Improvements in or connected with Spinning and Doubling Frames.
Year: 1891

page_text: Date of Application, 17th Nov., 1891
Complete Specification Left, 17th Sept., 1892-Accepted, 12th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Spinning and Doubling Frames.
I, PHINEHAS PEARSON CRAVEN, of 17 Everton Road, Chorlton-on-Medlock,
Manchester, in the County of Lancaster, Gentleman, do hereby declare the nature
of the said invention to be as follows:-
:-
This invention relates to improvements more especially connected with ring
spinning and doubling frames, that is to say spinning or doubling frames in which
the winding of the yarn on to the bobbin or spool is effected by the friction of a
traveller carried round a ring by the tension or drag of the yarn; but parts
of such improvements are also applicable to other kinds of spinning and doubling
frames.
It is well known that in ring spinning frames, as at present constructed, the
tension or drag of the yarn, which in fact effects the winding-on thereof on to the bobbin
or spool, varies according as the yarn is being wound on to a small or large
diameter; and when the yarn is being wound on to the bobbin or spool in cop
form, this variation of tension or drag occurs during the winding-on of each conical
layer, so that for cach layer of yarn the tension or drag is greater while winding
on to the bare bobbin or spool than when winding on to the outer and larger
diameter of the conical layer of yarn. It is found in practice that in order to
avoid, on the one hand, too much tension or drag when winding on the smaller
diameter, and too little when winding on the larger diameter, the diameter of the
empty bobbin or spool must not be less than a certain dimension when it is required
that the diameter of the full bobbin or spool shall have a certain other dimension,
because, if the empty bobbin or spool be made of less diameter, and the tension or
drag is sufficient to wind on tightly enough at the larger diameter, it is increased to
such an extent that the yarn breaks when winding on at the smaller diameter. For
this reason it is not, so far as I am aware, practicable to spin in ring frames, as at
present constructed, on the bare spindles without limiting the external diameter of
the cops to a size smaller than is desirable.
Now the object of one part of this invention is to obviate the above mentioned
defects, and for that purpose I cause the traveller, or at least that point of the
traveller through which the thread of yarn passes or round which such thread is
wound on its way from the drawing rollers to the bobbin, spool or spindle, to be
moved inwards towards the centre of the spindle, or outwards away therefrom,
more or less, in proportion as the diameter that the yarn is being wound on to varies,
so that the tension or drag of the yarn may remain practically constant whether the
yarn is being wound on to a small or large diameter. That is to say that as the
diameter that the yarn is being wound on to decreases, the traveller, or the point
thereof through which the thread passes or round which such thread is wound,
is, moved inwards towards the centre of the spindle, and as that diameter increases,
the traveller, or such point thereof as aforesaid, is moved outwards away from
the centre of the spindle. By these means the angle at which the yarn draws the,
traveller with reference to the circumference of the ring, remains practically constant"
within certain limits whatever be the diameter on which the yarn is being wound..
The traveller, or the point thereof through which the yarn is passed or round
which such yarn is wound on its way to the spool or spindle, may be moved towards
and away from the centre of the spindle, as the diameter of the cop varies, by
means of arrangements of the following character:-
The traveller is composed of a piece of wire, - sheet metal, or other suitable
material, the upper end of which is provided with a bearing or other appliance
adapted to take over the upper part of the spinning spindle, or in some cases over

page_text: the upper part of the dead spindle or stud on which the spinning spindle or tube
revolves, in such manner that the said traveller is free to rotate round the said
spinning or dead spindle as the case may be, and to rise and fall thereon to the
extent necessary for the formation of the conical layers of yarn forming what is
called the chase of the cop. The traveller is carried by a bar, or by bearing
plates or other suitable devices in such manner that while being free to rotate
round the spindle as aforesaid, it can be raised and lowered to the required extent
by the said bar or plates. Near its lower end the traveller is provided with an eye
or loop through which the yarn is passed, or with a suitable arm or arms round
which the yarn is passed or wound on its way from the drawing rollers to the
bobbin, spool or cop. The lower end of the traveller passes into the interior of a
truncated conical ring which is supported in a position concentric with the spindle.
