IMPROVEMENTS IN JACQUARD MACHINES APPLICABLE FOR LOOMS FOR WEAVING
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by William Phillips Thompson at the
Office of the Commissioners of Patents on the 25th January 1881. A com-
munication from abroad from William Talbot and William Hepworth, both of
the City of Philadelphia, Pennsylvania.
WILLIAM PHILLIPS THOMPSON, of the Firm of Wm. P. Thompson and Co.,
Agents for Foreign Patent Solicitors, of 6, Lord Street, Liverpool, in the County
of Lancaster, 323, High Holborn, in the County of Middlesex, and Berridge
Street, Leicester, in the County of Leicester, Civil Engineer. "IMPROVEMENTS IN
JACQUARD MACHINES APPLICABLE FOR LOOMS FOR WEAVING." A communication
from abroad from William Talbot and William Hepworth, both of the City of
Philaldelphia, Pennsylvania.
This Invention relates to improvements in the well known jacquard machine
for weaving figured fabrics, which improvements adapt it for "seccelecting" the
colored "filling," or weft yarn used in weaving a web. This web is cut up into
strips, and these strips are used as "filling" or weft in weaving figured carpets,
rugs, and other articles that are known as "chenille" fabrics. The said Invention
consists, first, in the combination of a trap board of a jacquard machine divided
into sections, a series of cords and filling fingers, with two pattern mechanisms,
one to control the sections, and one to control the cords, as will be hereinafter
described; second, in the combination and arrangement of mechanism whereby the
movements of the card cylinder are controled by the cylinder or chain which
controls the movements of the trap-board sections.
The frame, card cylinder, needles, knotted cords, and weights, are constructed in
the manner usual in jacquard machines that are operated by knotted cords and
trap-boards. The improved trapboard is divided into sections. The ends of each
section are provided with a tennon that fits and slides in guides. The sections are
each provided with eyes to which are connected hooks; these hooks pass through
eyes in the needles. The needles pass at one end through the top of levers,
hereafter called the first levers, and on each of these needle ends passing through
the levers is cut a screw thread, and each needle is provided with two regulating
nuts. On the other end of each needle is placed a spiral spring. On the top of
the machine two rock shafts are mounted so as to operate in bearings, and on these

page_text: rock shafts are arms. To these arms lifting rods are connected, and from two of
these arms, hereafter called numbers one and two arms, are connecting rods
connecting to a crank on a shaft at the bottom of the machine. To the arm
number one is connected a pusher for moving the pattern cylinder. Connected to
one of the first levers by a connection is a lever hereafter called the second
lever. At the lower end of this second lever is a yoke; through this yoke passes
a connecting hook one end of which is connected to a lever at the bottom of the
machine, which lever is operated by an eccentric cam on the shaft at the bottom
of the machine, and through these devices the card cylinder is moved before the
change of one card for each complete revolution of the pattern chain on its
cylinder, as will be hereinafter described. The knotted cords are fastened to the
filling fingers (one cord from each section of the trap-board). These filling fingers
are constructed in a well known manner well shown and described in United
States Patent, Number 120,510, October 31st, 1871, and 159,653, February 9th,
1875. Hooks or filling carriers can also be used for inserting the filling in a
well known manner, specially shown and described in United States Patent
Number 13,382, August 7th, 1855, as well as in the above Patents Numbers 120,510
and 159,653. As these devices are old and well known no description of them is
needed here, but any one not used to this class of machinery can see them well.
set forth in the above mentioned Patent Specifications. It will be well here to
state that in practice it is proposed to divide the trap-board into forty four sections
and each section for ten cords (but these numbers may be increased or diminished
as may be desired) and for a trap board of forty four sections forty four levers and
a chain of forty four divisions will be required, and we propose to use in practice
the well known roller chain now used in harness motions on looms.
The operation of the improvement is as follows:-Motion is communicated to
the shaft at the bottom of the machine (which is so timed as to suit the filling
carriers of the loom). This shaft through the connection rods operates the lifting
rods. These in turn raise such hooks as may be pressed on by the pegs in the
pattern cylinder, and by this means the sections of the trap-board connected to
these hooks will be raised, and the trapboard in turn will raise such knotted cords
as shall not have been pushed off the trap; each of these cords will raise the
filling finger with which it is connected. As the arm number one descends, and
just as the section of the trap-board is lowered, the pusher will move the pattern
cylinder one division, and the peg in that division will push on the hook of another
section of the trap-board, and so on; each section of the trap-board will thus be
raised in succession. When the last division is to be raised, the cylinder will
present two pegs; one of these pegs will press in a lever which is connected to the
second lever, pressing it and a hook to the left, which when the hook is drawn
down by the eccentric cam on the shaft at the bottom of the machine, will catch
on the pin in one of the bell crank levers connected with slides that carry the card
cylinder and the "back-board" at the opposite end. The slides, cylinder, and
back-board will then be moved to the left, the card cylinder will be turned to the
extent of one card, and the back-board will be pressed against the ends of the
needles and press them all to the left; this will press all the knotted cords on
the trap-board. As the card cylinder is moved back to the right by the weights on
the bell crank levers, the card will push to the right all the needles except those
opposite a hole in the card; by these means all the knotted cords but one
of each section of the trap-board will be pushed off. As each section of the trap-
board is raised, the knotted cord left on that section will rise and with it the
filling finger to which it is connected. After each section of the trap-board has
been raised the card cylinder will be moved again and make such change of the
knotted cords as the design requires. It will be seen that one card does for all
the divisions of the trap board. In weaving “chenille" for some designs it may
be desirous to keep up each division of the trap to the extent of two or more
picks; in such cases the lifters are operated by a grooved cam. When constructing

page_text: the trap-board with a large number of divisions, to save space, it is proposed to
construct these divisions of metal and nest them. In working a division of the
trap constructed for ten cords, and having ten filling fingers, ten colors of yarn
may be used; but if twenty filling fingers be used and connected to each alternated
section of the trap, and two sections of the trap be raised at one time, twenty
colors may be used by arranging the cards so that only one section of the trap
will raise a cord.