Improvements in the Shedding, Change-box, and Picking Motions of Looms.
Year: 1896

page_text: Date of Application, 7th Mar., 1896
Complete Specification Left, 7th Jan., 1897-Accepted, 6th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Shedding, Change-box, and Picking Motions
of Looms.
I, GEORGE RICHARDSON of Low Mills Kendal in the County of Westmoreland,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the shedding, change-box, and picking motions of
looms, or to any one or two of such motions.
The particular type of the motions to which this invention relates is described
and illustrated in and by the Specifications of Letters Patent No. 21291 dated
the 6th November 1894, No. 21292 of the same date, and No. 600 dated the
10th January 1895.
One of the objects of the present invention is to enable the same appliances or
devices to be used for either a long or a short dwell open shed, for a medium or
short dwell closed shed, or for any two or more of them together. For this
purpose, the reciprocating hooked bars and the bar catches are duplicated and
each driving element has attached to it one of the second set of hooked bars, the
notches or hooks upon which are in the reverse direction relatively to those on the
other set of hooked bars.. The second set of hooked bars is driven arranged and
controlled in a similar manner and by similar means to the first set, but the under
connecting rod of the first set and the top connecting rod of the second set are
crossed and so arranged that they do not touch each other when working.
The oscillatory driving element has an additional lug to which one of the second
set of hooked bars is attached, and this lug may, in a closed shed loom, be utilised
also to close the shed.
The sliding driving element, if this be used instead of the oscillatory, are
constructed as short rectangular frames in or through which there is an opening
through which there. are arranged suitable guiding, retaining, and locking bars.
Its lower edge may slide in a trough constructed to contain oil for lubrication,
which trough may be adjustable lengthwise. Lateral guide bars for the elements
may also be used in any case.
The rocking lever, by means of which the bar catches are operated, is driven
from a special shaft which may itself be a rocking shaft or which may be rotary
and which may have its speed varied by means of change wheels or similar
devices.
When the apparatus is used as a high speed dobby, this special shaft rotates at
one half the speed of the loom crank shaft, and there may be arranged upon it two
sets of cranks, excentrics or the like, one set for the healds and the other set for
the change-boxes, the two sets being preferably capable of adjustment relatively
to each ether as required to operate the change-box and heald motions simultaneously
or otherwise, as may be desired. The special shaft may also operate the pattern
chain wheel in either direction by any suitable ratchet or star wheel motion or
other known equivalent mechanisms.
We may employ various retarding and locking devices for controlling the driving
elements. For example, with oscillating driving elements, each element may be

page_text: provided with two opposed inclined planes on the edge of the element, forming a
triangular projection therefrom. There is arranged across the whole of the
elements a cross bar, which, when an element is at rest, is at the base of one of the
inclined planes and thus prevents the movement of the element in one direction, its
movement in the other direction being prevented by a stop. One or both ends of
the eross bar is or are connected by suitable links or the like with a rocking arm
which is actuated from the rocking lever by an inclined plaue on a projection
therefrom acting upon a friction bowl on the rocking arm. The cross bar is thus
moved in one direction by the rocking lever and rocking arm. It is moved in the
opposite direction by a spring which may be attached to the rocking arm, and
which tends also to prevent irregular motion and accident... At the commencement
of motion of the element the cross bar is timed to rise and gradually pass over the
triangular projection, finally coming to rest at the base of the opposite inclined
plane, where the element is again held until its reverse motion is required, when
the cycle is repeated. The cross bar may be provided with a concentric friction
roller or rollers to prevent its rubbing contact with the inclined planes.
Each sliding element may also be similarly formed with a triangular projection
from the bottom of the opening formed therein. A rod passes through the
openings of all the elements and may be provided with friction bowls thereon to
ride upon the inclined faces of the triangular projections. When the howl rod is
at the bottom of any inclined plane, that element is held, and when. the rod is
lifted, it is free to move. The rod is controlled by engagement at both ends in a
curved or are slot in each of two rocking plates actuated from the main rocking
lever of the dobby, or by means of a lever connected with a cam motion on the
special shaft. In order to prevent shocks, the curved slot rocking plates may be
mounted upon a cranked lever, the outer arm of which is controlled by a spring.
