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 February 1879.
JAMES HOLLINGWORTH, Managing Director of the Firm of Hutchinson, Holling-
worth, and Company, Limited," of Dobcross, in the County of York, Machine
Makers. "IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention bas reference to looms having rising and falling shuttle boxes for
the purpose of weaving checks, stripes, or other fancy pattern in woollen or other
heavy goods, and consists :-
Firstly. To a new arrangement of parts for bringing the shuttle box tappets into
action with the bottom box lever so as to prevent the great vibration of that part
of a loom which is caused by the present arrangement.
The improvements consist in fixing a plate or disc on the crank shaft having a
series of external and internal tappets or cams formed on the faces of the disc, the
number of tappets being according to the number of shuttle boxes. A sliding.bar
is placed above this tappet-plate to which is attached a fork having two prongs or
legs on which may be placed anti-friction rollers. The tappet plate is placed
between the legs of the fork, and the friction rollers, which are placed one on each
side of the tappet-plate takes on to one or other of the tappets and the sliding bar
is caused to move either backward or forward as the tappet plate revolves. Attached
to the sliding bar is an arm or projection which is connected to the shuttle-box
tappets on the crank shaft, so that when the bar is slided in one direction or the
other the said tappets are also slided on the crank shaft and brought into position
for either raising or releasing the boxes. In order to keep the shuttle box tappets
perfectly steady and rigid on the crank shaft, teeth or grooves are formed on the
lower edge of the sliding bar into which the rim of the tappet plate or disc takes and
holds the sliding bar and shuttle box tappets steady and prevents vibration. When
the shuttle boxes are to be raised or lowered and the tappets slided on the crank shaft
the tappet plate is cut away on the periphery to allow it to clear the teeth or
grooves of the sliding bar, when the rim immediately again catches into the teeth of
said bar. When the shuttle boxes are required to be raised or lowered the sliding
bar is actuated by the pattern surface or peg lags of the jacquard, placing the
pulleys of the fork attached thereto into contact with the tappet plate so as to
slide the box and tappets into the position required. Instead of the sliding bars
lever or pendant arm may be employed.
D

page_text: 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 5
bottom box lever is brought under one or other of these tappets, and allows the said
bottom box lever to lower the shuttle boxes easily and without shock.