FORM 2
THE PATENTS ACT, 1970
COMPLETE SPECIFICATION
(See Section 10)
FINGER PROOF CONTACT SYSTEM FOR DRAW OUT TYPE
ASSEMBLY
Numbered as dated
INVENTORS:
a) PANKAJ SUBHASH POTDAR
b) TUSHAR N SHAH
APPLICANT:
M/s. LARSEN & TOUBRO LIMITED
L&T House, Ballard Estate, P.O. Box No 278,
Mumbai, 400 001, Maharashtra,
INDIA


FINGER PROOF CONTACT SYSTEM FOR DRAW OUT TYPE
ASSEMBLY
A) TECHNICAL FIELD
[0001] The present invention generally relates to a switch gear assembly such as circuit breaker assembly and particularly to a draw out type circuit breaker assembly. The present invention more particularly relates to a contact system for the draw out type circuit breaker assembly.
B) BACKGROUND OF THE INVENTION
[0002] A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from a damage caused by an electrical overload or short circuit. Unlike a fuse which is operated once only and has to be replaced after a single use, a circuit breaker can be reset (either manually or automatically) to resume normal operation. The Circuit breakers are made in varying sizes, from small devices that protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.
[0003] A contactor is an electrically controlled switch (relay) used for switching a power circuit. A contactor is activated by a control input which is a lower voltage / current than that which the contactor is switching. The Contactors are made in many forms with varying capacities and features.


[0004] The Electrical switches, more particularly circuit breakers or contactors, are sometimes of the draw-out type. The draw out type switches or circuit breakers has a fixed frame containing the contacts indicating the connected or disconnected position, and also a possible intermediate test position of the apparatus.
[0005] The Industrial-rated draw-out type circuit breakers include a pair of connectors (usually male) for each pole on one side of the breaker housing for electrically connecting the draw-out type circuit breaker to a compartment or housing. The housing includes load and line straps for each pole so that the draw out type circuit breaker is connected to a power distribution circuit. This configuration allows the circuit breaker to be quickly and easily removed or replaced. The circuit breaker includes movable and fixed contacts for opening and closing the distribution circuit. The contacts should be kept open for safety reasons, when the draw out type circuit breaker is inserted or removed.
[0006] The US Patent number 4017698 issued to Kuhn et al, discloses a draw out type circuit interrupter in which the an automatic circuit breaker in a draw out unit is removably mounted with in an enclosure. A levering mechanism is provided to pull out the draw out unit on the rails to permit the complete disengagement of the circuit breaker from the load and line terminals.
[0007] The US Patent number 5176529 issued to Heinz discloses a coupling device for current control lines in a low voltage switchboard. The device has two multipoint plugs and sockets arrangement. The plugs are connected to a mounting rack while the sockets


are provided on a limited path so that both the plugs and the sockets are coupled together, when the rack is inserted.
[0008] The US patent number 6806424 issued to Gerving discloses a connecting terminal for a switching device. The connecting terminal is provided with a spring connector clamp fitted in a module that is secured in a retention shaft of the connector clamp.
[0009] The US patent number 5594221 issued to Drumbor discloses a high ampere-circuit breaker secondary disconnect arrangement. The secondary disconnect assembly for high ampere-circuit breaker has plug containing upwardly stepped connector terminal arrays which mate with upwardly stepped stab terminal arrays of secondary receptacle.
[0010] Thus none of the currently available draw out type switching contact assembly is provided with two different contact arrangements.
[0011] Hence there is a need to develop an electrical switching contact assembly to accommodate different types of contact arrangement in the same housing. Also there is a need to reduce the assembly time and to reduce the size of the switching contact assembly. Further there is a need to develop a switching contact assembly with built in IP 20 protection. There is yet another need to develop a switching contact assembly provided with a unique design for the contact to generate optimum contact pressure.


C) OBJECTS OF THE INVENTION
[0012] The primary object of the present invention is to develop a switching contact assembly provided with a single housing to accommodate two different types of contact arrangement to provide a compact assembly structure.
[0013] Another object of the present invention is to develop a switching contact assembly provided with a click fit arrangement in each housing to reduce the assembly time for making a stack of the assemblies.
[0014] Yet another object of the invention is to develop a switching contact assembly provided with a built in IP 20 protection.
[0015] Yet another object of the present invention is to develop a switching contact assembly provided with a unique design for the contacts to generate optimum contact pressure without the use of an external spring.
[0016] Yet another object of the present invention is to develop a switching contact assembly in which the contacts are assembled without using any tools or hardware.
[0017] Yet another object of the present invention is to develop the contacts that are suitable for the draw out type switching contact assembly.