An additional retarding holding or controlling device consists in mounting on
each of the bar catches a latch or hook capable of engagement with the hooked
bars which have double catches. The latches may be moved out of engagement
with the booked bars by fixed cams or inclined planes attached to the framing.
In the Specification of Letters Patent No. 21292 of 1894 hereinbefore referred
to, there is described a lever provided with a peg which may engage with a hole
in the pattern card or rest upon its surface, according to its position, which is
varied by the movement of a handle by the weaver. According to my present
improvements, this handle or an equivalent lever may be moved in one direction
by a spring and in the other direction by a wheel provided with cams, bowls, lags
and pegs or the like, fixed upon a shaft rotated by any suitable known ratchet
wheel, star wheel or toothed wheel gearing from the special shaft or a shaft driven
by it. The cams, howls, lags and pegs are arranged to correspond with the number
of holes in a row of the pattern card to complete a "round" in weaving, or a part
thereof, and the pattern barrel may be operated by a pinion on the special shaft
which drives an intermediate shaft and wheel having as many sections as there are
holes in the pattern card in a single or double row. On the pattern barrel axis
there is a star wheel driven intermittently from the intermediate wheel by means
of pegs thereon and held in the intervals by curved faces. There is one removable
peg for the star wheel in each section of the intermediate wheel, and each of the
sections is timed to represent one complete revolution of the loom shaft. Now, if
there be only one peg in the intermediate wheel, all the others being removed, the
pattern barrel will be moved once each time the number of revolutions of the loom
shaft equals the number of holes in the pattern card in a single or double row, and
the pattern barrel is therefore not moved until all the holes have been utilised, or
as many of them as may be desired, by the cam and lever arrangement. By this
means the number of cards required to form a pattern is greatly reduced. When a
double row of holes is used in the pattern cards, a circular tappet may be arranged
on the intermediate wheel shaft to slide the barrel as required. If desired the
pattern barrel may be operated by a ratchet lever and pawl, acting upon a ratchet
wheel, mounted upon a shaft, the ratchet wheel having suitable connections to turn

page_text: the pattern barrel as hereinbefore described with reference to the intermediate
wheel. The ratchet wheel may be held in position by a flat spring or bowl and
levers. Obviously the lags, and pegs or the like may be utilised in substitution for
the pattern cards.
For a short dwell or high speed, the special shaft may be connected directly with
the loom shaft. For a medium dwell, the special shaft is preferably operated by a
lever or arm which is driven through the agency of a short link or connecting rod
from the crank shaft. If desired however cams may be substituted and may be
arranged on either the crank or low shaft of the loom, or on the special shaft, with
suitable links levers or the like making connection with the rocking lever or its
shaft.
When it is desired to work the loom with a closed shed, the duplicate set of
hooked bars and har catches may be disconnected, and their returning bars, with
their connecting rods and accessories may be attached to the bar catches which
remain connected. Or, the returning bars and accessories may be attached to the
second set of bar catches, the hooked bars only being disconnected.
The change boxes are preferably mounted in practical equilibrium, being
counterpoised by weights or springs, or both in combination which may act
through a rack or pair of racks and wheel, or lever connected by chains, steel
bands or the like, guided by pulleys, to one end of a second lever the other end of
which has two sets of pulleys connected by two endless chains or steel bands to the
driven elements in such a manner that the attached boxes are pulled both upwards
and downwards as required, so that each driven element can act upon each of the
two chains independently thus enabling any of the boxes to be selected as required.
Catches or the like controlled by a cam on the loom shaft and moved into a notch
by the aid of a spring, may be used to hold the change-boxes in their exact
positions during use.
