IMPROVEMENTS IN FAST WARP LACE MACHINES
Year: 1884

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 FAST WARP LACE MACHINES," to be as
follows:-
Heretofore the perforated steel bars, and other guide bars employed in fast warp
lace machines have been placed above the needles. Our improvements consist in
placing the perforated steel bars, and other guide bars below the needles, and
employing an additional point bar, carrying leads of points either plain or grooved,
these points work between the perforated steel bars, the guide bar or bars, the
sinker hooks and the needles carried by a moveable needle bar, by such arrange-
ment the perforated steel bars, and other guide bars being at a greater distance
from the needles enables us to operate the additional point bar, so that the points
when at their lowest position enter the traversed fancy threads, then rise up and
hold such threads in position, until the sinker hooks pass under the points, and
receive the threads as the points are moved clear of them, previous to them being
lowered to enter a fresh selection of threads, which threads we are enabled to
traverse over a greater number of needles than heretofore, and can employ an
increased number of perforated steel bars, guide bars and stump bars.
Instead of the usual pillar guide bar, or bars, we may employ one or more
perforated steel bars.
The movements of the extra point bar we effect either by means of a crank, at
each end of a revolving shaft, and connecting links, or by suitable shaped cams,
truck bearing levers, and links, the cams being carried by a cam shaft.
The several movements of the other operating instruments we obtain in the
usual way, and the traverse of the several bars we effect by cam wheels, or one or
more jacquards.

page_text: COMPLETE SPECIFICATION,
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 FAST WARP LACE MACHINES and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
DESCRIPTION OF THE DRAWINGS.
Figure 1, is a sectional view showing the position of the various instruments,
just previous to commencing a course of work. Figures 2, 3 and 4 are also
sectional views showing various positions of the instruments while making a
course, each severally referred to hereafter.
:
Our improvements consist in placing perforated steel bars below the needles and
working them and in extra point bar in conjunction with other operating instru-
mments arranged as follows:-
A needle bar A, carrying leads of latch needles, which has to and fro horizontal
movements communicated to it, by eccentrics, or by cams in the usual way.
A pillar thread guide bar B supported by brackets B¹ carried by an oscillating
shaft B, also worked by eccentrics or by cams in the usual way, which com-
municate rising and falling movements to the guide bar, in addition to a longi-
tudinal motion, which may be obtained either by cam wheel, or by a jacquard at
either end of the machine. A point bar carrying leads of points C, the bar being
hinged to the inner ends of brackets C¹ carried by an oscillating shaft C. A hook
bar carrying leads of hooks D, the bar being hinged to the inner ends of brackets D¹
carried by an oscillating shaft D. The bars carrying the points C and hooks D
have each rising and falling movements communicated to them by their oscillating
shafts, which are operated in the usual way, and in addition thereto a rocking
movement is given them by means of arms secured to the bark in the usual way,
but not shown in the Drawings. And an extra point bar carrying leads of
points E this bar is supported by swinging arms E¹, the upper ends of which are
hinged to brackets carried by an oscillating shaft by which rising and falling
movements are communicated to the extra points E, a swinging movement being
also given to the points by links attached to the swinging arms, which with the
oscillating shaft are opérated by eccentrics or cams. Below the extra points we
place the required number of perforated steel bars F, which carry the fancy threads,
such bars are each traversed longitudinally by a jacquard or its equivalent at one
end of the machine. The steel bars are supported by brackets secured to the
framing of the machine Having described the movements of the various instru-
ments separately, we will now describe their movements in combination during the
working of a course.
At Figure 1 the various instruments are shown in the respective relative
positions they occupy at the commencement of a course. The loops of the previous
course having been taken over the heads of the needles by the hooks D, the extra

page_text: points E being at their lowest position or nearly so. Upon working the machine,
the needles A come forward, the hooks D, begin to descend, and the points C are
lowered through the pillar threads, and commence to take the work back while
the extra points E enter the fancy threads close to the steel bars F as shown at
Figure 2. The extra points then rise while in the threads, and reach their highest
point when the hooks are about at their lowest point, the hooks then enter the
fancy threads below the extra points, the extra points having taken the traversed
threads from the perforated steel bars above the noses of the hooks, so that the
fancy threads are perfectly straight and completely separated, for the passage of
the hooks through and between them. The points C in the meantime take the
work back over the latches of the needles, while the pillar thread guide bar B laps
its threads on the needles as shown at Figure 3. The hooks then come forward
through the fancy threads, the extra points meanwhile being withdrawn, and the
needle bar is drawn back as shown at Figure 4. As the hooks are taking the
traversed threads up to the needles, and at the same time bringing the work
forward, the extra points descend to the steel bars, which have in the meantime
been traversed ready for the next course, and the points C rise out of the needles
to allow the hooks to bring the last loops over the heads of the needles, the course
being finished the movements are repeated.
As the extra points E work outside the hooks D, they may be of considerable
depth, thickness, and length, thus ensuring great precision in taking the threads
from the steel bars, and also facilitating the taking of the threads from the extra
points by the hooks.
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
The employment in a warp lace machine of an extra point bar working in
conjunction with a hook bar substantially as described and illustrated in the
accompanying Drawings.
U
5
Witness:
H. W. GOUGH, C.E.,
Nottingham.
ALFRED DAWSON.
EDWIN SMITH,