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
PROVISIONAL SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
An oven for endurance testing of capacitors
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400
030, Maharashtra, India, an Indian Company
INVENTORS
Rohan Nadkarni and Vaibhav Kunkolienkar, of Crompton Greaves Limited, Fans & Appliances Division, Plot No. 1, Goa IDC Industrial Estate, Bethora, Ponda, Goa -403409, India, both Indian Nationals.

PREAMBLE TO THE DESCRIPTION
The following specification describes the invention


The present invention relates to an oven for endurance testing of capacitors
A capacitor needs to undergo an endurance test before the same is released for mass production. An endurance test is performed on the capacitors to test its overall performance. In an endurance test the capacitor needs to be supplied an external voltage of 580- 600 volts across its terminal and the same needs to be kept in an environment of temperature 85 degree plus-minus 2 degrees for around 300 hours. For the purpose of endurance testing an apparatus is required. In the conventional method the endurance testing is carried out in an open D0X shaped oven in which all the capacitors are connected by an external supply wires supplying the said voltage of 5tftf—oW Sbite. Conventionally, aiV trie apparatus, wfilcn are usec for endurance testing, capacitors are taken into various batches in the form of a bunch. The test for the particular bunch needs around 300 hours to be completed and the apparatus cannot be opened till 300 hours. Also any new bunch cannot be added to the apparatus in between when test is in progress as it may damage th.e capacitor and increase the chances of errors in the output. This process of endurailce test is a time consuming, and error prone
Hence, to overcome the disadvantages mentioned herein an 0Ven for endurance test is disclosed herein.
An object of the invention is to provide an oven for enqurance testing, which has an inbuilt arrangement of drawers to load separate batches of capacitors.
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Another object of the invention is to provide an oven for endurance testing, in which the capacitors can be loaded directly into the separate drawers of the oven.
Yet another object of the invention is to provide an oven for endurance testing, in which the drawers have a termination point which can automatically connect to external high voltage supply of 580-600 volts supply.
Another object of the invention is to provide an oven for endurance testing, which can automatically maintain a temperature ranging from 70-90 degree inside the oven.
Another object of invention is to provide an oven for endurance testing, which can facilitate batch wise testing of capacitors without disturbing the other testing process.
In accordance with the invention, an oven for endurance comprising plurality of modular drawers further comprises an arrangement to load a bunch of capacitors. The oven can have an electrical heater with cut out system to maintain a temperature ranging from 75-90 degree. The temperature range can be varied depending upon the requirement and modification in the construction of the oven.
In accordance with the invention the plurality of drawers can have independent power supply ranging from 550 to 620 volt. The range of the voltage supply can be varied depending upon requirement and modification in the construction of the oven.
In accordance with the invention the arrangement of the plurality of the drawers are modular in nature i.e. at any moment of time any drawer can be withdrawn without
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disturbing the endurance testing process to facilitate the batch wise testing of capacitors
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In accordance with the invention the plurality of the drawers can be further covered by an external door, which can act as an extra protective covering for the oven.