecting rod, the other end of said rods being attached to the
knives or shedding bars, so that as the said spur wheels receive their intermittent
rotary motion from the space wheel, an intermittent reciprocatory motion is given to
the knives or shedding bars, whereby the ordinary jack levers for raising and lowering
the healds are operated as they are selected by the pattern surface. In consequence
of employing a space wheel so as to produce a dwell in the movement of the parts at
a given point, the shuttle is enabled to pass through the "shed" whilst the parts are
stationary. Instead of employing a space wheel for imparting intermittent motion to
the spur wheels and connecting rods, I may use eccentric wheels which will drive the
spur wheels and connecting rods at unequal speeds, giving them a dwell at a
certain part of a revolution so as to give time for the shuttle to pass through
the shed.
A considerable advantage is also found in attaching the connecting rods to the
face of the driven spur wheels, as the movement of said rods is much slower when
the crank pins are passing over the centres of the wheels, and this slow movement takes
place during the time the pegging cylinder or pattern surface is making the necessary
changes, consequently a little more time is given to the pattern surface in which to
make the change.
By the construction and arrangement of the parts herein mentioned, I produce a
shedding motion reliable in its action, and also steady and smooth in its movements.
Dated this 27th day of Fahru 1880
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
An Improved Shedding Motion of Looms for Weaving.
I, EDWARD HOLLINGWORTH, of the firm of Hutchinson Hollingworth and Company
Limited, of Dobcross, near Huddersfield, Yorkshire, Loom Makers, do hereby declare
the nature of this invention and in what manner the same is to be performed, to
he particularly described and ascertained in and by the following statement :-
This invention has reference to means to be employed for operating the healds in
looms, and more particularly to that known as the "closed shed." My improvements
therein consist in the use of a space wheel driven by bevel wheels on the top of the
ordinary upright shaft, which receives its motion from the crank or other suitable
shaft. The space wheel is made with cogs or teeth on only a part of its periphery,
the other part being without teeth. In gear with this wheel is a spur wheel, driving

page_text: 6
"
two other spur wheels, both of which are driven intermittently by the space wheel,
but such spur wheels dwell
or remain stationary where the teeth are absent from
the space wheel, during which "dwell" a locking plate is riding on a rim on the face
of the space wheel. On the face of the two spur wheels is fixed a crank pin to which
is attached one end of a connecting rod, the other end of said rods being attached
to the knives or griffe bars, so that as the said spur wheels receive their intermittent
rotary motion from the space wheel, an intermittent reciprocatory motion is given to
the knives or griffe bars, whereby the ordinary jack levers for raising and lowering the
healds are operated as they are selected by the pattern surface..
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 front
elevation and Fig. 2 plan view of apparatus I employ for operating the healds on the
principle known as the "closed shed." This apparatus is preferably placed on the top
or end of the loom framing shewn at A. The framework for carrying my improved
mechanisin is shewn at B supported by bracket (also connected to the loom side.
The upright shaft D has a continuous rotary motion imparted to it from the crank
shaft of the loom, which is a characteristic feature in the Hollingworth and Knowles'
fast running loom. On the upper end of the vertical shaft D is a bevel wheel E
driving another bevel wheel Ffixed on the horizontal shaft G, whilst on the opposite
end of said shaft is a crank H carrying a pin or stud a which takes into one of the
notches in the star wheel I fastened on the end of the pattern or chain cylinder J
provided with bowls or pattern pulleys so that for every revolution of the crank
shaft, the pattern or chain cylinder is operated for the purpose of presenting fresh
pattern bowls to horizontal vibrating bars K as hereinafter explained, such pattern
chain mechanism being a characteristic feature in the Hollingworth and Knowles'
loom and forming no part of my present invention. On the horizontal shaft G is a
segment or space wheel L, having teeth on only a part of its periphery, such teeth, at
every revolution of the crank shaft, taking into gear with a toothed wheel M fixed on
the horizontal shaft N having at both ends toothed crank wheels or discs O and O'
(this latter wheel not seen) gearing with and driving toothed crank wheels or discs P
and P on the end of another horizontal shaft Q placed immediately above the other
horizontal shaft just mentioned and which is lettered N. It is therefore apparent that,
for every revolution of the space wheel, the toothed crank wheel or wheels 0, 0¹,
P, P, just mentioned, will have an intermittent rotary motion given to them, the
object of which intermittent motion is to allow the shed to be at rest or dwell during
the time the shuttle is being sent across the loom, which is a desirable object to attain,
when the looms are broad. During the time the space wheel is dwelling, a locking
plate R fixed on one side of the plate wheel M is riding or resting upon a rim c
projecting from the inner face of the space wheel L, and this is employed so as to
cause the cranked discs to remain stationary when the teeth in the space wheel are
absent. The apparatus for operating the healds consists of connecting rods S, S¹,
and T, T', which are attached to the faces of the toothed discs; the crank pins d, it
will be observed, are fixed at opposite sides of the two shafts N and Q, and this
is done for the purpose of imparting a to and fro motion to the griffe bars or
knives U and V, which are attached to the opposite ends of the connecting rods S, S¹,
and T, T, so that as the said cranked discs revolve, the said bars are made to
move backwards and forwards horizontally for the purpose of catching hold of one
or other of two notches e and projecting from the horizontal vibrating bars K
which vibrating bars rest upon the pattern pulleys 6, therefore if one of the bowls
or pulleys b is presented to a vibrator bar, such bar will be raised into the position
shewn in dotted lines in Fig. 1 of the Drawings, the effect of which will be that
when the upper griffe bar Ŭ advances in the direction of the arrow, a catch or
hinged clapper thereon will take hold of the notch f on the upper side of the
vibrating bar K, consequently such bar will be pushed forward, and as the opposite
end of the said vibrating bar is attached to the bell crank or jack lever W, such jack
lever will be made to oscillate upon its fulcrum g, whereby the healds will be operated,
as will be well understood; but if no pattern bowl b is presented to the vibrating

