Title of Invention	WHARVE ASSEMBLY FOR A JUTE SPINNING MACHINE
Abstract	A wharve assembly for a jute spinning machine. The wharve assembly (1) comprises a spindle (2) the upper part (2a) of which is rotatably held in a pair of vertically spaced bearings (3a, 3b) located in a bearing housing (4) adapted to be fitted on a flyer rail. The upper end of the spindle protruds out of the bearing housing and adapted to be fitted with a cap. The lower part (2c) of the spindle protrudes down from the bearing housing and is formed with a pair of spaced flanges (6, 7) adapted to receive therebetween a belt connected to the wharve drive of the machine. The upper flange abuts against the inner race of the lower bearing mounted on the spindle. The lower end of the spindle is adapted to mount a flyer. The bearings are one time lubricated and sealed bearings.

Title of Invention

WHARVE ASSEMBLY FOR A JUTE SPINNING MACHINE

Abstract

A wharve assembly for a jute spinning machine. The wharve assembly (1) comprises a spindle (2) the upper part (2a) of which is rotatably held in a pair of vertically spaced bearings (3a, 3b) located in a bearing housing (4) adapted to be fitted on a flyer rail. The upper end of the spindle protruds out of the bearing housing and adapted to be fitted with a cap. The lower part (2c) of the spindle protrudes down from the bearing housing and is formed with a pair of spaced flanges (6, 7) adapted to receive therebetween a belt connected to the wharve drive of the machine. The upper flange abuts against the inner race of the lower bearing mounted on the spindle. The lower end of the spindle is adapted to mount a flyer. The bearings are one time lubricated and sealed bearings.