The motion of the hooked bars may be transmitted to the picking, shedding and
change-box mechanisms by means of a wheel, slide, or the like driving element
which is provided with a suitably shaped slot or groove, or slots or grooves, with
each of which a bowl on the end of a lever engages. The other end of the lever
or each lever is connected by a cord or link or cords or links, to the mechanism to
be operated. Each lever is raised or lowered according to the direction of movement
of the driving element with which it is connected, and can not have any independent
motion. The slotted element may however be substituted by equivalents, as for
example by one having on its edge two inclined faces which are engaged by two
projections or bowls from or upon a lever, oue on each side of its fulcrum. These
inclined faces are so arranged and formed that, as one of them lifts the bowl on its
side of the lever fulcrum, the other moves out of the way to permit the descent of
the other bowl. The lever is thus rocked and cannot move independently. One
end of the lever or both ends may be connected suitably with the mechanisms to
be operated. If desired instead of forming both the inclined faces upon one such
element, two of them, equally geared together, the case of rotary elements may be
used, and one inclined face be formed upon each to engage with one of the bowls
on the lever.
In order to retain the driving and driven elements and accessories in their
correct paths, they may be constructed to run in V-shaped grooves as is well
understood.
In substitution for the rocking lever, two geared wheels may be employed with
a crank on each wheel shaft or a crank pin on each wheel, the motion being
communicated by suitable connecting rods. One of these wheels may be driven
from the special shaft, and the pattern barrel, and other motions may be driven by
a second shaft geared to and at right angles with the special shaft.
Suitable appliances may be employed for throwing the picking motion out of
gear, when adjusting the change-boxes as may be required.
The special shaft hereinbefore described may be arranged to be thrown in and
out of gear by clutches or otherwise, for the purpose of adjusting the healds and

page_text: change boxes and it may also be capable of being disconnected from the pattern
barrel so that the barrel may be adjusted independently.
Dated this 6th day of Manch AD 1900
Improvements in the Shedding, Change-box, and Picking Motions
of Looms.
I, GEORGE RICHARDSON, of Low Mills, Kendal, in the County of Westmore-
land, Manufacturer, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention relates to the shedding, change-box, and picking motions of
looms, or to any one or two of such motions.
The particular type of the motions to which this invention relates is described
and illustrated in and by the Specifications of Letters Patents No. 21291 dated
the 6th day of November 1894, No. 21292 of the same date, and No. 600 dated the
10th day of January, 1895.
In order that the present invention may be more readily understood I have
hereto appended drawings to which I will hereinafter make reference, similar
letters or signs being used to indicate similar parts where they occur in the
different figures.
One of the objects of the invention is to enable the same appliances or devices
to be used for either a long or a short dwell open shed, for a medium or short
dwell closed or centre shed, or for any two or more of them together. For this
purpose, the reciprocating hooked bars E, E, e, e', and the bar catches C, C¹, c, c',
are duplicated, and each driving element has attached to it one of the second set
of hooked bars, the notches or hooks upon which are in the reverse direction
relatively to those on the other set of hooked bars. Both sets of bar catches are
driven from the arms A of a suitable rocking shaft through the connecting
rods B, B', b, b', the lower connecting rod B₁ of the first set and the upper
connecting rod b¹ of the second set crossing each other when working in such a
manner as not to touch. Figure 1 shows the application of this part of the
invention to a high speed short dwell double lift dobby provided with rotary or
partially rotary or oscillatory driving elements F, F. Each driving element is
provided with an additional lug or projection to which one of the second set of
hooked bars e, el is attached, the original hooked bars E, E', being attached at
points about diametrically opposite. The additional lug may, in a closed shed
loom, be utilised also to close the shed. G and G' represent the driven elements,
to which the various motions are connected.
Various retarding and locking devices may be employed for controlling the
driving elements. Figure 1 illustrates a form of device applicable for use with
the rotary driving elements F, F. There is formed upon the edge of each element
two inclined planes which produce triangular projections f, f', one on each element.
