AN IMPROVED TEXTILE SPINDLE ASSEMBLY
FIELD OF INVENTION
The present invention relates to an improved textile spindle having an improved wharve.
BACKGROUND
A ring spinning machine for spinning yarns comprises number of spinning locations for the production of the yarn. The yarn can be produced by conventional means in the spinning station which comprises spindle, ring and ring traveler.
The spinning ring is located annularly around the spindle, upon which a traveler carried by the yarn travels to wind the yarn on the spindle. The twisting is accomplished by a spindle that rotates about its axis and the traveler that revolves around the spindle on the spinning ring. The spindle on which the take-up package is supported revolves at high speed and carries the yarn end with it. The traveler is made to revolve at high speed on the circular spinning ring. As a result of these revolutions the yarn is produced and they are wound on conical tubes and the cops are formed.
A typical spinning machine may comprise a fixed frame having a number of vertical supports and horizontal members carried on the vertical supports. The horizontal members may comprise creels for holding roving bobbin holders, yarn guide rail, ring rail, spindle rails etc. Drafting units are provided in the machines along with driven shafts that prepare the yarn from the untwisted fibers held by the roving bobbins. The drafted fibres from the drafting unit are provided to the spindle between the ring and ring traveler, which is coaxial to the spindle. The ring and the ring traveler are provided on a rail, usually known as ring rail, which can be lowered or raised along the axis of the spindle so that the yarn is wound uniformly along the length of the spindle to form a package of desired size.

The spindle is imparted a rotational motion with the help of a drive mechanism and a spindle tape which engages with a whirl or wharve on the spindle. The spindle is imparted a rotational motion about its axis by the drive at rotational speed of 18,000 rpm and above. While the spindle is rotated about its axis, the traveler with the yarn attached to it revolves on the annular path between the ring and the ring traveler around the spindle. As a result, the yarn is twisted and wound on a package core which is secured on the spindle after the drafting of the yarn is complete.
PROBLEMS IN PRIOR ART
The spindle is to be operative at very high rotational speeds of 18000 rpm and above. A diameter difference between spindle tape running portion and portion above in the wharve is provided in such a way that the yarn catcher assembly can be dismantled and assembled. The diameter difference and high rotational speeds of the spindle causes the spindle tape to shift from its position, as a result the spindle tape gets shifted up from its running position in the wharve to different location during cleaning of the spindle rail area using brush when the machine is in operation. This inadvertent shifting leads to different twist in yarn produced out of the spindle where the spindle tape shifting occurs.
OBJECT OF INVENTION
In order to avoid the inadvertent shifting of the spindle tape from the wharve, the wharve of spindle has been improved by introducing a wharve cap to increase the diameter difference between the spindle tape running portion in the wharve and portion above it. The wharve cap comprises a wharve cap locking cup which serves the purpose of locking the wharve cap on to the wharve body. The introduction of the wharve cap to the spindle assembly provides the following advantages:
The wharve cap prevents any inadvertent shifting of the spindle tape by increasing the diameter difference between the spindle tape running portion in the wharve and the portion above it.

It allows easy removal of plastic sleeve of yarn catcher assembly due to its snap fit construction by which the wharve cap can be removed whenever required before removal of plastic sleeve of yarn catcher. There is no significant power consumption difference since only an addition of a few grams of wharve cap is introduced to the weight of the spindle top part.
The wharve construction is such that no imbalance is introduced in the spindle top part.
STATEMENT OF INVENTION
The invention provides an improved textile spindle assembly, comprising a wharve, a spindle blade, an aluminium cone, a yarn catcher assembly, the spindle assembly characterized by a wharve cap placed adjacent to the spindle tape running surface of the wharve.
BRIEF DESCRIPTION OF DRAWINGS
Fig. 1 illustrates the schematic view of the known textile spindle assembly with yarn catcher assembly.
Fig. 2 illustrates a schematic view of the improved textile spindle assembly.
Fig. 3 illustrates a sectional view of the textile spindle assembly with the wharve cap assembly according to the invention.
Fig.4 illustrates an enlarged sectional view of the wharve cap assembly comprising the wharve cap and wharve cap locking member shown fitted on the wharve.
Fig. 5 illustrates an enlarged sectional view of the wharve cap.
Fig. 6 illustrates an enlarged sectional view of the wharve cap locking member.

