IMPROVEMENTS IN TWIST LACE MACHINERY
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by Edwin Ellis at the Office of
the Commissioners of Patents, with his Petition, on the 6th June 1867.
I, EDWIN ELLIS, of Nottingham, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN TWIST LACE MACHINERY," to be as follows:-
The object of this Invention is more effectually and conveniently than
heretofore to act upon the fabric in a twist lace machine after it has been
produced and taken up by the ordinary points so as to drag or bias the fabric
correctly to the form or pattern required, such drag or bias of the fabric being
either to the right or to the left, or upwards or downwards, as may be required.
For this purpose in addition to the ordinary point bars I employ an extra
point bar carrying points at intervals, and at the places where they may be
necessary for the pattern which is being produced; this extra point bar receives
an up-and-down movement as required by means of the jacquard, which also
gives to it a horizontal motion to draw its points out of the work and to insert
them into it; the points are mounted on slides on the point bar, and the
jacquard again gives motion to these slides. In the working of the machine
the extra points which are at the front (by preference) enter into the work at
the line to which the back points take it, and in between these points, then
they rise so as to be clear of the ordinary points, and if a sideway bias is
required as soon as they are clear of the ordinary points they commence to
move sideways; they are carried to any required distance, and there retained
until they are next wanted for use, when the jacquard pulls them out of the
work, allows then to descend, and replaces them in the work in the positions

page_text: required at or about the level of the back points. When the work is required
to be raised by the extra points instead of or in addition to being biassed or
dragged sideways then the extra points are caused by the jacquard to rise
more rapidly than the work is wound up by the work beam; similarly when
the work is required to be depressed by the extra points, these are either not
raised at all by the jacquard, or they are caused by the jacquard to move
upwards less rapidly than the work is wound up by the work beam.
I arrange the parts of the machine in the following manner:-The extra
point bar is carried by arms which are able to slide up and down in guides,
and at the upper ends of these arms are set screws which rest on a horizontal
bar from which the point bar thus hangs. The horizontal bar is able to slide
a distance endways on the frame, and it is moved in one direction or the other
by the jacquard in the same way as the warp bars, and there are inclines on
the horizontal bar on which the points of the set screws bear, so that thus the
endway movement of the horizontal bar gives the required vertical movement
to the point bar, and more or less as may be required.
The motion to draw out and insert the points is obtained in the following
way: On the arms of the ordinary front point bar a horizontal rod is
mounted, which also like a warp bar has an endway motion communicated to
it by the jacquard except that one distance only is required; this rod has hooks
upon it which in one position catch the arms of the extra point bar, and in the
other leave them free. When the arms of the extra point bar are caught the
outward motion of the ordinary point bar is communicated to the extra bar,
and the extra points are drawn out of the work, their bar with its arms
rocking on the set screws on which they hang, and being drawn away from
stops against which they are at other times caused to bear by springs. The
slides on the extra point bar which carry the points are arranged like warp
bars; they are drawn up to fixed stops by springs, and they are drawn away
from the stops more or less by the jacquard at the times when the droppers
are allowed to fall into their boxes in the usual manner.