Improvements in the Shedding Mechanism of Looms for Weaving.
Year: 1893

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883) as allowed
by the decision of the Comptroller General of the 23rd day of June 1898.
PROVISIONAL SPECIFICATION.
Improvements in the Shedding Mechanism of Looms for Weaving.
I, JOHN WARD, of Ingham Street Iron Works, Blackburn, in the County of
Lancaster, Dobby Maker, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in the dobbies or shiedding mechanism
and box motion or mechanism for controlling the change shuttle boxes of looms
for weaving, the object being to control both the healds and boxes by the dobby
so as to ensure the change of pattern taking place at the correct time and all the
parts acting in unison.
The invention consists
Firstly Of improvements in measuring motions to be applied to dobbies
for changing the pattern barrel at any predetermined time or at overy revolution
of the lattice.
Secondly Of improvements in the method of connecting the baulks, baulk
levers and catches or draw hooks of dobbies.
Thirdly Of improved apparatus for controlling the catches or pawls for operating
the ratchet wlieels in dobbies.
Fourthly To improved apparatus for holding the rocking lever steadily in
the raised position.
The improved measuring motion consists of a ratchet wheel bolted to a diso and
carried on a cross shaft of the dobby. The ratchet wheel is operated by a catch
carried on a rocking crank lever connected by link to one of the tumbler levers.
In the periphery of the disc is a recess or notch and resting on said disc is the
beak of a lever one end of which is free to turn on a fulcrum stud and the other
end is by link connected to a hooked lever carried on the or rocking lever of
the dobby. The disc is adjustable on the ratchet wheel and can be so set that
when the ratchet wheel has advanced a predetermined number of teeth the notch
in the disc comes under the beak in the lever, and the latter is allowed to fall
and by its connections raise the hooked lever so that at the next forward move-
ment of the rocking lever the hooked lever engages with and releases the ordinary
vertical catch lever of the rocking lever carrying the barrels so that a change of
barrel will take place at any predetermined time the other barrel at the required
time being again brought into operation in the ordinary manner. When it is
desired to change the pattern at every revolution of the lattice the ratchet wheel
disc and lever are dispensed with and the tumbler lever is connected directly to
the link hereinbefore mentioned.
An independent barrel actuated in the ordinary manner. may be employed for
operating the measuring motion..

page_text: When the measuring motion is applied to a dobby having only one pattern
barrel the push catch for operating the latter is by a chain or strap connected to
a pulley in the dobby frame, and this pulley is also connected' by chain with a
tumbler lever the heavy end of which is operated by a finger on one of the jack
'levers.
On the pulley is a small catch and engaging with said catch is a tumbler catch
lever its heavy end being operated by the measuring motion.
When the measuring motion is operated the heavy end of the tumbler motion
is raised and the catch on the pulley is released by the catch lever and when the
jack lever moves upwards its finger operates the tumbler lever and by the chain
slightly turns the pulley which by chain also raises the push catch clear of the
ratchet wheel of the pattern barrel where it remains until the pulley is again
turned back to its normal position.
The improved method of connecting the baulk levers, baulks, and catches con-
sists in casting the baulk lever with two circular slots concentric to the shaft or
pin, the baulk levers and baulks and along the inner edge of each slot is cast
a projection. The baulk has two pins or studs cast on it which work in the
circular slots in the baulk lever, and the projections on the baulk lever work in
the slots in the baulk. The catches I make with a solid pin and boss, and a curved
neck on which is cast a tongue received in a recess or slot in the baulk the solid
boss also works in a recess in the baulk the pin working against the edges of
the recess. The solid boss may be cast as part of the baulk and also a recess
formed in such baulk and the catch formed with a double bearing surface a hook
like projection passing over and partly enclosing the solid boss, a second projection
working in a recess in the baulk, and a third projection working in another recess.
These methods of connecting the baulks, baulk levers and catches ensure a broad
working surface and the several parts are held steady and lineable one with
another.
When catches are employed for operating the ratchet wheels I employ a lever
free to move on its stud, and on one end of the lever is a projection on which
the catch for operating one of the pattern barrels rests. The lever is connected
by a link with the rocking lever, and on the axis or boss of the latter I fix a
finger which extends underneath the catch for operating the second pattern barrel.
When the lever is in operation the catches are alternately raised and lowered
with the aid of chains as ordinarily employed.
The improved apparatus for easing the rocking lever and its vertical rod when
held in the down position and for steadying same when in the raised position
and for removing the strain from the jack levers consists of a cranked lever
fixed on the dobby frame, one end of said lever being connected to the rocking
lever, and the other by belt or chain and spring to any fixed point. The spring
pulley on the cranked lever raises the rocking lever when the vertical lever of
the latter is released in the ordinary way.
D
1
improvements in the Shedding Mechanism of Looms for Weaving.
I, JOHN WARD, of Ingham Street Iron Works, Blackburn, in the County of
Lancaster, Dobby Maker, do hereby declare the nature of this invention and in

