FORM2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
1. Title of the invention. - AN IMPROVED ARRANGEMENT FOR PHASE AND
NEUTRAL TERMINAL WITH SINGLE SCREW IN SINGLE MODULE MODULAR DEVICES

2. Applicant(s)
(a) NAME :
(b) NATIONALITY;
(c) ADDRESS:

LARSEN & TOUBRO LIMITED
An Indian Company.
L & T House, Ballard Estate, Mumbai 400 001, State of Maharashtra, India

3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improved single module modular devices along with phase and neutral terminal arrangement with the help of a single screw. More particularly, the invention is concerned about a cost effective, easy to assemble and de-assemble, compact and simple arrangement with less number of components for phase and neutral terminal in a single module with the help of single screw.
BACKGROUND AND THE PRIOR ART
There are many applications in modular devices where both phase and neutral terminals are required. One of these application in modular devices where both neutral and phase terminals are required for operation is Residual current circuit breakers(RCCB).Residual current circuit breaker (RCCB) works on the current balance principle. RCCBs are designed to disconnect quickly to mitigate the harm caused by electrical shocks. The supply conductors, i.e., the phases and the neutral, are passed through a toroidal core and form the primary windings of a current transformer. In a healthy circuit, sum of the currents in phases, is equal to the current in the neutral and the vector sum of all currents is equal to zero.
US 5841616 discloses a module for use with the circuit breaker, the module being arranged to be mounted on an end of the circuit breaker and to monitor and/or control the circuit breaker and/or an electrical circuit control thereby in use. The module can be active or passive, and, where circuit breakers are ganged in side-by-side relationship, the module can be equal in width to the width of the gang breaker unit to which the module is mounted. The invention also resides in the combination of a module and a circuit breaker.
RCCB in 2 modules are widely in use of our present day to day life. Some people are providing RCCB in single module also but they are not electromechanical, they are electronic. . In which neutral wire is provided as an integral part of the

switch without having separate terminals for it. In that case if user wants to remove the neutral wire he needs to first open the cover.
RCCB requires both phase and neutral terminal for their operation. Conventional RCCBs have 2 module arrangement for their operation in which they provide phase and neutral terminals side by side to each other. Panel space is always being an area of concern for the user. Looking to this concern, user may demand for RCCB in single module. So it is necessary to have provision for both phase and neutral terminal in single module. In the present invention both the terminals are provided in a single module. It has been found by the present inventors that by way of a unique construction of an arrangement for phase and neutral terminal a single module arrangement using single screw can be achieved which would require less space, less components, is simpler in construction, easy to assemble and de-assemble and cost effective.
OBJECT OF THE INVENTION
Accordingly, one object of the present invention is to overcome the disadvantages prevailing in the prior art and the existing system as discussed above.
Another object of the present invention is to combine phase and neutral terminal arrangement in a single module.
Another object of the present invention is to use single screw to tight both phase and neutral terminal in single module
Yet another object of the present invention is to provide an improved, cost effective and user friendly single module modular devices.

SUMMARY OF THE INVENTION
According to one aspect of the present invention there is provided an improved single module arrangement for phase and neutral terminals in single module modular devices, said arrangement comprising:
(i) housing;
(ii) nut means fixed substantially perpendicularly to said housing;
(iii) screw means operatively fastened to said nut means;
(iv) movable top terminal means which is in substantial tangency
with the cease of said screw;
(v) bottom terminal means fixed with said housing at a
predetermined proximity from said movable terminal;
(vi) bridge means located in-between said top terminal and said
bottom terminal means
wherein said bridge means comprises an insulating means
being in fixation with walls of said bridge by means of plural
holding means;
said bridge means in conjunction with the insulating means
being moved downward by said screw;
(vii) projection means provided on the walls of the said housing
such that the movement of the insulator and the bridge means is
restricted after a predetermined distance whereby said
insulating means comes in contact with said bottom terminal
tightening the neutral wire.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1: Arrangement of terminals in single module Figure 2: Exploded view of the assembly

