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
A tackle for handling a stator stamping pack
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai - 400 030, Maharashtra, India, an Indian Company
INVENTOR
Rupawate John, Crompton Greaves Ltd, LT Motors Division (M3), A-6/2 MIDC, Ahmednagar 414001, 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 tackle for handling a stator stamping pack. BACKGROUND OF THE INVENTION
A generally used tackle for lifting and placing a stator stamping pack in a work place comprises a pair of pivoted scissor members. The gripping ends of the scissor members are provided with gripping pads and an eyebolt is provided at the engaging end of the tackle. In order to lift a stator stamping pack, the gripping ends of the tackle are closed against the stator stamping pack and the hook of a lifting equipment like crane is engaged in the eyebolt and the stator stamping pack is lifted and placed in the work place in the vertical position. In order to insert conductors in the stator stamping pack, the stator stamping pack has to be tilted and placed in the horizontal position. This is normally done manually by putting a rod or the like through the stator stamping pack bore and tilting the stator stamping pack in the horizontal position. The stator stamping packs are heavy and the gripping pads provide limited gripping area on the stator stamping packs. As a result, the tackle provides limited gripping force and gripping of the stator stamping pack is not very positive. While lifting the stator stamping pack, there are chances for the stator stamping pack to slip out of the tackle and get damaged. This can also cause accidents. Wear and tear to the gripping pads are very high and they need to be replaced frequently. Besides, tilting of the stator stamping pack at the work place is cumbersome, time consuming and requires increased labour. Because of the limited gripping force and lack of positive grip, the tackle also cannot handle very heavy stator stamping packs.

OBJECTS OF THE INVENTION
An object of the invention is to provide a tackle for handling a stator stamping pack which tackle facilitates lifting of the stator stamping pack and tilting of the stator stamping pack and is user friendly.
Another object of the invention is provide a tackle for handling a stator stamping pack which tackle provides a positive grip and increased gripping force on the stator stamping pack so as to prevent slippage of the stator stamping pack and resultant damage to the stator stamping pack and accidents and also allows heavier stator stamping packs to be handled and which tackle facilitates adjustment of the gripping force.
Another object of the invention is to provide a tackle for handling a stator stamping pack, which tackle is simple in construction and has increased life and which tackle is collapsible and does not occupy much space while not in use.
DETAILED DESCRIPTION OF THE INVENTION
According to the invention there is provided a tackle for handling a stator stamping pack, the tackle comprising a split ring having clamping means at the split ends thereof and an antifriction liner at the inner surface thereof and sling means fixed to the split ring at diametrically opposite locations thereof and having engagement means at the centre of the distal end thereof so as to hold the split ring symmetrically.

The following is a detailed description of the invention with reference to the accompanying drawings, in which:
Fig 1 is an isometric view of the tackle for handling a stator stamping pack according to an embodiment of the invention; and
Fig 2 is an isometric view of the tackle for handling a stator stamping pack according to another embodiment of the invention.
The tackle 1 as illustrated in Fig 1 of the accompanying drawings comprises a split ring 2 formed with rectangular flanges 3, 3 at the split ends thereof projecting laterally outwardly from the split ends. 4 is an antifriction liner provided at the inner surface of the split ring. The liner is continuous and is riveted (rivets marked 5) to the inner surface of the split ring. The flanges are provided with bolt holes (not marked but can be visualized). One of the bolt holes in one of the flanges is free ie unthreaded and the other bolt hole in the other flange is multistart threaded. 6 is a multistart threaded bolt passing through the free bolt hole in the said one flange and through the threaded bolt in the other flange in thread engagement therewith. 7 is a handle for the bolt. The split ring is provided with a pair of cylindrical lugs 8, 8 at diametrically opposite locations thereof. The lugs project out laterally outwardly from the outer surface of the split ring. A pair of chains 9, 9 is suspended from an oblong support member 10. The free ends of the chains are provided with hooks 11, 11 which are engaged over the cylindrical lugs. Spacer blocks 12 provided on the outer surface of the split ring prevent the hooks rubbing against and damaging the split ring. The cylindrical lugs are provided with heads 13 which prevent the hooks from slipping out of the lugs. 14 is an eyebolt provided at the

