FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
AND
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 bearing housing for commutators' seasoning plant
APPLICANT(S)
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR(S)
Sharma Hemant and Singh Rajiv; both of Crompton Greaves Ltd., Machines (M7) Division, D-5 Industrial Area, MPAKVN, Mandideep - 462046, Madhya Pradesh, 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 the field of electrical and mechanical engineering and mechanical assemblies.
Particularly, this invention relates to the field of motor assemblies.
Still particularly, this invention relates to commutators of motors.
Specifically, this invention relates to a bearing housing for commutators' seasoning plant.
BACKGROUND OF THE INVENTION
A commutator is a rotary electrical switch in certain types of electric motors or electrical generators that periodically reverses the current direction between the rotor and the external circuit. A commutator is a common feature of a DC motor. This commutator consists of a number of segments of copper or of other suitable electrical conducting substance place together in the form of a ring with a sheet of electrical insulating substance between every two adjacent segments. The segments or bars of a commutator are held in position by an undercut clamping ring of an insulating material such as mica.
A commutator typically consists of a set of copper segments, fixed around part of the circumference of the rotating part of the machine (the rotor), and a set of spring-loaded brushes fixed to the stationary frame of the machine. The external source of current (for a motor) or electrical load (for a generator) is connected to the brushes.

Normally, the commutator bars and the insulation segments are placed side by side in an alternate manner and a cut is taken on the mica segment so that the surface of the mica segment is at a lower level as compared to the surface of the commutator.
The brushes are, preferably, carbon brushes which are used to contact the surface of the commutator.
The field of this invention relates to the seasoning process of commutators' manufacturing which is an essential component of DC motor. A commutator is mounted on a mandrel and rotated with high speed inside a seasoning oven. The mandrel is supported in the driving end and non-driving end by means of bearing housings. The base pedestal on which bearing housings are mounted and the driving mechanism of the mandrel is part of the seasoning plant. Prior art involved use of standard cast iron bearing housing having internal threads so that it is bolted to the base plate of the pedestal mounted on the floor. Vibration induced as a result of the rotation of the mandrel at high speeds is transmitted to the ground through the bearing housing. The light weight of the cast iron bearing housing consisting of bottom bearing case (bolted to the base plate) and top bearing case (bolted to the bottom casing) is susceptible to higher frequencies of the vibration since it has low shock resistance. Higher vibration frequency results in higher noise exceeding OHSHAS decibel limit standards at the shop floor requiring use of personal protective equipment by shop floor personnel. Lower shock resistance of cast iron block also resulted in breakage of bearing housing. Damage to the internal threads of the bottom casing of the block resulted in disposition of the block. The longer cycle times of seasoning and transmission of heat from the seasoning oven to the bearing through the mandrel resulted in excessive heating of the bearing housing reduces bearing life.

Hence, there is a need for an improved bearing housing for commutators' seasoning plant.
PRIOR ART
US472729 relates to a Journal Box. US547844 relates to a Pillow Block. US5346400A relates to a Sensor rotating apparatus. EP1193500 relates to a bearing housing with speed measurement device.
None of the above prior art documents disclose solutions to problems relating to vibration, noise, heat, and the like.
Hence, there is a need for an improved bearing housing for commutators which obviates the limitations of the prior art.
OBJECTS OF THE INVENTION
An object of the invention is to provide a robust bearing housing for commutators.
Another object of the invention is to reduce higher frequencies of vibration for a bearing housing of a commutator in a seasoning plant.
Yet another object of the invention is to improve shock resistance for a bearing housing of a commutator in a seasoning plant.
Still another object of the invention is to prevent excessive heating in relation to bearing housing of a commutator in a seasoning plant.

An additional object of the invention is to improve bearing life in a seasoning plant.
Another additional object of the invention is to provide a quick loading and unloading mechanism for commutators in a bearing housing for a seasoning plant.
SUMMARY OF THE INVENTION
According to this invention, there is provided a bearing housing for commutators' seasoning plant, said housing comprises: i. a first element with an operative first inner semicircular machined side; ii. a second element with an operative second inner semicircular machined side, said operative first inner semicircular machined side adapted to sit atop said operative second inner semicircular machined side to form a substantially complete circle such that a commutator fits / sits in said substantially complete circle. iii. studs adapted to extend from said second element, said studs being advantageously located in order to provide complete fixation of said second element below said first element; iv. counterbores adapted to be located on said first element adapted to receive
said studs of said second element, correspondingly; and v. sleeve elements, extending, from lateral edges of said first element.
Typically, said housing is a machined mild steel bearing housing.
Typically, said first element is an operative upper element.
Typically, said second element is an operative lower element.

