Improvements in Dobbies Employed in Looms for Weaving Squares, Borders, and the like.
Year: 1898

page_text: Date of Application, 23rd Sept., 1898
Complete Specification Left, 23rd June, 1899- -Accepted, 29th July, 1899
PROVISIONAL DEMITICATION.
Improvements in Dobbies Employed in Looms for Weaving Squares,
Borders, and the like.
I, ROBERT HENRY PLACE, of Lupton and Place, Limited, of Sandygate,
Burnley, in the County of Lancaster, Dobby Makers, do hereby declare the
nature of this invention to be as follows:
This invention relates to that class of dobby employed in looms having a
cross border motion for weaving squares, borders, and the like, as fully set forth
and described in the Specification forming part of prior Letters Patent granted
to me on the 4th day of September 1897 No. 20339, and known as the Keighley
dobby.
In this class of dobby two pattern cylinders are employed and the primary
object of this my invention is to simplify the parts, to reduce the number of
lags employed and to operate the cylinders automatically as and when required.
In carrying out my present invention, I employ a third or auxiliary pattern
cylinder caused to rotate by catch and pawl operated by the end baulk of the
dobby receiving its motion from a peg on one of the ordinary lattice sheets of
the cylinders. A peg in the auxiliary cylinder raises a horizontal lever provided
with a pin taking into a slot in a tumbling lever placing a catch into contact
with a latch or projection on the ordinary oscillating T lever, which has the
effect of reversing the position of the cylinders, that is, putting one cylinder
into contact with the series of levers for operating the baulks, and when the
cylinders have to be reversed again the auxiliary cylinder, which is without
peg permits the horizontal lever to drop or descend, causing the tumbler to be
operated in the opposite direction, thereby placing another latch into contact
with the catch on the T lever by which the lattice sheets are reversed and this
goes on in accordance with the arrangement of pegs in the ordinary cylinder.
In order to determine the extent of upward or downward movement of one or
both of the two cylinders, a loop is employed which receives a boss or other
part on one of the cylinders, and this determines the height and depth to which
the cylinders are raised and lowered, when being put into and out of contact
with the horizontally operated levers acting upon the baulks. The cylinders
carrying the lattice sheets or peg lags are fixed in their position when operated
by means of a spring acting on a projection on the lever carrying the said
pegging cylinder.
By means of my invention there is a saving of lags and more ornamental cloth
can be woven and the parts are greatly simplified and the dobbies are made
automatic.
1000

page_text: Improvements in Dobbies Employed in Looms for Weaving Squares,
Borders, and the like.
I, ROBERT HENRY PLACE, of Lupton and Place, Limited, of Sandygate,
Burnley, in the County of Lancaster, Dobby Makers, 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 that class of dobby, employed in looms, having a
cross border motion, for weaving squares, borders, and the like, as fully set forth
and described in the Specification forming part of prior Letters Patent granted
to me on the 4th day of September 1897 No. 20339, and known as the Keighley
dobby.
In this class of dobby two pattern cylinders are employed and the primary
object of this my invention is to simplify the parts, to reduce the number of
lags employed and to operate the cylinders automatically as and when required.
In carrying out my present invention I employ a third or auxiliary pattern
cylinder caused to rotate by catch and pawl operated by the end baulk of the
dobby receiving its motion from a peg on one of the ordinary lattices of
the cylinders. A peg in the auxiliary cylinder raises a horizontal lever provided
with a pin taking into a slot in a tumbling lever, placing a catch into contact
with a latch or projection on the ordinary oscillating T lever, which has the
effect of reversing the position of the cylinders, that is, putting one cylinder
into contact with the series of levers for operating the baulks, and when the
cylinders have to be reversed again a lag on the auxiliary cylinder, which is with-
out peg permits the horizontal lever to drop or descend, causing the tumbler to be
operated in the opposite direction, thereby placing another latch into contact
with the catch on the T lever by which the lattice sheets are reversed and this
goes on in accordance with the arrangement of pegs in the ordinary cylinder.
In order to determine the extent of upward or downward movement of one or
both of the two cylinders, a loop is employed which receives a boss or other
part on one of the cylinders, and this determines the height and depth to which
the cylinders are raised and lowered, when being put into and out of contact
with the horizontally operated levers acting upon the baulks. The cylinders
carrying the lattice sheets or peg lags are fixed in their position when operated
by means of a spring acting on a projection on the lever carrying the said
pegging cylinder.
By means of my invention there is a saving of lags and more ornamental cloth
can be woven and the parts are greatly simplified and the dobbies are made
automatic.
In the accompanying drawings, illustrating my invention, Fig. 1 is side
elevation of so much of a dobby as is essential to shew the application thereto
of my improvements and Fig. 2 is plan view of Fig. 1.
Referring to the drawings 1 and 2 are the pattern cylinders each carrying a
chain of lags 1 and 21 respectively. These pattern cylinders are carried by a
swing lever 3 fulcrummed on the shaft 4 as ordinarily. Only one of the pattern
barrels operates at one time, and hitherto the change from one barrel to the other
has been effected by hand.
The object of my present invention is to effect such change from one barrel
to the other, automatically, as and when called for, by the pattern being woven.
For this purpose I employ a third or auxiliary pattern barrel or cylinder 5
mounted in a convenient fixed position in the framework of the dobby. Around

