IMPROVEMENTS IN WARP LACE MACHINES
Year: 1885

page_text: We, ALFRED DAWSON, of the Firm of Thomas Herbert and Company, Lace
Manufacturers, Hounds Gate, and EDWIN SMITH, of 8 Park. Row, both in the
town and county of the town of Nottingham, do hereby declare the nature of our
invention for IMPROVEMENTS IN WARP LACE MACHINES, to be as follows:-
Our Invention relates to warp lace machines of the kind in which the traverses
of the fancy threads are laid on the needles by points or similar instruments. In
our improved machine, we prefer to employ latch needles for coarse work, and
bearded needles with a presser bar for work of a finer description, but not confining
ourselves to the use of either kind. The needles are secured by metal and screws
in the usual way, to a bar operated by eccentrics which give the bar a to and fro
motion, and also by means of links, a slight rising and falling motion. The points
we employ may be either plain thick points, or grooved points such as are
mentioned in our Provisional Specification of an application for a Patent dated
Dec 12th 1884 N° 16,322. These points comb through the fancy threads, taking
the traverses from the steel bars up to the needles, and when at their highest point
or thereabouts, the needles dip and enter the fancy threads under the points, so
that the points themselves do not enter between the needles. The guides of the
pillar bar or bars may also be worked so as not to enter between the needles, thus
allowing the needles and points to be of increased thickness and strength, and so
facilitating the working of fine guage instruments. It is obvious that an additional
point bar may also be employed in the manner described in our Specification of an
application for a Patent dated May 4th 1885, Nº 5462.
Dated thin donates o
1
2007

page_text: We, ALFRED DAWSON, of the Firm of Herbert and Company, Lace Manu-
facturers, Hounds Gate, and EDWIN SMITH of 8 Park Row, both in the town and
county of the town of Nottingham, do hereby declare the nature of our invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
Figure 1 shows a transverse sectional view drawn one half the full size of the
operating instruments in their several relative positions which we employ in our
improved machine.
Figures 2, 3, 4, 5 and 6 are separate views of certain instruments each severally
referred to hereafter.
Our invention relates to warp lace machines of the kind in which the traverses
of the fancy threads are laid on the needles by points or similar instruments the
parts of the machine not shown in the sectional view are of a construction well
known in the trade.
When making coarse work we employ a needle bar 1, carrying leads of latch
needles, the bar is securely connected with two or more eccentric 2, carried by a
revolving shaft 3. Underneath or behind the bar, and secured to it are two or
more axles 4, each carrying a link 5, the lower end of the links rock on other
axles 6, each secured to the framing of the machine. By such arrangement of
parts, when the shaft revolves the needle bar will receive not only a to and fro
horizontal motion, but also a slight rising and falling motion. The point bar 7,
carrying leads of points 8, has a rising and falling motion, in addition to a knocking
out motion, similar to that commonly employed in twist lace machines. Such
movements are obtained by two or more series of arms, links, and truck bearing
levers, operated by cams 9, on the shaft 3, and cams 10 carried by a revolving
shaft 15.
The perforated steel bars 11 carrying the fancy threads 12, are worked in the
ordinary manner and the pillar threads, carried by the bar 13, are lapped on the
needles in the usual way.
The fabric on leaving the needles is held in position and knocked over the heads
of the needles by the fixed facing bar 14, and is then wound up by a porcupine
roller, or by other approved means.
Instead of the facing bar 14, a trick bar may be employed for the same purpose,
one such bar carrying leads of trick plates 144, shown in section at Figure 2.
The revolving shaft 15 is connected by toothed gearing of the usual construction,
with the shaft 3, so that the latter will turn in the direction. indicated by the arrow,
the gearing is not shown in the Drawing.
An extra facing bar may also be employed if necessary to work up and down
immediately in front of the fancy threads 12, rising and falling at the same time
as the front bar 7, but working beneath it. Such extra facing bar would ensure
the fancy threads from being drawn away from the facing bar 14 by the points 8.
Upon the machine being put in motion, the various parts operate in the following
manner
The needles are drawn back under the facing or trick bar so as to knock the
loops well over, then by the movement of the eccentric 2, they are caused to sink
before coming forward. The points in the meantime enter the fancy threads close

page_text: to the steel bars, and keeping clear of the needles, take the traversed threads close
up to the facing or trick bar and hold them in that position while the needles come
forward under them. When the needles are fairly under the traversed threads, the
points are withdrawn, leaving the threads on the needles, and when the needle bar
is nearly at its most forward position it begins to rise, and at the completion of its
forward movement, it draws back with the needles close up to the facing bar or
trick bar.
The point bar in the meantime descends to take a fresh selection of threads
allowing the bar 13 to lap the pillar threads on the needles. Such combined
movements being repeated for each course.
The points 8 are of considerable thickness, and separate the fancy threads
sufficiently to give the needles a clear passage under them, a needle under each
point, the needles receiving the traversed threads exactly as they are taken from
the steel bars, thereby obtaining a gate for gate traverse without the employment
of double points or sinkers. An edge view of a lead of these points is shown the
full size at Figure 3, and in plan at Figure 4, and an edge view of a lead of points
of another shape is shown at Figure 5. These last points being slightly flattened
and cast in the leads diagonally allow a freer passage for the threads and still
separate them sufficiently for the free passage of the needles, or grooved points as
shown in plan at Figure 6 may be employed if necessary.
Should it be requisite to work the steel bars at an increased distance from the
needles an extra point bar may be employed to work below the point bar previously
described, and in the manner described and shown in the Specification of a former
patent granted to us for Improvements in warp lace machines dated May 4th 1885,
N° 5462.
For making fine work we employ bearded needles and a presser bar, instead of
latch needles. The needle bar may be worked in any position, either horizontal,
vertical, or diagonal, provided that the other working parts be transposed to
approximately similar relative positions.
In the sectional view Figure 1, only one pillar bar is shown, but two or more
may be conveniently employed to lap pillar threads on the needles.
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:—
1st The construction and employment in a warp lace machine carrying either
latch needles, or bearded needles with a presser bar, of a point bar working in
conjunction with a needle bar, substantially as and for the purposes described and
shown in the accompanying Drawings.
2nd The combined movements of the needle bar as obtained by the eccentrics 2
and links 5.
3rd The combination and arrangement of a point bar carrying thick points, as
shown at Figures 3 and 4 or 5 with a needle bar, a pillar bar or bars, fancy thread
steel bars and a facing bar 14, or truck bar 14 as shown at Figures 1 and 2,
working substantially as described and shown in the accompanying Drawings.
DATAN L.019 Twenty prst dev ot Inno 1988
WATAN T.019 Tawantw tret den at
Inno
Witness
H. W. GOUGH, C.E.,
Nottingham.
ALFRED DAWSON.
EDWIN SMITH.