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 new shorting link mechanism for induction motor.
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
Inventors
Khatua Satya Ranjan of Crompton Greaves Ltd, machine (M7) Division, D-5 Industrial Area, MPAKVN, Mandideep-462046, Madhya Pradesh, India, 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:
The invention relates to the field of mechanical assemblies.
Particularly, this invention relates to mechanical assemblies for induction
motors.
This invention relates -to a new shorting link mechanism for induction
motor.
BACKGROUND OF THE INVENTION:
In current transformers, a hole is provided for the primary side winding which receives a cable of the motor winding.
All these arrangements are mounted on a terminal box which is called CT Box. In 3 phase motors, 3 neutral side cables are short circuited after they are passed through the current transformer. A separate structure is provided for shorting the neutral side cables. As space is a constraint in terminal box, separate structure for shorting makes it costlier and more complex.
There is a need for a mechanism which eliminates the requirement of a separate structure for shorting.

OBJECTS OF INVENTION;
An object of the invention is to provide a shorting link mechanism for induction motor, which eliminates the need for a separate structure for shorting link and wherein lesser cable size is required.
Another object of the invention is to provide a shorting link mechanism for induction motor, which can further reduce the assembly time of the motor and also reduced fabrication time.
Yet another object of the invention is to provide a shorting link mechanism for induction motor, which provides good mechanical support for the primary coils of the windings (of a transformer).
SUMMARY OF THE INVENTION:
According to this invention, there is provided a shorting link mechanism for induction motors, said induction motors receiving cable power cables through cable receiving means, each of said received cables adapted to terminate on a corresponding terminal box, said terminal box further being provided with a substantially tubular element running across said terminal box from said terminal cable to opposite side of said terminal box and further being short circuited on the other side of said terminal

box by means of a substantially elongate linear plate element having means to be fixed onto each of said corresponding terminal boxed.
Typically, said cable receiving means is a cable socket.
Typically, said mechanism includes a first securing means for securing said cable securing means to said terminal box.
Typically, said first securing means includes washer, nut, and stud
Typically, said mechanism includes a second securing means for securing said shorting link mechanism to said terminal box.
Typically, said second securing means includes washer and nut. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Figure 1 illustrates a schematic of the old shorting mechanism.
The invention will now be described in relation to the accompanying drawings, in which:
Figure 2 illustrates the shorting link for induction motor.

DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Figure 1 illustrates a schematic of the old shorting mechanism.
In current transformers, a hole (12) is provided for the primary side
winding which receives a cable (14) of the motor winding.
All these arrangements are mounted on a terminal box which is called CT Box (10). In 3 phase motors, 3 neutral side cables are short circuited after they are passed through the current transformer. A separate structure is provided for shorting the neutral side cables. This separate structure is a shorting stool (16) which receives the cable through a socket (18) which is fixed to said shorting stool by means of shorting link (20) and screw (22) As space is a constraint in terminal box, separate structure for shorting makes it costlier and more complex.
Figure 2 illustrates the shorting link for induction motor.
According to the invention, there is provided a shorting link mechanism (50) for induction motor when current transformers are used for measurement.

In accordance with an embodiment of this invention, there is provided a cable (52) receiving means (54) adapted to receive power cable. Typically cable receiving means is a cable socket.
In accordance with yet another embodiment of this invention, there is provided a terminal box (56) adapted to mount said cable, said cable receiving means, and said shorting link mechanism. Typically, for a 3-phase motor, 3-phase supply necessitates 3 power cables. Thus, 3 respective terminal boxes (50A, 50B, 50C) are provided, each receiving one power cable and a shorting link mechanism commonly attached to all 3 terminal boxes, for shorting purposes.
In accordance with still another embodiment of this invention, there is provided a substantially tubular element (60) running across said terminal box from said terminal cable to opposite side of said terminal box.
In accordance with still another embodiment of this invention, there is provided a first securing means (58A, 58B, 58C) for securing said cable securing means to said terminal box, thereby securing said cable to said terminal box. Typically, reference numeral 58A refers to a washer.

Typically, reference numeral 58B refers to a nut. Typically, reference numeral 58C refers to a stud.
In accordance with an additional embodiment of this invention, there is provided a second securing means (62A, 62B) for securing said shorting link mechanism to said terminal box. Typically, this connects the shorting link mechanism to said tubular element. Typically, reference numeral 62A refers to a washer. Typically, reference numeral 62B refers to a nut.
This mechanism eliminates the need for a separate structure for supporting the shorting link. The cable lengths required are now of smaller length. Additional fabrication for support structure is also eliminated. Assembling is easier. Material cost is saved and process time also reduces.

We claim :
1. A shorting link mechanism for induction motors, said induction motors receiving cable power cables through cable receiving means, each of said received cables adapted to terminate on a corresponding terminal box, said terminal box further being provided with a substantially tubular element running across said terminal box from said terminal cable to opposite side of said terminal box and further being short circuited on the other side of said terminal box by means of a substantially elongate linear plate element having means to be fixed onto each of said corresponding terminal boxed.
2. A mechanism as claimed in claim 1 wherein, said cable receiving means is a cable socket.
3. A mechanism as claimed in claim 1 wherein, said mechanism includes a first securing means for securing said cable securing means to said terminal box.
4. A mechanism as claimed in claim 3 wherein, said first securing means includes washer, nut, and stud
5. A mechanism as claimed in claim 1 wherein, said mechanism includes a second securing means for securing said shorting link mechanism to said terminal box.

6. A mechanism as claimed in claim 5 wherein, said second securing means includes washer and nut.