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
Adaptor and phase segregated terminal box combination of a rotating electric machine
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company


INVENTOR
Moudghil Ashish Saurabh , Crompton Greaves Limited, Engineering M7 Division,
Madhya Pradesh, 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 an adaptor and phase segregated terminal box combination of a rotating electric machine.
BACKGROUND OF THE INVENTION
An adaptor is used in combination with a phase segregated terminal box in order to adapt the terminal box and make it compatible for use with rotating electric machines of different ratings like electric motors of different ratings particularly high tension and low tension motors. An adaptor is first bolted onto a motor housing followed by a phase segregated terminal box is bolted onto the adaptor. Terminals of the motor are connected to the terminals of the terminal box by insulated electrical cables taken through the adaptor. The motor is connected to a power supply by insulated cables connected to the terminals of the terminal box. The terminal box is very heavy and is required to be manually lifted up and held in position usually with the help of a crane in order to bolt the terminal box onto the adaptor. Because of the terminal box being very heavy, lifting and holding the terminal box during mounting is very difficult and time consuming and requires substantial manpower and effort. Productivity is also reduced. Since the terminal box is manually lifted and held in position during tightening of the bolts,
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it is difficult to maintain perfect alignment between the mounting holes in the adaptor and in the terminal box. Therefore, large clearances or tolerances are provided between the bolt holes and bolts. As a result, the fitment between the adaptor and terminal box is not very rigid and over a period of use of the electric machine, there will be vibrations between the adaptor and terminal box and the operation of the electric machine becomes noisy. Vibrations will also damage the insulation of the cables interconnecting the terminals of the motor and terminal box over a period of time thereby requiring periodic replacement of the cables. Damage to the cables can also cause fire accidents. During servicing or maintenance if the terminal box is to be disassembled from the adaptor it will again require a lot of man power, effort and time for dismantling the terminal box and reassembling the terminal box. During assembling of the terminal box onto the adaptor, accidents can also occur due to slippage of the terminal box or the like.
OBJECTS OF THE INVENTION
An object of the invention is to provide an adaptor and phase segregated terminal box combination of a rotating electric machine, which is easy to assemble within reduced time, which requires reduced man power and effort and which increases productivity and is cost effective.
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Another object of the invention is to provide an adaptor and phase segregated terminal box combination of a rotating electric machine, which is easy to service and maintain.
Another object of the invention is to provide an adaptor and phase segregated terminal box combination of a rotating electric machine, which eliminates vibrations and damage to the insulated electric cables and fire accidents.
Another object of the invention is to provide an adaptor and phase segregated terminal box combination of a rotating electric machine, which eliminates accidents due to, for instance, slippage of the terminal box.
DETAILED DESCRIPTION OF THE INVENTION
According to the invention there is provided an adaptor and phase segregated terminal box combination of a rotating electric machine, wherein the adaptor and terminal box comprises supporting and pivoting means therebetween.
The following is a detailed description of the invention with reference to the accompanying drawings, in which:
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Fig 1 is an isometric view of an adaptor and phase segregated terminal box combination of a rotating electric machine like motor according to an embodiment of the invention;
Figs 2 and 3 are front and rear isometric vi^ws of the adaptor of the combination of Fig 1 and
Figs 4 and 5 are front and rear isometric views of the phase segregated terminal box of the combination of Fig 1.
The adaptor and phase segregated terminal box combination 1 as illustrated in Fig 1 of the accompanying drawings comprises an adaptor 2 (Figs 2 and 3 of the accompanying drawings;) and a phase segregated terminal box 3 (Figs 4 and 5 of the accompanying drawings) assembled together. Bolt holes in the adaptor are marked 4 and matching bolt holes in the terminal box are marked 5. The adaptor comprises a pair of support lugs 6 and 7 at one side thereof in vertically spaced apart relationship in the proximity of front surface thereof 8 and 9 are upright pivot pins provided on the upper surfaces of the support lugs. The terminal box is provided with a pair of lateral extensions 10 and 11 at one side thereof corresponding to the said one side of the adaptor. The lateral
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extensions are formed in the proximity of the rear surface of the terminal box in vertically spaced apart relationship corresponding to the support lugs. The lateral extensions are formed with engaging holes 12 and 13. Openings in the terminal box for connecting cables (not shown) are marked 14. The remaining details of the adaptor and terminal box have not been marked and described as such are not necessary for understanding the invention. The terminal box is assembled onto the adaptor by manually lifting the terminal box and passing the engaging holes in the lateral extensions of the terminal box over the upright pivot pins on the support lugs. The terminal box is rested or supported on the support lugs of the adaptor with the lateral extensions engaged against the support lugs. The terminal box is turned on the support lugs of the adaptor about the upright pivot pins and closed against the adaptor and the terminal box and the adaptor are bolted together with bolts (not shown) tightened in the bolt holes of the terminal box and adaptor. While tightening the bolts, the terminal box remains supported on the support lugs of the adaptor and there is no need for holding the terminal box in position manually with or without the help of a crane. As a result, effort and time required for assembling the terminal box onto the adaptor are considerably reduced. Labour required is also considerably reduced and productivity is increased. Accidents which may occur due to slippage of the terminal box is also avoided. As the effort required for
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holding the terminal box is substantially reduced it is possible to easily align the bolt holes in the terminal box and adaptor. Therefore, dimensional accuracy of the bolt holes in the adaptor and terminal box can be perfectly matched. As a result, large tolerances between the bolts and bolt holes can be eliminated and instead close tolerances can be maintained so as to ensure a rigid fit between the adaptor and terminal box. This will reduce vibrations and noisy operation of the electric machine. Consequently damage to the electric insulation of the cables interconnecting the terminals of the machine and terminals of the terminal box is reduced and resultant fire accidents is also avoided. Requirement for periodic replacement of the cables is also avoided. Benefits of reduced time and labour and effort are also available during disassembling of the terminal box for maintenance or service. It is also easy to service and maintain the combination.
The geometry and profile of the supporting and pivoting means between the adaptor and terminal box can vary. The invention is essentially in holding the terminal box against the adaptor with the bolt holes in the terminal box and adaptor aligned so as to facilitate mounting of the terminal box on the adaptor by tightening the bolts in the bolt holes in the terminal box and adaptor with reduced effort and within reduced time and optionally with minimal use of a crane and in mounting the terminal box
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and the adaptor without any play between the bolts and bolt holes. Any variations in the construction and configuration of the supporting and pivoting means so as to achieve the above objective is obvious to a person skilled in the art and should be construed and understood to be within the scope of the invention.
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We claim
1) An adaptor and phase segregated terminal box combination of a rotating electric machine, wherein the adaptor and terminal box comprises supporting and pivoting means therebetween.
2) The combination as claimed in claim 1, wherein the supporting and pivoting means comprises a pair of support lugs provided at one side of the adaptor in the proximity of the front surface thereof in vertically spaced apart relationship, each of the support lugs having an upright pivot pin on the upper surface thereof and a pair of lateral extensions at the corresponding side of the terminal box in the proximity of the rear surface thereof, the lateral extensions being vertically spaced apart corresponding to the support lugs and formed with engaging holes adapted to be engaged over the upright pivot pins on the upper surfaces of the support lugs.
3. The combination as claimed in claim 1, which is a high or low tension electric motor.
Dated this 22nd day of December 2008
(Jose M A)
ofKhaitan&Co
Agent for the Applicants
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