Improved Means of or Apparatus for Producing Plain, or Partially Plain, Selvedges in Twilled Fabrics.
Year: 1890

page_text: CUMI LEIE DI PULICATION.
Improved Means of or Apparatus for Producing Plain, or Partially
Plain, Selvedges in Twilled Fabrics.
We, WILLIAM DENT of 68, Robinson Street, JAMES PICKLES, 25, Travers Street,
RICHARD WHITAKER, 42, Thorn Street, and THOMAS SCHOLFIELD, 14, Brennand
Street, Burnley, in the County of Lancaster, Overlookers, 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 is designed to dispense with the use of "boats" employed in weaving
plain selvelges in twilled fabrics. The "boat" is composed of a light swing frame
having two horizontal and parallel bars, one on each side. The selvedge threads are
threaded alternately under and over these bars, and through the healds just over
the eyes. In passing to the "boat" the selvedge threads do not pass through the
lease rods, but are conveyed direct from the back rest to the "boat." The selvedge
threads passing over the eyes of the ascending healds actuate the boat, and cause
the depression of those selvedge threads bearing against the eyes of the descending
healds.
Our invention relates more particularly to "three stave twills," and consists in the
employment of a staple or lever, which by gravity or by an elastic medium maintains
automatically an uniform tension on those selvedge threads passing through the healds
above the eyes.
In the accompanying drawings
Fig. 1 represents an elevation in section of a power loom with our improvements
applied.
A is the loom framing; B the sley-sword; C the box-end or sley; D the warp
beam; E and E¹ the lease rods. In this view, the staple F is represented as having
its prongs projecting through holes formed in the guide G, secured to the bracket H
by the bolt G. The staple F bears upon the selvedge threads F', passing through
the loops of their respective healds F2 and F3 immediately above the eyes, whilst the
other portion of the selvedge threads pass through the eyes of the heald F. Two
binder threads at the extreme edge of the warp are respectively passed through the eyes
of the healds F' and F³.
The disposition of the healds in the first instance is represented in Fig. 1, the
heald F' being raised, whilst the healds F3 and F' are lowered. The second move is
represented in Fig. 2, the heald F3 being raised whilst the healds F2 and F are
depressed. The third move of the twill is represented in Fig. 3, the two front healds F
and F are depressed, and the back heald F is raised.
In the change of the healds to the position shown in Fig. 3, the slack of the threads F1
is taken up by the gravitating staple F.
Fig. 4 is a view transverse to Fig. 1 of the staple F, guide G and bracket H.
Fig. 5 represents a modification of our invention, wherein we mount on a bracket J,
fixed to the loom side A, a gravitating lever 1, the projecting or cranked arm of which
bears upon the selvedge threads passing above the eyes of the healds F2 and F3
in a similar manner and for the like purpose as described in relation to Figs. 1, 2
and 3.
Having now particularly described and ascertained the nature of our said

page_text: invention and in what manner the same is to be performed, we declare that what
we claim is
The employment and use of the staple F, or lever I for producing plain, or partially
plain, selvedges in twilled fabrics, substantially as described and illustrated.
Dated this 13th day of September 1890.
THOS. RICHMOND,
Agent.