Electrical connectors – With vitreous-type envelope – Having bayonet-coupling contact
Patent
1997-10-17
1999-12-28
Stephan, Steven L.
Electrical connectors
With vitreous-type envelope
Having bayonet-coupling contact
H01R 903
Patent
active
060073837
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a rear mounting device for an electrical connector for a shielded cable.
More precisely, the present invention relates to the piece in an electrical connector referred to as a "rear mount" and that serves in particular to take up the shielding of the electrical cable.
Shielded wire links are used wherever electro-magnetic problems may be encountered. The designer of an electrical installation must therefore define an electrical link with specified shielding performance complying with civilian or military standards. All of the elements comprising the electrical link must therefore be specified. Thus, the cable constituting the link must have shielding presenting defined values, and the connector portion must also have the corresponding required characteristics. The connector portion comprises two main portions: the special connector proper which satisfies well-specified standards, and the mounting portion made up of a "rear accessory" having at one of its ends a fitting capable of being mounted on the connector proper and at its other end a fitting capable of taking up the general shielding of the cable together with any shielding that there may be of the component elements of the cable.
Two well-known main techniques already exist for mounting the connector on the cable. Accompanying FIG. 1 shows the connector proper 10, the cable 12 with its shielding braid 14 and its main electrical conductors 16. In this implementation, the rear mounting device 18 is of large diameter so that the rear mount 18 can be moved away from the connector 10 by sliding along the cable 12, thereby leaving enough room to wire the electrical conductors 16 to the connector under good conditions. After the wiring has been done, the rear mount 18 is put into place on the connector 10 and the shielding braid 14 must be crimped to the shielding take-up portion 20. However, given the large diameter of the shielding take-up portion 20, the braid 14 must be deformed mechanically in order to increase its diameter to the diameter of the shielding take-up tube. Such a solution allows wiring to be performed under good conditions and therefore at relatively low cost, however it is unsuitable when the shielding needs to comply with tight conditions, specifically those relating to taking up the shielding braid on the rear mount.
The other solution consists in providing a tube or sleeve for taking up the shielding 22 having an outside diameter that is substantially equal to the diameter of the shielding braid 24. However, it will be understood that under such circumstances, it is not possible to cause the rear accessory of the connector to slide along the entire cable to make room for effecting the wiring. The problem in such a system is thus that the space available for wiring the primary conductor elements to the connector proper is very small.
Such difficult conditions for wiring the primary elements on the connector considerably increase the cost of this operation, due essentially to the increase in time required to perform the wiring, and in addition such conditions run the risk of leading to damage to certain primary conductor elements, thus making the wiring unreliable.
To remedy those drawbacks, various other solutions have been proposed. U.S. Pat. Nos. 4,111,513, 3,944,317, and 4,671,598 describe various solutions which attempt to resolve the above-mentioned problem. Nevertheless, those solutions lead to connectors that are relatively complex and their mounting operations remain relatively lengthy.
The object of the present invention is to provide a rear mounting device for an electrical connector for a shielded cable making it possible simultaneously to take up the shielding in compliance with the specific standards that are in force while also enabling wiring operations to be performed on the primary electrical conductors under good conditions.
According to the invention, this object is achieved by a rear mounting device for a connector for a shielded cable including an outer sheath, one or more shieldin
REFERENCES:
patent: 3889046 (1975-06-01), Oberdiear
patent: 4921449 (1990-05-01), Fish
patent: 5417587 (1995-05-01), Katsuda et al.
patent: 5536185 (1996-07-01), Guiol
Axo'n Cable S.A.
Byrd Eugene G.
Stephan Steven L.
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