FORM2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10; rule 13)
1. Title of the invention. - AN INNOVATIVE METHOD OF ARRANGING
AN IN-BUILT SURGE SUPPRESSOR IN A DC CONTACTOR
2. Applicant
(a) NAME : LARSEN & TOUBRO LIMITED
(b) NATIONALITY : An Indian Company
(c) ADDRESS : 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:

FIELD OF INVENTION
The present invention relates to an improved surge suppressor assembly. The invention particularly relates to an improved assembly for surge suppressing comprising suitable design of terminal means with reduced number of joints and fixing components thereby accounting for compactness of assembly and reduction in assembling/dismantling time of the suppressor assembly.
BACKGROUND AND PRIOR ART
A surge suppressor is an electrical device commonly .used to arrest power surges. Typically if we switch off any electro magnetic device the stored energy in the magnetic circuit releases in terms of a spike or surge. This sudden increase in voltage can damage other low voltage components in the circuit. To arrest this type of sudden increase in voltage due to switching off of contactor, a surge suppressor is connected across the magnetic circuit of the contactor.
Generally surge suppressor is provided in an additional housing that can be mounted on the contactor housing. So a surge-suppressing device consists of an extra housing and two terminals. But here the housing of the surge suppressor adds a new component. Sometimes the overall
dimension of the product also increases because of surge suppressor.
In built surge suppressor, which is provided within the contactor is connected to the coil terminals by using
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four terminals increasing number of components and joints.
US5,517,382 describes a surge arrester containing' two connection fittings which are spaced apart from one another along an axis and between which at least one cylindrical varistor element is arranged. The connection fittings and at least one varistor element are clamped with one another, accompanied by the formation of contact force, to form a mechanically stable active part of the surge arrester. The connection fittings contain bearing areas which correspond respectively to the number of the loops.
US4,424,547 describes a surge suppressor of this type which includes a stack of metal-oxide varistor blocks that have non-linear voltage-current characteristics and an insulating housing in which said stack is located.
In none of the cited art an assembly with compactness and reduction of dismantling / assembling time leading to a cost effective suppression assembly is described.
Thus there is a need to provide for an improved assembly for surge suppressing giving compactness of assembly and reduction in assembling/dismantling time of the suppressor assembly.
The present inventors have now found that an unique design and integration/ arrangement of components can lead to a suppression assembly with reduced number terminals / joints making the assembly cost effective.
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OBJECTS OF INVENTION
One object of the present invention is to provide a surge suppressing assembly having in-built surge suppressing element.
Another object of the present invention is to provide less number of joints leading to the mechanical simplicity of the suppressing assembly.
Yet another object of the present invention is to provide integration / fixture of the components/means so as to hold them in position without any dislocation even when the holding screws are removed.
The other object of the present invention is to reduce transfer of vibration to suppressing elements thereby increasing the life time of the assembly.
SUMMARY OF INVENTION
Thus according to one aspect of the present invention there is provide a surge suppression assembly, said assembly comprising :
former having plurality of guiding and supporting means; plurality of terminal means being operatively disposed reciprocally through said guiding means so as to hold surge suppressing element in a predetermined location mounted on the former thereby forming closed circuit, wherein
said terminal means comprising plurality of modular sections including plurality of horizontal and vertical
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sections bearing predetermined angular relationships in plural planar axes, wherein a plate section is located in a manner to operatively juxtapose with former.
According to another aspect of the present invention there is provided a terminal means comprising plurality of modular sections including plurality of horizontal and vertical sections bearing predetermined angular relationships in plural planar axes, wherein a plate section is located almost parallely to one of the horizontal sections.
DETAILED DESCRIPTION OF INVENTION
In the present invention surge suppression assembly comprises plurality of terminal means which includes plurality of modular sections comprising plurality of horizontal and vertical sections bearing predetermined angular relationships in plural planar axes. The base or the horizontal section comprises of elongated profile (henceforth described as section-I) traveling to an appropriate distance where it bends bearing an appropriate angle and proceed further to a predetermined length, forming section-II thereby providing the horizontal section an approximate "L" shape profile in the same plane of disposition. Section - I comprises vertical upward projection (henceforth described as section - III) which comprises a plate like structure which maintains an appropriate angle with section - III. The said plate like structure has an aperture adapted tc