[0018] Yet another object of the present invention is to develop a switching contact assembly with a compact contact structure thereby providing sufficient space to accommodate plurality of auxiliary electrical contacts.
[0019] Yet another object of the present invention is to develop an electrical contact system that is compatible with any draw out type module and switching devices.
[0020] Yet another object of the invention is to develop a switching contact assembly in which the control cables are terminated easily in the contacts.
[0021] These and other objects and advantages of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.
D) SUMMARY OF THE INVENTION
[0022] The abovementioned shortcomings, disadvantages and problems are addressed herein and which will be understood by reading and studying the following specification.
[0023] The various embodiments of the present invention provide an electrical contact system with contacts having unique design for draw out type switching contact assembly. According to one embodiment of the present invention, a draw out type switching contact assembly has a male contact assembly and a female contact assembly. The male contact assembly is movably connected to a female contact assembly to establish an


electrical connection. Each contact assembly has a respective unique sliding contact system which gives the required contact pressure without using a spring, due to the unique structure. The contact system has inbuilt IP 20 protection. The contact system is made compact by arranging two contact elements at the same horizontal level thereby saving space and reducing the size. The control cables are terminated at the contact elements easily by using a simple screw clamping arrangement. The contact system is provided with a position locator and a click fit arrangement to stack two contact assemblies easily. When one assembly is pressed over another assembly, both the assemblies are stacked and connected together by the click fit mechanism.
[0024] The male contact assembly is formed by arranging two male contacts on a housing and fixing the male contacts with the housing. The two male contacts have mutually different sizes. Each male contact has an elongated horizontal arm and a vertical arm. The vertical arm is arranged perpendicular to the horizontal arm and fixed to one end of the horizontal arm through a u-shaped bent/ boat structure. The other end of the vertical arm is provided with a bent surface having a through hole for receiving the screws that are used for fastening the male contacts with the housing and for holding the wire logs. The bent surfaces in the two male contacts are inclined at mutually different angles along mutually different directions. The upper portion of the housing has two grooves separated by a protruded guide portion to receive both the two male contacts respectively. Each assembly is provided with a position locator and click fit structure to stack two assemblies together easily and reliably. The click fit structure includes a click fit projection and a slot for click fit so that the click fit projection of one assembly is fit into the click fit slot provided in another assembly and both the


assemblies are stacked together easily. A male position guide and a female position guide are provided in each assembly so that the male position guide of one assembly is inserted into the female position guide of the another assembly to enable the blind mating of the contact assemblies during the stacking process of multiple assembly units. The wiring of each assembly is performed by inserting the wire lugs into the openings provided in the contact elements.
[0025] A female contact assembly has two female contacts arranged on a housing. The two female contact elements are of mutually different lengths. Each female contact element is arranged in a L shaped structure. A hole for receiving a screw used for holding a wire lug is provided at one end of the female contact element while the other end is provided with two semi circular cuts. Each assembly is provided with a position locator and click fit structure to stack two assemblies together easily and reliably. The click fit structure includes a click fit projection and a slot for click fit so that the click fit projection of one assembly is fit into the click fit slot provided in another assembly and both the assemblies are stacked together easily. A male position guide and a female position guide are provided in each assembly so that the male position guide of one assembly is inserted into the female position guide of the another assembly to enable the blind mating of the contact assemblies during the stacking process of multiple assembly units. The wiring of each assembly is performed by inserting the wire lugs into the openings provided in the contact elements.
[0026] Both the male contact assembly and the female contact assembly are couple together form a contact assembly system. When the male contact assembly is moved to


contact the female contact assembly, both the male and the female contact assemblies are come in contact with each other to establish an electrical connection.
[0027] Thus the various embodiments of the present invention provide a finger proof contact system for a circuit breaker device. The contact system has a finger proof design structure. Two contact systems are arranged in a horizontal plane thereby reducing the size of the contact system to half. The assembly of die contact elements and the contact assemblies are simplified by using die position indicators and the quick fit mechanism thereby eliminating the need for springs and reducing the assembly time. The finger proof contact system may be fitted along with all types of draw out types of modules and switching devices.
[0028] These and other objects and advantages of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.
E) BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The other objects, features and advantages will occur to those skilled in the art from the following description of the preferred embodiment and the accompanying drawings in which:
[0030] FIGURE.l illustrates a top perspective view of a finger proof contact system according to one embodiment of present invention.