Typically, said bearing housing comprises holes, advantageously located, laterally, on said second element adapted to receive studs from bottom side in order to rigidly locate said housing.
Typically, said counterbores are located such that it is spaced apart from an elevated portion of the semicircular arc of said first element.
Typically, said housing comprising nuts to be inserted on each of said studs after their location through respective counterbores in order to secure said housing.
Typically, said first element comprises an additional machined groove in said first inner semicircular machined side for temperature control to prevent excessive heating.
Typically, said second element comprises an additional machined groove in said first inner semicircular machined side for temperature control to prevent excessive heating.
Typically, said first element comprises a hole, located atop, for insertion of temperature sensor for temperature indication.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The invention will now be described in relation to the accompanying drawings, in
which:
Figure 1 illustrates a front view of the bearing housing;
Figure 2 illustrates a top view of the bearing housing;

Figure 3 illustrates an auxiliary view of the bearing housing;
Figure 4 illustrates a cut-open view of the bearing housing; and
Figure 5 illustrates a bearing housing of Figures 1, 2, 3, and 4 with a commutator and a seasoning plant.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
According to this invention, there is provided a bearing housing for commutators' seasoning plant.
Figure 1 illustrates a front view of the bearing housing.
Figure 2 illustrates a top view of the bearing housing.
Figure 3 illustrates an auxiliary view of the bearing housing.
Figure 4 illustrates a cut-open view of the bearing housing.
In accordance with an embodiment of this invention, there is provided a machined mild steel bearing housing. This bearing housing comprises a first element (12) with an operative first inner semicircular machined side (14). This first element is an operative upper element. This bearing housing further comprises a second element (22) with an operative second inner semicircular machined side (24). This second element is an operative lower element. The operative first inner semicircular machined side sits atop the operative second inner semicircular machined side to form a substantially complete circle. A commutator (50) fits / sits

in this substantially complete circle. The operative first inner semicircular machined side forms a semicircular arc from the outer side of the bearing housing.
The bottom surface area of the housing is a relatively larger bottom surface area with higher rigidity as a result of increased internal wail thickness.
In accordance with another embodiment of this invention, there are provided holes (25) adapted to receive studs from the bottom. These studs, typically, are hardened studs.
In accordance with yet another embodiment of this invention, there are provided studs (26) adapted to extend from the second element (22). These studs are advantageously located in order to provide complete fixation of the second element (22) below the first element (12).
In accordance with still another embodiment of this invention, there are provided counterbores (16) adapted to be located on the first element (12) such that they receive the studs (26) of the second element (22). The counterbores (16) are located such that it is spaced apart from the elevated portion of the semicircular arc of the first element so that there is ample space for use of a spanner in order to located a nut across the stud for securing purposes. The counterbores are guided through the studs, respectively, after fitment of the commutator seasoning mandrel.
Seasoning mandrel is unloaded and subsequently loaded in the seasoning plant for multiple cycles. It is essential to provide a quick loading and unloading mechanism for the commutator mandrel. The current invention involves insertion of nut on the stud (26) unlike tightening of bolt in prior art facilitating use of pneumatic tools for quick tightening of the bearing housing.

Further, in the current invention, the second element has no internal threads; hardened threaded studs are replaced at lower cost (as compared to the bearing housing) in case of damage.
In accordance with an additional embodiment of this invention, an additional groove (30) is machined on the first element (12) and second element (22) for temperature control to prevent excessive heating. Also a hole (40), atop the first element (12) is provided for insertion of temperature sensor for temperature indication. Machined grooves are also provided for insertion of spacer unlike in prior art.
In accordance with yet an additional embodiment of this invention, sleeve elements (35) are provided, extending, from the lateral edges of the first element (12). These sleeve elements of the bearing provide extra support extending life of the bearing and also reducing noise and vibration. Higher rigidity of machined bearing housing mounted on pedestal results in reduced noise and vibration within prescribed limits of OHSHAS. Use of personal protective equipment is not necessary at these noise limits.
Figure 5 illustrates a bearing housing of Figures 1, 2, 3, and 4 with a commutator (50) and a seasoning plant (60).
The Technical Advantage of the bearing housing of this invention lies in providing a rigid and stable bearing housing for commutators for use in a seasoning plant, which bearing housing reduces vibration, noise levels, and heat.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent

to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1. A bearing housing for commutators' seasoning plant, said housing
comprising:
i. a first element with an operative first inner semicircular machined side; ii. a second element with an operative second inner semicircular machined
side, said operative first inner semicircular machined side adapted to sit
atop said operative second inner semicircular machined side to form a
substantially complete circle such that a commutator fits / sits in said
substantially complete circle; iii. studs adapted to extend from said second element, said studs being
advantageously located in order to provide complete fixation of said
second element below said first element; iv. counterbores adapted to be located on said first element adapted to
receive said studs of said second element, correspondingly; and v. sleeve elements, extending, from lateral edges of said first element.
2. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said housing is a machined mild steel bearing housing.
3. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said first element is an operative upper element.
4. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said second element is an operative lower element.

5. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said bearing housing comprising holes, advantageously located, laterally, on said second element adapted to receive studs from bottom side in order to rigidly locate said housing.
6. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said counterbores are located such that it is spaced apart from an elevated portion of the semicircular arc of said first element.
7. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said housing comprising nuts to be inserted on each of said studs after their location through respective counterbores in order to secure said housing.
8. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said first element comprising an additional machined groove in said first inner semicircular machined side for temperature control to prevent excessive heating.
9. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said second element comprising an additional machined groove in said first inner semicircular machined side for temperature control to prevent excessive heating.

10. The bearing housing for commutators' seasoning plant as claimed in claim 1 wherein, said first element comprising a hole, located atop, for insertion of temperature sensor for temperature indication.