Full Text	FORM 2 THE PATENTS ACT, 1970 (39 of 1970) As amended by the Patents (Amendment) Act, 2005 & The Patents Rules, 2003 As amended by the Patents (Amendment) Rules, 2006 COMPLETE SPECIFICATION (See section 10 and rule 13) TITLE OF THE INVENTION Wharve assembly for ajute spinning machine APPLICANTS Indian Institute of Technology, Bombay, an autonomous research and educational institution established in India by a special Act of the Parliament of the Republic of India under the Institutes of Technology Act 1961, Powai, Mumbai 400076, Maharashtra, India INVENTOR Hirani Harish, Indian Institute of Technology. Bombay, Department of Mechanical Engineering, Powai, Mumbai 400076, Maharashtra, India, an Indian National PREAMBLE TO THE DESCRIPTION The following specification particularly describes the nature of this invention and the manner in which it is to be performed: FIELD OF THE INVENTION This invention relates to a wharve assembly for a jute spinning machine BACKGROUND OF THE INVENTION A jute spinning machine includes a plurality of wharve assemblies for supporting and driving the flyers disposed over the bobbins of the machine. The wharve assemblies are in turn supported on a flyer rail at the top thereof and aj-e driven by the wharve drive of the machine comprising belts engaged around the wharve assemblies. The bobbins are supported on a spindle rail and are disposed to describe a. reciprocating motion within the flyers. Jute yarn is wound on the bobbins at the desired twist by the flyers rotating around the bobbins. The bobbins reciprocate in the flyers so as to facilitate winding of the yarn along the length thereof. Besides winding the yarn on the bobbins, rotation of the flyers over the bobbins provides the required tension to the yarn. British Patent 490995 describes suspended wharve-driven flyer spindles for machines like jute spinning machines. The flyer spindle is supported for rotation in two rolling element bearings located in a stationary bearing housing. A wharve is formed integrally with the spindle and around the lower part of the bearing housing so as to form a receptacle for oil for the direct lubrication of the lower bearing. Means are provided for feeding oil upwards to the upper bearing as a consequence of rotation of a part rotating with the spindle. US Patent 4796419 describes a bearing assembly for a spinning or twisting spindle. A spindle is disposed for rotation in a pair of bearings located in a bearing housing extending almost along the entire length of the spindle. A port shaped driving wharve is fitted at the lower end of the spindle and it extends over the lower part of the bearing housing in a sleeve shaped way. A separating sleeve and a spacing sleeve are provided over the spindle between the bearings to form flow passages for the lubricant for lubrication of the bearings. US Patent 4997291 describes a bearing for spindles of spinning or twisting 2 machines. A spindle is rotatably held in a bearing housing which contains a collar bearing and a step bearing with a pivot bearing. The spindle is equipped with a driving wharve reaching over the collar bearing. It includes a centering sleeve that accommodates the step bearing. The centering sleeve is surrounded by a damping spiral located in an oil bath. The configurations of the above patents in general require the bearings to be lubricated. This is inconvenient and cumbersome to carry out and increases the maintenance cost. The configurations of the above patents in general also comprise a large number of components and are complicated in construction. They are bulky and heavy and their material cost is high. In the case of the wharve-driven flyer spindle of British Patent 490995 there is a physical contact between the bearing housing and wharve as is seen in Figs 1 and 4 thereof. This will develop frictional forces during rotation of the wharve around the bearing housing. As a result of all this, power consumption by the configurations of the above patents is high and their overall cost is high. Operation of the wharve assembly is also noisy. OBJECTS OF THE INVENTION An object of the invention is to provide a wharve assembly for a jute spinning machine, which assembly is compact and light weight and which assembly is simple in construction and is cost effective. Another object of the invention is to provide a wharve assembly for a jute spinning machine which assembly reduces power consumption and noise and does not require re-lubrication. 3 DETAILED DESCRIPTION OF THE INVENTION According to the invention there is provided a wharve assembly for a jute spinning machine, the assembly comprising a spindle the upper part of which is rotatably held in a pair of vertically spaced bearings located in a bearing housing adapted to be fitted on a flyer rail, the upper end of the spindle protruding out of the bearing housing and adapted to be fitted with a cap, the lower part of the spindle protruding down from the bearing housing and formed with a pair of spaced flanges adapted to receive therebetween a belt connected to the wharve drive of the machine, the upper flange abutting against the inner race of the lower bearing mounted on the spindle, the lower end of the spindle being adapted to mount a flyer, the bearings being one time lubricated and sealed bearings. According to an embodiment of the invention the lower flange comprises a plurality of fins projecting laterally from the outer surface thereof to form a fan. The following is a detailed description of the invention with respect to the accompanying drawings, in which : Figs 1, 2 and 3 are elevation, crossection and exploded view of a wharve assembly according to an embodiment of the invention, respectively; and Figs 4, 5 and 6 are elevation, crossection and exploded view of a wharve assembly according to another embodiment of the invention, respectively. The wharve assembly 1 of a jute spinning machine (not shown) as illustrated in Figs 1 to 3 of the accompanying drawings comprises a spindle 2, the upper part 2a of which is rotatably held in a pair of vertically spaced bearings 3a and 3b located in a bearing 4 housing 4 comprising an upwardly directed cup portion 4a at the upper end thereof and a downwardly directed cup portion 4b at the lower end thereof. The upper bearing 3a is located in the upwardly directed cup portion 4a and the lower bearing 3b is located in the downwardly located cup portion 4b. The upper end of the spindle protrudes out of the bearing housing and is externally threaded (threading marked 2b). An internally threaded cap (not shown) is tightened at the externally threaded upper end of the spindle to provide a grip for the spindle. The lower part 2c of the spindle protrudes down from the bearing housing and comprises a pair of spaced flanges 6 and 7 adapted to engage therebetween a belt (not shown) connected to the wharve drive (not shown) of the spinning machine. The lower end of the spindle is externally threaded (threading marked 2d) so as to mount a flyer (not shown) in thread engagement therewith. The upper flange 6 abuts against the inner race (not marked) of the lower bearing 3b fitted on the spindle. As the inner races of the bearings are mounted on the spindle the spindle and inner races rotate in unison. The upwardly directed cup portion is externally threaded (threading marked 4c) and is provided with a nut 8 in thread engagement therewith. The wharve assembly is mounted on the flyer rail (not shown) of the spinning machine by engaging the flyer rail in the gap 8a between the bottom of the downwardly directed cup portion and the nut and tightening the nut against the flyer rail. The wharve assembly 9 as illustrated in Figs 4 to 6 of the accompanying drawings comprises a lower flange 7 having a plurality of fins 10 projecting laterally from the outer surface thereof so as to form a fan. During the rotation of the spindle, the finned lower flange also acts as a fan so as to cool the bearings without any motive power. According to the invention the wharve assembly for driving the spindle comprises a pair of flanges for engaging the drive belt integrally formed with the spindle. The bearings 5 are one time lubricated and sealed bearings and do not require lubrication during use. The wharve assembly comprises fewer number of components and is compact and light weight. The material cost of the wharve assembly is considerably reduced and the entire construction of the wharve assembly is simplified. There is no friction between the bearing housing and rotating spindle. Therefore, development of frictional forces during the rotation of the spindle is eliminated and the noise level is reduced. Power consumption is reduced and the wharve assembly is economical. Further the bearings are kept cooled during rotation of the spindle without any motive power. Comparative studies were carried out using a typical conventional wharve assembly of British Patent 490995 and typical wharve assembly of the invention in a jute spinning machine comprising 120 wharve assemblies in each spinning frame. The test results were as follows: Table I Speed (rpm) Power input (W) Noise (db) Wharve Assembly of British Patent 490995 Wharve Assembly of Figs 1 to 3 Wharve Assembly of British Patent 490995 Wharve Assembly of Figs 1 to 3 1000 16 8 92-93 77-79 2000 41 20 97-99 80-81 3000 63 32 100-102 85-86 4000 87 47 102-103 86-87 5000 120 73 105-106 92-93 5500 132 94 106-106 93-94 6000 145 170 107-108 95-96 6 Table II Speed (rpm) Power input (W) Noise (db) Wharve Assembly of British Patent 490995 Wharve Assembly of Figs 4 to 6 Wharve Assembly of British Patent 490995 Wharve Assembly of Figs 4 to 6 1000 16 10 92-93 69-70 2000 41 20 97-99 71-72 3000 63 32 100-102 74-75 4000 87 47 102-103 80-81 5000 120 62 105-106 89-90 5500 132 71 106-106 90-91 6000 145 84 107-108 93-94 II is very clear from the above Tables that the power consumption and noise level of the wharve assemblies of the invention were considerably reduced. The wharve Assembly with fan further reduced the noise level. 7 We Claim: 1. A wharve assembly for a jute spinning machine, the assembly comprising a spindle the upper part of which is rotatably held in a pair of vertically spaced bearings located in a bearing housing adapted to be fitted on a flyer rail, the upper end of the spindle protruding out of the bearing housing and adapted to be fitted with a cap, the lower part of the spindle protruding down from the bearing housing and formed with a pair of spaced flanges adapted to receive therebetween a belt connected to the wharve drive of the machine, the upper flange abutting against the inner race of the lower bearing mounted on the spindle, the lower end of the spindle being adapted to mount a flyer, the bearings being one time lubricated and sealed bearings. 2. The wharve assembly as claimed in claim 1, wherein the lower flange comprises a plurality of fins projecting laterally from the outer surface thereof to form a fan. 3. The wharve assembly as claimed in 1 or 2, wherein the bearing housing comprises an upwardly directed cup portion at the upper end thereof and a downwardly directed cup portion at the lower end thereof and the upper and lower bearings being located in the upwardly directed cup portion and downwardly directed cup portion respectively, the upwardly directed cup portion being externally threaded and provided with a nut in thread engagement therewith, the wharve assembly being mounted on the flyer rail of the machine by engaging the flyer rail in the gap between the bottom of the downwardly directed cup portion and the nut and tightening the nut against the flyer rail, the lower end of the spindle being externally threaded to mount the flyer in thread engagement therewith. Dated this 16th day of January 2009. (Jose M A) of Khaitan & Co 8 Crompton Greaves Limited By their Agent & Attorney

