FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
AND
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2005
COMPLETE SPECIFICATION
(See section 10 and.rule 13)
TITLE OF THE INVENTION
METHOD OF TERMINATING LEAD WIRES OF SLIP RING ROTOR ON SLIP STUDS AND AN IMPROVED ROTOR THEREBY
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR
Bhutare Vitthal Dasharath, Pawar Bhagwat Bhimaji of Crompton Greaves Ltd. LT Motors Division, A-6/2 MIDC, Ahmednagar - 414111, Maharashtra, India; both Indian Nationals.
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 the field of slip ring rotors of induction motors.
Particularly, this invention relates to the field of electrical connections in slip ring rotors.
Still particularly, this invention relates to a method of terminating lead wires of slipring rotor on slip studs and an improved rotor stator thereby.
Background of the Invention:
Slip Ring Rotor is a rotating part of a motor. Slip rings motors are used to limit the starting current and to vary the starting torque. Typically, it is cylindrical in nature, and a plurality of bars is dispersed on the outer diameter of the rotor.
Electrical connections are made to the rotor bars by brazing lead wires to the bars of the rotor. These are then terminated by bolting on slip ring studs or the like methods of termination.
In the preparation of a motor, the rotor is dipped in resin during impregnation, and further baked in an oven. The resin dip causes the lead wires to harden before being bolted. These hard lead wires then have to be muscled about to achieve the desired position for termination on the slip ring studs. This activity causes stress to be induced in the lead wires.

There is a need for a better and improved termination mechanism of lead wires on slip ring studs, thereby providing an improved rotor.
Prior Art:
US3353041 discloses an Electric motor rotor with encapsulated end turns. The rotor which utilized the boot to provide a space for the slip ring leads inside the end windings, the connection between the end windings and the slip ring leads was made with a soldering iron that was, inserted inside the winding in the space made by the boot.
DE20316410 discloses a Slip ring assembly for an electric motor/generator has slip rings on a motor shaft with power-lead bolts aligned in parallel to the shaft. To supply over these slip rings with electrical current and/or in order to decrease from these slip rings electrical current, that is at least one current feed pin provided, which is the slip rings in approximately parallel alignment to the shaft penetrated and conductive connected electric with the slip rings. This bolt stands from the slip ring and/or. The slip ring package toward the end shield of the machine free forwards and trains thereby a plug.
There is a need for an improved termination mechanism.
Objects of the Invention:
An object of the invention is to provide an improved termination mechanism for termination of lead wires on a rotor.

Another object of the invention is to provide an improved rotor.
Yet another object of the invention is to provide a rotor with no induced stresses on lead wires,
Still another object of the invention is to improve the working condition and life of a rotor & hence the motor.
Summary of the Invention:
According to this invention, there is provided an improved rotor comprising:
- plurality of bars within said rotor, characterized in that, at least a bar is adapted to be fitted with an extension plate with a terminating mechanism adapted to terminate recipient wires onto said bar by means of said extension plate.
Preferably, said termination mechanism is a clamping mechanism.
Alternatively, said termination mechanism is a fixing mechanism.
Alternatively, said termination mechanism is a bolting mechanism.
According to another embodiment of this invention, there is provided a method of terminating lead wires of slipring rotor on slip studs and an improved rotor thereby, said method comprises the steps of:

- attaching extension plates with terminating mechanism on to at least a single bar of said rotor;
- preparing the rotor; and
- terminating received wires on to said terminating mechanism, thereby eliminating wires from being an integral part of preparation of rotor,
Typically, the step of preparing the rotor includes the step of resin dipping the rotor.
Typically, the step of preparing the rotor includes the baking the rotor.
Brief Description of the Accompanying Drawings:
Figure 1 illustrates a schematic of the existing termination mechanism of wires from slip rings on rotor of a motor.
The invention will now be described in relation to the accompanying drawings, in which:
Figure 2 illustrates a schematic of the new termination mechanism of wires from slip rings on rotor of a motor.
Detailed Description of the Accompanying Drawings:
Figure 1 illustrates a schematic of the existing termination mechanism of wires from slip rings on rotor of a motor.

A rotor stamping (10) (of a stator) is made of a plurality of (copper strips) bars (12). Slip rings (14) are coaxially placed with the rotor along a motor shaft (16). In this arrangement, brazed wires (18) are terminated, on slip ring studs, through a termination rod (20).
According to this invention, there is provided a method of terminating wires on rotors and an improved rotor thereby.
Figure 2 illustrates a schematic of the new termination mechanism of wires from slip rings on rotor of a motor.
In accordance with an embodiment of this invention, there is provided a rotor (10) with bars (12) wherein, at least one bar is adapted to be fitted with an extension plate (22) to receive wires (24). Typically, the extension is a good current conductive metal extension preferably copper, with a clamping or fixing mechanism (26).
Typically, three extensions are used to be fitted on to three bars of lead positions in rotor connections.
Typically, the rotor is resin dipped and baked without wires terminated onto it.
In accordance with another embodiment of this invention, there is provided a slip-ring with extending wires adapted to be connected to said stator. Typically, the wires are terminated to the extension plates, correspondingly.

We claim,
1. An improved rotor comprising:
- plurality of bars within said rotor, characterized in that, at least a bar is adapted to be fitted with an extension plate with a terminating mechanism adapted to terminate recipient wires onto said bar by means of said extension plate.
2. A rotor as claimed in claim 1 wherein, said termination mechanism is a clamping mechanism.
3. A rotor as claimed in claim 1 wherein, said termination mechanism is a fixing mechanism.
4. A rotor as claimed in claim 1 wherein, said termination mechanism is a bolting mechanism.
5. A method of terminating wires on rotor and an improved rotor thereby, said method comprising the steps of:

- attaching extension plates with terminating mechanism on to at least a single a bar, which is a lead position, of said rotor;
- preparing the rotor; and
- terminating received wires on to said terminating mechanism, thereby eliminating wires from being an integral part of preparation of rotor.

6. A method as claimed in claim 5 wherein, the step of preparing the rotor includes the step of resin dipping the rotor.
7. A method as claimed in claim 5 wherein, the step of preparing the rotor includes the baking the stator.