F O R M 2

THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10; rule 13)

1. Title of the invention:
INSTRUMENT FOR IP4X TESTING

2. Applicant(s):

(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 THE INVENTION
The present invention relates to the field of testing instruments, more particularly the present invention relates to an instrument for testing IP4X standards for electrical devices.
BACKGROUND OF THE INVENTION
The numbers of products that are being brought to the market by various companies are increasing alarmingly day by day. Due to the increase rate of products, the safety standards for products are being synchronized to meet international safety and imposed upon products. And the increase in product safety standards made the manufacturers to oblige with the international safety standards.
The international safety standards for products are rated for different degree of protection and it is referred as Ingress Protection Rating but it is more commonly known as International Protection Rating. These standards are typically applied to commercial products and their ability to keep the environment from interfering with operation of the product. The international safety standard for Ingress Protection is IEC60529. This is a reference standard and this contain guiding principle to certain characteristic that may be incorporated into different types of end product. An IP code is a rating assigned to a product that indicates the level of ingress protection, which is amount of protection that the enclosure of the product provides against the entry of solid foreign objects and against moisture infiltration.
Ingress protection testing (IP testing) is to certify products resistance to intrusion or ingress by foreign particle/objects. According to standard IEC60529 ingress protection test of any product is indicated by IPXX. Where first ‘X’ stands for protection against solid particles and second ‘X’ stands for protection against liquid.
First ‘X’ stands as follows (according to table 2and 6 of IEC60529),
X=0 No protection
X=1 Protection against solid bodies larger than 50mm with 50 Newton
X=2 Protection against solid bodies larger than 12mm with 10 Newton
X=3 Protection against solid bodies larger than 2.5mm with 3 Newton
X=4 Protection against solid bodies larger than 1mm with 1 Newton
X=5 Protection against dust (limited) with 1 Newton
X=6 completely protection against dust with 1 Newton
For IP5X and IP6X we must have dust chamber. IP4X can be tested by various costly electronic instruments. By using this instrument a single person can do the IP4X. While inserting the needle with pressure of 1newton in the test sample, if the needle penetrates the test sample then the product fails the IP4X test and if not the test sample passes the IP4X test.
OBJECT OF THE INVENTION
An object of the invention is to overcome the drawbacks/disadvantages of the prior arts.
Another object of the invention is to provide an IP4X testing instrument.
SUMMARY OF THE INVENTION
In accordance with the present embodiment of the invention there is provided an instrument for testing IP4x rating of a product.
In accordance with another embodiment of the invention there is provided a testing instrument for IP4X rating of a product comprising a housing mechanism which is assembled with functional unit and it comprising a slider with a measuring scale, a needle, a spring and metallic pin.
In accordance with another embodiment of the invention there is provided a needle which transfers linear movement to slider.
In accordance with another embodiment of the invention there is provided a slider that moves inside said housing and compress the spring.
In accordance with another embodiment of the invention, the spring provided is calibrated according to measuring scale which provides the reading of pressure applied by the needle.
In accordance with yet another embodiment of the invention there is provided a metallic pin is used to assemble the slider & housing mechanism.
In accordance with yet another embodiment, the invention introduces a compact mechanism which can be used in compact modules and ensures the safety of the person working in front panel when it is in test and isolation condition.
BRIEF DESCRIPTION OF THE DRAWINGS
The following drawings are illustrative of particular examples for enabling methods of the present invention, are descriptive of some of the methods, and are not intended to limit the scope of the invention. The drawings are not to scale (unless so stated) and are intended for use in conjunction with the explanations in the following detailed description.
FIG.1 illustrates the assembly of IP4X testing instrument
FIG.2 illustrates the housing of IP4X testing instrument assembly.
FIG.3 illustrates the slider of IP4X testing instrument assembly.
Fig.4 illustrates the needle of IP4X testing instrument assembly.
FIG.5 illustrates spring of IP4X testing instrument assembly.
Fig.6 illustrates measuring scale of IP4X testing instrument assembly.
Fig.7 illustrates metal pin of IP4X testing instrument assembly.