Full Text

FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION (See section 10 and rule 13)
TITLE OF THE INVENTION
Wharve assembly for ajute spinning machine
APPLICANTS
Indian Institute of Technology, Bombay, an autonomous research and educational institution established in India by a special Act of the Parliament of the Republic of India under the Institutes of Technology Act 1961, Powai, Mumbai 400076, Maharashtra, India
INVENTOR
Hirani Harish, Indian Institute of Technology. Bombay, Department of Mechanical Engineering, Powai, Mumbai 400076, Maharashtra, India, an Indian National
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

FIELD OF THE INVENTION
This invention relates to a wharve assembly for a jute spinning machine BACKGROUND OF THE INVENTION
A jute spinning machine includes a plurality of wharve assemblies for supporting and driving the flyers disposed over the bobbins of the machine. The wharve assemblies are in turn supported on a flyer rail at the top thereof and aj-e driven by the wharve drive of the machine comprising belts engaged around the wharve assemblies. The bobbins are supported on a spindle rail and are disposed to describe a. reciprocating motion within the flyers. Jute yarn is wound on the bobbins at the desired twist by the flyers rotating around the bobbins. The bobbins reciprocate in the flyers so as to facilitate winding of the yarn along the length thereof. Besides winding the yarn on the bobbins, rotation of the flyers over the bobbins provides the required tension to the yarn. British Patent 490995 describes suspended wharve-driven flyer spindles for machines like jute spinning machines. The flyer spindle is supported for rotation in two rolling element bearings located in a stationary bearing housing. A wharve is formed integrally with the spindle and around the lower part of the bearing housing so as to form a receptacle for oil for the direct lubrication of the lower bearing. Means are provided for feeding oil upwards to the upper bearing as a consequence of rotation of a part rotating with the spindle. US Patent 4796419 describes a bearing assembly for a spinning or twisting spindle. A spindle is disposed for rotation in a pair of bearings located in a bearing housing extending almost along the entire length of the spindle. A port shaped driving wharve is fitted at the lower end of the spindle and it extends over the lower part of the bearing housing in a sleeve shaped way. A separating sleeve and a spacing sleeve are provided over the spindle between the bearings to form flow passages for the lubricant for lubrication of the bearings. US Patent 4997291 describes a bearing for spindles of spinning or twisting
2

