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, 2005
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
Slow closing handle assembly for circuit breaker.
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR
Shroff Suhas Pramodchandra , Crompton Greaves Ltd , S2, Switchgear Complex, A3, Ambad, MIDC Nashik, Maharashtra, 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 the field of circuit breakers, particularly a slow closing handle assembly for circuit breaker assembly.
BACKGROUND OF THE INVENTION:
Electrical loads, devices, and. connections may be subjected to electrical fluctuations or short-circuit due to interruptions in power supply or over load or under load. In any of these circumstances, the load or device is subjected to breakdown if the surges are not effectively prevented from acting on them. One way is to ensure seamless supply. Another way is to monitor the aberrations, and in case of faults, simply break the electrical connection.
Many electrical circuit breakers may be employed at plausible pain points in an electrical device such as a PCVCB. However, they are susceptible to their own working faults, thus not providing a complete and secure damage preventing mechanism for the electrical device.
OBJECTS OF THE INVENTION:
An object of the invention is to provide a mechanism to operate an assembly / device fitted with a circuit breaker, which circuit breaker may not operate due to mechanical failures thus resulting in working failure of said assembly / device.

An object of the invention is to provide a slow closing Handle assembly to operate the mechanism of a circuit breaker in order to ensure the uninterrupted power supply.
Another object of the invention is to provide a concentrated force actuated by manual energy in order to operate the mechanism of the circuit breaker.
Another object of the invention is an easy to use and operate circuit breaker assembly.
Yet another object of the invention is to provide a circuit breaker assembly in cases of emergency.
SUMMARY OF THE INVENTION:
According to this invention, there is provided a slow closing handle assembly for circuit breaker assembly adapted to be used with a circuit breaker for actuating said circuit breaker, manually, said assembly comprises;
a. shaft handle adapted to be angularly displaced for actuating the circuit
breaker assembly;
b. lead screw adapted to be orthogonally placed with respect to and in
communication with said shaft, said lead screw adapted to convert said
angular motion of said shaft into a linear motion in line with the longitudinal
axis of said lead screw;
c. slow closing bracket adapted to provide central support to said assembly,
and further adapted to guide said linear motion of said lead screw; and

d. ball and socket joint with ball located at an operative distal tip of said lead screw and socket located in communication with further elements of the circuit breaker assembly, said linear motion of said lead screw adapted to concentrate the force to a distal point of said ball which in turn is transferred to the socket, thereby actuating said further element in order to break the circuit.
Typically, said lead screw is an internally threaded lead screw.
Typically, said further elements include a kinematic lever roller of the circuit breaker mechanism adapted to receive said concentrated force.
Typically, said further elements include:
a. plurality of strip elements connected to each other end to end in a collapsible
manner;
b. link element connected to said plurality of strip elements;
c. cam element adapted to connect said plurality of strip elements to said link
element; and
d. resilient means adapted to connect cam element to said plurality of strip
elements, in a pre-defined configuration, said pre-defined configuration
being such that the linear actuation of the lead screw causes the plurality of
strip elements to align in a pre-defined manner, thus engaging the resilient
means to pull back the Link which is supported by said cam.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The invention will now be described in relation to the accompanying drawings, in which:

Figure 1 illustrates a schematic of the slow closing handle assembly, used in a circuit breaker;
Figure 2 illustrates a schematic of the configuration of the circuit breaker assembly in its initial condition i.e. in trip mode; and
Figure 3 illustrates a schematic of the configuration of the circuit breaker assembly in its closed condition i.e. during making the circuit.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
According to this invention, there is provided a slow closing handle assembly adapted to be worked mechanically in circumstances when parts of other circuit breakers employed in an electrical device fail to work.
Typically, said slow closing handle assembly is adapted to be used with a circuit breaker.
Figure 1 illustrates a schematic of the slow closing handle assembly for circuit breakers (100).
In accordance with embodiment of this invention, there is provided a handle (10) adapted to be angularly displaced for actuating the circuit breaker assembly. Typically, this handle (10) is an operating handle of the assembly.
Typically, this shaft is a handle adapted to be rotated in a clockwise direction.

In accordance with another embodiment of this invention, there is provided a lead screw (20) adapted to be orthogonally placed with respect to said shaft (10). Typically, the lead screw (20) is adapted to convert the angular motion of said shaft (10) into a linear motion. Said linear motion is in line with the longitudinal axis of said lead screw (20).
In accordance with yet another embodiment of this invention, there is provided a slow closing bracket (30) adapted to provide central support to said Slow closing assembly, and specifically to guide the linear motion of said lead screw (20).
In accordance with still another embodiment of this invention, there is provided a ball and socket joint (40) adapted to concentrate the force exerted by linear motion of said lead screw (20) to a point on the ball which in turn touches the socket. This concentrated force is further used to move forward/push a kinematic lever roller of the circuit breaker mechanism.
Figure 2 illustrates a schematic of the configuration of the circuit breaker assembly in its initial condition i.e. when circuit breaker is in trip mode.
In accordance with an additional embodiment of this invention, there is provided a plurality of strip elements (50) connected to each other end to end in a collapsible manner, a Link (60) connected to plurality of strips (50) by means of Cam (70) and by means of a resilient means (80) in a pre-defined configuration.
Figure 3 illustrates a schematic of the configuration of the circuit breaker assembly in its closed condition i.e. making the circuit

Said pre-defined configuration is such that the linear actuation of the lead screw (20) causes the plurality of strips (50) to align in a manner as shown in Figure 3, thus engaging the resilient means (80) to pull back the Link (60) which is supported by said Cam (70).
Thus, in cases of emergency, the operating handle (10) is rotated. Typically, this rotation is clockwise. This, in turn, actuates the linear motion of the lead screw (20) which is supported by the bracket (30). The motion is effected on to the ball and socket joint (40) for point transfer, and finally on to said pre-defined configuration for Making the circuit in emergency.
Once the circuit breaker is closed by this slow closing assembly, it can be unscrewed and removed from the mechanism.

We claim,
1. A slow closing handle assembly for circuit breaker assembly adapted to be used with a circuit breaker for actuating said circuit breaker, manually, said assembly comprising:
a. shaft handle adapted to be angularly displaced for actuating the circuit
breaker assembly;
b. lead screw adapted to be orthogonally placed with respect to and in
communication with said shaft, said lead screw adapted to convert said
angular motion of said shaft into a linear motion in line with the longitudinal
axis of said lead screw;
c. slow closing bracket adapted to provide central support to said assembly,
and further adapted to guide said linear motion of said lead screw; and
d. ball and socket joint with ball located at an operative distal tip of said lead
screw and socket located in communication with further elements of the
circuit breaker assembly, said linear motion of said lead screw adapted to
concentrate the force to a distal point of said ball which in turn is transferred
to the socket, thereby actuating said further element in order to break the
circuit.
2. An assembly as claimed in claim 1 wherein, said lead screw is an internally threaded lead screw.
3. An assembly as claimed in claim 1 wherein, said further elements include a kinematic lever roller of the circuit breaker mechanism adapted to receive said concentrated force.

4. An assembly as claimed in claim 1 wherein, said further elements include:
a. plurality of strip elements connected to each other end to end in a collapsible
manner;
b. link element connected to said plurality of strip elements;
c. cam element adapted to connect said plurality of strip elements to said link
element; and
d. resilient means adapted to connect cam element to said plurality of strip
elements, in a pre-defined configuration, said pre-defined configuration
being such that the linear actuation of the lead screw causes the plurality of
strip elements to align in a pre-defined manner, thus engaging the resilient
means to pull back the Link which is supported by said cam.