As the lower end of the traveller is carried round by the tension or drag of the
yarn in the aforesaid conical ring, the centrifugal force generated in the traveller
forces the said lower end thereof outwards against the internal conical surface of
the said ring, and the friction of the said lower end of the traveller against such
conical surface produces the desired tension. or drag on the yarn to effect the
winding on of the same on to the bobbin, spool or spindle. The smaller end of
the conical ring is placed so as to correspond with the smaller end or nose of the
chase of the cop, so that as the traveller is raised or lowered during the process of
winding a layer of yarn on to the chase of the cop, the point of the traveller,
through which the yarn passes or round which it is wound, follows the internal
surface of the conical ring by the action of centrifugal force and is moved outwards
as the winding diameter increases, and inwards as that diameter decreases, whereby
the tension or drag of the yarn is maintained sufficiently uniform whatever the
diameter which is being wound on to.
It will be understood that the traveller is carried round by the tension or drag
of the yarn in the aforesaid conical ring; that the weight of the traveller is
carried by the aforesaid bar or plates, or other suitable support; that the traveller
is free to turn independently of the spindle, and that the tension or drag of the
yarn is produced by the friction of the lower end of the traveller against the inner
surface of the conical ring into which it passes, such friction being produced by
the centrifugal force of the lower end of the traveller as the same revolves in the
said ring.
In the arrangement above described, the spinning spindle may remain at a
constant level and the conical ring and traveller be gradually raised as the cop
increases in length, the traveller having, besides the said gradual rising movement,
the up and down or traversing movement necessary to form the chase; or the
conical ring may remain stationary, and the traveller be raised and lowered to form
the chase of the cop, the spindle being gradually lowered as the cop increases in
length or on the other hand, the traveller may remain at a constant level, while
the conical ring and spinning spindle are traversed up and down to form the chase,
and the spinning spindle is also lowered gradually as the cop increases in length.
For convenience in piecing-up broken threads of yarn during the process of
spinning, the aforesaid conical ring may be made in two halves, the front half
being adapted to be removed to give access to the bobbin, spool or cop which is
being spun, and to facilitate the removal and replacing of the entire conical ring or
more especially of its front part, the said conical ring may be supported in a spring
socket attached to, or forming part of, the bar which carries the said rings. This
spring socket may consist of a part bored out cylindrically to receive a corre-
sponding part of the conical ring, such cylindrically bored part being split so that
it will spring slightly to admit of the insertion into it, and removal therefrom, of
the half, or the whole, if need be, of the said conical ring but will hold the same
firmly when inserted thereinto.
The abovementioned split socket may also be employed to hold the ordinary
Ing used in ring spinning frames, instead of the set screws usually employed.
In spinning frames generally in which the yarn is wound on to bobbins or spools,

page_text: or more especially when wound on the bare spindles in cop form, it is desirable,
after having wound a layer of yarn on to the chase from the base to the nose or
from the nose to the base thereof, to return the yarn to the base or to the nose as
the case may be, in order to commence the winding on of a fresh layer of yarn, as
quickly as possible, not only to prevent the undue accumulation of yarn at the nose
of the chase (which tends to prevent the proper "readying" of the cop) but also
to impart lateral strength to the cop by causing the yarn in its return from the nose
to the base or vice versa to lie on the chase at a considerable angle across the last
layer of yarn that has been wound on to it. In order to effect this quick return of
the yarn to the base or to the nose of the cop, it is necessary that the point of the
lever or other device acted upon by the cam which effects the said return of the
yarn, should be somewhat in the form of a knife edge to prevent the dwell while
passing the point of the cam which is produced by the use of a friction roller
between the said lever and the said cam, and consequently the said knife edge and
cam are subjected to considerable friction and consequent wear and tear.
This
wear and tear renders it practically impossible to dispense with the friction roller
and consequently the desired quick return cannot be effected by the arrangements
at present in use. The object of the second part of this invention is to obtain the
necessary quick return without the wear and tear due to the use of a knife edge, and
for this purpose I employ the following arrangement :-
Instead of constructing the cam so that it will give the entire range of motion
required I construct it so that it will give say half the motion required, and
arrange to operate with it another similar cam adapted to give the other half of
the motion required. This second cam is mounted on a stud or shaft which is
free to move parallel to itself to or from the centre of the stud or shaft carrying
the first mentioned cam and is connected by suitable means with the part to be
moved. The two cams are arranged and geared together so as to revolve with
corresponding parts of their two peripheries in contact with each other, the one
cam being free as before stated to advance towards the axis of the other or to
recede therefrom according as the radii of the parts in contact decrease or increase.