machines. A spindle is rotatably held in a bearing housing which contains a collar bearing and a step bearing with a pivot bearing. The spindle is equipped with a driving wharve reaching over the collar bearing. It includes a centering sleeve that accommodates the step bearing. The centering sleeve is surrounded by a damping spiral located in an oil bath. The configurations of the above patents in general require the bearings to be lubricated. This is inconvenient and cumbersome to carry out and increases the maintenance cost. The configurations of the above patents in general also comprise a large number of components and are complicated in construction. They are bulky and heavy and their material cost is high. In the case of the wharve-driven flyer spindle of British Patent 490995 there is a physical contact between the bearing housing and wharve as is seen in Figs 1 and 4 thereof. This will develop frictional forces during rotation of the wharve around the bearing housing. As a result of all this, power consumption by the configurations of the above patents is high and their overall cost is high. Operation of the wharve assembly is also noisy.
OBJECTS OF THE INVENTION
An object of the invention is to provide a wharve assembly for a jute spinning machine, which assembly is compact and light weight and which assembly is simple in construction and is cost effective.
Another object of the invention is to provide a wharve assembly for a jute spinning machine which assembly reduces power consumption and noise and does not require re-lubrication.
3

DETAILED DESCRIPTION OF THE INVENTION
According to the invention there is provided a wharve assembly for a jute spinning machine, the assembly comprising a spindle the upper part of which is rotatably held in a pair of vertically spaced bearings located in a bearing housing adapted to be fitted on a flyer rail, the upper end of the spindle protruding out of the bearing housing and adapted to be fitted with a cap, the lower part of the spindle protruding down from the bearing housing and formed with a pair of spaced flanges adapted to receive therebetween a belt connected to the wharve drive of the machine, the upper flange abutting against the inner race of the lower bearing mounted on the spindle, the lower end of the spindle being adapted to mount a flyer, the bearings being one time lubricated and sealed bearings.
According to an embodiment of the invention the lower flange comprises a plurality of fins projecting laterally from the outer surface thereof to form a fan.
The following is a detailed description of the invention with respect to the accompanying drawings, in which :
Figs 1, 2 and 3 are elevation, crossection and exploded view of a wharve assembly according to an embodiment of the invention, respectively; and
Figs 4, 5 and 6 are elevation, crossection and exploded view of a wharve assembly according to another embodiment of the invention, respectively.
The wharve assembly 1 of a jute spinning machine (not shown) as illustrated in Figs 1 to 3 of the accompanying drawings comprises a spindle 2, the upper part 2a of which is rotatably held in a pair of vertically spaced bearings 3a and 3b located in a bearing
4

housing 4 comprising an upwardly directed cup portion 4a at the upper end thereof and a downwardly directed cup portion 4b at the lower end thereof. The upper bearing 3a is located in the upwardly directed cup portion 4a and the lower bearing 3b is located in the downwardly located cup portion 4b. The upper end of the spindle protrudes out of the bearing housing and is externally threaded (threading marked 2b). An internally threaded cap (not shown) is tightened at the externally threaded upper end of the spindle to provide a grip for the spindle. The lower part 2c of the spindle protrudes down from the bearing housing and comprises a pair of spaced flanges 6 and 7 adapted to engage therebetween a belt (not shown) connected to the wharve drive (not shown) of the spinning machine. The lower end of the spindle is externally threaded (threading marked 2d) so as to mount a flyer (not shown) in thread engagement therewith. The upper flange 6 abuts against the inner race (not marked) of the lower bearing 3b fitted on the spindle. As the inner races of the bearings are mounted on the spindle the spindle and inner races rotate in unison. The upwardly directed cup portion is externally threaded (threading marked 4c) and is provided with a nut 8 in thread engagement therewith. The wharve assembly is mounted on the flyer rail (not shown) of the spinning machine by engaging the flyer rail in the gap 8a between the bottom of the downwardly directed cup portion and the nut and tightening the nut against the flyer rail. The wharve assembly 9 as illustrated in Figs 4 to 6 of the accompanying drawings comprises a lower flange 7 having a plurality of fins 10 projecting laterally from the outer surface thereof so as to form a fan. During the rotation of the spindle, the finned lower flange also acts as a fan so as to cool the bearings without any motive power.
According to the invention the wharve assembly for driving the spindle comprises a pair of flanges for engaging the drive belt integrally formed with the spindle. The bearings
5

