Ornamenting and Thickening Bands of Muslin Produced in Twist Lace Machines.
Year: 1891

page_text: Date of Application, 19th Feb., 1891-Accepted, 30th May, 1891
COMPLETE SPECIFICATION.
Ornamenting and Thickening Bands of Muslin Produced in Twist
Lace Machines.
I JOSEPH BOOTII of 300 Radford Road, New Basford Nottingham, Draughtsman
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 and by the
following statement :-
The object of this invention is to produce on the twist .lace machine more
advantageously than heretofore, thick ornamental bands commonly formed in
connection with other ornamental open work fabric. By this invention I form each
such thick ornamental band in the following manner:
I employ two bobbin threads, and a complement of warp threads..which may
vary in number according to their thickness and the guage of the machine; each
bobbin has two movements from the front of the machine to the back and from the
back to the front. The warp threads pass through bars which are connected with
a jacquard by which they are actuated; the movements of the warp threads are
from left to right and from right to left and take place when the bobbins have
reached their extremity either in the back or in the front of the machine.
Fig. 1 is a table shewing the movement of each warp thread; the bottom line of
Figures, B, shows each thread when in its normal position.
Fig. 2 shows the movement of each bar in the four motions required to complete
the cycle of operations for producing this band; a a are the bobbin threads.
Fig. 3. In this figure the bobbin threads a a are placed side by side in order to
show clearly the way the warp threads pass through them, but when wrought in the
fabric one lies over the other and they appear as one thread. In producing this
band I place the warp threads in two series; one operates from the left to the right
on successive motions-the other operates similarly from right to left of the two
bobbin threads on other successive motions. Starting with the second motion when
the bobbins pass from the back to the front of the machine, threads 3 & 9 of left
hand series are on the right hand side of the two bobbin threads, together with the
threads of the right hand series. At the 3rd motion when the bobbins return from
the front to the back, thread 6 is on the right hand side of the bobbins :-Bars 2, 5,
8, 11 have each two threads, those on the right hand side act upon the right hand
side bobbin thread and those upon the left hand side act upon the left hand side
bobbin thread, whilst the passes of the bobbin threads takes place at the second &
third motion; the left hand side threads of these bars are between the bobbin
threads, and the right hand threads of these bars are on the right side of the right
hand bobbin with the series belonging to that side & which are not then working.
At the 4th motion, when the bobbins are at the back of the machine, threads 4 & 10
are on the left hand side of the bobbin threads, & the right hand side threads of
bars 2, 5, 8 & 11 are between the bobbin threads where they remain during the
following motion; those on the left side are with the series belonging to that side
& are not working at those motions. At motion 5 threads 1 & 7 are on the left
hand side of the bobbin threads. Thus, in this way the work continues. The
tension of the warp threads, being superior to that of the bobbin threads, the latter
are so controlled as to form a woven band of wicker like appearance; the two
bobbins are thus made to traverse from edge to edge of the band; the movements
of bars 1, 3, 4, 6, 7, 9, 10 tend to bind the bobbins closely together, but the action
of threads 2, 5, 8, 11 intervening between the bobbins prevent such continuous
binding; so while giving an irregular oatmeal like appearance to the band also has
the effect of thickening it. The bars may be grouped differently & an independent

page_text: bar may be used for each of the threads carried by bars 2, 5, 8 & 11; but the
arrangement which I have described is the one I prefer.
Marginal threads are used for joining the bands with the other portion of the
fabric, or for joining two or more bands together.
Having now particularly described and ascertained the nature of my said
inventior, and in what manner the same is to be performed, I declare that what I
claim is :-
The production of thick ornamental bands made in twist lace machines in which
-two bobbin threads traverse from edge to edge with intervening threads which
alternate with the warp threads that make the muslin, substantially as described.
Fahman 14th 1901
JOSEPH BOOTH.