Year: 1887

page_text: Date of Application, 1st Feb., 1887
Complete Left, 1st Nov., 1887
Complete Accepted, 2nd Dec., 1887
J, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention a communication to me from
abroad by Edouard Darchicourt, of 55-57 Rue du Vauxhall, St. Pierre les Calais,
France, Machinist, to be as follows:-
In most Levers lace machines, stump bars and "fine bars" are employed the stump
bars being pierced at every four gates with a rectangular hole having the width of a
gate, hence the motion of the thread is limited to the width of said hole, viz. :-one
gate, by the action given to it by the "fine bar," and one for all the stump bar
operated by the Jacquard.
The "fine bars" in these machines through which the warp threads pass before
passing through the stump bars are placed about six inches below the latter and are
operated by a small Jacquard without droppers which imparts to said bars by means
of cams a movement of 3ths of an inch to the right and the same distance to the left
at each motion, as required by the pattern and by which movement the thread is
caused to bear against one side or the other of the hole in the stump bar. This movement
of the "fine bars" whereby the whole of the warp threads are moved simultaneously
causes fine threads to often break and the object of this invention is to avoid this
objection by giving to the threads only just the necessary amount of motion, while
the threads being led direct to lever guides instead of through "fine bars" are not
subject to the friction occasioned by the latter. These lever guides also form a
substitute for the stump bars of bobbin net machines as well as for the fine bars
through which the warp threads are carried before passing to the stump bars in the
Levers lace machine. They also replace the pickers and Jacquard placed behind
and above some machines. In the example illustrated in the accompanying drawing
the warp thread can rise to four gates and if it is desired to rise to eight gates,
the number of lever guide bars is doubled and one half the number of lever guides
applied thereon, and so on proportionately.
In this manner the warp threads of the same division, work at will, from "stop"
to eight gates &c., that is to say, by taking eight threads of the same division, I may

page_text: select from among them those threads designated by the draught and move them one,
two, three, four, five, six, seven or eight gates &c. by means of droppers. In other
words the action on the warp is the same, as when what are termed independent bars
are employed.
Figure 1 shows a face view of a portion of the bars and lever guides of this
invention, with their operating mechanism.
Figure 2 shows the guides placed every sixteen gates apart in order to show the
passage of the threads.
Figure 3 shows the operating bars and lever guide bars in end view.
Figure 4 shows face and edge views of two adjacent lever guides.
A, B, are fixed bars provided with centres C upon which are placed the lever
guides G held in position upon bars A, B, by other bars D, E, and clamps F F placed
on either side of each breadth to be produced. The lever guides G, are of the form
shown in figure 4, the distance from centre C to the joint pin R being exactly twice
the distance between said centre and the thread eye. These thread guides are of two
shapes, the one G₁ being flat and the other G" offset or cranked as shown, and they
are arranged alternately in order to facilitate their working. M, N, are operating
bars, to which steel arms T are fixed at distances varying according to the breadth to
be manufactured and to the ends I of which, are jointed the lever guides G, G¹. The
bars M N are set in motion by either a single or double small spring Jacquard having
the necessary number of droppers for rising at least eight gates. These bars are
placed in different tiers according to the number of bars it is desired to introduce
into the machine.
In order that the lever guides may be all at the same height, the arms T are made
of different lengths according to the tier to which they belong so as to bring the
joints I all on the same level, and at twice the distance of the thread eyes from the
centre C so that the Jacquard will impart to the bars M N double the amount of
movement which they transmit to the threads in the thread eyes.
The bars M N are supported at each end of the work by movable comb blades,
which separate the tiers and divisions and they have also intermediate supports at the
divisions of the warp.
The drawing represents the arrangement for a 48 gauge 9 points, but the
proportions and dimensions before indicated would vary according to the piece to be
manufactured, the number of bars and gauge of the machine, without in any way
departing from the principle of the invention which is based on the theory of
proportional lines.
In this machine the warp threads pass in a straight line between each interval
separating the divisions of the working bars, and then between the guide lever bars
and through the guide eyes, instead of being as heretofore, passed through the slots in
the "fine bars" and then through the holes in the stump bars.
The machine may also be used for producing figured work.
The following aro the advantages of the invention:-1st Any work can be produced
from 0 to 8 or more gates or may stand still.
2nd. Stump bars and "fine bars" are dispensed with.
3rd. The finest silk and cotton threads may be used, as they are no longer subjected
to wear by the, in many cases useless, action of the "fine bars."
4th. A minimum number of 600 bars can be put in the machine, which number can
be still further augmented.
A. MELVILLE CLARK.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: Improvements in Lace Machines.
1, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention (a communication to me from
abroad by Edouard Darchicourt, of 55-57 Rue du Vauxhall, St. Pierre les Calais,
France, Machinist, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
In most Levers lace machines, stump bars and "fine bars" are employed, the
stump bars being pierced at every four gates with a rectangular hole having the
width of a gate, hence the motion of the thread is limited to the width of said hole,
viz. one gate by the action given to it by the "fine bar," and one gate for all the
stump bars operated by the Jacquard. The "fine bars" in these machines through
which the warp threads pass before passing through the stump bars are placed about
six inches below the latter and are operated by a small Jacquard without droppers
which imparts to said bars by means of cams a movement of three-fifths of an inch to
the right and the same distance to the left at each motion, as required by the pattern
and by which movement the thread is caused to bear against one side or the other of
the hole in the stump bar. This movement of the "fine bars" whereby the whole of
the warp threads are moved simultaneously often causes the breakage of fine threads;
and the object of this invention is to avoid this objection by giving to the threads
only just the necessary amount of motion, while the threads being led direct to lever
guides instead of through "fine bars" are not subject to the friction occasioned by
the latter. These lever guides also form a substitute for the stump bars of bobbin net
machines as well as for the fine bars through which the warp threads are carried
before passing to the stump bars in the Levers lace machine. They also replace the
pickers and Jacquard placed behind and above those machines in which both
the warp and weft threads are carried on bobbins mounted upon carriages (métiers-
bobinos.)
In the example illustrated in the accompanying drawing the warp thread can rise
to four gates, and if it is desired to rise to eight gates, the number of lever guide
bars is doubled and one half the number of lever guides applied thereon, and so on
proportionately. In this manner, the warp threads of the same division work at will
from "stop" to eight gates etc., that is to say, by taking eight threads of the same
division I may select from among them, those threads designated by the draught, and
move them one, two, three, four, five, six, seven, or eight gates etc., by means of
droppers. In other words the action on the warp is the same as when what are
termed independent bars are employed.
Figure 1 shews a face view of a portion of the bars and lever guides of this
invention, with their operating mechanism. Figure 2 shews the guides placed every
sixteen gates apart, in order to shew the passage of the threads. Figure 3 shows

