Year: 1898

page_text: I, JAMES LONGMORE, of 34, Leadenhall Street, in the City of London, Engineer,
do hereby declare the nature of this invention to be as follows:-
-
It is found desirable in the roving of rhea fibre for wet spinning to make the
same with a very low twist. The twist required is so small owing to the fact that
the fibre acquires such tenacity when wet that rove prepared dry in the ordinary
way with the usual twist cannot be satisfactorily drawn without breaking the
staple in the wet spinning frame, and if the twist is reduced to the necessary
amount in the dry rove, it will not hold together and cannot be worked.
It is therefore necessary to manufacture the rove itself wet, thus supplying the
tenacity lost by the necessary deficiency of twist. As the loose sliver delivered by
the rollers of the roving frame cannot itself be drawn through water without
displacing the fibres and constant formation of laps on drawing rollers, it is
necessary to interpose an apparatus between the delivery rollers and bobbins to
wet the rove, and at the same time keep the rove smooth and the rollers free from
laps and prevent consequent stopping of the frame.
This apparatus consists of a twisting nozzle through the centre of which the rove
passes on its way to the bobbin. This puts in a false twist which of course comes
out on issuing from the nozzle. A very large excess of twist is put in between
nozzle and rollers, where is also situated a small trough of water through which
the rove is drawn in the twisted state; the excess of twist overcomes the resistance
of the water to the twist passing up to the nip of the roller, thus the fibres are all
rolled tightly up immediately on leaving the nip of roller, and the formation
of laps is thus prevented and the rove also being tightly twisted, the fibres are not
displaced by the water and a less excess of water is also taken up than would
otherwise be the case. A straight line must be kept between nozzle and nip of
rollers.
Doted th 10th day of January 1808
BOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to the Roving of Rhea Fibre.
I, JAMES LONGMORE, of 34, Leadenhall Street, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
It is found desirable in the roving of rhea fibre for wet spinning to make the
I, JAMES LONGMORE, of 34, Leadenhall Street, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
It is found desirable in the roving of rhea fibre for wet svinning to make the

page_text: same with a very low twist. Owing to the fact that the fibres when wet adhere
very strongly to each other, rove prepared dry in the ordinary way with the usual
twist cannot be satisfactorily drawn in the wet spinning frame without breaking
the staple, and if the twist is reduced to the necessary amount in the dry rove it
will not hold together and cannot be worked.
It is therefore necessary to manufacture the rove itself wet, thus supplying the
tenacity lost by the necessary deficiency of twist. The loose sliver delivered by
the rollers of the roving frame cannot be drawn through water without displacing
the fibres, or without the constant formation of laps on the drawing rollers. It
is therefore necessary to interpose an apparatus between the delivery rollers and
bobbins to wet the rove and at the same time keep the rove smooth and the rollers
free from laps and prevent consequent stopping of the frame. This apparatus
consists of a twisting nozzle through the centre of which the rove passes on its way
to the bobbin. A false twist is thus put in which of course comes out when the
rove issues from the nozzle. A very large excess of twist is put in between the
nozzle and the rollers and the rove having this excessive twist passes through a
small trough of water placed between the nozzle and the rollers. The excess of
twist overcomes the tendency of the water to displace the fibres and less water is
taken up by them than would otherwise be the case. Further the fibres are all
rolled tightly up immediately on leaving the nip of the rollers and thus the
formation of laps upon the roller is prevented and a smooth rove obtained. An
approximately straight line or nearly so, must be kept between the nozzle and the
nip of the rollers, for if the rove had to pass over a pulley or guide between the
nip of the rollers and the twisting nozzles, the friction at that point might prevent
the twist extending right up to the nip. The slight friction caused by the rove
passing under a guide-bar in the water trough hereinafter described does not
materially affect the twist.
In the accompanying drawing which illustrate diagrammatically one con-
struction of apparatus according to this invention:
Figure 1 is a side elevation partly in section:
Figure 2 is a plan of a portion of the apparatus shown in Figure 1 drawn to a
larger scale and
Figure 3 is a longitudinal section through one of the twisting nozzles.
Like letters indicate like parts throughout the drawings.
A are drawing rollers which draw the loose sliver B through gills C adjacent
to the rollers. D are twisting nozzles mounted in line upon a frame D¹ and
geared together by gear wheels D2. The twisting nozzles 1) are all driven from
a wheel D³.
The twisting nozzles are preferably bored at an angle (Figure 3) so that a
straight passage is provided through which a hook or other instrument may be
inserted in order to draw in the end of the roving. A pot-eye D4 is provided at
one end of the twisting nozzle D approximately at right angles to the bore. The
roving passes through this " pot-eye" D and thus the twisting power of the
nozzle is much increased. The "pot-eye" I also serves to prevent the
continual friction of the roving cutting into the metal of the twisting nozzle.
To the frame 11 and between it and the drawing rollers A is a trough E pro-
vided with shallow grooves as at E and supplied with water from a pipe E².
Upon the other side of the frame I) is a bar F having grooves F in it which
are opposite to the twisting nozzles D.
The loose sliver passes between and is nipped by the drawing rollers A. It is
then given an excess of twist by the rotation of the twisting nozzles D the whole
length between the twisting nozzle and the nip of the roller being twisted. Before
entering the twisting nozzle D the highly twisted roving passes through the
trough E entering at one groove E¹ and leaving by another. The roving passes
under a rod E and is thereby depressed sufficiently to cause it to dip into the water
in the trough E. The water in this trough E is preferably allowed to gently
overflow into a second trough E. Thus, although the roving is wetted the time of

page_text: its contact with the water is reduced to a minimum which is advantageous. Upon
leaving the twisting nozzle 1) the roving-which then untwists-passes over the
grooves to the bobbin G and flyer G or to some similar arrangement where the
final low twist is given to it.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be obtained, I declare that what
I claim is:
1. The method of producing a low-twist wet roving of rhea or similar fibre by
setting up excess twist throughout a portion of roving extended between a twisting
device and the "nip' "of rollers A, applying liquid to that portion and then
permitting the untwisting of the excess twist substantially as described.
2. A smooth low-twist wet roving of rhea or similar fibre produced by the method
claimed in the preceding claiming clause.
3. In the manufacture of a low-twist wet roving of rhea or similar fibre the
combination with rollers A of a twisting nozzle and a trough E, all arranged to
permit the passage of the roving in an approximately straight line from the
rollers through the nozzle and operating substantially as and for the purpose
described.
4. In the manufacture of a roving of rhea or similar fibre a twisting nozzle
bored at an angle to the axis about which it rotates and provided with a "pot-eye"
substantially as and for the purpose described.
5. In the manufacture of a low-twist wet roving of rhea or similar fibre a
device such as the trough E and bar 13 whereby the roving is wetted substantially as
described.
7
JAMES
LONGMORE.
Boult & Wade,
Agents for the Applicant.