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement: —
This invention relates to improvements in the dobbies or shedding mechanism
of looms for weaving, the object being to control the healds by the dobby, so as
to ensure the change of pattern taking place at the correct time, and all the parts
acting in unison.
The invention consists:-
;
Firstly Of improvements in measuring motions to be applied to dobbies for
changing the pattern barrel at any predetermined time, or at every revolution of
the lattice.
Secondly: Of improvements in the method of connecting the baulks, baulk
levers and catches or draw hooks of dobbies.
Thirdly. Of improved apparatus for controlling the catches or pawls for operating
the ratchet wheels in dobbies.
Fourthly. To improved apparatus for holding the rocking lever steady in the
raised position.
Such being the nature and object of my said invention, the following is a com-
plete description of same, reference being had to the accompanying drawings,
in which:
Fig. 1 is a side elevation of the improved measuring motion.
Fig. 2 is a side elevation of the improved measuring motion to be applied to
a dobby having only one pattern barrel.
Fig. 3 is a side elevation of baulk lever, baulk and catch connected together
according to this invention.
Fig. 3 is an end view of part of Fig. 3.
Fig. 4 is a side elevation of the improved construction of baulk.
Fig. 5 is a sectional end elevation of Fig. 4.
Fig. 6 is a side elevation of the improved construction of baulk lover.
Fig. 7 is a side elevation of a modified construction of baulk lever, baulk, and
catch shewn connected together.
Figs. 8, 9, 10, 11, and 12 are oblique views of the baulk lever, baulk, catch,
and connections drawn separated.
Fig. 13 is a side elevation of apparatus for operating the ratchet wheels of the
pattern barrels.
Fig. 14 is a side elevation of the improved apparatus for easing the rocking
lever and its vertical rod.
According to this invention the improved measuring motion (see Fig. 1) con-
sists of a ratchet wheel 1 bolted to a disc 2 and carried on a cross shaft 3 of the
dobby. The ratchet wheel 1 is operated by a catch 4, carried on a rocking cranked
lever 5, connected by link 6 to one of the usual tumbler levers 7. In the periphery
of the disc 2 is a recess or notch, or recesses or notches 8, 8, and resting on said
disc 2 is the beak 9 of a lever 10, one end of which is free to turn on a fulcrum
stud fixed by bracket 12 to the dobby frame, and the other end is by link 13
and lever 14 connected to a hooked lever or catch 15, which is carried on the
or rocking lever 16 of the dobby. The disc 2 is adjustable by means of slots 17,
and set screws 18 on the ratchet wheel 1, and can be so set that when the ratchet
wheel 1 has advanced a pre-determined number of teeth; the notch 8 in the disc 2
comes under the beak 9 in the lever 10, and the latter is allowed to fall, and by
the cross head 19 of the link 13, raise the cranked end 20 of the lever 14, which
latter will raise the hooked lever or catch 15, so that at the next forward movement
of the rocking lever 16. the hooked lever 15 engages with and releases the ordinary
vertical catch lever 20 (by drawing it from its holding notch) of the rocking lever 22
carrying the barrels 23, 23, so that a change of barrel will take place at any pre-
determined time, the other barrel at the required time being again brought into
operation by the rocking lever 22 being operated in the ordinary manner by
apparatus similar to that shewn in Fig. 14.
It will be seen that as the tumbler lever 7, is operated as ordinary, it will by