page_text: the operating bars and lever guide bars in end view. Figure 4 shews face and edge
views of two adjacent lever guides.
A B are fixed bars provided with centres Cupon which are placed the lever
guides G held in position upon bars A B by other bars DE and clamps F F placed
on either side of each breadth to be produced. The lever guides G are of the form
shewn in figure 4, the distance from centre C to the joint pin R being exactly
twice the distance between said centre and the thread eye. These thread guides are
of two shapes, the one G¹ being flat and the other G off-set or cranked as shewn,
and they are arranged alternately in order to facilitate their working. MN are
operating bars to which steel arms T are fixed at distances varying according to the
breadth to be manufactured, and to the ends I of which, are jointed the lever
guides G G. The bars M N are set in motion by either a single or double small
spring Jacquard having the necessary number of droppers for rising at least eight
gates. These bars are placed in different tiers according to the number of bars it
is desired to introduce into the machine. In order that the lever guides may be
all at the same height, the arms T are made of different lengths according to the tier
to which they belong so as to bring the joints I all on the same level and at twice
the distance of the thread eyes from the centre C so that the Jacquard will impart to
the bars M N double the amount of movement which they transmit to the threads in
the thread eyes. The bars M N are supported at each end of the work by movable
comb blades which separate the tiers and divisions, and they have also intermediate
supports at the divisions of the warp.
The drawing represents the arrangement for a 48 gauge points; but the
proportions and dimensions before indicated would vary according to the piece to
be manufactured, the number of bars and gauge of the machine, without in any
way departing from the principle of the invention, which is based on the theory of
proportional lines.
In this machine, the warp threads pass in a straight line between each interval
separating the divisions of the working bars and then between the guide lever bars,
and through the guide eyes, instead of being as heretofore, passed through the slots
in the "fine bars" and then through the holes in the stump bars.
Figures 5 and 6 represent a slightly modified form of the lever guides G¹ G₁ before
described as being made alternately flat and off-set or cranked at the ends. In these
figuros, a is the lever guide b its centre of oscillation and c the joint by which it is
attached to the arm T of the operating bar shown in figures 1 and 2. d is the head
of the lever guide which in this case is twisted instead of being cranked as before,
so as to admit of their being brought closer together, and thus enable these lever
guide-bars to be applied to machines of the finest gauge. It also enables the
holes for the passage of the threads to be made much larger and ensures greater
precision in the position of the threads (which have but little tension) as they cannot
shift in the holes, and as the guides are no longer liable to cross each other, all risk of
cutting the thread is avoided. Guide levers of this modified form can be applied to
all kinds of lace machines from the largest to the smallest gauge, while they also
permit of working in all the gates of the machine with the greatest facility.
The machine may also be used for producing figured work.
are
The following are the advantages of the invention;-1st, Any work'can be produced
from 0 to 8 or more gates or may stand still.-2nd. Stump bars and "fine bars
dispensed with. 3rd. The finest silk and cotton threads may be used, as they are no
longer subjected to wear by the, in many cases useless, action of the "fine bars."-
4th. A minimum number of 600 bars can be put in the machine, which number can
be still further augmented.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is ;-
1st. The use, in the Levers and other lace machines (métiers-bobinos) of a system
of lever guide bars consisting in a combination of parts forming a substitute for
"stump bars" and "fiue bars," whereby the warp threads are rendered independent,

page_text: substantially as described and illustrated in figures 1, 2, 3, of the drawings for the
purpose specified.
2nd. In the herein described system of lever guide bars, making the guide eyes of
the lever guides alternately flat and off-set or cranked, substantially as described and
illustrated in figure 4 of the drawings for the purpose specified.
3rd. In the herein described system of lever guide bars, the employment of lever
guides having twisted guide eyes, as described and illustrated in figures 5 and 6 of
the drawings for the purpose specified.
A. MELVILLE CLARK.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.