Improvements in Dobbies of Looms for Weaving.
Year: 1898

page_text: Date of Application, 13th Apr.. 1898
Complete Specification Left, 13th Jan., 1899-Accepted, 25th Feb., 1899
PROVISIONAL SPECIFICATION.
Improvements in Dobbies of Looms for Weaving.
We, JAMES WARD, JOHN WARD the Younger, and JOSEPHI WARD, Machine
Makers, and JAMES ROBINSON, General Manager, all of Ingham Street Iron Works,
Blackburn, in the County of Lancaster, do hereby declare the nature of this
invention to be as follows:
-
This invention relates to improvements in the construction or manufacture of
cross border dobbies of looms for weaving, the object being to greatly reduce the
number of working parts constituting the cross border dobby and thus to simplify
same and lessen the cost of production. The measuring motion as heretofore
applied to such dobbies lacked the accuracy or precision and quickness requisite
for changing the barrels, or bringing one or other into operation at a given pick,
consequently it was necessary that the lattices should be "pegged" through the
entire pattern to be woven if accuracy was sought to be attained.
By the hereinafter described improvements the cross border motion is rendered
automatic and no measuring motion on loom as heretofore is required, and a quick
certain change of barrel is attained. The invention is also applicable to dobbies
having three or four pattern barrels.
According to this invention we employ duplicate tumbler levers or feelers and
pattern barrels as ordinary. The rocking lever which carries the lattice barrels
is provided at its end with a forked bracket at each end of which is an anti-friction
bowl. In the fork of the bracket and between the bowls is a tappet made, say G
to the round, viz. 3 lifts and 3 falls, or of other equal number so long as it is com-
posed of equal and alternate rising and falling parts. The tappet shaft extends
across the lobby and also carries a catch wheel, and at the front of the machine
a star wheel and spring and also a hand wheel. A second cross shaft carries a
small selecting barrel used solely for the purpose of controlling tappets, and
through the connections, the positions of the ordinary lattice barrels. The shaft
also carries a catch wheel, and at front of dobby the usual star wheel and spring.
To the last bell-crank or shedding jack we attach an adjustable rod controlling a
small bell-crank lever carried on a bracket, and a stud on such bell-crank lever
carries a pulling catch, and also behind it a pushing catch. A small bracket fixed
to the frame of the dobby serves as a guide for the pulling and pushing catches
and also serves as a hook for one end of a spring, the opposite end of which is
attached to a hook on the bell-crank lever. This spring tends to keep the lifting
jack or bell-crank in its normal position.
The action is as follows:-The lattices are pegged according to the cloth to be
woven and placed, say, the cross border lattice on the outside barrel and the ground
lattice on the inside barrel, The last row of holes in each set of lattices is reserved
for the insertion of the change pegs, and the last bell crank lever or shedding
jack is reserved for changing the position of the lattice barrels.
When a raised or full part of the tappet is up, then the inside barrel is raised to
its working position. When a low or down part of the tappet is up, then the out-

page_text: side barrel is raised to its working position. Lattices on supplementary barrel
are provided with pegs or are without pegs, and such lattices act upon the pulling
catch. Blank lattices allow the pulling catch to engage with and pull over one
tooth, the catch wheel on tappet shaft and thus change position of the lattice
barrels. Pegged lattices lift up the pulling catch and keep it out of gear
with catch wheel on tappet shaft, and so long as pegged lattices are so kept under
pulling catch, so long can we prevent change of barrels.
Change pegs on ordinary lattices cause last bell crank or shedding jack to lift,
and by its connections draw the pulling catch, with the result of a change of
barrels if blank lag on selecting barrel is in position and no change if a pegged
lag on selecting barrel is in position, viz. under the pulling catch.
Any number of repeats or parts of repeats can thus be put in off
either ordinary lattice barrel, and every change peg on such barrel,
as it leaves its feeler or tumbler, causes last bell-crank to fall and
thus push over the selecting barrel one lag, and thus determine accord-
ingly as the selecting lag is pegged or unpegged, whether the lattice barrels shall
change or not, when the next change peg on ordinary lattice barrel again comes
under its feeler or tumbler.