DETAILED DESCRIPTION OF THE INVENTION
Accordingly in the present invention Fig.1 illustrate the assembly of IP4X of testing instrument (20) having a housing means (27), assembled with a functional unit comprising of a slider (23) with a measuring scale (25) a needle (21).
FIG.2 illustrates the housing means (27) in which the functional unit is assembled.
FIG.3 illustrates the slider (23) of will move inside the housing mechanism (27) and compress a spring inside housing means (27).
Fig.4 illustrates a needle (21) with one end (21a) having a diameter of 1 millimetre and other end (21b) having a diameter of 2.5 millimetre transferring linear movement to slider (23)
FIG. 5 illustrates a spring (30) positioned inside IP4X of testing instrument assembly (20) which is calibrated according to measuring scale (25).
FIG.6 illustrates a measuring scale (25) of IP4X of testing instrument assembly (20) which provides the reading of pressure applied by the needle (21).
FIG.7 illustrates a metallic pin (32) used to assemble the slider (23) and housing means (27).
IP4X of testing instrument assembly (20) comprising of Housing means (27) assembled with a functional unit comprising a slider (23). The needle (21) of the IP4X of testing instrument assembly (20) is connected with slider (23). The slider (23) also comprising of measuring scale (25) and a spring (30) connecting slider (23) and housing means (27).
The needle (21) IP4X of testing instrument assembly (20) has different diameters at both ends. One end of needle (21) is having a diameter of 1 millimetre and the other end of needle is 2.5 millimetre in diameter. The needle (21) is connected with slider (23) using the 2.5 millimetre diameter end of needle (21) and also transfer pressure properly to slider (23).
When needle (21) is pushed on surface at end (21a), due to opposition offered by the surface, needle (21) experience the force. This force is transferred by the pin (32) to the slider (23). Slider (23) will try to move inside housing (27) which will be opposed by the spring (30). The spring (30) is calibrated in such a way that it shows minimum reading of 25 gram up to 125 gram maximum on measuring scale (25) fixed on slider (23). Thus the pressure on the needle (21) will be directly read on the measuring scale (25). The metallic pin (32) is used for assembling the slider (23) and housing means (27) also to limit the movement of slider (23).
If needle (21) penetrates test sample at 100gm (1Newton) or below it as per scale then product fails the IP4X test and if not then product passes IP4X test.
Although the embodiments herein are described with various specific embodiments, it will be obvious for a person skilled in the art to practice the embodiments herein with modifications. However, all such modifications are deemed to be within the scope of the claims.
It is also to be understood that the following claims are intended to cover all of the generic and specific features of the embodiments described herein and all the statements of the scope of the embodiments which as a matter of language might be said to fall there between.

WE CLAIM
1. An instrument for testing IP4X standards of a product comprising:
a) a housing means;
b) a functional unit assembled within said housing means; and
c) said functional unit comprising atleast one needle, atleast one slider, atleast one measuring scale, atleast one spring, and atleast one metallic pin.

2) The instrument as claimed in claim 1, wherein said needle consist of two ends with different diameters.

3) The instrument as claimed in claim 2, wherein one end of said needle is about 1mm in diameter and other end of said needle is about 2.5mm in diameter.

4) The instrument as claimed in claim 1, wherein said slider is connected with said needle at said 2.5mm end.

5) The instrument as claimed in claim 1, wherein said slider comprising a measuring scale.
6) The instrument as claimed in claim 1, wherein said spring is calibrated according to measuring scale.

7) The instrument as claimed in claim 1, wherein said metallic pin assembles said slider and housing means.
8) The instrument as claimed in claim 4, wherein said measuring scale provides reading of pressure applied by needle.

9) An instrument for testing IP4X standards of a product as herein described and illustrated with reference to accompanying drawings.