page_text: this auxiliary pattern barrel 5 is adapted to work a chain of lags G of sufficient
width to carry one row of pegs 7 as shewn.
The auxiliary cylinder 5 is rotated when called for by a pawl 8 mounted at
the lower end of a lever 9 pivotted at 10 on the frame of the dobby, the pawl 8
being adapted to take into the teeth of a catch wheel 11, mounted
on the shaft of the cylinder 5. This lever 9 is formed with a projection
91 about midway of its length, which projection 91 is adapted to be
engaged, when the cylinder 5 is required to be rotated, by the movement of the
end baulk 12 which works the last or end jack of the dobby. The lever 9 and
pawl 8 traverse at each movement a distance enough to engage with a tooth of
the catch wheel and rotate the barrel 5 the extent of one lag in the chain 6. The
lever carries a finger or pin 92 upon which the pawl S rests, which ensures that
the pawl is always in position to engage the catch lever 11, a spring 19 being
employed to return the lever 9 to its normal position as shown. In a convenient
position above the auxiliary cylinder 5 is pivotted a horizontal lever 18 slotted
at one end as at 131. Into this slot enters and is adapted to work a pin 14
on one end of a tumbling lever 15, or instead of the lever 13 being slotted and
engaging a pin on the tumbling lever 15, said tumbling lever may be slotted
and the pin placed on the horizontal lever 13. The tumbling lever 15 carries
two catches 15 and 152 one or other of which is intended to be engaged by a
lug or projection 16 on the ordinary T lever 17 when it is required to reverse
the positions of the pattern cylinders 1 and 2. The tumbling lever 15 is carried
on a stud at the end of a lever 18 fast on the shaft 4 carrying the lever 3 and
pattern cylinders 1 and 2.
The action of these parts to automatically change the position of the pattern
barrels is as follows.
In the position shewn in the drawings the pegging barrel 1 is in gear, that is
to say, the pegs in the lags of the pattern chain 11 passing around same engage
in the rotation of the cylinder with their respective levers, to raise the healds
in connection therewith, the pegs on barrel 2 passing clear of their respective
complement of levers. At every revolution of the barrel 1 or oftener if desired,
the end baulk 12 is operated by the presence of a corresponding peg in the
chain 1. The baulk 12 in its movement engages the projection 9 on lever 9
and the pawl 8 carried by said lever is thereby brought into contact with the
presented tooth of the catch wheel 11 thus rotating the auxiliary barrel 5 the
distance of one lag whereby a peg 7 on the lag thus presented rides under the
spring 24 attached to the horizontal lever 13 and raises said lever which acting
on the pin 14 oscillates the tumbling lever 15 to place the catch 15 in such a
position that at the next vibration of the T lever 17 the projection 16 thereon
engages said catch 151 and oscillates the lever 18 to place the barrel 1 out of,
and barrel 2 into position for actuating their respective levers.
So long as a peg is presented by the rotation of the auxiliary cylinder 5 the
lever 13 is maintained in its raised position and the catch 152 is kept clear of the
projection 16 on the T lever, as said T lever vibrates backwards and forwards
in the usual manner. When, however, the peg in the ordinary cylinder 2 which
has been brought into action, again operates the end baulk of the dobby, and
consequently the auxiliary cylinder 5, and the lag 6 next presented by such
rotation is without peg, the horizontal lever 13 drops and in its descent oscillates
the tumbling lever 15 to place the catch 152 thereon in position to be engaged
by the projection 16 on the T lever at the next vibration thereof, thus reversing
the positions of the pattern cylinders and bringing them back to the positions
shewn on the drawings.
So long as the rotation of the auxiliary cylinder presents no peg underneath
the lever 13, the said lever remains in its lowered position and the projection 16
rides clear of the catch 151 as the T lever vibrates, thus the positions of the
cylinders remain unchanged.
If desired, instead of the auxiliary cylinder being rotated at each revolution

