IMPROVEMENTS IN WARP LACE MACHINES
Year: 1885

page_text: We, ALFRED DAWSON, of the Firm of Thomas Herbert and Company, Hounds
Gate in the town and county of the town of Nottingham, Lace Manufacturers and
EDWIN SMITH, in the employment of the same Firm do hereby declare the nature
of our invention for IMPROVEMENTS IN WARP LACE MACHINES to be as follows:-
In a warp lace machine constructed according to our improvements the fancy bars
are by preference, "but not necessarily," placed below the needle bar the threads
rising from the bars to the needles. The threads on leaving the fancy bars are
taken by points "carried by a point bar," which combing through the threads rises
towards the needles when the points have reached their highest point or thereabout;
sinker points "carried by another bar" enter, the threads, either from the same
side or from the opposite side, immediately below the first points, and rising while
in the threads, places the various traverses on the needles, the first points being
withdrawn, as the sinker points enter the threads. While the sinker points are
taking the traversed threads to the needles, the first points descend to take a fresh
selection of threads from the fancy bars for the next course.
By means of point bars working as above described, a larger number of fancy
bars may be employed, and a greater speed obtained in working the machine than
heretofore.

page_text: We ALFRED DAWSON, of the Firm of Thomas Herbert and Company, of Hounds
Gate in the town and county of the town of Nottingham, Lace Manufacturers, and
EDWIN SMITH, in the employment of the same Firm, do hereby declare the nature
of our invention for IMPROVEMENTS IN WARP LACE MACHINES," and in what manner
the same is to be performed, to be particularly described and ascertained in and by 5
the following statement:-
Figures 1 and 2 are sectional views showing the position of the operating
instruments in a warp lace machine, carrying latch needles with our improvement
applied thereto.
Figures 3 and 4 are sectional views showing the position of the operating
instruments with our improvement applied to warp lace machines carrying bearded
needles.
In carrying out our Improvements we employ three modifications of warp lace
machines. In the first modification shown at Figures 1. and 2, we arrange the
operating instruments as follows:-The latch needles A are cast in leads secured
to a needle bar, which has to and fro horizontal movements communicated to it in
the usual manner. The pillar threads are carried by the guides B of the pillar bar,
and are lapped on the needles in the usual way. In the drawings only one pillar
bar guide is shown, but two or more pillar bars in the same relative position may
be worked at the same time.
The steel bars C carrying the fancy threads slide upon brackets secured to the
framing of the machine, the bars being placed below the needles and are moved
longitudinally by a jacquard at one end of the machine. The sinker points D and
the bottom points E are each carried by a separate bar, each of which have to and
fro horizontal movements in addition to rising and falling movements, and work in
and out of the fancy threads in the manner hereafter described.
The fabric on leaving the needles is drawn across a facing bar F, and is taken up
by a work roller in the usual way.
The various instruments operate as follows:-At Figure 1 the needle bar is shown
at about its furthest backward point, the sinker points D having brought the last
traverse of fancy threads up to the facing bar, the bottom points E being at their
lowest position. On working the machine the needles A come forward through the
loops, the beads of the needles passing underneath the last traverse of the fancy
threads held by the sinker points D. At the same time, the bottom points E enter
the fancy threads close to the bars C and the sinker points D are withdrawn from
the threads, as soon as the needles have fairly taken the last traverse from them,
while the sinker points are clear of the fancy threads they descend, and the bottom
points rise while in the fancy threads, the needles in the meantime come forward
and receive the lap of the pillar threads laid on them by the guides B. The relative
position of the instruments at this point is shown at Figure 2. The bottom points
in the fancy threads; and the sinker points outside them having passed each other.

page_text: The sinker points then enter the fancy threads below the bottom points, and take
the traversed threads from them, the points E being withdrawn from the threads
as soon as the points D have taken the traversed threads. The points E then,
while outside the threads, begin to descend, as the sinker points in the threads
carry them towards the needles, and the bars C are traversed to place the fancy
threads in position for the next entry of the bottom points E. The needles in the
meantime being drawn back, the loops are. knocked over the heads of the needles
by the facing bar F, and the movements are repeated. In the second modification
of our improvements, the operating instruments are shown in the sectional view,
Figure 3 in their several relative positions. The bottom points E, the sinker
points D, pillar thread guides B, and perforated steel bars C working as described
in the first modification, but in place of latch needles, we employ bearded
needles A', the beards of which are pressed by a presser bar G secured to arms Q¹
carried by an oscillating shaft G3 which is operated so that the presser bar G is
made to press the beards of the needles, and is then withdrawn to make way for
the sinker points D.
In the third modification of our improvements, the operating instruments are
shown in the sectional view Figure 4, the various instruments working as previously
stated, but instead of the presser bar G, we employ guides H cast in leads and
secured to a bar H³ attached to arms which are carried by an oscillating shaft H².
The guides H have a wire H³ passed through them, which by the oscillation of the
shaft H2 is made to press the beards of the needles to allow the loops to slip over
them, and then retires out of the way of the sinker points D. We do not confine
ourselves to the precise shape of points shown in the Drawings, as divers shaped
points may be as conveniently used.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed; we declare that
what we claim is
First. The employment in a warp lace machine carrying latch needles, of two
point bars working in and out of the fancy threads, between the needles and the
fancy thread bars.
Second. The employment in a warp lace machine carrying bearded needles, and
a presser bar, of two point bars working in and out of the fancy threads, between.
the needles and the fancy thread bars.
Third. The employment in a warp lace machine carrying bearded needles, and a
wire presser, of two point bars working in and out of the fancy threads, between
the needles, and the fancy thread bars.
Dated this thirteenth day of June 1885.
ALFRED DAWSON.
EDWIN SMITH.
Witness,
H. W. GOUGH, C.E.,
Nottingham.