page_text: lever K, the notch e on the underside of the said vibrator will engage with the lower
griffe bar V, thus causing the jack lever W to oscillate in an opposite direction to
the previous movement described, consequently the healds will be operated in the
reverse direction, opening and closing the shed accordingly. The levers X and Y
and transverse bars Z are employed for the purpose of bringing the bell crank jack
levers W to one position, common in all closed shed looms, and therefore need not
be particularly described here, as they form no part of my invention.
By means of a space wheel L and the parts connected therewith and shown in the
drawings, a reliable shedding motion is obtained, steady and smooth in all its move-
ments, in addition to which, a considerable advantage is found in attaching the
connecting rods S, S¹, and T, T¹, to the face of the driven cranked discs, as the
movement of the said rods is much slower when the crank pins are passing over
the centres of the wheels, and this slow movement takes place during the time the
pegging cylinder or pattern surface is making the necessary changes, consequently a
little more time is given to the pattern surface in which to make those changes, whilst
the dwell given to the shed by the intermittent motion of the cranked dises during the
time the shuttle is crossing the loom will be found of great advantage.
The apparatus above described is shewn as applied to that class of loom where the
healds are operated by means of bell crank or jack levers, but Fig. 3 of the accoin-
panying drawings shews how my improved shedding motion can be applied to upright
jack levers instead of bell crank levers, Fig. 4 of the drawings being a plan view of
Fig. 3. The principal parts of the mechanism already described are employed, and
the same parts of mechanism are marked with the same letters of reference as those
already described. The principal difference between the two arrangements consists
chiefly in that I displace the bell crank lever W and employ a vertical jack lever W,
as clearly shewn in Fig. 3, and in detail Fig. 5, where it will be observed that to each
vertical jack lever is hinged at point h a vibrating bar K, provided, as in the previous
case, with notches e and f for being taken hold of (according to the arrangement of
bowls b) by the griffe bars U and V, the backward and forward movement of which
gives the necessary oscillating motion to the upright jack W upon its fulcrum g,
whereby the healds are operated or raised and lowered accordingly. In the arrange-
ment shewn in Fig. 3, the pegging wheel H carrying the pin a is not fixed upon the
horizontal shaft G, as in the previous illustration, but upon a separate stud and driven
by spur wheels Z2 and Z3 froin the upright shaft D, as indicated in the drawings.
ん
Instead of employing a space wheel for imparting intermittent motion to the spur
wheels and connecting rods already shewn and described, I may use eccentric or
elliptical wheels arranged to drive the spur wheels and connecting rods at unequal
speeds, causing them to dwell at a certain part of each revolution, so as to give time
for the shuttle to pass through the shed. This part of my invention is shown at
Fig. 6, which is elevation of so much of the parts as is necessary to explain the same,
whilst Fig. 7 is end view of Fig. 6. A represents the loom framing, to which is
attached the bracket B for supporting the Jacquard mechanism. D is the vertical
shaft, deriving its rotary motion from the crank shaft of the loom, as already
explained; in this case, however, the vertical shaft has a variable speed, which is
obtained by means of an eccentric or elliptical wheel H fixed on the crank shaft,
such wheel being in gear with another eccentric or elliptical wheel J, forming part of
or attached to the bevel driving wheel K, consequently a variable speed is given to
the vertical shaft D, and by means of the bevel wheel E on the top thereof, and spur
wheels Land M, the varying speed is imparted to the cranked wheels or discs O
and P, and through them to the connecting rods S and T in the same or a similar
manner to that already described.
The advantages of the connecting rods being attached to the face of the cranked
discs, as already referred to, are obtained here also, the movements of the said
connecting rods being much slower when passing over their centres than at any
other part of their revolution, the slowness of the motion being taken advantage of for
the pegging cylinder to make its changes.

page_text: Having now particularly described and ascertained the nature of my, said inven-
tion, and in what manner the same is to. be performed; I. declare that, what. I
claim is :-
.
Firstly: In a shedding motion of looms for weaving, the employment of a con-
tinuously driven space wheel L, operating intermittently cranked discs for opening,
and closing the shed substantially as described.
Secondly. In a shedding motion of looms for weaving, the employment of a con-
tinuously driven space wheel, operating intermittently cranked discs and transverse
griffe bars for opening and closing the shed, in combination with a locking plate R,
riding on a rim of the space wheel during the time the cranked discs are dwelling.
Thirdly: In a shedding motion of looms for weaving, the employment of a continu-
ously driven space wheel L, operating intermittently cranked discs and connecting
rods for operating the vibrating bars K and the jack or bell crank levers W.
Fourthly. In a shedding motion of looms for weaving, the combination of the space
wheel L for causing the shed to dwell, arranged as described, in combination with the
pattern or chain cylinder J.
Fifthly. In a shedding motion of looms for weaving, the employment of connecting
rods S, S¹, and T, T¹, one end of such rods being attached to the griffe bars and the
other end attached to toothed cranked discs, the crank pins d being arranged to be
passing over their centres during the time the pattern or chain cylinder is revolving
or making the changes.
Sixthly. In a shedding motion of looms for weaving, the driving of same by
eccentric or elliptical wheels for the purpose of causing the parts to dwell or to slacken
their speed during the time the shuttle is being sent across the loom, in combination
with cranked toothed discs and connecting rods as described and shewn in Figs. 6
and 7.
Dated this 27th day of November 1889
TASKER & CROSSLEY,
Huddersfield, Agents.