The peripheries of the two cams thus roll together with little or no sliding friction
and consequently little or no wear and tear, each cam giving or allowing one half
of the motion in either direction of the traversing rail or other part to be moved.
It will be understood that the cams effect the motion of the said part in one
direction and one or more springs or weights or other suitable devices effect the
motion in the other direction, the said springs or weights or other suitable devices
also keeping the cams in contact with one another as they revolve.
Dated this 17th day of November 1891.
P. P. CRAVEN:
W. H. Beck,
Per G. J. Gunyon,
115, Cannon Street, London, .Agent.
COMPLETE SPECIFICATION.
Improvements in or connected with Spinning and Doubling Frames
I, PHINEHAS PEARSON CRAVEN, formerly of 17 Everton Road, Chorlton-
on-Medlock, Manchester, in the County of Lancaster, but now residing at
16 Devonshire Street, Ardwick, Manchester in the County of Lancaster
Gentleman, do hereby declare the nature of the said invention, and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the accompanying two sheets of
drawings, and to the letters and figures marked thereon, that is to say:-
This invention relates to improvements more especially connected with ring
spinning and doubling frames, that is to say, spinning or doubling frames.in which

page_text: yarn; but
the winding of the yarn on to the bobbin, spool or spindle, is effected by the
friction of a traveller carried round a ring by the tension or drag of the
parts of such improvements are also applicable to other kinds of spinning and
donbling frames.
It is well known that in ring spinning frames as at present constructed the
tension or drag of the yarn, which in fact effects the winding on thereof on to the
bobbin or spool, varies according as the yarn is being wound on to a small or large
diameter; and when the yarn is being wound on to the bobbin, spool, or spindle in
cop form, this variation of tension or drag occurs during the winding on of each
conical layer, so that for each layer of yarn the tension or drag is greater while
winding on to the bare bobbin, spool, or spindle, than when winding on to the outer
and larger diameter of the conical layer of yarn. It is found in practice that in
order to avoid, on the one. hand, too much tension or drag when winding on the
smaller diameter, and too little when winding on the larger diameter, the diameter
of the empty hobbin, spool, or spindle must not be less than a certain dimension
when it is required that the diameter of the full bobbin, spool, or cop, shall have a
certain other dimension; because if the empty bobbin, spool, or spindle be made of
less diameter, and the tension or drag is sufficient to wind on tightly enough at the
larger diameter, it is increased to such an extent that the yarn breaks when winding
on at the smaller diameter. For this reason it is not, so far as I am aware,
practicable to spin in ring frames, as at present constructed, on the bare spindles
without limiting the external diameter of the cops to a size smaller than is
desirable.
Figure 1 of the drawings is a diagram illustrating the above described defect in
the ordinary ring spinning frame. A represents the ring, B the traveller which is
drawn round on the ring by the thread. The circle C represents the smallest
circumference at the nose of the cop, and E the direction of the thread extending
tangentially therefrom to the traveller B. The circle C represents the largest
circumference at the base of the cop chase, and E' the direction of the thread
extending tangentially therefrom to the traveller B. It will be seen that the
direction E of the thread from the circle C makes so great an angle with the
tangent GH to the ring A. that it could not draw the traveller B round, and would
be broken in the effort to do so; but the direction E' of the thread from the circle C'
makes so small an angle with the tangent GH that the traveller B would be drawn
round with comparatively little tension on the thread.
Now the object of one part of this invention is to obviate the abovementioned
defects, and for that purpose I cause the traveller, or at least that point of the
traveller through which the thread of yarn passes, or round which such thread is
wound on its way from the drawing rollers to the bobbin, spool or spindle, to be
moved inwards towards the centre of the spindle, or outwards away therefrom, more
or less in proportion as the diameter that the yarn is being wound on to varies, so
that the tension or drag of the yarn may remain practically constant whether the
yarn is being wound-on to a small or large diameter. That is to say that as the
diameter that the yarn is being wound on to decreases, the traveller, or the point
thereof through which the thread passes, or round which such thread is wound, is
moved inwards towards the centre of the spindle, and as that diameter increases,
the traveller, or such point thereof as aforesaid, is moved outwards away from the
centre of the spindle. By these means the angle at which the yarn draws the.
traveller with reference to the circumference of the ring remains practically
constant within certain limits, whatever be the diameter on which the yarn is
being wound.
