Improvements in "Dobbies" or Modified Jacquards Employed in Weaving.
Year: 1888

page_text: Date of Application, 18th Aug., 1888
Complete Specification Left. 18th May, 1889-Accepted. 22nd June, 1889
PROVISIONAL SPECIFICATION.
Improvements in "Dobbies" or Modified Jacquards Employed in
Weaving.
:-
We, HENRY ROBINSON, of Shaw Bridge Mill, Clitheroe, Cotton spinner and
manufacturer, and JOSEPH MCGRAW, of 4 Bridge Bank, Walton-le-dale, Power
loom Overlooker, do hereby declare the nature of this invention to be as follows:-
or modified jacquards
The improvements relate to the construction of "dobbies
for weaving, and have for object the saving of cards or "lags" '-as the case may be-
when border patterns are being woven, as in hankerchiefs and other goods of a
similar form.
To accomplish this and to effect our improvements, we provide an extra cylinder
in the case of a
single lift dobby, or two extra cylinders in the case of a double lift
dobby.
These extra cylinders are suitably mounted underneath the ordinary ones, in such
manner as to be capable of operating the hooks of the dobby, and are employed to
actuate one portion of the pattern in process of weaving, while the ordinary or other
cylinder or cylinders actuate the other portion thereof. This is effected by one
cylinder being provided with cards or lags to actuate the pattern in the border and
being automatically stopped in its motion by the lifting of the paul or clauker out
of gear, and by a like reverse process putting the other cylinder in gear to make
the pattern of the centre, until such time as the border is again required. By
this means a short set of cards or lags is employed on the one cylinder to repeat
as long as required to form the central portions of the article being woven, and then
thrown out of gear, to make way for the employment of the other set to form the
border of such article, when the whole operation is repeated.
The taking in and out of gear of the pauls or claukers of the various ratchets giving
motion to the cylinders can be effected in various ways, as is well understood, by
means of gearing attached to the take-up motion in combination with levers inter-
vening between such motion and the pauls aforesaid, which levers are by preference
partly controlled by the cards or lags on the cylinder or cylinders, by means of the
ordinary hooks or one of them, and thus, being in connection with the paul or pauls,
are actuated to lift at the proper motions.
Variations in the detail and form of the cylinders employed, and the levers or
other controlling apparatus, may be made without departing from the peculiar
character of the invention, which mainly consists in the employment in dobbies or
modified jacquards for weaving, of two cylinders to one set of hooks, in such manner
that the cylinders act alternately under automatic control, so that the one operates
the centre of the pattern in the fabric by repetition, and the other the border
thereof.
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent.
COMPLETE SPECIFICATION.
Improvements in Dobbies or Modified Jacquards Employed in
Weaving.
We, HENRY ROBINSON, of Shaw Bridge Mill, Clitheroe, cotton spinner and
manufacturer, and JOSEPH MCGRAW, of 4 Bridge Bank, Walton-le-dale, Power
joom overlooker, do hereby declare the nature of our invention and in what manner
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page_text: "
the same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The improvements relate to the construction of "dobbies or modified jacquards
for weaving, and have for object the saving of cards or lags-as the case may be-
when 'border' patterns are being woven, as in hankerchief's and other goods of a
similar form.
To accomplish this and to effect our improvements, we provide an extra card or lag
cylinder in the case of a single lift dobby, or two extra cylinders in the case of a double
lift dobby.
These extra cylinders are suitably mounted underneath the ordinary ones in such
manner as to be capable of operating the hooks of the dobby, and are employed to
actuate one portion of the pattern in process of weaving, while the ordinary or other
cylinder or cylinders actuate the other portion thereof. This is effected by one
cylinder being provided with cards or lags to actuate the pattern in the border and
being automatically stopped in its motion by the lifting of the paul or clauker out
of gear, and by a like reverse process putting the other cylinder in gear to make the
pattern of the centre, until such time as the border is again required. By this
means, a short set of cards or lags is employed on the one cylinder to repeat as
long as required to form the central portions of the article being woven, and then
thrown out of gear, to make way for the employment of the other set to form the
border of such article, when the whole operation is repeated.