[0031] FIGURE.2 illustrates an exploded top perspective view of a male contact assembly in a finger proof contact system according to one embodiment of present invention.
[0032] FIGURE.3 illustrates a top perspective view of a male contact assembly in a finger proof contact system according to one embodiment of present invention.
[0033] FIGURE.4 illustrates a bottom perspective view of a male contact assembly in a finger proof contact system according to one embodiment of present invention.
[0034] FIGURE.5 illustrates a top exploded perspective view of an assembled male contact assembly in a stack in a finger proof contact system according to one embodiment of present invention.
[0035] FIGURE.6 illustrates a top exploded perspective view of a female contact assembly in a finger proof contact system according to one embodiment of present invention.
[0036] FIGURE.7 illustrates a top perspective view of a housing in a female contact assembly in a finger proof contact system according to one embodiment of present invention.


[0037] FIGURE.8 illustrates a top perspective view of a housing in a female contact assembly in a finger proof contact system according to one embodiment of present invention.
[0038] FIGURE.9 frustrates a top perspective view of a contact element in a male contact assembly in a finger proof contact system according to one embodiment of present invention.
[0039] FIGURE.10 illustrates a top perspective view of a contact element in a female contact assembly in a finger proof contact system according to one embodiment of present invention.
[0040] Although specific features of the present invention are shown in some drawings and not in others. This is done for convenience only as each feature may be combined with any or all of the other features in accordance with the present invention.
F) DETAILED DESCRIPTION OF THE INVENTION
[0041] In the following detailed description, reference is made to the accompanying drawings that form a part hereof, and in which the specific embodiments that may be practiced is shown by way of illustration. These embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and it is to be understood that the logical, mechanical and other changes may be made without


departing from the scope of die embodiments. The following detailed description is therefore not to be taken in a limiting sense.
[0042] The various embodiments of the present invention provide an electrical contact system with contacts having unique design for draw out type switching contact assembly. According to one embodiment of the present invention, a draw out type switching contact assembly has a male contact assembly and a female contact assembly. The male contact assembly is movably connected to a female contact assembly to establish an electrical connection. Each contact assembly has a respective unique sliding contact system which gives the required contact pressure without using a spring, due to the unique structure. The contact system has inbuilt IP 20 protection. The contact system is made compact by arranging two contact elements at the same horizontal level thereby saving space and reducing the size. The control cables are terminated at the contact elements easily by using a simple screw clamping arrangement. The contact system is provided with a position locator and a click fit arrangement to stack two contact assemblies easily. When one assembly is pressed over another assembly, both the assemblies are stacked and connected together by the click fit mechanism.
[0043] The male contact assembly is formed by arranging two male contacts on a housing and fixing the male contacts with the housing. The two male contacts have mutually different sizes. Each male contact has an elongated horizontal arm and a vertical arm. The vertical arm is arranged perpendicular to the horizontal arm and fixed to one end of the horizontal arm through a u-shaped bent/ boat structure. The other end of the vertical arm is provided with a bent surface having a through hole for


receiving the screws that are used for fastening the male contacts with the housing and for holding the wire> logs. The bent surfaces in the two male contacts are inclined at mutually different angles along mutually different directions. The upper portion of the housing has two grooves separated by a protruded guide portion to receive both the two male contacts respectively. Each assembly is provided with a position locator and click fit structure to stack two assemblies together easily and reliably. The click fit structure includes a click fit projection and a slot for click fit so that the click fit projection of one assembly is fit into the click fit slot provided in another assembly and both the assemblies are stacked together easily. A male position guide and a female position guide are provided in each assembly so that the male position guide of one assembly is inserted into the female position guide of the another assembly to enable the blind mating of the contact assemblies during the stacking process of multiple assembly units. The wiring of each assembly is performed by inserting the wire lugs into the openings provided in the contact elements.
[0044] A female contact assembly has two female contacts arranged on a housing. The two female contact elements are of mutually different lengths. Each female contact element is arranged in a L shaped structure. A hole for receiving a screw used for holding a wire lug is provided at one end of the female contact element while the other end is provided with two semi circular cuts. Each assembly is provided with a position locator and click fit structure to stack two assemblies together easily and reliably. The click fit structure includes a click fit projection and a slot for click fit so that the click fit projection of one assembly is fit into the click fit slot provided in another assembly and both the assemblies are stacked together easily. A male position guide and a female


