Year: 1889

page_text: I, ROBERT BRIGGS-BURY, of Bank House, Accrington, in the County of Lancaster,
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 :-
This invention relates chiefly to looms in which leno splits and other similar
fabrics having inner selvages and striped or fancy fabrics having cross threads are
woven, by means of doups.
Hitherto the doup or carrier for the crossing warp thread has been formed of a
spun or twisted material which owing to the friction of the stationary thread across
it wears out in a comparatively short time and it is to obviate this that my invention
is designed.
It consists essentially in constructing the heald with doups made of a fine metallic
chain, attached to and depending from the upper beam, to support the warps which
form the doup ends or cross threads by means of an eye at the end of each through
which these threads pass.
The invention will be fully described by reference to the annexed drawings which
show in outline sufficient of a loom, as arranged for weaving striped lenos to
illustrate my invention.
Fig. 1, is a transverse section of the front and back staves of healds with the front
stave lifted.
Fig. 2, front elevation of part of front stave of healds in same position as in
Fig. 1.
Fig. 3, elevation of part of back stave as seen from front of loom in same position
as in Fig. 1.
Fig. 4, plan of warp threads when staves are in position shown in Fig. 1.
Fig. 5, transverse section of the front and back staves with the back stave lifted
Fig. 6, front elevation of the front stave in same position as in Fig 5.
Fig. 7, elevation of part of back stave in same position as in Fig. 5.
Fig. 8, plan of warp threads when staves are in position shown in Fig. 5.

page_text: Fig. 9, front and side elevations enlarged showing the form of chain I prefer to
use for the deups.
In these A is the top heam and B the bottom beam of the heald stave. To the top
beam A are attached the doups C which are formed of a fino metallic chain preferably
constructed as shown in Fig. 9 though any other suitable form of chain may be
employed.
The doups depend from the top beam A hanging free at their bottom ends which
carry the crossing warp thread 1), they are preferably made as shown with an eye c
at either end, through the bottom one the doup end or crossing thread D passes
and by means of the top one the doup is attached to the top beam. By thus being
formed alike at both ends they may be reversed from time to time and so distribute
the wear over a greater area. E is the stationary warp thread or the one under
which the thread D is crossed. F are the ordinary heald bands with eyes through
which the warp threads pass.
By my invention the use of a half stave for controlling the lower ends of the
doups is dispensed with and the frequent repair or renewal of the doups consequent
upon being worn out is obviated.
In the drawings the doups are shown as arranged for the weaving of a striped
fabric, with four crossed threads in each stripe; for weaving splits two doups only
will be required placed together to form the double inner selvages; for weaving
other patterns as many chain doups may be used as can conveniently be arranged
across the stave without interfering with each other or the yarn.
When the front stave of the healds is raised as shown in Figs. 1 and 2 to form
the shed the crossing thread D is drawn up to the left side of the stationary thread E
crossing beneath it at the point d while the back stave remains down and the doup C,
depending from its top beam A falls loosely as shown. When the back stave is
raised the crossing thread D is raised at the right side of the stationary thread E and
the doup C of the front stave is drawn or curled round to the other side of stationary
thread (as shown in Figs. 5 and 6) in readiness to draw it back again to the other
side next time the front stave is raised. When both staves are down the chain doups
connected to each preferably hang loosely with a bend or curl at their lower end as
shown at the back stave in Fig. 1.
The doup chains C may be attached to the top beam A in any convenient
manner such as by a thread or string passing round the beam or by a pin through
the top eye stuck into the beam.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In the weaving of split cloths with inner selvages or of fancy cloths with stripes
or patterns formed of crossed threads a heald having doups made of flexible metallic
chains depending from the top beam of the stave substantially as described.
2. In cross weaving where doup healds are employed the use of a small flexible
metallic chain attached to the stave to guide or control the doup end of the yarns
substantially as and for the purpose described.
Dated this 10th day of Anzil 1000
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester,
Patent Agents.