Arranged across the whole of the elements is a cross bar H, which, when any one
of the elements is at rest, occupies a position at the base of one of that element's
inclined planes, and prevents movement of the element in one direction, movement
of the element in the other direction being prevented by cross stays f which act
as stops. The cross bar H is arranged to move in the slide h and one or both of
its ends is or are connected by links or rods a to a rocking arm or lever a¹ which is

page_text: actuated by the arms A or their shaft, as, for example, by an inclined plane on the
latter engaging with a bowl or the like on the arm a', or the bowl may, if desired,
engage with a grooved cam. The cross bar is thus moved in one direction
positively and may be returned by the groove of the cam or by a suitable spring
attached to the arm, which spring also tends to prevent irregular motion and
accident. At the commencement of motion of an element the cross bar is timed
to rise and gradually pass over the triangular projection, finally coming to rest at
the base of the opposite inclined plane, when the element is again held until its
reverse motion is required, when the eyele is repeated. The cross bar may be
provided with a concentric friction roller or rollers to prevent its rubbing contact
with the inclined faces.
Figure 2 illustrates the application of a somewhat similar locking device to a
short dwell double lift open shed dobby having reciprocating driving elements,
and also illustrates the application to these elements of the duplicate bar catches
and hooked bars and their accessories. These elements consist preferably of
rectangular frames F, F, which are also illustrated in Figures 3 and 4 and are
capable of sliding to and fro in suitable guides, and are each provided on the inner
edge of its lower meinher with a triangular projection . Extending across and
through the elements is the cross bar H, which, as before, locks any elemeut in
place or prevents it moving in one direction when it occupies a position at the buse
of the triangular projection. The cross bar is raised to free any element by the
engagement of its ends with the curved or are slots formed in the rocking plates R,
which are oscillated by the rod or rods a from the rocking armas A. Any other
suitable cam or other motion may however be employed to effect the necessary
movement of the bar. In order to avoid shocks it is preferred to mount the
rocking plates R upon one arm of spring controlled crank levers or the like r.
In Figure 3 is illustrated a further form of locking or retarding device applied
to a long dwell single lift open shed dobby, and which may be employed alone or
in conjunction with either of the two forms of locking device previously described
and illustrated. In this arrangement each of the bar catches C, C, carries a
latch, hook, or the like, L, capable of engagement with the hooked bars E, which,
for the purpose, are provided with double catches. With this locking device,
each bar catch when engaged with a hooked bar, prevents it moving in either
direction or moves it in either direction according to whether the bar catch is at
rest or moving, until the latch L is thrown out of engagement by coming into
contact with the fixed cams or inclined planes or stops l, which may, if desired, be
placed at both ends of the stroke. A modified form of latch is also shown in
Figure 5. Figure 3 also illustrates the employment of a special rocking shaft S
which operates the rocking arms A through the medium of the connecting rods.
This special shaft may simply rock or it may rotate, and when constructed to rock
only, may, if desired, be connected directly with the loom shaft, but, for a medium
dwell, it is preferably operated by a lever or arm which is driven through the
agency of a short link or connecting rod from the crank shaft. If desired,
however, cams may be substituted and may be arranged on either the crank or low
shaft of the loom, or on the special shaft, with suitable links, levers, or the like
making connection with the rocking lever or its shaft. A rotary special shaft is
illustrated in Figure 6 and will be hereinafter described.
When it is desired to work the loom with a closed shed, the duplicate set of
hooked bars and bar catches may be disconnected, and their connecting rods may
be attached to the bar catches which remain connected, or the hooked bars alone
may be disconnected or thrown out of action, or the bar catches may operate to
return the elements to the closed or central positions. See Figure 4.
As hereinbefore described the rotary form of driving element may be provided
with an additional lug which may be utilised to close the shed in a closed or centre
shed loom. One method of effecting this is illustrated in Figure 6, one only of the
driving elements being shown. M is the additional lug and it is arranged between
cross bars from the upper limbs N, N, of two bell-crauk levers, the lower limbs of

page_text: which N', N', are engaged with one another in such a manner that the movement
of one is partaken of by the other but in the opposite direction. The upper limbs
of the levers move away from one another to allow movement of the driving
elements F, and close together to return them to the closed position. The necessary
movement may be obtained by connecting one of the levers by means of a suitable
link or the like n to one of the bar catches, or by connecting the other by means
of a link n¹ to a projection from one of the rocking arms. A pair of the bell-crank
levers will, of course, be mounted upon each side of the frame, and cross bars
connecting their upper extremities engage with all the additional lugs upon the
driving elements..