are one time lubricated and sealed bearings and do not require lubrication during use. The wharve assembly comprises fewer number of components and is compact and light weight. The material cost of the wharve assembly is considerably reduced and the entire construction of the wharve assembly is simplified. There is no friction between the bearing housing and rotating spindle. Therefore, development of frictional forces during the rotation of the spindle is eliminated and the noise level is reduced. Power consumption is reduced and the wharve assembly is economical. Further the bearings are kept cooled during rotation of the spindle without any motive power.
Comparative studies were carried out using a typical conventional wharve assembly of British Patent 490995 and typical wharve assembly of the invention in a jute spinning machine comprising 120 wharve assemblies in each spinning frame. The test results were as follows:
Table I

Speed (rpm) Power input (W) Noise (db)
Wharve Assembly of British Patent
490995 Wharve
Assembly of
Figs 1 to 3 Wharve Assembly of British Patent
490995 Wharve
Assembly of
Figs 1 to 3
1000 16 8 92-93 77-79
2000 41 20 97-99 80-81
3000 63 32 100-102 85-86
4000 87 47 102-103 86-87
5000 120 73 105-106 92-93
5500 132 94 106-106 93-94
6000 145 170 107-108 95-96
6

Table II

Speed (rpm) Power input (W) Noise (db)
Wharve
Assembly of
British
Patent
490995 Wharve
Assembly of
Figs 4 to 6 Wharve
Assembly of
British
Patent
490995 Wharve
Assembly of
Figs 4 to 6
1000 16 10 92-93 69-70
2000 41 20 97-99 71-72
3000 63 32 100-102 74-75
4000 87 47 102-103 80-81
5000 120 62 105-106 89-90
5500 132 71 106-106 90-91
6000 145 84 107-108 93-94
II is very clear from the above Tables that the power consumption and noise level of the wharve assemblies of the invention were considerably reduced. The wharve Assembly with fan further reduced the noise level.
7

We Claim:
1. A wharve assembly for a jute spinning machine, the assembly comprising a spindle the upper part of which is rotatably held in a pair of vertically spaced bearings located in a bearing housing adapted to be fitted on a flyer rail, the upper end of the spindle protruding out of the bearing housing and adapted to be fitted with a cap, the lower part of the spindle protruding down from the bearing housing and formed with a pair of spaced flanges adapted to receive therebetween a belt connected to the wharve drive of the machine, the upper flange abutting against the inner race of the lower bearing mounted on the spindle, the lower end of the spindle being adapted to mount a flyer, the bearings being one time lubricated and sealed bearings.
2. The wharve assembly as claimed in claim 1, wherein the lower flange comprises a plurality of fins projecting laterally from the outer surface thereof to form a fan.
3. The wharve assembly as claimed in 1 or 2, wherein the bearing housing comprises an
upwardly directed cup portion at the upper end thereof and a downwardly directed cup
portion at the lower end thereof and the upper and lower bearings being located in the
upwardly directed cup portion and downwardly directed cup portion respectively, the
upwardly directed cup portion being externally threaded and provided with a nut in thread
engagement therewith, the wharve assembly being mounted on the flyer rail of the machine
by engaging the flyer rail in the gap between the bottom of the downwardly directed cup
portion and the nut and tightening the nut against the flyer rail, the lower end of the spindle
being externally threaded to mount the flyer in thread engagement therewith.
Dated this 16th day of January 2009.

(Jose M A) of Khaitan & Co 8
Crompton Greaves Limited By their Agent & Attorney

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=NNvD6esAOCtCIiIYbqjUKw==&loc=vsnutRQWHdTHa1EUofPtPQ==

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Patent Number

279651

Indian Patent Application Number

115/MUM/2009

PG Journal Number

05/2017

Publication Date

03-Feb-2017

Grant Date

27-Jan-2017

Date of Filing

19-Jan-2009

Name of Patentee

INDIAN INSTITUTE OF TECHNOLOGY BOMBAY

Applicant Address

POWAI,MUMBAI 400076,MAHARASHTRA, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	HIRANI HARISH	INDIAN INSTITUTE OF TECHNOLOGY, BOMBAY, DEPARTMENT OF MECHANICAL ENGINEERING, POWAI, MUMBAI 400076, MAHARASHTRA, INDIA.

PCT International Classification Number

D01H1/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA