CERTAIN IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by Joseph John Harrison and Edward
Harrison at the Office of the Commissioners of Patents, with their
Petition, on the 19th January 1867.
We, JOSEPH JOHN HARRISON, of Manchester, in the County of Lancaster,
and EDWARD HARRISON, of the same Place, Engineers, do hereby declare the
nature of the said Invention for "CERTAIN IMPROVEMENTS IN LOOMS FOR
WEAVING," to be as follows: 1
Our Invention relates, first, to that portion of the loom termed the " warp
beam," and consists in a novel arrangement and application of a break to the
same, whereby any degree of tension can be given to the warp, and at the
same time effecting upon the same an even and regular tension during
the operation of weaving. This portion of our Invention may be thus
described, the ends of the "warp beam" are supported by brackets secured
to the loom frame; that portion of the bracket supporting the beam is con-
structed in the form of a trough or angular box, thus
the
back of this supporting box is supplied with a hinged clip or semicircular strip
of metal, which is caused to bear and press upon the beam, the amount of
pressure so exerted being regulated as follows:-A stud projecting from the
upper clip is connected by a helical spring and chain after passing round guide
pulleys with the boss of a ratchet wheel which is firmly secured in front of the
loom; the chains connecting the spring and break clip with the ratchet wheel
are secured one above and the other below the boss of such ratchet, the centre

page_text: pin or stud of which is supplied with a pinion gearing into a wheel which is
actuated by a key for winding up the ratchet, which is prevented going in a
reverse direction by means of a catch secured to the bracket supporting such
wheel, thus when the wheel is turned the chains connected to the springs and
break clips are caused to encircle the boss of the ratchet, which has the effect
of producing a greater tension upon the warp.
Secondly, our Invention relates to a novel arrangement and adaptation of
mechanism to the weft fork for actuating the same in place of the tappet and
lever now employed, and the improvement consists in supporting the hammer
upon a stud projecting at right angles from a short shaft supported in brackets
secured underneath the lathe; to the opposite end of this shaft from the finger
supporting the hammer a finger projects upwards, the extremity of which is
caused by the weight of the hammer to press against the loom swell, thus
when the loom is in action and the weft continuous the weft fork passes over
the catch of the hammer, but should the weft break the shuttle in the box
having depressed the swell will have raised the hammer, which will cause it
during the backward motion of the lathe to catch the weft fork, thereby
stopping the loom in the ordinary manner.
Thirdly, our Invention relates to a novel arrangement of rollers to be
employed for taking up the woven cloth, and consists in the application of two
rollers and a bar of metal; the cloth when passing from the breast beam is
caused to pass under a lower wooden roller, after which it passes behind a bar
of metal placed just above the under roller, from this bar the cloth passes on
to the cloth roller, which is caused as the cloth accumulates upon it to ascend
two inclined supporting slots formed in the loom framing.
And, lastly, we employ adjustable fronts to the boxes of looms termed
shuttle looms; we construct the adjustable front of angle plates, the base of
which is supplied with slots through which bolts are inserted for the purpose
of securing such fronts to the floor of the shuttle box.