position guide are provided in each assembly so that the male position guide of one assembly is inserted into the female position guide of the another assembly to enable the blind mating of the contact assemblies during die stacking process of multiple assembly units. The wiring of each assembly is performed by inserting the wire lugs into the openings provided in the contact elements.
[0045] Both the male contact assembly and the female contact assembly are couple together form a contact assembly system. When die male contact assembly is moved to contact the female contact assembly, both die male and the female contact assemblies are come in contact with each other to establish an electrical connection.
[0046] The FIG.l illustrates a top perspective view of a finger proof contact system according to one embodiment of present invention. With respect to FIG.l, the electrical contact system has two contact assemblies arranged in a horizontal plane. The two contact assemblies are a male contact assembly 1 and a female contact assembly 2. Pluralities of male contact assemblies 1 are stacked together using a position locator and a quick fit mechanism. Similarly pluralities of female contact assemblies 2 are stacked together using a position locator and a quick fit mechanism. The male contact assembly 1 is moved with respect to the female contact assembly 2 to establish an electrical connection.
[0047] Each contact assembly 1, 2 has a respective unique sliding contact system which gives the required contact pressure without using a spring, due to the unique structure. The contact system has inbuilt IP 20 protection. The contact system is made compact by


arranging two contact elements at the same horizontal level thereby saving space and reducing the size. The control cables are terminated at the contact elements easily by using a simple screw clamping arrangement. The contact system is provided with a position locator and a click fit arrangement to stack two contact assemblies easily. When one assembly is pressed over another assembly, both the assemblies are stacked and connected together by the click fit mechanism. Each contact assembly is provided with a mounting projection to assemble a male contact assembly with a female contact assembly.
[0048] The FIGS. 2-5 show a perspective view of a male contact assembly in a finger proof contact system. With respect to FIGS. 2-5, The male contact assembly is formed by arranging two male contacts 1A, IB on a housing 1C and fixing the male contacts 1A, IB with the housing 1C. The two male contacts 1A, IB have mutually different sizes. Each male contact 1A, IB has an elongated horizontal arm and a vertical arm. The vertical arm is arranged perpendicular to the horizontal arm and fixed to one end of the horizontal arm through a u-shaped bent/ boat structure. The other end of the vertical arm is provided with a bent surface having a through hole for receiving the screws ID that are used for fastening the male contacts 1A, IB with the housing 1C and for holding the wire logs. The bent surfaces in the two male contacts 1A,1B are inclined at mutually different angles along mutually different directions. The upper portion of the housing 1C has two grooves separated by a protruded guide portion to receive both the two male contacts 1A,1B respectively.


[0049] Each assembly is provided with a position locator and click fit structure to stack two assemblies together easily and reliably. The click fit structure includes a click fit projection IH, IK and a slot IM for click fit so that the click fit projection 1H,1K of one assembly is fit into the click fit slot IM provided in another assembly and both the assemblies are stacked together easily. A male position guide 1G and a female position guide IF are provided in each assembly so that the male position guide 1G of one assembly is inserted into the female position guide IF of the another assembly to enable the blind mating of the contact assemblies during the stacking process of multiple assembly units. The wiring of each assembly is performed by inserting the wire lugs into the openings provided in the contact elements. Each hosing has mounting projections IN for engaging the housings of two contact assemblies together.
[0050] The FIGS. 6,7 and 8 show a perspective view of a female contact assembly in a finger proof contact system. With respect to FIGS. 6-8, a female contact assembly has two female contacts 2A,2B arranged on housing 2D. The two female contact elements 2A, 2B are of mutually different lengths. Each female contact element 2A, 2B is arranged in an L shaped structure. A hole for receiving a screw 2C used for holding a wire lug is provided at one end of the female contact element 2A,2B while the other end is provided with two semi circular cuts 3C(FIG.10). Each assembly is provided with a position locator and click fit structure to stack two assemblies together easily and reliably. The click fit structure includes a click fit projection 2H, 2K and a slot 2M for click fit so that the click fit protection 2H, 2K of one assembly is fit into the click fit slot 2M provided in another assembly and both the assemblies are stacked together easily. A male position guide 2G and a female position guide 2F are provided in each assembly so


