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
180° Reversible DC Machine with improved terminal box mounting


APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTORS
Khatua Satya Ranjan and Pangal Sarvesh, both of Crompton Greaves Limited, M7
Division, D5 Industrial Area, Mandideep, 462046, Madhya Pradesh, India, both are Indian Nationals
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention


This invention relates to a DC machine which is reversible by 180 degree with provision to easily change the terminal box position
A foot mounted DC machine is mounted on its feet and the terminal box is located on a face perpendicular to the feet. The terminal connections to the dc machine are made through this terminal box. The location of the terminal box can either be on the left hand side or the right hand side of the motor when viewed from the driving end of the machine. Changing the location of the terminal box from left hand side to right hand site at the site where the machine is mounted requires the detachment of the terminal box. In addition to this the internal cables termination which is made in the terminal box needs to be removed. This requires opening the motor and changing the internal wiring to make the terminal leads on the other side of the motor. This is a laborious and time consuming task and not safe in operation. It is desirable to be able to change the location of the terminal box easily with minimum effort without compromising any other feature of the machine. It can be possible to make cable arrangement at the front of the terminal box but having many disadvantages such as cables are so much thick so bending is difficult and it can occupy space also.
An object of the invention is to provide an arrangement which eliminates the disconnection of the cable leads & re-routing of the internal wiring, while changing the location of the terminal box on the motor.
Another object of the invention is to provide an arrangement wherein the tools used to perform the relocation of the terminal box is reduced and the time taken for the same is reduced
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Yet another object of the invention is to provide a solution to eliminate a process of making two types of machine having a terminal box either right or left side.
Yet another object of the invention is to prevent wrong packaging & dispatch of machine to customer as their requirement, which arises due left and right hand side terminal box in machine
According to the invention an improved DC machine comprises a terminal box mounted on the said machine with rotating mechanism
In accordance to the present invention, the invention provides two protrusions one on the motor side and the other on the terminal box face. A separate terminal box mounting spigot has been provided in the motor surface. A groove that is provided in this spigot enables the rotation of the terminal box constrained to one axis that is perpendicular to the surface of the motor where the box is mounted. A stopper restricts the rotation of the terminal box by more than 180 degrees. Another spigot in the terminal box is provided along with a hole for the stopper insertion.
In accordance to the present invention, the reversal of the motor by 180 degree is achieved by turning the motor upside down and mounting the motor on the additional foot pad provided on the top side of the motor. The FC unit position is reversed matching the top surface of the dc motor. The stopper is loosened and the terminal box is rotated by 180 degrees. The stopper is fastened again and the now the terminal box orientation is suitable for a reversed position of the motor. Hence, by minimal
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effort and time the dc motor has been reversed 180 degrees without opening the motor or changing the internal wiring scheme.