page_text: of the ordinary pattern cylinder which happens to be in gear, the said auxiliary
cylinder may be rotated two or more times during each revolution of the ordinary
chain as called for by the pattern being woven.
It will be understood from the foregoing that the end peg secured in one of
the lags of the ordinary cylinder which is in gear, operates the end baulk of the
dobby, and through lever 9 and pawl 8 rotates the auxiliary cylinder 5 a distance
equal to one lag; that on the positions of the ordinary cylinders being reversed
by the presence of a peg in the auxiliary cylinder, the ordinary cylinders remain
in their reversed positions so long as the rotation of the auxiliary cylinder
presents a pegged lag underneath the horizontal lever 13 to maintain said lever
in its raised position; and that, on the rotation of said auxiliary cylinder present-
ing a lag without peg under the horizontal lever 13 the ordinary cylinders are
again reversed and take up their original positions.
To ensure the cylinders remaining in their desired position after operation,
and to prevent oscillation of same, I employ a strong flat spring or springs 21
to act on a projection or projections 22 cast or otherwise formed on the lever 3
or on a boss on the shaft 23 carrying the pattern cylinder 2, the tension of the
spring against the said projection holding the lever 3 and parts firmly when at
rest. I preferably arrange one of said springs to act at each side of the dobby.
In order to regulate the extent of movement of the pattern cylinders at each
reversal of same, I attach to the frame of the dobby in a convenient position, a
lug or bracket 20 which engages a boss on the shaft, say, of cylinder 1, and
prevents excess of movement of the cylinders.
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 dobbies having a cross border motion, employed in looms for weaving
squares, borders, and the like, the combination with two patterns barrels or
cylinders mounted on a swing lever and adapted to come into into operation alter-
nately, as called for, of an auxiliary pattern barrel or cylinder mounted in fixed
position on the dobby, and means for operating said auxiliary cylinder sub-
tantially as set forth and for purposes described.
(2) In dolbies having a cross border motion, employed in looms for weaving
squares, borders, and the like, the combination with two pattern barrels or
cylinders mounted on a swing lever and adapted to come into operation alter-
nately, as called upon, of an auxiliary pattern barrel or cylinder mounted in
fixed position on the dobby, a lever having a projection adapted to be engaged
by the end baulk of the dobby when called for by one or other of the ordinary
pattern cylinders, and a pawl carried by said lever for operating the auxiliary
cylinder substantially as herein set forth and for purposes described.
(3) In dobbies having a cross border motion, employed in looms for weaving
squares, borders, and the like, the combination with two pattern barrels or
cylinders mounted on a swing lever and adapted to come into operation alter-
nately as called upon, of an auxiliary pattern barrel or cylinder mounted in fixed
position on the dobby, and means intermediate said auxiliary cylinder and the
swing lever to automatically operate said swing lever to reverse the positions of
the pattern cylinders mounted thereon through the presence or absence of a
peg in the auxiliary cylinder substantially as herein set forth and for purposes
described.
(4) In dobbies having a cross border motion employed in looms for weaving
squares, borders, and the like, the combination with two pattern barrels or
cylinders mounted on a swing lever and adapted to come into operation alter-
nately, as called upon, of an auxiliary pattern barrel or cylinder mounted in
fixed position on the dobby, the means described for actuating said auxiliary
cylinder, a lever whose position is determined by the presence or absence of a
peg in the lags of the auxiliary pattern chain and a tumbling lever having

page_text: double catches one or other of which is placed in position by the action of said
lever so as to be engaged by a projection on the T lever and to force said
tumbling lever and the arm carrying same in the direction of its vibration and
thereby reverse the position of the ordinary pattern cylinders in the manner
and for the purposes substantially as herein shewn and described.
(5) In dobbies having a cross border motion, employed in looms for weaving
squares, borders, and the like, the combination with two pattern barrels or
cylinders mounted on a swing lever and adapted to come into operation alter-
nately, as called upon, of means for regulating the extent of movement of the
swing lever and cylinders mounted thereon on reversal of their positions, and
for holding same rigid when at rest substantially as herein shewn and described.
Dated this 22nd day of June 1899.
TASKER & CROSSLEY,
Patent Agents, Halifax,
Agents for Applicant.