DETAILED DESCRIPTION
An improved textile spindle is shown in figures 2 and 3. Figure 2 gives a perspective view of the textile spindle with the wharve cap. Figure 3 provides a sectional view of the improved textile spindle, clearly illustrating the various constructional features of the spindle. The basic spindle structure comprises an Aluminium cone (10), a yarn catcher assembly (2), a wharve (7) and a spindle blade (9). The said structures are aligned such that their axes coincide. The spindle assembly is provided a rotational motion with the help of a spinning tape (3) that establishes contact on the spinning tape working zone of the wharve (7) and driven by the drive mechanism (not shown).
A difference in the diameters of the spindle tape running portion of the wharve and the portion above it is provided for easy replacement of the retaining member (8) of the yarn catcher assembly (2). This diameter difference causes the shifting of the spindle tape from its position when the spindle rotates at a very high speed.
According to the present invention, a wharve cap assembly (4) is placed at the wharve (7) of the spindle (1), just above the spindle tape (3) working area of the wharve (7). This wharve cap assembly (4) is provided to give an enhanced diameter zone to prevent spindle tape shifting. The wharve cap assembly (4) comprises wharve cap (5) and wharve cap locking member (6). The wharve cap (5) and wharve cap locking member (6) are preferably made of polymer material such as nylon and preferably injection molded.
The wharve cap (5) being constructed in two halves with a first annular rib portion (5a), a second annular rib portion (5b) and an annular rim portion (5c) such that the wharve cap (5) can be positioned at the corresponding annular surfaces (7a, 7b and 7c) of the wharve (7). The outside diameter (d) of the annular rib portion (5a) being constructed greater than that of the outside diameter (dl) of the wharve cap locking member (6) for proper positioning of wharve cap locking member (6) over the wharve cap (5). The wharve cap (5) is

further provided with at least one annular groove (5d), preferably two. The wharve cap locking member (6) being provided with at least one projection (6a), preferably two, corresponding to the annular groove (5d) provided on the wharve cap (5). After positioning the two halves of the wharve cap (5) on the wharve (7), the wharve cap locking member (6) is inserted over the wharve cap halves such that the annular projections (6a) of wharve cap locking member (6) engages in the annular grooves (5d) provided in the wharve cap (5) by snap fit. By this the wharve cap (5) being firmly retained on the wharve (7).
It is to be further understood that the yarn catcher assembly (2) is fitted at the tip portion of the wharve (7) of the spindle (1) and is retained through the retaining member (8). In order to assemble and dismantle the yarn catcher assembly (2) it is essential to dismantle the wharve cap assembly (4). The snap fit construction facilitates that the wharve cap assembly can be easily removed, whenever required, prior to removal of the yarn catcher assembly.
It is also to be to be understood that the wharve cap assembly may be required not only for spindles with yarn catcher arrangement but also for spindles, wherein the diameter difference between the tape running area and the diameter of the portion adjoining the belt running area is significantly less. Here also the wharve cap assembly can be advantageously used to avoid the shifting of the spindle tape.
Since the wharve cap assembly is usually made from polymer materials and hence the addition of the wharve cap assembly on the spindle does not significantly affect the total weight of the spindle and thereby the power consumption since only negligible additional weight is added to the spindle due to the introduction of the wharve cap assembly.
The novel spindle is more effective over its known prior arts since the intermittent stoppages of the spinning operation due to slippage of the spindle tape from the spindle tape running area of wharve are avoided. The spindle can be effectively rotated at high rotational speeds with the avoidance of any unwanted twists being introduced in the yarn. The snap fit construction of the

wharve cap further avoids any difficulty in removal of the yarn catcher assembly.
In view of the present disclosure which describes the current best mode for practicing the invention, many modifications and variations would present themselves to those skilled in the art without departing from the scope and spirit of this invention. All changes, modifications and variations coming within the meaning and range of equivalency are to be considered within the scope.

We Claim:
1. An improved textile spindle assembly, comprising:
a wharve (7);
a spindle blade(9);
an aluminium cone (10);
a yarn catcher assembly (2) ;
the spindle assembly characterized by:
a wharve cap assembly (4) placed on the wharve (7) adjacent to the
spindle tape (3) running surface .
2. The improved textile spindle assembly as claimed in claim 1, wherein the
wharve cap assembly (4) has a snap fit construction.
3. The improved textile spindle assembly as claimed in claim 1, wherein the wharve cap (5) and the wharve cap locking member (6) are made of polymer material.
4. The improved textile spindle assembly as claimed in claim 1, wherein the wharve cap assembly (4) comprises a wharve cap (5) and wharve cap locking member (6).
5. The improved textile spindle assembly as claimed in claim 3, wherein the
wharve cap locking member (6) is joined to the wharve cap (5) by means of at
least one annular projection (6a) provided on the wharve cap locking member
(6) which run along the circumference of the wharve cap locking member with
corresponding annular groove (5d) provided on the wharve cap (5) which run
along the circumference of the wharve cap.
6. The improved textile spindle assembly as claimed in claim 3 and 4,
wherein the wharve cap (5) being constructed as two halves.
7. The improved textile spindle assembly substantially as hereinbefore