IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by James Hollingworth at the Office
of the Commissioners of Patents on the 27th August 1879.
JAMES HOLLINGWORTH, of the Firm of Hutchinson, Hollingworth, and Company,
Limited, of Dobcross, in the County of York, Machine Makers. "IMPROVEMENTS
IN LOOMS FOR WEAVING."
This Invention has reference to looms having rising and falling shuttle-boxes, and
my improvements relate, firstly, to the use of apparatus for sliding the shuttle box
tappets upon the crank shaft, so as to bring them into position for acting upon
the bottom box lever, the present arrangement of mechanism for that purpose not
being sufficiently reliable. Upon the crank shaft of the loom I fix a plate or disc,
on each side of which are a series of cams or inclines at different distances from the
centre; the series on one side having the smallest incline nearest the centre, and
the largest near the periphery, the other series being reversed, that is to say, the
smallest incline is near the periphery, and the largest near the centre. These cams
or inclines act upon a forked rod which hangs nearly vertically over the plate, and
has a rising and falling motion imparted to it by the jacquard apparatus, the extent
of this motion being determined by the pattern surfaces. Besides its rising and
falling motion this forked rod has an oscillatory motion, which it derives from the
tappet or inclines acting on the end thereof. And the rod passing through a slot
in a sliding bar placed parallel with the crank shaft the oscillatory motion is con-
verted into a reciprocatory motion, which by means of a fork or clutch on the sliding
bar effects the lateral movement of the shuttle box tappets on the crank shaft.
The sliding bar has also notches formed in it to admit the edge of the tappet
plate, these notches corresponding with the shuttle box tappets, and the partition
between the notches are pointed, or wedge-shaped at each end, so that the edge of
the tappet plate, which is also wedge shaped, will enter more easily, and will serve
to adjust the sliding bar to its exact position. A portion of the periphery of the
tappet or incline plate is cut away to allow the sliding bar to move freely, and
when this has taken place the remaining portion of the periphery enters between
the notches and retains the bar in its proper position.
Secondly. The Invention relates to a method or arrangement of apparatus for
gradually lowering the shuttle boxes, and thus prevent the sudden drop, and wear
and tear of the parts, and the improvements consist in having a second series of
tappets or cams on the tappet plate, previously mentioned, and in so arranging them
that when the shuttle boxes are lowering, the bowl of an arm or lever connected to
the bottom box lever is brought under one or other of these tappets, and allows the

page_text: said bottom box lever to lower the shuttle boxes easily and without shock. Thirdly.
My Invention relates to another method of lowering the shuttle boxes gradually.
To the end framework I hinge a two armed lever, one arm of which points
downwards towards the bottom box-lever whilst the other arm is curved so as to rest
on the underside of the shuttle-box tappets. Upon the bottom box lever I form
an inclined ledge or shelf, and as the lever rises this ledge bears against the arm of
the lever first mentioned by which its rising motion is opposed, and can only take
place as fast as the shuttle box tappets acting on the other, arm of the lever depress
the same, and so move the first mentioned arm to the lowest end of the inclined
shelf.