Figure 2 of the drawing is a diagram illustrating the effect of my improved
arrangement. A represents the circle described by the point of the traveller when
winding on to the smallest circumference C of the cop chase. A' represents the
circle described by the point of the traveller when winding on to the largest
circumference of the cop chase. It will be seen that the direction E of the thread
_makes nearly the same angle with the tangent G H to the circle A that the

page_text: direction E of the thread makes with the tangent GH' to the circle A', so that
the resistance of the traveller B to motion round both the circles A and A' will be
nearly equal, and consequently the tensions of the thread will be nearly equal also
in both cases, and the same condition will obtain for all intermediate positions of
the traveller between the circles A and A', and of the winding on between the
circles C and C¹.
The traveller, or the point thereof through which the yarn is passed, or round
which such yarn is wound on its way to the spool or spindle, may be moved towards
and away from the centre of the spindle as the diameter of the cop varies, by means
of arrangements such as those shown in Figures 3, 4, 5, 6, 7 and 8 for example, in
which Figure 3 is a front elevation of a spinning spindle with this part of my
invention applied thereto; Figure 4 is a sectional elevation, and Figures 5, 6, 7
and 8 detail views to be hereafter described.
The traveller A is composed of a piece of wire, as shown in Figure 8, of a piece
of sheet metal as shewn in Figures 4 and 7, or other suitable material, the upper
end of which is provided with a disc A¹ or other suitable part provided with a
hole A2 adapted to take over the upper part of the spinning spindle B, or in some
cases over the upper part of the dead spindle or stud on which the spinning spindle
or tube revolves, in such manner that the said traveller A is free to rotate round
the said spinning or dead spindle, as the case may be, and to rise and fall thereon
to the extent necessary for the formation of the conical layers of yarn forming what
is called the chase of the cop and to rise gradually thereon to the extent necessary
for the formation of the entire cop. The traveller A is carried by a bar C through
the medium of bearing. plates D D¹, or other suitable devices, in such manner that.
while being free to rotate round the spindle B as aforesaid it can be raised and
lowered to the required extent by the said bar C and bearing plates D D'.
The said bearing plates are constructed as follows:-D is a plate the front end
of which has a recess D² formed therein to receive the disc A' of the traveller, and
a hole D³ through which the spindle B and the stem of the traveller pass. D¹ is a
cover plate secured to the plate D by two screws D, and having a hole Ds in it for
the passage of the spindle B. The cover plate D' prevents the traveller A from
rising out of the recess D2, but leaves the disc A' of the traveller perfectly free
to rotate in the said recess, round the spindle B. The disc A¹ being placed
between the plates D and D', is caused to follow the up and down movements of
the said plates and of the bar C to which the same are attached by steady pins D³,
or other means which allow of the easy removal of the plates from the bar C when
it is required to piece up broken threads. A slit D' is formed through the two
plates DD to facilitate the passage of the thread or yarn into the annular space
round the spindle B and thereby into the notch or opening A* in the disc A¹ of the
traveller.
At or near its lower end the traveller A is provided with an eye or loop A³, see
Figures 4, 7 and 8, through which the yarn is passed, on its way from the drawing
rollers to the bobbin, spool or cop E. The lower end of the traveller passes into
the interior of a truncated conical ring or shaper F which is supported by the
bar G in a position concentric with the spindle B. As the lower end of the
traveller is carried round by the tension or drag of the yarn in the conical ring F,
the centrifugal force generated in the traveller A forces the said lower end thereof
outwards against the internal conical surface of the said ring, and the friction of
the said lower end of the traveller against such conical surface produces the
desired tension or drag on the yarn to effect the winding on of the same on to the
bobbin, spool or spindle. The smaller and larger ends of the conical ring F are
placed so as to correspond respectively with the smaller end or nose and with the
larger end or base of the chase of the cop, so that as the traveller A is raised or
lowered within the said cone during the process of winding a layer of yarn on to
the chase of the cop, the lower end of the traveller follows the internal surface of
the conical ring by the action of centrifugal force, and is moved outwards as the
winding diameter increases, and inwards. as that diameter decreases, whereby the

page_text: tension or drag of the yarn is maintained sufficiently uniform whatever the diameter
which is being wound on to.