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accommodate screw means which acts as an additional support to the coil terminal means.
In one embodiment of the present invention two such
terminal means are reciprocally located on coil former which comprises plurality of guiding and supporting means for the terminals. Guiding means comprises plurality of projections along the perpendicular plane of the bottom of the former. The projections comprise slots of appropriate dimensions allowing accommodation of section - II in a manner to nullify vibration providing a secured and reliable joint. The supporting means comprises lateral ribs having resting land and flanges encapsulating certain portions of section-I and section-Ill so as to restrict movement of the terminal means in
all degrees of freedom even when the assembly is unscrewed. Section - II s of each of the terminal means
intermediately connect with surge suppressing element so as to complete the circuit of the terminal means. The surge suppressing element comprises tiny varistors
located on the former and inside housing of the assembly thereby adding to the compactness of the assembly.
BRIEF DESCRIPTION OF ACCOMPANYING FIGURES
Figures 1 and 2 illustrate isometric views of the surge suppression assembly of the present invention.
Figure 3 illustrates the terminal means of the present invention.
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DETAILED DESCRIPTION OF ACCOMPANYING FIGURES
In figures 1 and 2 the surge suppressing element (3) is provided at the bottom of the coil former (4) and connected to the terminals 1 and 2. Section - II s (6,7) is connected to suppressing element (3) . Projections (8) comprise slots (9) to- accommodate section-II s (6,7). Lateral ribs (10) have resting land (11) and flanges (12) which encapsulate certain portions of section-I (1), and section-III (13).
In figure 3 the terminals are illustrated in details. Section-I (1) travels to an appropriate distance to bend forming section-II (6) . Section - I (1) comprises vertical upward projection section - III (13) which comprises a plate (14). Plate (14) has an aperture (15) adapted to accommodate screw means (5) (shown in figure 1) which are self lifting screw washer assembly.
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 terminal element and guiding and supporting means herein described may be replaced by its technical equivalence and yet the invention can be performed. The structure thus 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.
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WE CIAIM
1. A surge suppression assembly, said assembly
comprising:
former having plurality of guiding and supporting
means;
plurality of terminal means being operatively disposed
reciprocally through * said guiding means so as to hold
surge suppressing element in a predetermined location
mounted on the former thereby forming closed circuit,
wherein
said terminal means comprising plurality of modular
sections including plurality of horizontal and
vertical sections bearing predetermined angular
relationships in plural planar axes, wherein a plate
section is located in a manner to operatively
juxtapose with former.
2. Terminal means comprising plurality of modular sections including plurality of horizontal and vertical sections bearing predetermined angular relationships in plural planar axes, wherein a plate section is located almost parallely to one of the horizontal sections.
3. Terminal means as claimed in claims 1 and 2, wherein the horizontal section comprises elongated profile traveling to an appropriate distance thereafter bending to an appropriate angle forming an approximate "L" shape profile in the same plane of disposition.
4. Terminal means as claimed in claims 1 to 3, wherein the plate means comprises appropriate apertures.
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5. A surge suppression assembly as claimed in claim 1,
wherein guiding means comprises plurality of
projections perpendicularly located on the bottom of the former.
6. A surge suppression assembly as claimed in claim 5, wherein the projections comprise slots of appropriate dimensions so as to allow accommodation of horizontal section in a manner to nullify vibration providing a secured and reliable joint.
7. A surge suppression assembly as claimed in claim 1, wherein supporting means comprises lateral ribs.
8. A surge suppression assembly as claimed in claim 7, wherein lateral ribs comprise resting land and flanges in a manner to encapsulate appropriate portions of vertical and horizontal sections adapted to restrict movement of the terminal means in all degrees of freedom even when the assembly is unscrewed.
9. A surge suppression assembly as claimed in claim 1, wherein the surge suppression element comprises tiny varistor.
10. A surge suppression assembly as herein substantially described and illustrated with reference to the


accompanying figures.

Dated this the 10th day of January 2007.
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ABSTRACT
TITLE : AN INNOVATIVE METHOD OF ARRANGING AN IN-BUILT SURGE
SUPPRESSOR IN A DC CONTACTOR
The present invention relates to a surge suppression assembly. The assembly comprises former (4) having plurality of guiding and supporting means (8,10), plurality of terminal means (1,2) being operatively disposed reciprocally through the guiding means (8) so as to .hold surge suppressing element (3) in a predetermined location mounted on the former (4) thereby forming closed circuit. The terminal means (1,2) comprising plurality of modular sections including plurality of horizontal and vertical sections bearing predetermined angular relationships in plural planar axes, wherein a plate section is located in a manner to operatively juxtapose with former.
Figure 1