that the male position guide 2G of one assembly is inserted into the female position guide 2F of the another assembly to enable the blind mating of the contact assemblies during the stacking process of multiple assembly units. The wiring of each assembly is performed by inserting the wire lugs into the openings provided in the contact elements. Each housing 2D is provided with mounting projections 2N for engaging with the housing of another assembly.
[0051] The FIG.9 illustrates a top perspective view of a contact element in a male contact assembly in a finger proof contact system according to one embodiment of present invention. The male contact assembly has two male contact elements. Each male contact has an elongated horizontal arm and a vertical arm. The vertical arm is arranged perpendicular to the horizontal arm and fixed to one end of the horizontal arm through a u-shaped bent/ boat structure 3A. The other end of the vertical arm is provided with a bent surface 3B having a through hole for receiving the screws that are used for fastening the male contacts with the housing and for holding the wire logs. The bent surfaces 3B in the two male contacts are inclined at mutually different angles along mutually different directions.
[0052] FIGURE.10 illustrates a top perspective view of a contact element in a female contact assembly in a finger proof contact system according to one embodiment of present invention. A female contact assembly has two female contacts arranged on a housing. The two female contact elements are of mutually different lengths. Each female contact element is arranged in a L shaped structure. A hole for receiving a screw used for holding a wire lug is provided at one end of the female contact element while the other end is provided with two semi circular cuts 3C.


[0053] Thus the various embodiments of the present invention provide a finger proof contact system for draw out type assemblies in an electrical switching device like circuit breaker to provide required contact pressure without using a spring element. The system has a male contact assembly and a female contact assembly arranged and aligned in a horizontal plane thereby saving space and reducing the size of the device. Each assembly has a unique sliding contact system to provide required contact pressure without requiring a spring. The contact system has inbuilt IP 20 protection. The contact system has inbuilt facility to take care of any vertical tolerances thereby eliminating the need for a guiding system. The contact system uses position locator and a click fit mechanism to stack any number of contacts easily and efficiently.
G) ADVANTAGES OF THE INVENTION
[0054] The various embodiments of the present invention provide a finger proof contact system for draw out type assemblies in an electrical switching device like circuit breaker, etc. the system has a single housing to accommodate two different contact arrangements thereby simplifying the size and structure of the device and making the assembly more compact. A Click fit mechanism is provided in each housing to reduce the assembly time for making the stacks of female and male contact assemblies. The Position guides are provided to facilitate proper insertion of the different housing assembly units in a stack. The mounting projections are provided in housing for easy assembly on metal structure. Several openings are provided in housing so that lugs can be inserted and clamped to the housing using screws. The Dips are provided in the housing to accommodate the contact elements. The total contact assembly has in built IP 20 protection. The bends are


provided in the male and female contact elements to give an extra strength and rigidity to thin contact material. The contact elements have a boat shaped structure so that the contact elements may be inserted easily. The boat shaped structure further facilitates the guiding and the mounting of the contact elements inside housing. The contacts are assembled in the housing without use of any tools / hardware. The rigid bent surface of the contact will reduce the pressure exerted by external lugs and cables. The planar surface acts as a sliding electrical contact. Two numbers of semi-circular shapes are provided in the contact elements to absorb the vertical tolerance of ±2 mm. The unique semicircular structure in the female contact element enables the easy insertion and guiding of male contact in a draw out type assembly. An optimum contact pressure is generated without use of any kind of external spring by employing a contact elements with a unique contact design.
[0055] Although the invention is described with various specific embodiments, it will be obvious for a person skilled in the art to practice the invention with modifications. However, all such modifications are deemed to be within the scope of the claims.
[0056] It is also to be understood that the following claims are intended to cover all of the generic and specific features of the present invention described herein and all the statements of the scope of the invention which as a matter of language might be said to fall there between.


CLAIMS
WHAT IS CLAIMED IS:
1. A finger proof contact system for draw out type assembly in electrical switching
device, the system comprising:
Two contact assemblies arranged to move in a horizontal plane;
Wherein each contact assembly includes a sliding contact system and a unique structure to give required contact pressure.
2. The system according to claim 1, wherein the unique structure includes a quick fit mechanism and a position locator to stack pluralities of contact assemblies.
3. The system according to claim 1, wherein the two contact assemblies includes a male contact assembly and a female contact assembly.
4. The system according to claim 3, wherein the male contact assembly is moved with respect to the female contact assembly to establish an electrical connection.
5. The system according to claim 3, wherein the male contact assembly includes two male contact elements,
quick fit mechanism,


position locator and housing.
6. The system according to claim 5, wherein the two male contact elements have a unique structure.
7. The system according to claim 6, wherein each male contact element has two elongated arms arranged at mutually perpendicular directions to each other.
8. The system according to claim 7, wherein the two arms in the male contact element are connected together through a boat shaped structure.
9. The system according to claim 6, wherein each contact element has a bent surface at the end portion.
10. The system according to claim 9, wherein the bent surfaces in both the male contact elements are inclined at mutually opposite directions.
11. The system according to claim 9, wherein the bent surface in the male contact element has a hole to receive the screws used for holding a wire lug in the contact element.
12. The system according to claim 6, wherein the two male contact elements have mutually different length and size.


13. The system according to claim 5, wherein the housing has a dip to receive the
male contact elements.
14. The system according to claim 5, wherein the quick fit mechanism is provided in
the housing two connect two contact assemblies together in a stack without
requiring a spring.
15. The system according to claim 5, wherein the quick fit mechanism includes a
quick fit projection and a quick fit slot provided in two different surfaces of the
housing so that the quick fit projection in one assembly is inserted into the quick
fit slot of another assembly to connect both the assemblies together in an
assembly stack without requiring a spring.
16. The system according to claim 5, wherein a position locator is provided in the housing of each contact assembly to enable the coupling of two contact assemblies in the assembly stack.
17. The system according to claim 16, wherein the position locator comprises a male position guide and a female position guide provide at two different surfaces of each contact assembly so that the female position guide in one contact assembly is mated with the male position guide in another assembly to couple both the assemblies together in the stack.
18. The system according to claim 5, wherein the housing has mounting projections to assemble the male contact assembly and the female contact assembly easily.
22

19. The system according to claim 5, the housing has a dip to receive the contact
elements.
20. The system according to claim 3, wherein the female contact assembly includes
two female contact elements,
quick fit mechanism, position locator and housing.
21. The system according to claim 20, wherein the two female contact elements have a unique structure.
22. The system according to claim 21, wherein each female contact element has two elongated arms arranged at mutually perpendicular directions to each other.
23. The system according to claim 21, wherein each female contact element has a bent surface at the end portion.
24. The system according to claim 23, wherein the bent surface in the female contact element has a hole to receive the screws used for holding a wire lug in the contact element.
25. The system according to claim 21, wherein the two female contact elements
have mutually different length and size.


26. The system according to claim 21, wherein each female contact element is formed with two semicircular cuts at another end
27. The system according to claim 20, wherein the housing has a dip to receive the female contact elements.
28. The system according to claim 20, wherein the quick fit mechanism is provided
in the housing two connect two contact assemblies together in a stack without
requiring a spring.
29. The system according to claim 20, wherein the quick fit mechanism includes a
quick fit projection and a quick fit slot provided in two different surfaces of the
housing so that the quick fit projection in one assembly is inserted into the quick
fit slot of another assembly to connect both the assemblies together in an
assembly stack without requiring a spring.
30. The system according to claim 20, wherein a position locator is provided in the housing of each contact assembly to enable the coupling of two contact assemblies in the assembly stack.
31. The system according to claim 20, wherein the position locator comprises a male position guide and a female position guide provide at two different surfaces of each contact assembly so that the female position guide in one contact


assembly is mated with the male position guide in another assembly to couple both the assemblies together in the stack.
32. The system according to claim 20, wherein the housing has mounting projections to assemble the male contact assembly and the female contact assembly easily.
33. The system according to claim 20, the housing has a dip to receive the contact elements.

To,
The Controller of Patents,
The Patent office,
At Mumbai


ABSTRACT
The embodiments of the present invention provide a contact system arranged with male and female contact assemblies on a horizontal plane. The male contact assembly is moved with respect to the female contact assembly to establish an electrical connection. Pluralities of each type of assemblies are stacked together using a quick fit mechanism and a position locator. Each contact element has a unique structure to provide uniform contact pressure without requiring a spring.
33 Claims, 10 Drawings.