Figure 3: Exploded terminal assembly Figure 4 (a): Bridge Figure 4 (b): Insulator
DETAIL DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The present invention relates to an arrangement to overcome the drawbacks of the conventional single module modular devices which has 2 module arrangements during an operation where phase and neutral terminals are used together.
The present invention uses single screw to tight both phase and neutral terminals in single module and such single arrangement make removal of any damaged phase and neutral wires easier. In the prior art or the existing systems it was found that for removal of damaged parts or wires it was required to de-assemble the whole arrangement which was quite cumbersome and complicated.
Following are the parts/components of the arrangement of the present invention:
1. Housing unit.
2. Screw.
3. Top terminal/Phase terminal.
4. Bottom terminal/Neutral terminal.
5. Insulator.
6. Projection in housing to carry 3.
7. Bridge with threads.
8. Projection in housing on which 5 rests.
9. Projection cut

10. Aperture on the bridge
11. Orifices
12. Nut
13. Lateral projection
Referring to figures 1 to 4b, during rotation of operator, the screw (2) moves downward and engages with the nut (12) (as shown in figure 2) fixed substantially perpendicularly to the walls in the housing (1). The top terminal (3) also known as phase terminal is fixed at the bottom of the screw (2). The movement of the screw (2) causes corresponding movement of the top terminal (3) downward. Phase wire (not shown in the figures) is inserted from the top opening (not shown in the figures) in housing (1) where it gets tight between the top moving terminal (3) and the insulating means (5). Once phase wire gets tight then further rotation of screw (2) causes the bridge (7) to move downward with the top terminal (3). Neutral wire is inserted from the bottom opening (not shown in the figures) in housing (1). Bottom terminal (4) also known as neutral terminal is fixed in the housing (1). The neutral wire gets tight between bottom terminal (4) and the moving bridge (7).
The bridge (7) at its base comprises projection cut (9), helps the screw (2) to tighten the top terminal (3) and the bottom terminal (4) along with the bridge (7). The projection cut in the housing also helps to lift up the bridges (7) with the terminals. There are two orifices (11) in the insulator (5) which accommodate the lateral projections (13) provided on the walls of the bridge (7). The orifices help to hold the insulator (5) upto and thus the insulator moves in conjunction with the bridge (7). The movement of the bridge and insulator assembly is restricted after a predetermined distance which is defined by a projection (8) provided in the housing on which the insulator (5) rests. The sliding movement of the bridge tighten the screw so that the bottom terminal (4) get tighten along with the bridge

(7). The bridge lift up the both terminal along with neutral by tighten up altogether with the help of the screw (2).
The invention has been described in a preferred form only and many variations may be made in the invention which will still be comprised within its spirit. The invention is not limited to the details cited above. The structure conceived is susceptible of numerous modifications and variations, all the details may furthermore be replaced with elements having technical equivalence. In practice the materials and dimensions may be any according to the requirements, which will still be comprised within its true spirit.

WE CLAIM
1. An improved single module arrangement for phase and neutral terminals
in single module modular devices, said arrangement comprising:
(i) housing;
(ii) nut means fixed substantially perpendicularly to said housing;
(iii) screw means operatively fastened to said nut means;
(iv) movable top terminal means which is in substantial tangency
with the cease of said screw;
(v) bottom terminal means fixed with said housing at a
predetermined proximity from said movable terminal;
(vi) bridge means located in-between said top terminal and said
bottom terminal means
wherein said bridge means comprises an insulating means
being in fixation with walls of said bridge by means of plural
holding means;
said bridge means in conjunction with the insulating means
being moved downward by said screw;
(vii) projection means provided on the walls of the said housing
such that the movement of the insulator and the bridge means is
restricted after a predetermined distance whereby said
insulating means comes in contact with said bottom terminal
tightening the neutral wire.
2. Arrangement as claimed in claim 1 wherein said insulator means comprises plurality of orifices.
3. Arrangement as claimed in claims 1 and 2 wherein said holding means comprises projections adapted to be accommodated in the said orifices.

4. Arrangement as claimed in any preceding claims wherein said housing further comprising projection cut adapted to tighten the top terminal and the bottom terminal along with the bridge.
5. An improved single module arrangement for phase and neutral terminals in single module modular devices as herein substantially described and illustrated with the accompanying drawings.