The taking in and out of gear of the pauls or claukers of the various ratchets
giving motion to the cylinders can be effected in various ways, as is well understood,
by means of gearing attached to the take-up motion in combination with levers inter-
vening between such motion and the pauls aforesaid, which levers are by preference
partly controlled by the cards or lags on the cylinder or cylinders, by means of the
ordinary hooks or one of them, and thus being in connection with the paul or pauls
are actuated to lift at the proper motions.
But that the improvements may be better understood, we will, by the aid of the
accompanying drawings proceed more fully to describe means employed by us in
carrying out the same.
DESCRIPTION OF DRAWINGS.
Fig. 1 shews an end view, of the arrangement of such portions of a double lift
dobby as will be requisite to describe the improvements; and Fig. 2 shews the
intermediate levers by preference employed, which arrangement of levers is for the
most part already known and in use for handkerchief motions, and which, per se,
form no part of these our present improvements; while Fig. 3 shews the actuating
arrangement of cams and levers geared with the take up motion of the room.
The same letters indicate corresponding parts wherever they occur.
a, a, are the two cylinders carrying the lattices b, b, which are prepared with one
portion of the pattern, either for the centre or top and bottom border, and c, c, are
the two other cylinders, which are prepared with the other portion of the pattern
forming the handkerchief or other bordered fabric to be woven. d, d, and d', d³,
are the paul levers carrying the pauls e, e, and e¹, e¹, which may be lifted out of
gear by the cords or wires f, f, by means of the levers 9, 9, which are in Fig. 1
shewn end on and to the ends of which levers the cords or wires f, f, are attached.
It will be seen that the cylinders being placed one above the other the lattices on
each are capable of actuating the same hook of the dobby for operating the heald
levers as at h, h, and h¹, h¹.
The gearing and means of driving these cylinders and the other portions of 'the
dobby may be of the ordinary and well understood kind, and are not shewn in the
drawings.
j, j, shews one form of the intermediate levers, and k, k, the other form for reverse
action. The object of these being for the more accurate actuation of the change

page_text: at the correct pick and the holding of the pauls in position until the time of change
takes place.
The lever arm at j₁ is attached to a hook of the dobby, and is lifted thereby as
often as requisite, and when the stop is held down it will be seen that the catch ³,
on the crutch leg prevents the fall of the end ¹ and as the end it is attached by
cord or wire to the opposite end of one of the levers 9, 9, the pauls e e are kept
out of gear, until the stop is raised to allow the fall of the lever end j'.
In the case of the lever k the reverse action takes place, as the stop is lifted by
a hook of the dobby, when the lever end k¹ is depressed and the raising of the end *
attached to the paul allows the paul to fall into gear, whereas the lowering of the
stop ", by pressing down the incline k³ reverses the action.
The stops and form the ends of links, of any suitable form, which are lifted
by means of the levers m, m³, and which levers are actuated by the cams n, n¹, geared
up to the take up motion of the loom.
The short lever or spring catch, o on the lever m², is pressed forward by the cam n¹
a few picks before the stop actuating the lever m² is raised, so that when the
lever m¹ is actuated the spring catch or lever o, flies back under the action of the
spring and thus rests on the surface of the cam n'.
The connecting cords or wires between the various levers and the pauls may have
spiral or other springs to enable the requisite give and take in operation, and both
pairs of cylinders may be stopped at once, causing plain cloth to be woven across the
piece during such interval of motion. By which means, with a suitable arrangement
of the pegs on the lattice, in conjunction with the cams and levers, either pair of
cylinders may be stopped or started at will, and thus two short sets of lattices caused
to weave a long pattern-by repetition-like a handkerchief, and having a top and
bottom border thereto.
It will be readily understood that, in lieu of a dobby fitted with lattices and pegs, a
dobby having perforated cylinders fitted with cards as also single lift dobbies may be
employed in similar manner, and that variations in form of the details may be made
without departing from the peculiar character of the invention.
.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
The combination of an extra cylinder in single lift, or two extra cylinders in double
lift dobbies, arranged one below the other, and capable of actuating the same hooks,
with the cams or tappets and levers geared with the take up motion, and combined
with any ordinary intermediate lever motion equivalent to those shewn in Fig. 2, for
the purpose and in manner substantially as shewn and described.
Dated this 17th day of May 1880
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent.