Improvements in Jacquards used in Lace Making and Weaving.
Year: 1893

page_text: Date of Application, 9th Mar., 1893
Complete Specification Left, 8th Dec., 1893-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Jacquards used in Lace Making and Weaving.
RICHARD BAKER 6 Upper Talbot Street Nottingham Lace Pattern Reader and
Puncher of Pattern Jacquard Cards do hereby declare the nature of this invention
to be as follows:-
This invention provides for improved shedding in weaving, lace making, and such
like is made operative in an ordinary jacquard on mountings, strings and parts
intercepting material forming the fabric.
In working out this invention I use specially shaped vertical wires, hooked at top
end in usual way.
I also use additional griff under ordinary needles, or cross wires,
Such griff
the lower part of said vertical wires so formed to rest on griff named.
being made to rise and fall, carry the vertical wires as required.
The purpose of this invention provides against irregularity and contraction in
the lengths of strings used in lace machines, such contraction being mainly the
result of varying temperature.
It also provides for improved shedding in loom weaving making the shuttle
openings in the warps the letter V shape.
It further provides and shortens the space distance traversed by the Jacquard
lifting hooks.
The strings in a lace machine as are the mountings in a loom, attached to the
lifting hooks of the jacquard and made operative by the pattern cards on material
being wrought.
In giving effect to these provisions I cause a recedeing motion to such of the
Jacquard lifting hooks as may not be engaged by the perforated part of the pattern
card, simultaneously with those which are lifted. Thus, those hooks disengaged
from the lifting griff by the unperforated part of the pattern card, being made to
fall, give easement to the contracted strings in the lace machine, and the shedding
opening, as described, in the warps of a loom, and by the simultaneous opposite
action of the engaged and disengaged hooks, the lifting space distance is reduced.
It will be noticed, I use in these improvements, an additional griff, under the
Jacquard cross needles, also specially shaped hooked lifting wires. The latter
resting on griff named, the said griff working with the upper lifting griff, but in
opposite directions, carry the vertical wires as may be required by the pattern
cards. Thus, those engaged by the perforated part, are lifted, and by the
unperforated part are made to recede, by the lowering of the under griff,
simultaneously with the rising of the upper lifting griff.
Dated this Ninth day of March 1893.
COMPLETE SPECIFICATION.
Improvements in Jacquards used in Lace Making and Weaving.
RICHARD BAKER 6 Upper Talbot Street Nottingham Curtain Lace Pattern
Reader and Card Puncher 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 :-
My invention relates to improvements in jacquards used with curtain lace
machines and with looms weaving fancy fabrics. In these jacquards as now

