Year: 1894

page_text: Date of Application, 6th Apr., 1894
Complete Specification Left. 7th Jan., 1895-Accepted, 23rd Mar., 1895
1, WILLIAM STRANG Junior, of 131 Greenhead Street, Glasgow, Power-loom
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object the weaving of leno harness goods with figures
apart from one another in the weft, without loss of yarn and time.
In carrying my invention into practice I use mounting similar to that which is
commonly used in weaving Madras or leno harness cloth, but in order to weave
that part of the cloth which has no figuring without loss of yarn or time 1 provide
an arrangement by which the loom works gauzing every shot or every second,
third, fourth, or other shot, as may be desired. To accomplish this I keep the
gauze reed falling and rising every shot whether figuring is required or not, and I
also keep the harness rising and falling every shot. The reed is always up when
the shuttle is traversing the lathe, and is only allowed to sink far enough to meet
the harness which is all raised half way. The cross necessary to form the gauge
can thus be obtained every shot. When figuring is required I raise and keep up
that part of the warp where no figure is desired and allow the warp to be used for
figuring to remain down while the figuring shuttle is thrown.
Dated this 5th day of April 1894.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
1, WILLIAM STRANG, Junior, of 131 Greenhead Street, Glasgow, Power-loom
Manufacturer, 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 has for its object the weaving of leno harness goods with figures
apart from one another in the weft without loss of yarn or time.
To
In carrying my invention into practice I use mounting similar to that which is
commonly used in weaving leno harness cloth, but in order to weave that part of
the cloth which has no figuring without loss of yarn or time I provide an
arrangement by which the loom works gauzing every shot, and, when figuring is
required, every second, third, fourth, or other shot, as may be desired.
accomplish this I keep the gauze reed falling and rising every shot whether
figuring is required or not, and I also keep the harness rising and falling every
shot. The reed is always up when the shuttle is traversing the lathe, and is only
allowed to sink far enough to meet the harness, which is all raised half way by the
holiboard. The cross necessary to form the gauze can thus be obtained every
shot. When figuring is required I raise and keep up that part of the warp where
no figure is desired, and allow the warp to be used for figuring to remain down
when the figuring shuttle is thrown.

page_text: In order that my invention may be properly understood and readily carried into
effect I have hereunto appended three explanatory sheets of drawings, in the
several figures of which corresponding parts are marked with the same letters of
reference.
Figure 1 is a front elevation of that portion of a power-loom which embodies my
improvements.
Figure 2 is a side elevation of the same.
Figure 2 is a detail view of the cam arrangement for actuating the gauze reed
and holiboard as hereinafter more fully described.
Figures 3 and 4 are diagrammatic views illustrating the two positions of the
gauze reed and holiboard relatively with the shifting reed required in weaving
lepo harness goods in accordance with and as constituting my invention.
Figure 5 is also a diagrammatic view drawn to an enlarged scale illustrating the
formation of the twist necessary to produce the gauze.
Figure 6 is a diagrammatic view illustrating the weaving of that part of the cloth
which has the figuring.
As illustrated in Figure 1, the arrangement by which the loom works gauzing
every shot consists in causing the gauze reed A and the holiboard B to approach
and recede from each other in the vertical plane that is to say they are capable
of an up and down motion only, as indicated by the arrows, U, while the shifting
reed C moves from side to side at relative periodic intervals also as indicated by
the arrows V.
For imparting the necessary motion to the said gauze reed A and holiboard B
a pair of cams D and E are employed. These cams D and E are mounted co-
axially on the shaft F, and are driven by any of the well known means employed
in giving motion to a power-loom. The motion communicated from the said cam D
to the said gauze reed A is obtained by the treadle G, connecting-rod H, bell-
crank lever I, rocking lever J, and quadrantal levers K and L. By an arrangement
of straps or chain M, or by any other suitable means the gauze reed is connected
to the operating mechanism last described. The gauze reed A. is connected to the
Inovable longitudinal bar A' by means of adjustable clamps or straps A². The
straps M aforesaid connect the bar A' to the bell-crank lever L, which again is
connected to the rocking lever J. By virtue of such arrangement the requisite
rise and fall of the gauze reed A is effected, which is due again to the motion of
the cam D. G' to M' indicate the corresponding lever and connecting arrangement
used between the cam E and the holiboard B.
The bell crank levers I I, quadrantal levers K, L, and K', L' are pivoted to the
fixed framework L of the loom.
The treadles G and G' in following the motion of the cams D and E, alternately
cause the levers H and H₁ to rise and fall. The rising and falling of these levers
causes the rocking levers J and J' to move backwards and for vards alternately,
and this motion imparts to the bell crank levers L L' and K, K' a motion corre-
sponding to the up and down motion of the said levers H II; that is to say when
the lever H is making its downward movement an upward movement will be
imparted to the gauze reed A. Simultaneously with the said downward movement
of the lever H, the lever I will be made to rise. The rising of the lever I will
cause the holiboard B to fall, so that the said holiboard B and gauze reed A
always approach and recede relatively from each other for purposes to be
described.
I shall now by the aid of Figures 3 and 4 proceed to describe the weaving of
that part of the cloth which has no figuring and which constitutes the groundwork.
The warp yarns are represented by the letters N and O. The warp yarn N passes
through the eye of the split reed a, while the harness warp O passes between the
split reed a and the long reed a', and is free to be moved up and down within the
reed due to the movement of the said holiboard B and the gauze reed A, as has
been previously referred to. By virtue of such a movement, together with the
lateral movement of the shifting reed C the yarn O is raised above the yarn N, co

page_text: seen in Figure 4, and is brought over and made to cross it, and is drawn down the
other side, thereby producing a twist, and forming an opening for the shuttle to
pass between. The weft yaru p, by the traverse of the shuttle, engages the loop
formed by this twist, and so by this means the gauze or ground of the leno harness
is formed as seen more particularly in Figure 5. The rising and falling of the
holiboard B in no way affects figure weaving and consequently communicates no
material motion to the jacquard, but has the effect of raising the harness warp O
so as to enable the gauze ground to be thus formed every shot. The shot thus
formed is beat up to the fell of the fabric by the lay w placed between the gauze
reed A and the shuttle (Figures 2 and 3) in the usual manner, but as this forms no
novel feature of my present invention it need not be herein further described.
I shall now describe the weaving of that part of the cloth which has figuring,
reference being had to Figure 6. The harness threads R through which are
passed the warp threads O are made double between the points S and T, and have
a rod passed transversely through each at the holiboard B. This rod rests on the
top of the holiboard B, so that when the holiboard is raised the whole of the
harness is raised and this raises the warp threads O. Simultaneous with the rising
of the boliboard B the Jacquard machine, which is attached to the harness
threads R, is free to act and when the holiboard B falls those harness threads which
have not been acted upon by the Jacquard machine fall along with it as shown in
dotted lines, but those which have been acted upon by the Jacquard machine are
raised up to the same level as the warp threads N, as shown in the said figure.
The figuring shuttle is then thrown, the result being that the figuring shuttle
passes along between the warp N and the harness warp thread O, where these have
been allowed to fall with the holiboard as shown in Figure 3, and in dotted lines
in Figure 6.
The Jacquard machine works every shot, and when the ground is being
formed a blank card is used so that all the harness threads fall along with the
holiboard.
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 :-
The raising and lowering of the warp threads acted upon by the harness, and
the lowering and raising of the gauze reed every shot, substantially in the manuer
and for the purposes hereinbefore described and illustrated on the accompanying
sheets of drawings.
Dated this 5th day of January 1895.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.