IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by Thomas Pilkington Young and
James Thomasson at the Office of the, Commissioners of Patents,
with their Petition, on the 18th May 1870.
We, THOMAS PILKINGTON YOUNG, of the Firm of Thomas Pilkington
and Son, of Bury, in the County of Lancaster, and JAMES THOMASSON,
of Radcliffe, in the said County, Manager, do hereby declare the nature
of our said Invention for "IMPROVEMENTS IN LOOMS FOR WEAVING," to be as
follows:-
Our Invention relates to that description of loom employed for weaving
drills, "tabbys, or other fancy patterns, and is designed for the purpose
of simplifying the mechanism actuating the shedding, thereby giving
more ease, certainty, and uniformity to such motion than hitherto. The
Invention is more particularly applicable to the apparatus of such loom
in which the pattern to be woven is formed through the medium of
tappets previously arranged upon a barrel, chain, or other equivalent,
the disposition of which actuate rising and falling knives or levers that
transmit motion to indented vertical bars or hooks supported in guides
and connected with jacks giving motion to the healds.

page_text: '
The improvements consist, firstly, in constructing the hooks giving
motion to the healds with a single or double indentation in the form of a
dovetail groove, one on either side, back and front, and forming each
hook of separate pieces of vertical bars placed back to back, moving in
guides, and which are acted upon for shedding by tappets on a barrel,
chain, or other equivalent in the ordinary manner through the medium
of toggel jointed or compound levers connected by rods which receive
motion from a double-faced cam or eccentric that cause the levers to give
the knives acting upon the indented rods or hooks a rising and falling
motion that will with each vibration of such knives cause them to cross
or pass each other, in contradistinction to a retiring and advancing motion
for shedding, as hitherto employed. The hooks when in motion are
forced into position from their points of suspension with the jacks for
being acted upon by the vibrating knives through the combined action
of the tappets on one side and forked or bent pushers or guides actuated.
by helical springs on the other side. By this arrangement the shedding
apparatus is worked with greater ease in consequence of the simultaneous
upward and downward motion of the knives and hooks, which when
shedding act as a counterpoise that give in the cross shed thus effected a
steadier and more uniform motion than has hitherto been obtained.
Secondly. The improvements relate to all class of looms having what
is known as the "under pick," and are designed for the purpose of
modifying and checking the shuttle when being received in the box, and
also when "picking," which materially prevents the waste that now
takes place in the breaking of the weft, and the Invention consists in
projecting a lever or rod from the tongue or root of the picking stick
in a position terminating above the "picking tappet," the projecting
lever or rod at this point partaking of the circular formation the course
of the picking tappet makes when revolving; thus when the shuttle is
entering the box the picking tappet on its top centre at this time places
the "picker," through the medium of the projecting lever, in a position
to receive the shuttle, which as the tappet continues its revolution to
the opposite side of its centre effectually reduces and modifys the
concussion of the shuttle against the picker when entering the box.