By putting a change peg on every lattice or lag on the barrels and at the same
time putting lattices without pegs on the selecting barrel, we can change the
barrels every two picks, that is, we can put in two picks off each shedding barrel
alternately, and equally well any multiple of two picks by suitable pegging.
When the arrangement is to work non-automatically, we dispense with the
selecting barrel and connections and use the tappet and its shaft, the latter being
provided with a hand wheel at the front of dobby by which the weaver is enabled
to change the barrels at will and by turning the hand wheel part of a revolution to
thereby change the position of the tappet and consequently the barrels.
pattern barrels are quite rigid whether the tappet is left with its full part up
or down, and this is a most important feature as any arrangement of locking
the rocking lever by means of snecks, springs or catches, adds materially to the
cost of the dobby, and also makes the cross border motion more complicated.
In a dobby in which three or four barrels are employed the lattice barrels are
governed by means of tappets acting, preferably, on anti-friction bowls secured
to swing levers provided with shafts, & carrying the lattice barrels in the usual
manner.
The
The selecting barrel is fixed and worked in a similar manner to the one herein-
before described and acts on pulling catches for the different barrels, such catches
being separate and distinct and free to be acted on by the pegs in the selecting
barrel. The catches are for turning the tappets and thus putting the barrels in
or out of gear, two tappets being turned at the same time, viz. the one with
its full part already up and the one which has to take its place. Rocking levers
are dispensed with, and each barrel has its own swing levers and tappet. The
barrels are not worked positively but are allowed, when the low parts of the tappets
come under their respective swing levers, to fall by means of gravity. Pressure
may however be applied by springs if so desired. The last bell-crank or lifting
jack of the dobby governs, by means of a small bell-crank, the pulling catches,
and also carries a pushing catch to turn the selecting barrel in a similar manner
to that herein before described. The feeler or tumbler levers are triplicated, one
tumbler lever being compounded onto another. By placing under the third feeler
or tumbler, another feeler or tumbler, and by adding another swing lever, barrel,
tappet, and pulling catch, this arrangement may be used for four barrels, and
by adding more tumblers compounded as the first ones and extra swing levers,
barrels, tappets, and pulling catches for even more than four barrels, if so desired.
BRIERLEY & HOWARD,
Penny Bank Chambers. Halifax, Agents for the Applicants.

page_text: Improvements in Dobbies of Looms for Weaving.
We, JAMES WARD, JOHN WARD the Younger, and JOSEPH WARD, Machine
Makers, and JAMES ROBINSON, General Manager, all of Ingham Street Iron Works,
Blackburn, in the County of Lancaster, 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:-
The
the
This invention relates to improvements in the construction or manufacture of
cross border dobbies of looms for weaving, the object being to greatly reduce the
number of working parts constituting the cross border motion and thus
to simplify the construction and lessen the cost of production.
measuring motion as heretofore applied to such dobbies, lacked
accuracy, precision, and quickness requisite for changing the barrels, or bringing
one or other into operation at a predetermined pick, consequently it was necessary
the lattices should be " pegged through the entire pattern to be woven if
accuracy was to be obtained.
"
By the hereinafter described improvements the cross border motion is rendered
automatic, and no measuring motion on the loom as heretofore is required, and a
quick certain change of barrels is attained. The invention is also applicable to
dobbies having three or four pattern barrels.
Such being the nature and object of our said invention, the following is a com-
plete description of same, reference being had to the accompanying drawings
in which only so much of a dobby is shewn as is necessary to illustrate the inven-
tion.
Fig. 1 shews in side elevation the cross border mechanism when two pattern
barrels are employed.
Fig. 2 is a side elevation of the tappet and forked bracket detached.
Fig. 3 is a side elevation shewing the arrangement as applied to a three
barreled dobby.
