Improvements in Means for Operating Jacks or Selectors used in Twist Lace, Warp, and other Weaving Machines.
Year: 1892

page_text: Date of Application, 30th June, 1892
Complete Specification Left, 30th Mar., 1893-Accepted, 6th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Means for Operating Jacks or Selectors used in
Twist Lace, Warp, and other Weaving Machines.
I, RICHARD BAKER of Upper Talbot Street in the Town and County of the
Town of Nottingham Gentleman do hereby declare the nature of this invention to
be as follows:-
In all cases where instruments known as jacks or selectors are used each selector
is attached to the jacquard by means of a cord, and the cords are so frequently
expanded or contracted in length by variations of temperature as to prove a source
of great inconvenience, loss of time and mistakes in the weaving of the fabric by
reason of the uncertain action of the selectors. The object of the present invention
is to prevent such irregularities or to so minimise them as to practically amount
to prevention. In carrying this invention into effect a lever is used in connection
with each jack or selector which levers are mounted on a rod or axis, are kept in
position by a sley and are attached to the jacquard at a point intermediate of their
axis and longer ends and to the selectors by strings attached to their shorter ends;
underneath the broad or longer ends of these levers is placed a bar which may be
called the locking-bar and to which a rocking motion is imparted. The jacks or
selectors are carried on a jack-bar which is operated in the usual manner well.
known to lacemakers. The locking-bar is connected to the jack-bar by levers and
link and is consequently operated by the jack bar.
In some cases it may be more convenient to reverse this process, and give the
original motion to the locking bar, which would by means of the levers and link
impart the necessary motion to the jack-bar. In the process of weaving hitherto
in operation some of the jacks or selectors are made to enter the threads, and those
which are not required to do so are "selected," that is, held back by the jacquard.
It is here that the inconveniences previously referred to take place, for if the
strings are shortened by a damp atmosphere the jacks or selectors attached to
those short strings fail to enter the threads, or on the other hand, if the atmospheric
conditions have caused some of the strings to lengthen, those jacks or selectors
which are attached to them are not kept back out of the threads and imperfections
are made in the fabric.
By the present invention these evils are obviated chiefly by the use of the locking-
bar. All those levers which are not selected by the jacquard fall into the locking-
bar; a backward motion is given to the locking-bar which motion carries the
non-selected levers in the bar in the same direction and keeps the jacks or selectors
out of the threads, whilst at the same time by means of the levers and link, the
jackbar is rocked forward, and the selectors which are not held back by the locking-
bar are carried forward into the threads. It will be seen from the foregoing
description that the only strings which can be operated upon by the weather to the
detriment of the machine are the short ones which connect the levers with the
jacks or selectors.
By the action of the levers and link the strain upon the jacks or selectors is
greatly reduced, as no strain is put upon them until half the motion of the jackbar
is completed.
A further advantage arising out of the present invention is that the strings
connecting the levers to the jacquard do not pass through a sley at a right angle as