It will be understood that the traveller A is carried round by the tension or drag
of the yarn in the conical ring or shaper F, that the weight of the said traveller is
carried by the bar C and plate D or other suitable support that may be provided
that the traveller is free to turn independently of the spindle B, and that the
tension or drag of the yarn is produced by the friction of the lower end of the
traveller A against the inner surface of the conical ring F, such friction being
produced by the centrifugal force of the stem of the traveller as the same revolves
in the said ring or shaper and that the movement of the part of the traveller which
forms or carries the guide for the thread of yarn towards and away from the spindle
is effected by the joint action of the conical ring or shaper and the centrifugal force
of the traveller.
In the arrangement above described I prefer that the spinning spindle B shall
remain at a constant level, and the conical ring F and traveller A be gradually
raised as the cop increases in length, the traveller A having, besides the said
gradual rising movement, the up and down or traversing movement necessary to
form the chase. The movements of the traveller may be effected by apparatus of
the kind usually enployed in ring spinning machines for imparting similar move-
ments to the ordinary ring and traveller; but as the cone has only to be raised as
the cop increases in length, its movement may be effected by the modified apparatus
shown in Figures 9, 10 and 11 in which Figure 9 is an end view of so much of a
spinning machine as is necessary to illustrate the application of my invention
thereto; Figure 10 is a front elevation of part of such a machine, and Figure 11 a
section on line 1-1 of Figure 10.
The bar C carrying the plates D D' supporting the travellers is carried by a
series of rods sliding vertically in guides on the spindle rail H. 1 shows one of
such rods, I is a crosshead or arm secured to the lower end of the rod I, I' is a
chain one end of which is secured to the arm I* and the other end to a drum 12
fixed on a shaft I³ revolving in bearings in the frame of the machine. I is a drum
secured to the shaft 13, and 1' is a chain fixed at one end to the drum I, and at the
other end to a drum 1 fixed on the shaft I' turning in bearings in the building-
motion lever J. This drum I receives a step by step rotatory motion each time
the building-motion lever J descends, through the medium of the worm wheel J,
worm J, ratchet wheel J³ and pawl J, in a manner well understood in connection
with this class of machinery. This step by step rotatory motion of the drum I
causes the chain I to be gradually wound on to it and this turns the drum I',
shaft I, and drum 12, whereby the chain I' is gradually wound on to the latter,
drawing up the rod I and bar by an amount equal to the thickness of one thread
of yarn more or less after each wind-on. The upward traversing motion of the
traveller during the winding on from the base of the chase of the cop to the nose
thereof is effected by the quick downward movement of the building-motion lever J,
produced by the action of the ordinary heart cam or by the action of my improved
cams N N to be hereafter described. The downward motion of the lever pulls
the chain I, which turns the drum I, shaft 13 and drum 12, winding the chain I
on the drum 12 and drawing up the rod I and consequently the bar C, plates D D¹
and the travellers carried by them. The slower upward movement of the building-
motion lever, allows the bar C and plates D D' to fall, their superior weight acting
to carry the travellers downwards in the rings F and to push down the rod I, and
thereby to return the drum 12, shaft 12 and drum I' to their former positions. It
will be understood that each of the rods I is provided with its arm I*, chain I¹, and
appropriate drum 12.
The bar G, carrying the conical rings F, is carried by a series of rods sliding in
guides on the spindle rail H. K shows one of such rods. K* is a crosshead or
arm secured to the lower end of such rod K. K' is a chain, one end of which is
secured to the arm K* and the other end to a drum K² fixed on a shaft K3
revolving.in bearings in the frame of the machine. K' is a drum secured to the

page_text: shaft K³, and K is a chain fixed at one end to the drum K and at the other end
to a drum K turning on a stud K' fixed to the side frame L of the machine.
Connected to the drum K is a ratchet wheel K which is operated to the extent
of one or more teeth each time the building-motion lever J descends by a pawl K
carried thereby. A retaining pawl K carried by the side frame L prevents the
ratchet wheel K from turning backwards. The step by step rotatory motion of
the ratchet wheel K8 and drum K pulls the chain K, which turns drun K',
shaft K and drum K, drawing up the rod K and consequently the bar G and the
conical rings F, by means of the chain K, to an extent equal to the thickness
more or less of a thread of yarn after each winding on operation. It will be
understood that each of the rods K is provided with its arm K*, chain K, and
appropriate drum K²,
Instead of the spindle B remaining at a constant level, it may in some cases be
lowered gradually as the cop increases in length, the conical ring remaining
stationary and the traveller being raised and lowered therein to form the chase of
the cop, or on the other hand the traveller may, in some cases, remain at a constant
level while the conical ring and spinning spindle are traversed up and down to form
the chase of the cop, the spinning spindle being also lowered gradually as the cop
increases in length.