centre of the oblong support member. The tackle 15 as illustrated in Fig 2 of the accompanying drawings comprises a pair of wire ropes 16 suspended from the oblong support member 10 and provided with hooks 11 at the free ends thereof. The hooks are engaged around the cylindrical lugs 8. The antifriction liner comprises a plurality of strips 17 riveted to the inner surface of the split ring. While handling a stator stamping pack, the split ring is engaged around the stator stamping pack and tightened on the stator stamping pack by tightening the bolt by holding the handle 7. The stator stamping pack is lifted and brought to the work place by engaging a hook (not shown) of a lifting equipment like crane (not shown) in the eyebolt 14 at the center of the support member 10 of the tackle. On positioning the stator stamping pack at the workplace, the stator stamping pack can be easily and effortlessly tilted to the horizontal position in the lifted position thereof by turning the split ring and the cylindrical lugs in the hooks at the free ends of the chains or wire ropes. Following this, the split ring is loosened on the stator stamping pack by operating the bolt and the split ring is disengaged from the stator stamping pack. Because the sling means holds the split ring at diametrically opposite locations and because the eyebolt is provided at the centre of the oblong support member, the stator stamping pack is symmetrically held in the lifted position and its lifting and tilting is easy and convenient. The split ring is made of any hard and mechanically strong material such as steel and the anti friction liner is made of a wear and tear resistant material selected from butadiene rubber, high vinyl butadiene rubber, 3, 4 isoprene rubber, isoprene butadiene rubber or a mixture thereof.
According to the invention the split ring provides a larger surface area of contact all around the stator stamping pack and a positive grip on the stator stamping pack. Therefore, the gripping is very positive and gripping force is very high. There are no

chances of slippage of the stator stamping pack from the split ring and accidents. Because of the gripping is very positive and the gripping force is high, the tackle can also handle heavier stator stamping packs. The antifriction liner also reduces frictional forces and provides a better grip. It also reduces wear and tear to the split ring and increases the life of the split ring. The stator stamping pack can be tilted in the horizontal position in the lifted up position and then lowered and placed in position at the work place. Tilting of the stator stamping pack in the lifted position is easy because of the engagement of the hooks at the free ends of the chains or strings over the cylindrical lugs. As a result, labour and time required for tilting are considerably reduced and tilting is very easy and convenient and the tackle is user friendly. The sling means comprising the chains or wire
while not in use.
The clamping means comprising the flanges and bolt arrangement can be of a different construction or configuration. The flanges need not be rectangular and can be square or other shapes. The clamping means can comprise two bolts instead of one bolt. The sling means comprising the chains or wire ropes arrangement can be of a different construction or configuration. Instead of handling a stator stamping pack, the tackle also can be used for handling any other cylindrical or symmetrical body or object. The antifriction liner reduces wear and tear to the split ring and ensures a good grip on the stator stamping pack but it is optional in that the tackle will work without the antifriction liner. Such variations of the invention are to be construed and understood to be obvious to those skilled in the art and within the scope of the invention.

We claim:
1. A tackle for handling a stator stamping pack, the tackle comprising a split ring having clamping means at the split ends thereof and an antifriction liner at the inner surface thereof and sling means fixed to the split ring at diametrically opposite locations thereof and having engagement means at the centre of the distal end thereof so as to hold the split ring symmetrically.
2. The tackle as claimed in claim 1, wherein the liner is continuous.
3. The tackle as claimed in claim 1, wherein the liner comprises a plurality of spaced strips.
4. The tackle as claimed in anyone of the claims 1 to 3, wherein liner is made of a material selected from styrene butadiene rubber, high vinyl butadiene rubber, 3, 4 isoprene rubber, isoprene butadiene rubber or a mixture thereof.
5. The tackle as claimed in anyone of claims 1 to 4, wherein the clamp means comprises a pair of flanges each projecting laterally outwardly from each of the split ends, one flange being formed with a free hole and the other flange being provided with a threaded hole matching with the free hole and a bolt passing through the free hole in the said one flange and through the threaded hole in the said other flange in thread engagement with the threaded hole, the bolt being provided with a handle.

6. The tackle as claimed in anyone of claims 1 to 5, wherein the split ring is
provided with a pair of cylindrical lugs at diametrically opposite locations thereof, the
cylindrical lugs projecting laterally outwardly from the split ring and the sling means
comprises a pair of chains suspended from an oblong support member, the free ends of
the chains each being provided with a hook engaged over a cylindrical lug and the
engagement means comprises an eyebolt provided at the center of the oblong support
member.
7. The tackle as claimed in anyone of claims 1 to 5, wherein the split ring is provided with a pair of cylindrical lugs at diametrically opposite locations thereof, the from the split ring and the sling means comprises a pair of wire ropes suspended from an oblong support member, the free ends of the wire ropes each being provided with a hook engaged over a cylindrical lug and the engagement comprises an eyebolt provided at the centre of the oblong support member.
8. The tackle as claimed in claim 6 or 7, wherein the cylindrical lugs are spaced from the split ring by spacers and are provided with heads,
9. The tackle as claimed in any one of claims 1 to 8 wherein the split ring is made of steel.
Dated this 22nd day of December 2008.