According to this invention and referring to Fig. 1 of the drawings, 1-1 are
duplicate tumbler levers or feelers acted upon by duplicate pattern barrels 2–2
as ordinary. The barrels 2-2 are carried on rocking levers 3, one at each side of
dobby and mounted on the shaft 1" which constitutes the fulcrum for such rocking
levers 3. To the inner end of one of the rocking levers 3 is attached a forked
bracket 4 at each end of which is an anti-friction bowl or runner 5 -5. In the
fork of the bracket 4 is a tappet made, say, six to the round, viz. three lifts and
three falls, or other number so long as it is composed of equal and alternate rising
and falling parts having a riser at one side opposed to a faller at the opposite
side, as say a ten to the round. The tappet shaft 7 extends across the dobby
and carries a catch wheel 8, and at the other side of the machine there is the usual
star wheel and spring, and also a hand wheel. A second cross shaft 9 carries a
small selecting and measuring barrel 10 between which and the dobby side is a
catch wheel and also a star wheel and spring at the opposite side of the dobby.
To the last shedding lever or jack 12 we attach an adjustable rod 13-14 con-
trolling a small bell-crank lever 15 carried on a bracket 16. A stud 17 on the
boll-crank lever 15 carries a pulling catch 18, and also behind it (and shewn in
dotted lines) a pushing catch 19.
A small bracket 20 fixed to the dobby side serves as a guide for the pulling
catch 18 and pushing catch 19, and also as a means of attachment for a hook for
one end of a spring 22, the opposite end of which is attached to a hook on bell-
crank lever 15. The spring 22 is for the purpose of keeping the lifting jack
or bell-crank lever 15 in its normal position.

page_text: The hook on the bracket 20 may be attached directly to the framing of the
dobby.
The action is as follows:-The lattices on the barrels 2-2 are pegged according
to the pattern of the cloth to be woven, and placed, say, the cross border lattices
on the outside barrel and the ground lattices on the inside barrel. The last or
end row of holes in each set or chain of lattices is reserved for the insertion of
the change pegs, and the last shedding jack which such change pegs govern is
reserved for changing the position of the lattice barrels.
When a raised or full part of the tappet 6 is up, then the inside barrel is raised
to its working position (as illustrated). When a low or down part of the tappet
is up, then the outside barrel is raised to its working position. It will therefore
be seen that the turning of the tappet 6 for one sixth of a revolution will alternately
put barrels 2-2 into position, one always coming out of action as the other is put
into working position.
The lattices on the supplementary selecting and measuring barrels (shewn in
dotted lines 21) are provided with pegs or are without pegs, and such lattices act
on the pulling catch 18. Blank lattices leave the pulling catch 18 in the position
as illustrated, viz.-in position to act upon the catch wheel 8, and through the
tappet and connections change the position of the barrels 2-2, viz. put the out-
side barrel into its operative position. Pegged lattices on the barrel 10 will lift
up tre pulling catch 18 clear of the catch wheel 8 on the tappet shaft, and so long
as pegged lattices are kept under the pulling catch 18 will change of barrels be
prevented.
Change pegs in the lattices on the barrels 2-2 will cause the last shedding lever
or jack 12 to lift, as is well known, and by its connections draw the pulling
catch 18 and so change the barrels, but if the lattice on the barrel 10 is pegged
no change takes place. The lattice now referred to is the one in its operative
position, viz. under the pulling catch 18, at the time such catch is actuated.
Any number of repeats or parts of repeats off either barrel 2-2 can thus be put
in according to the manner in which the change pegs are inserted and worked in
conjunction with the lattice on the barrel 10. As every change peg on either
barrel 2-2 leaves its feeler or tumbler, the last shedding jack 12 falls and causes
the push catch 19 (by its connection through 17 and 15 to the last jack 12) to
engage with the catch wheel behind the barrel 10, and push over such barrel and
its accompanying lattices 21 a distance of one lattice, and thus determine (accord-
ing as such lattice 21 is blank or pegged) whether or not the pulling catch 18
shall turn the tappet and change the barrels the next time a change peg causes
the last shedding lever 12 to lift.