page_text: in other cases, and the wear and tear of such strings by friction in the eley holes
is consequently avoided.
Dated June 30th 1892
RICHARD BAKER,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Means for Operating Jacks or Selectors used in
Twist Lace, Warp, and other Weaving Machines.
I, RICHARD BAKER, of 6, Upper Talbot Street, in the Town and County of
the Town of Nottingham, Gentleman, 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, reference being had to the accom-
panying drawings and to the figures and letters marked thereon.
In all cases where instruments known as jacks or selectors are used each selector
is attached to the jacquard by means of a cord, and the cords are so frequently
expanded or contracted in length by variations of temperature as to prove a source
of great inconvenience, loss of time and mistakes in the weaving of the fabric by
reason of the uncertain action of the selectors. The object of the present inven-
tion is to prevent such irregularities or to so minimise them as to practically
amount to prevention.
In the accompanying drawings Figure 1 is a vertical section and Figure 2 is a
plan of parts of a lace machine representing my invention applied thereto.
In carrying my invention into effect. I use a selecting lever A in connection with
each jack or selector E, which levers are mounted on a rod or axis B and are
provided with a slot A¹ to enable them to move to and fro on said axis B as herein-
after referred to.
The selecting levers A are kept truly in position and are separated from each
other by a sley C, and they are attached to the jacquard by strings D at a point
intermediate of their axis and longer ends and their shorter ends are attached. to the
jacks or selectors E by strings F.
Underneath the broad or longer ends of these selecting levers A is placed a
bar G which may be called the locking-bar and to which a rocking motion is
imparted.
The jacks or selectors E are carried on a jack bar E' which is operated in the
usual manner well known to lacemakers, such for instance as a cam such as that
shown at Figure 3 and suitable connections.
The locking bar G is connected to the jack bar E¹ by levers G¹ E' and an
intermediate connecting link H and is consequently operated by the jack-bar E.
In some cases it may be more convenient to reverse this process and give the
original motion to the locking-bar G which would by means of the before mentioned
levers G', E, and link H impart the necessary motion to the jack bar E.
For this purpose the lever Q may have connected thereto an arm. G' which may
be operated in any convenient manner as will be readily understood to give the
necessary motions thereto at the required times.
In the process of weaving hitherto in operation some of the jacks or selectors are
made to enter the threads and those which are not required to do so. are "selected,"
that is, held back by the jacquard. It is here that the inconveniences previously
referred to take place, for if the strings are shortened by a damp atmosphere the
jacks or selectors attached to those short strings fail to enter the threads, or in the
other hand if the atmospheric conditions have caused some of the strings to lengthen,
those jacks or selectors which are attached to them are not kept back out of the
threads and imperfections are consequently made in the fabric. By the present
invention. these evils are obviated, chiefly by the use of the locking-ban G. All

page_text: those selecting levers A which are not selected by the jacquard fall by their ends A*
into the locking-bar as shown at Figure. 1., a backward motion is given to the
locking-bar which motion carries the non-selected levers A in the bar in the same
direction and keeps the jacks or selectors E connected thereto, out of the threads,
whilst at the same time by means of the levers G¹, E' and link H the jack-bar E¹
is rocked forward, and the selectors connected to the selecting levers A which are
not carried back by the locking-bar G are carried forward into the threads. It
will be seen from the foregoing description that the only strings which can be
operated upon by the weather to the detriment of the machine and work are the
short ones which connect the levers A with the jacks or selectors E.
By the action of the levers G', E' and link H the strain upon the jacks or
selectors E is greatly reduced, as no strain is put upon them until half the motion
of the jack bar is completed.
A further advantage arising out of the present invention is that the strings D
connecting the selecting levers A to the jacquard in passing through the sley I do
not take a right angled course as in other cases and the wear and tear of such
strings by friction in the sley holes is consequently avoided.
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 I
claim is :-
1. In twist lace, warp and other weaving machines in which jacks or selectors of
the character herein referred to are employed the novel combination and arrange-
ment of parts for operating such jacks or selectors, substantially as herein shown
and described.
2. In twist lace, warp and other weaving machines in which jacks or selectors of
the character herein referred to are employed, the interposition of slotted selecting
levers between the jacquard strings and the jacks or selectors, such selecting levers
being mounted in a sley with capability of sliding on a rod or axis and being
connected by strings to the jacquard and by other strings to the jacks or selectors
and a locking bar acting to slide the non selected selecting levers on their rod or
axis to keep their connected jacks or selectors out of the threads substantially as
herein shown and described.
3. In twist lace, warp and other weaving machines in which jacks or selectors of
the character herein referred to are employed the combination with the jacquard
and with the jacks or selectors of slotted selecting levers mounted in a sley and on
a rod or axis passing through the sley, the connection of the longer arms of such
selecting levers to the jacquard by strings and of the shorter arms to the jacks or
selectors, by other strings, a locking bar to act upon and slide backwards the
non selected selecting levers and means for giving simultaneous motion in opposite
directions to the locking-bar and jack bar substantially as herein shown and
described and for the purpose stated.
Dated March 30th 1893.
Dated
March 30th 1893.
RICHARD BAKER,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.