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
An anti-seismic mounting assembly for a transformer provided with wheels
APPLICANTS
Crompton Greaves Limited, CG House, Dt Annie Besant Road, Worli,
Mumbai 400 030, Maharashtra, India, an Indian Company
Inventors
Vaidya Sameer Sharadchandra of Crompton Greaves Ltd, Tl division, CG Global R&D Centre, Kanjur (E), Mumbai 400042, 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 an anti-seismic mounting assembly for a transformer provided with wheels. BACKGROUND OF THE INVENTION
A transformer provided with wheels/rollers facilitates can be moved easily from one place to another. Such transformers are either rolled on a rail track or on a rigid surface to the installation point. At the exact point of installation, the wheels either rest on a rail track or a rigid surface. The wheels are locked to restrict their movement during operation of the transformer. One among the many ways to lock the wheels, one is by way of using an L-shaped bracket, one end of which is fixed to the wheel and the other end to the rigid surface or the surface adjacent to the rails, whichever the case may be. It has been generally observed that however firm the locking of the wheels is, during seismic vibrations, such is found to be insufficient and de facto there is some movement of the wheels resulting in vibrations being passed to the transformer. This may cause damages to the internal components in the transformer resulting in improper or no functioning of the transformer at all. Therefore, there is a need to protect a transformer provided with wheels from seismic vibrations. OBJECTS OF THE INVENTION
An object of the invention is to provide an anti-seismic mounting assembly for a transformer provided with wheels.
Another object of the invention is to provide an anti-seismic mounting assembly for a transformer provided with wheels without removing the wheel mounts thereof.

DETAILED DESCRIPTION OF THE INVENTION
According to the invention, there is provided an anti-seismic mounting assembly for a transformer provided with wheels, the wheels being mounted on a rail or a rigid surface, the assembly comprising a plurality of support frames and at least one packing plate corresponding to each support frame, each frame having a bottom surface and a top surface supported on the bottom surface through at least one upstanding member, each frame disposed below the transformer such that the bottom surface is mounted to the rigid surface and the top surface maintaining a clearance with the bottom portion of the transformer to which the wheels are mounted, the packing plates having a thickness more than the said clearance such that when mounted on the corresponding top surfaces of each frame in the said clearance, wheels of the transformer remaining elevated from the rail or the rigid surface and the transformer remaining supported on the frames through the packing plates.
Preferably, the rigid surface and/or the surface on which the rail is mounted is a plinth. The bottom surfaces of the frames are bolted to the plinth and the top surface of the frames are bolted to the bottom portion of the transformer through the corresponding packing materials. The packing materials is made up of mild steel.
These and other aspects, features and advantages of the invention will be better understood with reference to the following detailed description, accompanying drawings and appended claims, in which,
Fig 1 is a schematic view of a transformer provided with wheels mounted on an anti-seismic mounting assembly.
Fig 2 is a schematic view of an anti-seismic mounting assembly without the transformer.

Fig 3 is a front exploded view of a transformer provided with wheels mounted on an anti-seismic mounting assembly
Referring to the drawings, a transformer 1 is provided with six wheel assemblies 2 mounted to the bottom portions 3 of the transformer tank of the transformer 1. Rails 4 are provided at the installation site of the transformer 1 on which the transformer 1 is rolled to the exact point of installation after it's unloading from the carriage. The rails 4 at the exact point of installation are mounted on a plinth 5 to render extra strength and stability. Before rolling the transformer 1 to the exact point of installation, support frames 6-9 are placed on the either sides of the rails 4, Each frame 6-9 is a rectangular shaped structure made up of cast iron or steel or material of the like capable of supporting heavy structures such as transformers thereupon. As shown in figs 2 & 3, each frame is having a bottom surface 10 and a top surface 11. In frames 1 & 4, the top surface 11 is supported on the bottom surface 10 through a pair of upstanding members 12 & 13 mounted at the corresponding edges of the bottom 10 and top 11 surfaces. In frames 2 & 3, an additional upstanding member 14 is mounted at the corresponding centers of the bottom 10 and top 11 surfaces to render extra stability and support. According to the preferred embodiment, the bottom 10 and top 11 surfaces along with the upstanding members 12, 13 and/or 14 in the support frames 6-9 are manufactured integrated with each other. The width of the bottom 10 and top 11 surfaces at their corresponding proximal and distal ends is provided a bit larger, again to render extra stability and support. The height of the upstanding members 12, 13 & 14 is provided such that, after the transformer 1 is rolled onto the exact point of installation, the corresponding top surfaces 11 of each frame 6-9 maintain a clearance with the bottom surface of the transformer tank. The transformer 1 is jacked up thereafter by means of jacks (not shown). Subsequently, on