Figure 4 illustrates this closing device as modified for adaptation to reciprocating
driving elements. In this case cross bars O, O', capable of sliding longitudinally
extend across the series of driving elements and are reciprocated by the bar
catches c, to which they are connected by the links n². The cross bars are moved
away from one another to allow movement of the elements, and move towards one
another to close the shed, and return all the elements to their central positions as
shown in the figure.
Figure 5 illustrates a long dwell single lift open shed dobby having rotary
driving elements the edges of which are formed V-shaped in section to engage
with corresponding recesses in the edges of the driven elements, or the latter may
have the V-shaped edges and the former he recessed. Similar equivalent devices
may be employed to ensure the lateral steadiness of the elements, and they, as well
as the one described, are equally applicable to the other forms of elements and
dobbys herein described and illustrated. In this figure also is illustrated a locking
cross bar H, which is so connected to its connecting rod a, as to diminish or obviate
the risk of breakage or damage upon any irregularity of movement of the moving
parts of the dubby. To effect this the locking cross bar H is mounted upon a
sleeve capable of sliding upon the rod a and is held in its locking position by a
suitable helical spring surrounding the rod a. Another method of operating this
as well as the before described locking bars is here illustrated. The connecting
rod a is attached to one end of a crank lever J the other end of which may be
connected to a grooved cam or the like on the loom shaft so as to operate the
cross bar once during each revolution at the moment the healds are changing, and
to hold it in place during the rest of the revolution.
Figure 6 also illustrates the application to a closed or centre shed dobby having
medium dwell, of a rotary special shaft which operates the rocking lever and gives
the desired dwell, and which may be easily altered to render it equally applicable
to the other forms of dobby. The special shaft S is driven by spur or other
gearing from another shaft Y which is driven from the loom shaft and may be
provided with a clutch to enable it to be disconnected and permit adjustment of
pattern wheel. The spur wheel on the special shaft S or a disc attached to the
shaft carries a crank pin which is attached by the short link w to a swinging
arm W which in its turn is connected by the connecting rod to the rocking
arms A. At each end of the stroke of the crank pin a dwell is given to the
swinging arm and consequently to the rocking arms. To vary the amount of
dwell for use with other sheds the circular spur wheels may be substituted by
excentric, elliptical, or non-circular wheels. Figure 6 represents the general
arrangement of a closed or centre shed dobby having rotary driving and driven
elements.
When the apparatus is used as a high speed dobby the special shaft rotates at
one half the speed of the loom crank shaft, and there may be arranged upon it two
sets of cranks, excentrics or the like, one set for the healds and the other set for
the change-boxes, the two sets being preferably capable of adjustment relatively to
each other as required to operate the change-box and heald motions simultaneously
or otherwise as may be desired. The special shaft may also operate the pattern
chain wheel in either direction by any suitable ratchet wheel motion or by any
other known equivalent means.

page_text: In the Specification of Letters Patent No. 21292 of 1894 hereinbefore referred
to, there is described a lever provided with a peg which may engage with a hole
in the pattern card or rest upon its surface, according to its position, which is varied
by the movement of a handle by the weaver. According to my present improve-
ments, this handle or an equivalent lever may be moved in one direction by a
spring and in the other direction by a wheel provided with cams, bowls, pegs and
the like fixed upon a shaft rotated by any suitable known ratchet wheel, star wheel
or other suitable gearing from the special shaft or a shaft driven from it. The
cams, bowls and the like are arranged to correspond with the number of holes in a
row of the pattern card to complete a ruund in weaving, or a part thereof, and the
pattern barrel may he operated by a pinion on the special shaft which drives an
intermediate shaft and wheel having as many sections as there are holes in the
pattern card in a single or double row. On the pattern barrel axis there is a star
wheel driven intermittently from the intermediate wheel by means of pegs thereon
and held in the intervals by curved faces. There is one removable peg for the
star wheel in each section of the intermediate wheel, and each of the sections is
timed to represent one complete revolution of the loom shaft. Now, if there be
only one peg in the intermediate wheel, all the others being removed, the pattern
barrel will be moved once each time the number of revolutions of the loom shaft.