When the arrangement is required to work non-automatically and the barrels
are to be changed by hand only, we dispense with the barrel 10 and its connections,
and use the tappet and its shaft, the latter being provided with a hand wheel by
which the weaver is enabled to change the barrels at will.
The pattern barrels 2-2 are held quite rigidly, whether the tappet 6 is left
with a full part up or down, and no further locking or snecking of the rocking
levers is required. It will be quite evident from the foregoing description that
instead of a negative tappet 6 made positive by the use of two anti-friction
bowls 5-5, the necessary swing of the rocking levers 3 and barrels 2-2 can be
readily obtained by using a positive tappet, in which latter case only one anti-.
friction bowl 5 would be needed.
Referring now to dobbies in which three pattern barrels are employed, and to
Fig. 3 of the annexed drawings. Feelers or tumblers 1-2 are used as ordinary,
and carried on a cross shaft is a third set of feelers 3, such feelers 3 acting on
the end of 2, as 2 acts on 1, viz. the feelers are triplicated and a peg coming
under either feeler 2 or 3 will act equally well on the feeler 1 which is the feeler
which controls the working of the shedding levers. Triplicate pattern
barrels 4-5-6 act on their respective sets of feelers 1, 2, 3, and such barrels
are carried on swing levers 4, 5, 6 carried on cross shafts 4, 5, 6. Similar

page_text: swing levers are provided at the opposite side of the machine for the purpose of
carrying the opposite ends of the barrels 4-5-6. Carried on a frame fixed to
the dobby, are tappets 7-8-9 constructed with alternate rising and falling
parts, say six to the round, and the swing levers 4", 5" and 6 carry anti-friction
bowls which are acted upon by their respective tappets. The raised portions of
the tappets when placed under their swing levers, raise up the corresponding
lattice barrel to its working position, say as-barrel 4, whilst the low parts of the
tappets allow the swing levers and barrels to fall to the inoperative position, say
as barrels 5 and 6.
The swing movement is "positive" only in the upward direction, and the
return of the barrels to their inoperative positions is by means of gravity, which
downward movement may be further assisted by means of springs.
Each tappet 7-8-9 is provided with a catch wheel. for turning purposes, and
star wheel and spring for steadying. The last shedding lever or jack 14 rocks
the bell-crank lever 13 carrying stud 12 on which are fulcrumed the three pulling
catches 7, 8 and 9, which pulling catches act upon their respective tappets
7-8-9 in a manner similar to the two barrel arrangement shewn at Fig. 1.
The stud 12 also carries a push catch 11 acting upon a catch wheel on the select-
ing and measuring barrel 10 which is used for selecting which hooks 7, 8, 9
shall act upon their respective tappets whenever a change of barrels takes place,
and the working of this three barrel arrangement is similar to the, working of
the two barrel arrangement already described.
Two of the tappets are usually turned at once, viz.-the one which has its full
part already up and the one which has to take its place.
Owing to the different lengths of hooks 7" 8" 9" when such hooks have to
be lifted off their respective catch wheels by pegged lattices on the barrel 10, we
use three different heights of pegs, the longest being for hook 7", and the shortest
for hook 9". An extra selecting barrel such as 10 may be placed between the
tappets 8-9 to act upon the hook 9, such barrel being driven from an endless
chain or gear.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
(1) The general construction, arrangement, and combination of mechanism con-
stituting the improved cross border motion as herein described and substantially
as illustrated by Figs. 1, 2, 3 of the annexed drawings.
(2) In a cross border dobby the use of triplicate tumbler or feeler levers in
combination with triplicate pattern barrels, as and for the purpose herein described
and substantially as illustrated by the annexed drawings. */
(3) In a cross border dobby the use of positive or negative tappet or tappets
for governing the ordinary lattice barrels as herein described and substantially
as illustated by the annexed drawings.
Dated this 12th day of January 1899.