Source: http://www.allindianpatents.com/patents/203602-shielding-device-for-connection-strips-in-telecommunications-and-data-engineering
Timestamp: 2018-06-18 06:03:29
Document Index: 106176478

Matched Legal Cases: ['art 13', 'art 14', 'art 13', 'art 14', 'art 13', 'art 13', 'art 14']

Indian Patents. 203602:SHIELDING DEVICE FOR CONNECTION STRIPS IN TELECOMMUNICATIONS AND DATA ENGINEERING
SHIELDING DEVICE FOR CONNECTION STRIPS IN TELECOMMUNICATIONS AND DATA ENGINEERING
A shieiding device for connection strips in telecommunications and data engineering, comprising a number of shielding plates and at least one base rail allocated to the latter, wherein the shielding plates (2) and the base rail (3) are integrally formed from a metal sheet (28), and wherein each shielding plate (2) is connected to the base rail (3) via a narrow web (4) and is arranged rotated through approximately 900 with respect to the base rail (3).
A shielding device of the generic type is already known from the connection strip disclosed in US 5,160,273. Here, the problem of crosstalk between adjacent insulation-piercing terminal contact elements of the connection strip is solved by the insertion of a multiplicity of electrically conductive , shielding plates between the individual pairs of insulation-piercing terminal contact elements. The problem of crosstalk occurs when transmitting large volumes of information via electrical lines, the information being transmitted at high frequencies. Transmitting at high frequencies produces radiation and interference between adjacent lines, particularly when these lines are arranged close beside one another in the connection strip. Electrically conductive shielding plates are inserted between a pair of insulation-piercing terminal contact elements, the spacing between, two adjacent pairs of insulation-piercing terminal contact elements being larger than the spacing between adjacent insulation-piercing terminal contact elements in a pair. The shielding plates are in this case inserted between pairs of insulation-piercing terminal contact elements in slots which extend transversely to the longitudinal direction of the plastic body of the connection strip, and contact the base rail situated in the longitudinal direction inside the plastic body. A disadvantage of this is that, when fitting the component into the plastic body, it is first necessary to fit the base rail, which has contact tongues for
contacting the individual shielding plates, and that it is subsequently necessary to push the individual shielding plates into the connection strip. Consequently, the complexity of assembly is relatively high in order to provide the connection strip with the shielding device for high transmission rates in telecommunications and data engineering.
To achieve this object, the invention provides for the shielding plates and the base rail to be, integrally formed from a metal sheet, and for each shielding plate to be connected to the base rail via a narrow web and arranged rotated through approximately 90° with respect to the base rail. For the purposes of the invention, a metal sheet may be either a solid metal sheet or a metallized plastic band or the like. The shielding device according to the invention thus forms an integral component which is made of metallic material and which, during assembly of a connection strip for telecommunications and data engineering, is inserted ,into the plastic housing of the connection strip with its base rail, and its shielding plates, which are integrally connected to the base rail, are guided into all the preformed slots inside the connection strip at the same time. This simplifies assembly considerably.
In a further embodiment of the invention, the spacings between the shielding plates on a base rail may be designed to be- different from one another. This enables a shielding plate to be matched to dif ferenjD applications.
The invention also relates to a method of producing' the shielding device in accordance with patent claim 3, to a connection strip for the shielding device in accordance with patent claim 5, and finally to the uSe of the shielding device inside a connection strip in accordance with claim 6.
The invention is explained in more detail below with the aid of an exemplary embodiment of a shielding device which can be fitted, or is fitted, into a connection strip for telecommunications and data engineering. This exemplary .embodiment is illustrated in more detail in the^drawings, in which: Figure 1 shows a perspective illustration of the
shielding device. Figure 2 shows a front view, Figure 3 shows a plan view, Figure 4 shows a plan view of a metal sheet having
punched-out shielding plates and the base
rail. Figure 5 shows an illustration, corresponding to
Figure 4, of a part of the shielding device
having a folded base rail, Figure 6 shows a side view of a connection strip. Figure 7 shows a cross section along the line A-A in
Figure 6, Figure 8 shows a plan view of the connection strip
shown in Figure 6, and Figure 9 shows a cross section along the line B-B in _
Figure 8. In the exemplary embodiment, the shielding device 1 comprises seven flat, essentially U-shaped shielding plates 2, a base rail 3 and seven connection . webs 4, which connect the individual shielding plates 2 to the base rail 3. The shielding device 1 is made of conductive metallic material and is integrally formed, in particular punched, with the shielding plates 2, the base rail 3, and the connection webs 4, from a metal sheet 28, particularly copper, copper alloys, steel or. aluminum, the shielding plates 2 and the base rail 3 with the connection webs 4 initially lying in the same plane as the metal sheet 28. In a work step which follows the cutting-out process, the individual shielding plates 2 are rotated in the region of their connection webs 4 through 90° with respect to the base rail 3. A hole 5 in the base rail 3 is. associated with
each shielding plate 2 close to the connection web 4, and this hole 5 is used for adjustment during the production process. The metal sheet 28 may also be a metallized plastic band or the like.
In the view of how the shielding device 1- is processed, shown in Figure 4, the individual shielding plates 2 are of U-shaped design, a roughly rectangular shielding panel 6 adjoining the connection web 4 and being provided with two prong-like shielding forks 7 at the end remote from the connection web 4. These shielding forks 7 are stepped by means of a shoulder 8 which tapers the cross section so that they are matched to the internal cross section of the connection strip 11.
Figure 4 shows the metal sheet 28 with cut-out or punched-out shielding plates 2 of width B with a mean spacing X between one another and with the cut-out or punched-out base rail 3 with the holes 5 which are used for adjustment during production. The length of the metal sheet 2 8 corresponds to the number of shielding plates 2 of width B plus the cut gaps.
