Electrical connectors – With circuit conductors and safety grounding provision – Grounding to conductive sheath of cable
Patent
1986-11-28
1989-04-11
Weidenfeld, Gil
Electrical connectors
With circuit conductors and safety grounding provision
Grounding to conductive sheath of cable
439106, 439449, H01R 466
Patent
active
048201758
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an electrical connector for terminating electric cables such as a transmission cable which is used for the internal signal wiring of a computer or the like and particularly connecting to a post header mounted on the printed circuit board.
A transmission cable for the internal signal wiring of a computer has a plurality of signal wires. The arrangement of the signal wires in an insulating jacket of the cable gives rise to a problem of crosstalk, i.e., unwanted exchange of signals between the adjacent signal wires. An electric cable is known which comprises a plurality of signal wires disposed in parallel to one another in a plane in an insulating jacket and a plurality of ground wires each disposed between alternate adjoining or adjacent signal wires to provide protection against crosstalk.
Crosstalk between the adjoining signal wires can be avoided by using this kind of cable. However, in an electrical connector establishing an electrical connection between the signal and ground wires of the cable terminated respectively to the signal and ground contacts in the connector and a printed circuit board, there is likely to arise quite a bit of difficulty in the connection between the ground wires and the ground terminals of the printed substrate. An electrical connector is known for connecting the ground wires of an electric cable to the ground terminals of a printed substrate. According to this connector, a part of the contacts which are connected to the signal wires is also connected to the ground wires for connecting them to the ground terminals on the printed circuit board. This connector has the advantage in that the crosstalk between the signal contacts adjoining ground contacts can be avoided by using some of the signal contacts as ground contacts. However, on the other hand, the connector has the disadvantage because since some signal contacts are used as ground contacts, the number of signal contacts to transmit signals decreases. This is especially true when the number of signal contacts are further decreased when the number of signal contacts to be protected must be increased.
Under these circumstances, it is an object of this invention to provide an electrical connector which can satisfactorily prevent the crosstalk between signal contacts without decreasing the density required to accommodate increased cable size in the number of signal conductors.
The electrical connector of this invention comprises a plurality of signal contacts disposed in two rows in an insulating housing and each having one end for connection to respective signal wires in an electric cable and another end for connection with a signal terminal of a member to which the connector is to be connected, a plurality of ground contacts disposed in a row between the two rows of signal contacts and having one end for connection to ground wires in the cable and another end for connection with a ground terminal of the member to which the connector is connected, and shield plates disposed between the signal contacts to prevent crosstalk therebetween.
The invention is illustrated by the accompanying drawings of which a brief description follows:
FIG. 1 is a perspective view of an electrical connector embodying this invention.
FIGS. 2A and 2B are cross-sectional views of the cable shown in FIG. 1 which are taken along the line 2--2 of FIG. 1.
FIGS. 3 and 4 are cross-sectional views of the connector shown in FIG. 1 which are taken along the lines 3--3 and 4--4, respectively, of FIG. 1.
FIG. 5 is a perspective view of the contacts in the connector of FIG. 1.
FIGS. 6 to 12 are views showing a process for the preparation of a contact assembly for the electrical connector of this invention, in which FIGS. 6A, 7A, 8A, 9A, 10A, 11A and 12A are each a front elevational view of the assembly. FIGS. 6B, 7B, 8B, 9B, 10B, 11B and 12B are each a side elevational view thereof, and FIGS. 8C, 9C and 10C are each a bottom plan view thereof.
FIGS. 13A and 13B are a front elevational view and a bottom plan view, respectively, of the gro
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patent: 4094564 (1978-06-01), Cacolici
patent: 4634211 (1987-01-01), Poliak et al.
patent: 4641904 (1987-02-01), Kosugi et al.
patent: 4737117 (1988-04-01), Lockard
Navy Technical Disclosure Bulletin, vol. 10, No. 1, 9/84, Arlington, pp. 81-84.
Hasegawa Izumi
Kamono Takashi
AMP Incorporated
Austin Paula A.
Kita Gerald K.
LaRue Adrian J.
Noll William B.
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