IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR WEAVING LENO AND GAUZE CURTAINS OR SIMILAR FABRICS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Peter Tarbet Macaulay at the Office of
the Commissioners of Patents on the 21st September 1878.
PETER TARBET MACAULAY, of Undercliffe, in the County of York, Designer.
"IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR WEAVING LENO AND
GAUZE CURTAINS OR SIMILAR FABRICS."
The object of my Invention is to regulate the warp ends that pass through the
dupe or doup in such a manner that when the said ends are operated upon, and
either rises or falls, the tension on the warp ends actuated will remain the same,
and thus preserve the strength of the warp.
I accomplish my object in the following manner:-The ends of the warp that
pass through the dupe or doup are passed either under or over a rod or rods that is
or are placed in any convenient position above or under the warp at the back part
of the loom, or in place of the rod or rods a cord or cords may be used, and when
the said warp ends are actuated and raised or lowered, the above-named rod or rods
is or are operated upon and move in the opposite direction, that is to say, if the
dupe or doup and warp ends are raised the rod or rods are lowered the same distance
the warp ends are raised, and at the same time thus keeping an uniform tension on
the warp ends. The before-named rod or rods is or are actuated by means of a
tappet that is in connection with the picking shaft or any other shaft of the loom
revolving at the proper rate or speed, this tappet is in connection with a lever or
levers, and when the lever or levers is or are actuated by the said tappet the before-
named rod or rods is or are raised or lowered as before described.
The same movements of the rod or cords may be obtained directly from the
jacquard.
The action of the before-named rod or rods may take place at every pick of the
loom, or the same may be held in one position for any number of picks according to
the character of the design, which is accomplished by the application of a catch and
spring, or catches and springs that are actuated by the jacquard, and are in con-
nection with the before-named lever or levers, so that when the jacquard cards are
regulated for the rod or rods to stop up, the same will cause the catch and spring to
Price 2d1

page_text: come in contact with the before-named lever or levers, and hold the same in position
until again acted upon by the jacquard.
By fixing the before-named rod or rods at the back of the loom directly above the
warp beam, I can arrange the before-mentioned tappet and lever or levers to give to
the said rod or rods an horizontal motion, which will be actuated upon at the same
time the dupe or doup and warp ends are raised or lowered as before described.
In order to form the dupe or doup without the use of the before-mentioned rods
or cords, I pass the warp ends through two rows of harness, the loops or mails in
the harness through which the warp passes are higher in one row than the other,
and when the card in the jacquard actuates and rises one row, the other row will
fall the same distance, and at the same time as the first-named row rises, and thus
preserve an uniform tension on the warp.
I can also obtain the same result without the use of the before-named rods or
cords, by the use of healds, reeds, hooks, needles, or loops attached to the jacquard,
in such a manner that one row of healds, reeds, hooks, needles, or loops through
which the warp ends pass is higher than the other row, and when the card in the
jacquard actuates and rises one row, the other row will fall as before described.
I can also attain my object by applying two or more warp beams at the back of
the loom, the additional warp beams contain the warp that passes through the dupe
or doup, and when the jacquard actuates the harness forming the dupe or doup the
additional beam or beams is or are caused to revolve a little on its or their axis, and
thus relieve the tension of the warp, and when the harness lowers the duped or
douped warp ends the additional warp beam or beams will revolve back, and thus
preserve an uniform tension of the warp as before described.