For convenience in piecing up broken threads of yarn during the process of
spinning, the aforesaid conical ring F may be made in two halves F and F, the
front half being adapted to be removed to give access to the bobbin, spool or
cop which is being formed, and to facilitate the removal and replacing of the entire
conical ring, or more especially of its front part, the said conical ring may be
supported in a spring socket F3 attached to, or forming part of, the bar G which
carries the said rings. This spring socket may consist of a part bored out
cylindrically to receive a corresponding cylindrical part F4 of the conical ring,
such cylindrically bored part being split at F so that it will spring slightly to
admit of the insertion into it and removal therefrom of the half, or the whole if
need be, of the said conical ring, but will hold the same firmly when inserted
thereinto.
To facilitate the doffing or removal of the completed cops from the spindles, the
travellers and the conical rings are raised by means of their carrying bars C and G
to a sufficient height above the tops of the spindles to admit of the cops being
drawn off the same without coming in contact with the said rings or travellers,
which are then returned to their lowest positions for the commencement of a fresh
set of cops.
The part of my invention above referred to has been described in connection
with the spinning and formation of cops with the chases upwards; but it is obvious
that it may be applied to the spinning and formation of cops with the chases
downwards by inverting the conical rings and the travellers, placing them and their
supporting bars below the cops and arranging the various movements accordingly.
In spinning frames generally in which the yarn is wound on to bobbins or spools,
or more especially when wound on the bare spindles in cop form it is desirable,
after having wound a layer of yarn on to the chase from the nose to the base
thereof, to return the yarn to the nose in order to commence the winding on of a
fresh layer of yarn, as quickly as possible, not only to prevent the undue accumu
lation of yarn at the nose of the chase, (which tends to prevent the proper
"readying of the cop), but also to impart lateral strength to the cop by causing
the yarn in its return from the nose to the base or rice rersú to lay on the chase at
a considerable angle across the last layer of yarn that has been wound on to it.
In order to effect this quick return of the yarn to the nose of the cop it is necessary
that the point of the lever or other device acted upon by the cam which effects the
said return of the yarn should be somewhat in the form of a knife-edge to prevent
the dwell while passing the point of the cam which is produced by the use of a
friction roller between the said lever and the said cam, and consequently the said
27

page_text: knife-edge and cam are subjected to considerable friction and consequent wear and
tear. This wear and tear renders it practically impossible to dispense with the
friction roller, and consequently the desired quick return cannot be effected by the
arrangements at present in use. The object of the second part of this invention is
to obtain the necessary quick return without the wear and tear due to the use of a
knife-edge, and for this purpose I employ the following arrangement:
:-
Instead of constructing the cam so that it will give the entire range of motion
required, construct it so that it will give say half the motion required, and
arrange to operate with it another similar cam adapted to give the other half of
the motion required. This second cam is mounted on a stud or shaft which is free
to move parallel to itself to or from the centre of the stud or shaft carrying the
first mentioned cam, and is connected by suitable means with the part to be moved..
The two cams are arranged and geared together so as to revolve with corresponding
parts of their two peripheries in contact with each other, the one cam being free,
as before stated, to advance towards the axis of the other or to recede therefrom
according as the radii of the parts in contact decrease or increase. The peripheries
of the two cams thus roll together with little or no sliding friction, and conse-
quently, little or no wear and tear, each cam giving or allowing one half of the
motion in either direction of the traversing rail or other part to be moved. It will
be understood that the cams effect the motion of the said part in one direction and
one or more springs or weights or other suitable devices effect the motion in the
other direction, the said springs or weights or other suitable devices also keeping
the cams in contact with one another as they revolve.
One method of applying the above described arrangement of cams to the
building-motion lever of a spinning machine is shown in Figures 9, 10 and 12,
Figure 12 being a sectional plan taken through the side. frame L on line 2-2 of
Figure 9 but with the tin drums and certain parts of the gearing removed for the
sake of clearness. M is the shaft that usually carries the heart cam.