Figure 5 shows the shielding plates 2 which are rotated through 900 with respect to the base rail 3 and are normally at a distance X from one another. To achieve a shorter distance X', a fold 9 is introduced into the base web [sic] 3, as shown in Figure 8.
The shielding device 1 is used for shielding the individual insulation-piercing terminal contact elements 10 inside a connection strip 11 for high transmission rates in telecommunications and data engineering. Such a connection strip 11 having a plurality of insulation-piercing terminal contact elements 10 arranged in - pairs is illustrated and described in more detail in DE 43 25 952 C2 . The connection strip 11 is illustrated in Figures 6 to 9 and is described in more detail below with respect to the shielding device 1 used.
The connection strip 11 comprises a plastic housing 12 made of an upper part 13 and a lower part 14
which are latched to one another by means of latching openings 15 in the upper part 13 and latching lugs 16 in the lower part 14 . Terminal slots 17 are formed in the upper part 13 and have integrally formed terminal lugs 18 and terminal webs 19 which serve to hold the insulation-piercing terminal contact elements 10. The latter are formed from sheet-like flat material and comprise two contact webs 21 enclosing a contact slot 20 between them. A base web 22 is adjoined by contapt fingers 23 which merge into spring contacts 24 . Two pairs of in'sulation-piercing terminal contact elements 10 are respectively arranged close beside one another, the spacing D between two adjacent pairs of insulation-piercing terminal contact elements 10 being considerably larger than the spacing d between insulation-piercing terminal contact elements 10 which are close beside one another, as can be seen in Figure 6. The individual shielding plates 2 of the shielding device 1 are inserted into the total of seven wider cross-sectional regions 25 of the connection strip 11, as shown by dashed lines in Figures 6 and 7 and by solid lines in Figures 8 and 9.
To insert the base rail 3 with. the individual shielding plates 2 into the housing 12 of the connection strip 11, the upper part 13 in the exemplary embodiment contains seven chambers 2 6 with respective transverse slots 27 into which the individual shielding plates 2 are pushed. The base rail 3 is situated in a longitudinal slot 21 in the bottom region of the lower part 14, as shown in Figures 7 and 9. The shielding panels 6 and shielding forks 7, which adjoin the latter, of the individual shielding plates 2 essentially take up the whole of the cross section of the interior of the connection strip 11, as shown in Figure 9 in particular, and thus separate the individual pairs of insulation-piercing terminal contact elements 10 in such a manner that greater crosstalk attenuation is achieved for high transmission rates as a result of the electrically conductive
shielding plates 2. The use of the large-area electrically conductive shielding plates 2 in the connection strip 11 does not require the physical volume of the connection strip to be enlarged, nor any greater expense to produce it.
For a HIGHBAND 8 connection strip 11, the standard spacing X between- the shielding plates 2 is X = 12.6 mm. However, for a HIGHBAND 10 connection strip 11, for example, the spacing is X' = 9.6 mm. For this, the folds 9 are introduced into the base rail 3 between each of the individual shielding plates 2. This spacing cannot be achieved by directly punching the shielding device 1 out of a metal sheet 28, since the
width B of the individual shielding plate 2 needs to be around 12 mm on account of the width of the connection strip 11. Hence, for a HIGHBAND 8 connection strip 11, the dimensions width B = 12.6 mm and spacing X 12.6 mm complement one another well. For a narrower spacing X' , however, folds 9 are necessary; these may be replaced by any other kind of means for shortening the length of the base rail 3.
LIST OF REFSREHCE NUMERALS
1.	A shielding device for connection strips in
telecommunications and data engineering, comprising a
number of shielding plates and at least one base rail
allocated to the latter, wherein the shielding plates
(2) and the base rail (3) are integrally formed from a
metal sheet (28), and wherein each shielding plate (2) is connected to the base rail (3) via a narrow web (4). and is arranged rotated through approximately 90° with respect to the base rail (3).
2.	The shielding device as claimed in claim 1, wherein the spacings (X, X') between the shielding plates (2) can be designed differently, particularly by means of folds (9) in the base rail (3).
3.	A method of producing a shielding device for connection strips in telecommunications and data engineering as claimed in claim 1 or 2, wherein a number of shielding plates {2) and a base rail (3) supporting the latter, as well as webs (4) connecting the shielding plates (2) to the base rail (3) , are integrally formed from a metal sheet (28), and the shielding plates (2) are subsequently rotated in the region of the webs (4) through approximately 90° with respect to the base rail (3).
4.	The method as claimed in [sic] as claimed in claim 3, wherein the spacings (X, X' ) between the shielding plates , (2) can be designed differently, particularly by means of folds (9) in the base rail (3).
5.	A connection strip for telecommunications and data engineering, having insulation-piercing terminal contact elements arranged in a plastic housing, and shielding plates arranged between said insulation-piercing terminal contact elements, and at least one ground rail allocated to said shielding plates, wherein the shielding plates' (2) and the base rai 1 (3) are integrally formed from a metal sheet (28), and wherein
each shielding plate (2) is connected to the base rail (3) via a narrow web (4) and is arranged rotated through 90° with respect to the base rail (3).
IN/PCT/2001/0522/KOL
BEESKOWDAMM 3-11, D-14167 BERLIN
1 BIPPUS HANS-DIETER 5973 WATTLE TREE ROAD, HOLGATE,NSW 23
2 NICHOLLS BRYCE LINDSAY 12 GIFT AVENUE ,AVOCA BEACH ,NSW 22
H 01 B 13/658
PCT/EP99/07756
1 19853837.5 1998-11-23 Germany