Electrical connectors – Contact comprising cutter – Insulation cutter
Patent
1996-05-30
1998-06-09
Paumen, Gary F.
Electrical connectors
Contact comprising cutter
Insulation cutter
439941, H01R 424
Patent
active
057625166
DESCRIPTION:
BRIEF SUMMARY
DETAILED DESCRIPTION OF THE INVENTION
1. Field of Utilization in Industry
The present invention relates to a contact for providing an area to be electrically and detachably connected with another electro-conductor at a terminal of an electric wire.
Further, the present invention relates to a terminal connector provided with such a contact. Particularly, the present invention is suitably applicable to a cable-connecting apparatus used for a high-speed communication network.
2. Prior Art
Recently, an amount and speed of information transmitted by an electrical communication network, have been significantly accelerated. In such a high speed communication network, coaxial cables or optical cables are generally used because they have favorable transmission characteristics, particularly excellent in crosstalk-proof capacity. However, when the network is formed, e.g., in a business building, a cable of twisted-pair (i.e., a balanced cable) is preferably used due to its desirable handling property in the installing operation. Although the twisted-pair cable itself has been improved to be capable of high-speed transmission of information by the recent development of cable-manufacturing technology, an overall communication system must be suited to the high-speed communication, including attachments such as terminal connectors constituting a cable-connecting device.
On this point of view, according to the United States standards of electric communication systems for business buildings (ANSI/EIA/TIA 568), networks are classified into several categories in accordance with the information-transmission speeds, wherein the system having the speed higher than 100 MB/sec belongs to category 5. If a high speed data communication is desired by the use of computers or the like in the business building, the network satisfying the category 5 is necessary.
To achieve such a high speed transmission of information as category 5, it is necessary to suppress the crosstalk between adjacent elector-conductors lower than a predetermined level. When the twitted-pair cable is used, it is well-known that the crosstalk in the cable can be reduced by twining core wires consisting of the pair. However, the crosstalk occurs not only in the cable but also in other conductor portion such as a contact is a connector.
Japanese Unexamined Patent Publication (Kokai) No. 1-107478 discloses a connector device used for a cross-terminal of electric communication network in a business building or others and an electro-conductive metallic contact element (i.e., a contact) built in the connector device. This connector device comprises a plurality of connector blocks supported by a base, wherein a plurality of pairs of contacts are orderly arranged in the respective connector block for the connection of a plurality of pairs of core wires. Generally, in the cross-terminal, a plurality of connector blocks with a plurality of pairs of contacts are provided at a predetermined arrangement in a connector device, for terminating, respectively, a group of input cables coming from outside the building and a group of output cables going to the interior of the building. Between the connector blocks for terminating the input cables and those for terminating the output cables, free ends of the respective contacts connected to the respective cables are switchably connected to each other via patch cords to be capable of switching information-transmission paths if necessary.
The contact disclosed in Japanese Unexamined Patent Publication (Kokai) No. 1-107478 is formed by bending a straightly-extending elongated thin metallic plate to a generally U-shape. In each of lengthwise end areas of the contact, a slot extending in the longitudinal direction is formed to provide a U-shaped contact section. When a core wire with an insulation coating is inserted under pressure into the slot of the contact, the opposed edges of the slot of the contact section break the insulating coating to establish the conductivity between the core wire and the contact while firmly securing the core
REFERENCES:
patent: 3798587 (1974-03-01), Ellis et al.
patent: 4066317 (1978-01-01), Bierenfeld et al.
patent: 4171857 (1979-10-01), Forberg et al.
patent: 5186647 (1993-02-01), Denkmann et al.
Itoga Shigekazu
Osawa Rentara
Chernivec Gerald F.
Minnesota Mining and Manufacturing Company
Paumen Gary F.
Ta Tho Dac
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