page_text: constructed there are a number of vertical needles which rest upon a fixed sley
when in their normal position, and to each needle there is attached a string which
is made to act upon a jack in a lace machine and upon a warp thread in a loom.
Each jacquard is fitted with a vertically moving griffe, and the needles are selected
by pattern cards which, acting through horizontal needles so move certain of the
vertical needles that the griffe misses them as it ascends, while certain other
vertical needles are raised by it. Now all these jacquards are defective in as much
as there are no means for compensating for alterations in the length of the
strings which length varies according to the temperature and moisture of the
atmosphere.
Now the object of my invention is the production of a jacquard in which the
defects existing in the present jacquards are overcome, and which when used with
a loom will give a quicker and clearer shed.
I accomplish the objects of my invention by using two griffes capable of vertical
movement but in opposite directions, the upper griffe working in exactly the same
way as the griffe used in the present jacquards. The lower griffe placed under the
horizontal needles forms a support for the vertical needles when in its highest
position and it is lowered simultaneously with the raising of the upper one.
By these means certain of the vertical needles as selected by the pattern cards
are raised by the upper griffe, and the jacks, in a lace machine attached to these
needles are drawn clear of the threads. In a loom the warp threads attached to
these needles are raised above the normal level of the warp.
The vertical needles not raised by the upper griffe descends with the lower one
and the jacks connected to them are allowed to fully enter the warp threads of the
lace machine, or in a loom, these needles allow the warp threads not raised to fall
below the normal level, thus producing a shed in which some of the warp threads
are raised above, and others lowered below the normal level of the warp.
In order that my invention may be fully understood I have attached hereto one
sheet of drawings upon which
Fig. 1 is a section of my improved jacquard showing one row of vertical
needles, one row of horizontal needles and both griffes (in section) when in their
normal position.
Fig. 2 is a section of my improved jacquard showing the same parts as in Fig. 1,
but after the griffes have been moved.
The upper griffe consists of a number of inclined plates a carried by a suitable
frame which is guided by the standards and actuated by a cam or other mechanism
from any convenient moving part of the machine. The horizontal needles e are
guided in sleys c', and are provided with bends on projections c² which are arranged
as shown with regard to the vertical needles . The needles e are selected, and the
selected needles moved horizontally by pattern cards and cylinders, these parts
being arranged and actuated as in the ordinary jacquard. The vertical needles b
are made with the usual top hook, but instead of resting on the lower sley il,
pass through slots in it, this sley being used as a guide only. The needles bare
also bent at 62 and 63 the two wires in the sley d preventing the needles twisting,
while the bend at 6 gives a spring to the needles which acting on the needles c
through the bends return them to their normal position without the use of
separate springs. The needles c are prevented from twisting by any suitable
means.
In addition to the ordinary griffe a my improved jacquard is provided with a
second griffe e arranged to work under the horizontal needles the plates of the
second griffe being mounted, guided and actuated in a similar manner and by
similar means to those used for the upper griffe, or the two griffes may be con-
nected by an arrangement of mechanism so designed that when motion is given
to one griffe it drives the other in the opposite direction. This second griffe
forms a support for the vertical needles which are bent at 63 so as to rest thereon.
When my improved jacquard is at work, the Jacquard cylinder with the pattern
card thereon moves towards the needles e when the parts of the jacquard are in

page_text: the positions shown in Fig. 1. If it is supposed the pattern is such that in the
particular row of needles shown the vertical needles 1. 2. 4. 7. and 8 are to be
raised then the needles 3. 5. 6 and 9 are pushed clear of the griffe a which rising,
lifts the needles 1. 2. 4. 7 and 8 with it. At the same time the needles 3. 5. 6 and 9
which are missed by the griffe a rest upon and move down with the lower griffe e,
the relative positions of the parts when the griffes are at the extremity of their
motions being shown in Fig. 2.
By the foregoing description it will be seen that if my improved jacquard is used
with a loom, that the warp threads attached to the needles 1. 2. 4. 7 and 8 will be
raised and the warp threads attached to the needles 3. 5. 6 and 9 lowered, a shed
being thus formed by dividing the threads equally on both sides of their normal
position. When my improved jacquard is used with a lace machine the jacks
attached to the needles which are raised will be drawn clear of the warp threads,
while the jacks attached to the needles which are lowered, are free to pass through
all the warp threads, and thus compensate for any withdrawal of the same due to
contraction of the strings or other causes.
I have described my invention as applied to a jacquard fitted with lifting griffes,
but it must be understood it is equally applicable to jacquard in which the griffes
are replaced by grids or other equivalents, the vertical wires being bent to suit
the equivalent used instead of the griffe. It should also be understood that the
purposes of the two griffes may be reversed, the selected needles being raised by
the lower griffe and the other needles lowered by the upper griffe.
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
claim is :-
1. In a jacquard used with lace curtain machines and looms, the use of a second
griffe working under the horizontal needles and arranged to support the vertical
needles when these are in their norinal position, and to which a vertical movement
is given for the purpose of allowing those needles which are not raised by the
ordinary griffe to fall below their normal position and which on its return move-
ment raises the needles to their normal level substantially as shown and described
in the accompanying drawings and Specifications.
2. The general arrangement and construction of a jacquard substantially as shown
and described in the accompanying drawings and Specification, and for the purpose
therein set forth.
Dated this 10th day of February 1997.
W. H. POTTER, M.I. Mech. E.,
Newcastle Chambers, Angel Row, Nottingham, Agent for the Applicant.