equals the number of holes in the pattern card in a single or double row, and the
pattern barrel is therefore not moved until all the holes have been utilised, or as.
many of them as may be desired, by the cam and lever arrangement. By this.
means the number of cards required to form a pattern is greatly reduced. When
a double row of holes is used in the pattern cards, a circular tappet may be
arranged on the intermediate wheel shaft to slide the barrel as required. If desired,
the pattern barrel may be operated by a ratchet lever and pawl, acting upon a
ratchet wheel mounted upon a shaft, the ratchet wheel having suitable connections.
to turn the pattern barrel as hereinbefore described with reference to the.
intermediate wheel. The ratchet wheel may be held in position by a flat spring or
bowl or lever. Obviously lugs, pegs, or the like may be employed in substitution
for the pattern cards.
The change boxes are preferably mounted in practical equilibrium, being
counterprised by weights or springs, and they may he so arranged and attached to
the driven elements as to be pulled both up and down. Figure 7 illustrates one
method of accomplishing this, two of the driven elenients for operating the change.
boxes being shown. G and G represent the driven elements. The upper one G
is provided with two chain wheels or pulleys 1 and 2 and the lower one G' is
siniilarly provided with wheels 3 and 4. Arranged above the driven elements
is a lever Q pivotted at g. A chain, band or cord is attached to one end of
this lever, and passes round the wheel 1 on the element G, around the wheel 6 on
the lever Q, around the wheel 3 on the driven element G, its other end being
returned to and attached to the lever Q. Arranged below the elements is a
lever U pivotted at u. A chain or the like is attached to the lever U, passes up
and around the wheel 4 on the driven element G', returns to the lever U and passes
round the wheel 8, passes up to and around the wheel 2 on the driven element G
and returns to and is attached to the lever U. The other end of the lever U is
attached by a chain to the change-boxes or to a projection therefrom K, by means
of a chain 9 which is attached to the lever as indicated at 10. K is the balance
lever for the boxes.. One of the ends of the chain 9 passes over a wheel 11
secured to the framing, thence downwards and so around the wheels 12, 13, and 14
to a point of attachment k on the change box mechanism. The other end of the
chain passes downwards and around wheels coaxial with the wheels 12 and 13 to
the second point of attachment k¹. The operation is as follows. When the upper
driven element G is depressed and the lower one is held in place the corresponding
end of the lever Q is drawn downwards. The other end of the lever is therefore
raised and by means of the chain 15 passing around the wheel 16 draws down one end
of the lever U, which by its connecting cord or the like draws down the boxes X.

page_text: When the lower element G'is raised the attached end of the lever U is also raised
and the boxes are lifted. In order to avoid risks of accidents and breakages the
lever U is preferably of the construction shown. It is formed in two halves x, y,
suitably pivotted together, and held together so as to normally form one solid lever
by the spring and cord 17 passing around a pulley on one half and attached to
the other half. In the event of any undue strain being thrown upon the lever its
two halves are capable of separating and thus saving the parts which are attached
to them. Catches or the like which are not shown in the drawings may be
employed to hold the boxes in their exact positions during use.
Figure 8 illustrates a modification of the arrangement for connecting the driven
elements to the boxes. As before, G and G¹ represent two of the driven elements.
The upper one G has a chain 5 attached to it, this chain passing around a wheel
on the lever Q and having its other end secured to the element G. This latter
element has also attached to it a chain 7 which passes around a wheel on the
lever U and is then secured to the upper element. The outer end of the lever Q
is connected to the end of the lever U by a chain 15 as herein before described.