N is a cam
mounted on the shaft M but arranged to give only half the amount of movement
required to be imparted to the building-motion lever J. N' is a cam similar to the
cam N but mounted on a short shaft P. turning in bearings in the bracket Q of
the lever J. The cams- N and N₁ revolve in opposite directions as shown by the
arrows, and motion is communicated from the shaft M to the shaft P by the
following means:-Motion is communicated from the shaft M to the shaft R
revolving in a bearing in the side frame I, by means of the bevil wheels S S',.
shaft T and bevil wheels U U. From the shaft R motion is communicated to the
shaft P by the bevil wheels V V', shaft W and bevil wheels X X!
In Figures 9 and 10 the building-motion lever J and the cams N N' are shown
in the position they respectively occupy at the moment when the yarn is at the
base of the chase, of the cop and the quick traverse from the base to the nose
is about to commence. The cams N and N' are in contact at their smallest radii,
and as they revolve in the direction of the arrows their points N* roll together,
the radii in contact rapidly increasing so that the shaft P and consequently the
building-motion lever J is forced quickly downwards, raising the traveller bars C
until the points Nx of maximum radius of the cams come in line with the centres
of the shafts M and P as shown in Figure 13, by which time the yarn has been
raised up to the nose of the cop. It will be seen that this operation will have
occupied about one eighth of the revolution of the cam shafts M and P, but this
may be varied as desired.. The remaining seven eighths of a revolution of the
shafts returns the cams N N to the position shown in Figure 9 and the traveller
rail C descends slowly during that time by reason of the gradual reduction of the
radii of the points of contact of the cams N and N', allowing the building-motion
lever J to be raised by the superior weight of the traveller bars C; the depression
of the latter carrying the yarn slowly from the nose to the base of the cop during
the winding-on and the rise of the building-motion lever J keeping the two
cams N. Nin contact.,

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what
I claim is :-
First. The improvement in ring spinning or doubling frames which consists in
causing the part of the traveller which forms or carries the guide for the thread of
yarn on its way from the drawing rollers to the bobbin, spool spindle, or cop, to
be moved inwards towards and outwards away from the spindle as the diameter
that the yarn is being wound on to varics, substantially as hereinbefore described.
Second. For the purpose of causing the part of the traveller which forms or
carries the guide for the thread of yarn on its way from the drawing rollers to
the bobbin, spool, spindle or cop, in a ring spinning or doubling frame, to be
moved inwards towards and outwards away from the spindle as the diameter that
the yarn is being wound on to varies, the employment of a truncated conical
ring or shaper against the internal surface of which the traveller is pressed by
centrifugal force while being drawn round by the tension of the yarn, and while
being traversed up and down in the said conical ring, substantially as herein-
before described, and illustrated in Figures 3, 4, 10 and 11 of the drawings.
Third. In a ring spinning or doubling frame, the traveller and the truncated
conical ring or shaper, combined, arranged and operating, substantially as herein-
before described, and illustrated in Figures 3 and 4 of the drawings.
Fourth. The construction of the conical ring or shaper in two parts carried in
and held together by a spring socket, substantially as hercinbefore described, and
illustrated in Figures 3 and 4 of the drawings.
Fifth. In a ring spinning or doubling frame the combination, with a lifting bar
or rail carrying the travellers, of a second lifting bar or rail carrying means or
devices whereby the part of the traveller which forms or carries the guide for the
thread of yarn on its way from the drawing rollers to the bobbin, spool, spindle,
or cop, is moved inwards towards, or outwards away from the spindle as the
diameter on which the thread is being wound varies, the said bars or rails having
independent and relative movements, substantially as hereinbefore described, and
illustrated in the drawings.
Sixth. In spinning and doubling frames, constructing the traversing gear for
traversing the yarn over the surface of the cop chase with two cams arranged to
roll together in contact with each other, one of the said cams being mounted on a
shaft or stud adapted to move towards or away from the shaft carrying the other
of the said cams, each such cam being adapted to impart a portion of the required
movement to the building-motion lever or other part by which the said traverse is
effected, substantially as hereinbefore described, and illustrated in Figures 9, 10
and 12 of the drawings.
Dated this 16th dox of Santambon 1902
P. P. CRAVEN,
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.