the top surface 11 of each frame 6-9 at the corresponding proximal and distal ends thereof, a packing plate 15 is mounted. Each packing plate 15 is made up of mild steel and has a shape and size corresponding to the surface it is mounted upon. Each packing plate 15 is provided with a thickness larger than the clearance between the top surface 11 and bottom portion 3 of the transformer tank to which the wheel assemblies 2 are mounted. Now when the transformer 1 is jacked down, it lands on the packing plates 15 and the wheels of the wheel assemblies 2 maintain a clearance with the rails 4. Thus, the transformer 1 is supported on the frames 6-9 through the packing plates 15 instead of the wheels. Finally, the transformer 1 is bolted to the top surface 11 through the packing plates 15 and the bottom surface 10 is bolted to the plinth 5. The amount of clearance between the rails 4 and the wheels depends on the largeness of the thickness of the packing plates 15. For example, if the thickness of the packing plates 15 is provided 10mm larger than the clearance between the top surface 11 of the frames 6-9 and the bottom portion 3 of the transformer tank, the clearance between the rails 4 and wheels is also rendered to be nearly 10mm.
It is obvious to a person skilled in the art that, although the above described embodiment includes rails, an embodiment without rails has no effect on the working of the invention. Number of wheels may be more or less than six. Correspondingly, number of support frames may increase or decrease. The shape of the support frames may not be necessarily rectangular and can have any shape. The intent is to provide support to the transformer. All frames may have similar or different shapes and similar or different numbers of upstanding members. The top and bottom surfaces and the upstanding members may not be manufactured integrated with each other and be assembled together. The packing plates may be provided on the entire top surface and not necessarily on the proximal and distal ends of the support frames as described in

the above preferred embodiment. The packing materials may be made up any other material including damping materials such as rubber or cork.
According to the invention, at the exact point of installation of the transformer and therefore during the operation of the transformer, the transformer remains supported on the frames and not on the wheels. Therefore, better anti-seismic capability is provided to the transformer. Also, since the wheels are not in contact with the rails or the plinth surface, they are not required to be locked thereto.
Although the invention has been described with reference to a specific embodiment, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiment, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore contemplated that such modifications can be made without departing from the scope of the invention as defined in the appended claims.

We claim:
1. An anti-seismic mounting assembly for a transformer provided with wheels,
the wheels being mounted on a rail or a rigid surface, the assembly comprising
• a plurality of support frames and at least one packing plate corresponding to each support frame,
• each frame having a bottom surface and a top surface supported on the bottom surface through at least one upstanding member, each frame disposed below the transformer such that the bottom surface is mounted to the rigid surface and the top surface maintaining a clearance with the bottom portion of the transformer to which the wheels are mounted,
• the packing plates having a thickness more than the said clearance such that when mounted on the corresponding top surfaces of each frame in the said clearance, wheels of the transformer being elevated from the rail or the rigid surface and the transformer remaining supported on the frames through the packing plates.

2. The anti-seismic mounting assembly as claimed in claim 1, wherein the packing plates are of a shape and size corresponding to the shape and size of the top surface of the corresponding frames.
3. The anti-seismic mounting assembly as claimed in claim 1, wherein the packing plates are made of a damping material.
4. The anti-seismic mounting assembly as claimed in claim 1, wherein the packing plates are made of mild steel.
5. The anti-seismic mounting assembly as claimed in claim 1, wherein the bottom surface of each frame is bolted to the rigid surface.

6. The anti-seismic mounting assembly as claimed in claim 1, wherein the bottom portion of transformer is bolted to the top surface of each frame through the corresponding packing plates.
7. The anti-seismic mounting assembly as claimed in claim 1, wherein the opposite end portions of each frame are relatively larger.
8. The anti-seismic mounting assembly as claimed in claim 1, wherein the packing plates are mounted on the opposite end portions of top surfaces of each frame.