Assuming the lower element to be held fast and the upper one to move downwards,
the inner end of the lever Q will be drawn downwards, and its outer end will rise
and draw down the lever U which in its turn will communicate motion to the boxes
as illustrated by Figure 6. Assuming the lower element to rise and the upper one
to be held fast then the lever U will be raised. Should both elements move
together a movement of double the extent will be imparted to the lever U. Either
of the arrangements illustrated in Figures 7 and 8 are equally applicable to
circular box looms,
When the duplicate set of hooked bars, bar catches, and their accessories are
employed it becomes necessary to employ two sets of needles to be operated from
the pattern wheel or the like to select the proper hooked bar to be put into action.
This duplicate arrangement of the needles is illustrated by Figure 9. One of the
needle grates Z is shown in plan perforated for the passage of two rows of needles.
It will of course be understood that two of these grates are employed, one directly
beneath the other. Two of the needles are indicated at p, p, each being formed
with an enlargement or opening for the reception of the end of one of, the hooked
bars. The needle p is intended to operate one of the lower set of hooked bars and
it is placed in position with its enlargement or recess above the lower needle grate.
The other needle p' is for use with the upper set of hooked bars and is placed with
its enlargement above the upper needle grate. The needles may be operated in
any known and convenient manner.
In substitution for the rocking arms hereinbefore described, two geared wheels
may be employed with a crank on each wheel shaft or a crank pin on each wheel,
the motion as before being communicated by suitable connecting rods. One of
these wheels may be driven from the special shaft and the pattern barrel, and the
other motions may be driven by a second shaft geared to and at right angles with
the special shaft.
Suitable appliances may be employed for throwing the picking motion out of
gear when adjusting the change boxes as may be required.
The special shaft herein before described may be arranged to be thrown in and
out of gear by clutches or otherwise, for the purpose of adjusting the healds and
change-boxes, and it may also be capable of disengagement from the pattern barrel,
so that the barrel may be adjusted independently.
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 :-
1. In dobbys for looms, the combination with the driving and driven elements
of duplicate sets of hooked bars, bar catches and their accessories, all operated and
arranged substantially as hereinbefore described and as illustrated by Figures 1
and z of the accompanying drawings.

page_text: 2. In debbys for looms, the combination with the driving elements of locking
and retarding devices, constructed arranged and operating substantially as herein-
before described and as illustrated by the accompanying drawings.
3. In dobbys for looms, a latch or the like secured to a bar catch and adapted to
engage with and be disengaged from the hooked bars, substantially as hereinbefore.
described and as illustrated by the accompanying drawings.
4. In a dobby for looms, a reciprocating driving element consisting of a
rectangular or equivalent frame provided with an opening for the passage of suitable
guiding, retaining and locking bars, constructed and arranged substantially as
hereinbefore described and as illustrated by the accompanying drawings.
5. In a closed or centre shed dobby, the combination with the rotary or partially
rotary driving elements of additional lugs or projections which may be utilised in.
closing the shed, substantially as and by the means hereinbefore described and as.
illustrated by Figure 6 of the accompanying drawings.
6. In closed or centre shed dobbys, the combination with the driving elements of
devices or appliances for closing the shed, constructed arranged and operated
substantially as herein before described and as illustrated in Figures 4 and 6 of the
accompanying drawings.
7. In loom dobbys, driving and driven elements the edges of which are formed
with projections and recesses respectively or are otherwise formed to ensure lateral
steadiness, substantially as herein before described and as illustrated in Figure 5 of
the accompanying drawings.
8.. In a loom dobby of the type described, a special rotary shaft which operates
the rocking arms, constructed arranged and operating substantially as hereinbefore.
described and as illustrated by Figure 6 of the accompanying drawings.
9. In a loom dobby, the combination with the driven elements and the change-
boxes of devices for giving a positive motion in each direction, such devices being
arranged and operated substantially as bereinbefore described and as illustrated.
by Figures 7 and 8 of the accompanying drawings.
10. In a loom dobby, an arm or lever provided with a peg or projection adapted
to engage with any oue of the rows of holes in the card cylinder, the said arm or
lever being automatically adjusted by means of a shaft provided with cams or the
like, substantially as herein before described.
11. A. loom dobby constructed arranged and operating substantially as herein-
before described and as illustrated by the accompanying drawings.
W. E. HEYS & SON,
Agents for the Applicant..