page_text: its connections operate on the ratchet wheel 1 and move it a space of one tooth,
each time a peg comes under such lever 7.
When it is desired to change the pattern at every revolution of the lattice, the
ratchet wheel 1, disc 2, and lever 10 are dispensed with, and the tumbler lever 7
is connected directly to the oranked lever 14 hereinbofore mentioned, by means
of a spring or wire 24.
An independent barrel actuated in the ordinary manner may be employed for
operating the measuring motion.
When the measuring motion is applied to a dobby having only one pattern
barrel 23 (see Fig. 2) the push catch 26 for operating the latter is by a chain or
strap 26 connected to a pulley 27. in the dobby frame, and this pulley 27 is also
connected by chain 28 with one end of a tumbler lever 29, the heavy end of
which rests on and is operated by a finger 30 on one of the jack levers 31.
On the pulley 27 is a small catch 32, and engaging with said catch 32 is a
tumbler catch lever 33, its heavy end being operated by the cranked end 20 of
the lever 14, of the measuring motion shewn in Fig. 1.
When the measuring motion is operated as hereinbefore described, the heavy
end of the tumbler lever 33 is raised, and the catch 32 on the pulley 27 is released
by the weight of the catch lever 33, and when the jack lever 31 moves upwards,
its finger 30 operates and raises the heavy end of the tumbler lever 29, and by
the chain 28 slightly turns the pulley 27 which by chain 26 also raises the push
catch 25 clear of the ratchet wheel 36 of the pattern barrel 23, where it remains
until the pulley 27 is again turned back to its normal position, i.e. when the jack
lever 31 again moves down and allows the heavy end of the tumbler lever 29
to fall.
The improved method of connecting the baulk levers 1, baulks 2, and catches 3
(see Sheets 3 and 4) consista in casting the baulk lever.1 with two circular slots 4, 4
concentric to the shaft or pin 5 of the baulk levers 1 and baulks 2, and along the
inner edge of each slot 4 is cast a projection 6. The baulk 2 has two pins or
studs 7, 7 cast on it, which work in the ciroular alots 4, 4 in the baulk lever 1,
and the projections 6, 6 on the baulk lever 1 work in the slots 8, 8 in the baulk 2
(see Fig. 3).
The catches 3, I make with a solid pin 10 and boss 11, and a curved neck on
which is cast a tongue 12 received in a recess or slot 13 in the baulks 2, the solid
boss 11 also works in a recess in the baulk 2, the pin 10 working against the
edges 14 of the recess.
By making the hole 6 in the baulk 2 of the shape shewn, that is oblong, instead
of round as heretofore, the jack or baulk levers are not raised as soon as the catches
are engaged by their draw knives, and the healds and yarn remain slack for a
short period even when two similar picks are made in succession.
The solid boss 11 may be cast as part of the baulks 2, baulk levers 1, jacks 30°
or jack levers 31 (see Sheets 5 and 6,) and also a recess 5 formed in such baulks 2,
baulk levers 1, jacks 30° and jack levers 31 such parts being formed with double
bearing surfaces 16, 16 (see Fig. 8,) a hook like projection 17 passing over, and
partly enclosing the solid boss 11, a second projection 18 bearing against the
edges 16.of the recess in the baulk 2.
These methods of connecting the baulks 2, baulk levers 1, links 17%, jacks 30°
and jack levers 31 ensure a broad working surface, and the several parts are held
steady, and lineable one with another.
When catches 24,, 25 (sec. Fig. 13,) are employed for operating the ratchet
wheels 3, 4 of the pattern barrels, I employ a lever 5 free to move on its stud 6,
and on the heavy end of the lever 5 is a projection or pin 7 on which the catch 24
for operating one of the pattern barrels rests. The lever 5 is connected by a link
or chain 9 with the rocking lever 22, and near the axis or boss of the latter I
fix a finger 11 which extends underneath the catch 25 for operating the second t
pattern barrel. When the lever 22 is in operation the catches 24, 25 are alternately

page_text: raised and lowered so as to move clear of, or into contact with the ratchet wheels 3, 4
as the latter are lowered or raised in the ordinary manner.
The improved apparatus for easing the rocking lever 22 (see Fig. 14,) and
its vertical rod 11 when held in the down position, and for steadying same when
in the raised position, and for removing the strain from the jack levers 31 con-
sists of a cranked lever 12 fixed on the dobby frame, one end of said lever 12
being connected by link 13 to the rocking lever 22 and the other by belt or
chain 14 and spring 15 or by spring 15 only, the chain or belt 14 being dispensed
with to any fixed point 16. The spring 15 pulling on the cranked lever 12
raises the rocking lever 22 when the vertical lever 11 of the latter is released in
the ordinary way, and when so raised the spring maintains it in such position.
When lowering the end 4 of the lever 22 the latter is forced down, as ordinary
by lever 11 the lever 12 turns on its stud and the spring 15 is carried so as to
be nearer such stud and the end B, stud and point 16 are nearly lineable, and in
practice it is found that it requires little power to keep the spring 15 extended,
and the spring steadies the rocking lever 22 and prevents jars and strains. I
have found in practice that the mechanism described and illustrated by Fig. 1,
of the annexed drawings is unworkable and that the joint or manner of connecting
the baulks to the baulk levers as partially illustrated by Fig. 3 and partially
illustrated by Figs. 4, 5 and 6 is not new, and would have it understood that to
such I lay no claim.
Having now particularly described and ascertained the nature, and object of
the said invention, and in what manner the same is to be performed, I declare that
what I claim is:-
1. The improved measuring motion consisting of the ratchet wheel 1, disc 2,
lever 10, link 13, lever 14, tumbler catch lever 33, catch pulley 27 connected
with the tumbler 29, and catch 25, the finger 30 on the jack lever 31, all in com-
bination, operated, and operating in the manner herein described, and as illustrated
by Fig. 2 of the accompanying drawings.
2. The improved method of connecting the baulks, and catches as herein
described, and as illustrated by Figs. 3, 3, 4 and 5, of the accompanying drawings.
3. The improved method of connecting the baulks, baulk levers, catches, jacks,
links, and jack levers as herein described, and as illustrated by Figs. 7 to 12 in-
clusive of the annexed drawings.
4. The improved apparatus for controlling the push catches consisting of the
weighted lever 5 for supporting the catch 24, and which is connected with the
rocking lever 22 and on the latter is the finger 11 for supporting the catch 25,
all in combination, operated, and operating in the manner herein described, and
as illustrated by Fig. 13 of the accompanying drawings.
5. The cranked lever 12 connected by link 13 to the rocking lever 22, and
the strap and spring 15 (or spring 15 only) all in combination, as and for the
purpose herein described and as illustrated by Fig. 14 of the annexed drawings.
Dated this 14th day of December 1893.