Improved Apparatus applicable to Twist Lace Machines.
Year: 1898

page_text: Date of Application, 27th Aug., 1898-Accepted, 22nd Oct., 1898
COMPLETE SPECIFICATION.
Improved Apparatus applicable to Twist Lace Machines.
I, JOSEPH TRUMAN, Ebury Road, Sherwood Rise, Nottingham, Lace Manufac-
turer, 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:-
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a vertical sectional view of the upper part of a twist lace
machine with my improvements applied thereto.
Figure 2 a front view of the same at the right end of the machine.
Figures 3 and 3* show a front side view of a spring dropper jacquard with
additional apparatus applied thereto.
Figure 4 a left end view of portion of the additional apparatus.
Figures 5, 6, 7 and 8 are enlarged right side views of the cams and trucks I
employ to communicate the requisite movements to the several parts of the
machine.
The several corresponding parts in each figure are lettered alike where
necessary.
Each twist lace machine provided with my improved apparatus consists of the
following parts.
Two end standards 1 connected at their upper ends by two shafts 2 on which
certain levers rock, at the back the standards form bearings for a rocking
shaft 2 the lower ends of the standards not shown in the drawings may be
bolted to the floor or to a floor plate.
The requisite rising and falling movements are given to the front point bar 3
and back point bar 4 by cams 5 and 6 operating truck bearing levers 7 and 8
shown at Figure 5. The top of the front point bar arm being hinged to the
front end of the lever 7, and the top of the back point bar arm being hinged to
the front end of the lever 8 but instead of the point bars falling to the tops of
the carriages 9 in the usual way they fall to just clear the tops of the thread
bars 10 as shown by the front point bar and enter between the traversed warp
or spool threads carried by the thread bars, each point bar being alternately
raised to just below the bottom of the facing bar 11, as they rise taking the
traversed warp or spool threads and carriage threads with them, the fabric as
made passing over the facing bar to the work roller 12. To insert the points
carried by the point bars in the threads while lifted to the face bar, and then
withdraw them clear of the threads, the front point bar arm is hinged to a knock
out arm 13 having its back end connected to the lower end of a two armed
lever 14 rocking upon the back shaft 2 the lever carrying a truck operated by
a cam 15 shown at Figure 6 the truck being held to the cam by a spring 16
attached to the truck lever and to an arm secured to the front shaft 2. The
back point har arm is hinged to a knock out arm 17 having its back end con-
nected to the lower end of a two armed lever 18 rocking upon the back shaft 2

page_text: and carrying a truck operated by a cam 19 shown at Figure 6 the truck being
held to the cam by a spring 20 attached to the truck lever and to an arm secured
to the front shaft 2.
To give room for the point bars to descend between the combs carried by the
comb bars 21 and 22 to place the points to just clear the tops of the thread bars.
Each comb bar is alternately rocked outwards into the position shown by the
bar 21 at Figure 1 by the following means, the ends of each bar carry brackets
from which axles project rocking in bearings formed in the lower cross bars
of the end standards, the outer end of each bracket on the front comb bar 21
is hinged to an arm 23 having its upper end hinged to a truck bearing lever 24
operated by a cam 25. The outer end of each bracket on the back comb bar 22
is hinged to an arm 26 having its upper end hinged to a truck bearing lever 27
operated by the cam 25. The levers 24 and 27 rock upon axles secured in the
end standards, portion of the levers 24 and 27 and the cam 25 are shown at
Figure 7. The in and out movements of the usual front and back landing bars 28
and catch bars 29 are effected by links 30 hinged to the bars 28, and levers 30
hinged to levers 31 secured to the rocking shaft 2", the rocking being effected
by the lower end of a lever 32 secured to the rocking shaft the lever being hinged
to the back end of an arm 33 slotted at its front end to slide to and fro on the
usual driving shaft 34 revolving in bearings secured to the front of the end
standards, the movements of the arm being effected by a cam 35 secured on the
Either end of
driving shaft working between two trucks carried by the arm 33.
the driving shaft is provided with the usual toothed bevel wheel gearing into
a like wheel on the lower end of a diagonal shaft carrying a bevel wheel at its
upper end gearing into a wheel secured on the usual cam shaft 36. The toothed
gearing is not shown in the drawings being of the usual construction.
The rising and falling of the catch bars to alternately release and engage with
the carriages is effected also in the usual way by inclines secured to the standards.
The traverse of the usual bars 10 carrying threads to produce finings or patterned
nets is effected in the usual way by a spring dropper jacquard shown at Figure 3.
In addition to which portion of the boxes of the jacquard have the ends of the
draw bits nearest to the machine secured to one end of bands or cords 37 which
pass over grooved supporting pulleys 38 the other ends of the bands are passed
round and secured to other grooved pulleys 39 shown in side view at Figure 3^,
of any required size placed between and each secured to a grooved pulley 40
twice its size.
The larger grooved pulleys each carry a band 40" connected to one end of a
steel bar 10 perforated in the usual way for the warp or spool threads.
The other ends of the steel bars are connected to coiled springs at the reverse
end of the twist lace machine in the usual way. The grooved supporting
pulleys 38 and the connected small and large grooved pulleys 39 and 40 revolve
on two shafts 41, 42 carried by bearings secured to the stays 43 connecting the
jacquard with the twist lace machine.
By such means the bands passed over the larger grooved pulleys effect a
traverse of the thread bars twice the length of the traverse given by the spring
droppers employed, thus any number of threads may be traversed the required
number of gates from one to fifteen inches or more in the direction of the length
of the machine with safety. The additional length of traverse being determined
by the diameter of the larger pulleys 40.
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. The employment in twist lace machines of point bars carrying points which
alternately fall to just above the usual thread bars 10 and then enter the threads
and rise to just below the bottom of the facing bar 11 substantially as herein-
before described for the purpose specified.

page_text: 2. The employment in spring dropper jacquards for traversing thread bars in
twist lace machines of bands or cords 37 having one end of each secured to the
ends of the draw bits of the jacquard boxes and passed over supporting pulleys 38
the other ends being passed round and secured to other grooved pulleys 39 each
secured to a larger grooved pulley 40 provided with a band 40" connected to it
the other end of the band being connected to one end of the usual perforated
steel bars 10 to effect an additionally length of traverse substantially as herein-
before described and illustrated in the drawings annexed.
Dated this Twenty-sixth day of August 1898.