Electrical cable

• US 6,444,902 B1
• Filed: 04/10/2001
• Issued: 09/03/2002
• Est. Priority Date: 04/10/2001
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Tsao, Pei, Quach, Frank
• Primary Examiner(s): Nguyen, Chau N.
• Application Number:
  US09/835,925
• Time in Patent Office: 511 Days
• Field of Search: 174/36, 174/117.F, 174/107, 174/102.R, 174/113.R, 174/116, 174/117.FF
• US Class Current: 174/36
• CPC Class Codes: H01B 11/1091 with screen grounding means, e.g. drain wires
• CPC Class Codes: H01B 11/203 forming a flat arrangement
• CPC Class Codes: H01B 7/0861 comprising one or more screens

Abstract

An electrical cable (1) for signal transmission includes a pair of signal transmission groups (12), a single non-insulated first drain wire (14) sandwiched between adjacent inner sides (154) of the signal transmission groups and a pair of non-insulated second drain wires (16) disposed at opposite outer sides (156) of the transmission groups. Each signal transmission group has a pair of insulated signal conductors (13) and a layer (15) of shielding surrounding the insulated signal conductors. Both the first and second drain wires are electrically contacted with outside surfaces (152) of the layers of shielding for providing grounding function. All the signal conductors and the first and second drain wires are arranged side by side and their axes fall on a common plane (10). An optional jacket (17) is wrapped on the signal transmission groups and the first and second drain wires.

Claims

1. An electrical cable comprising a pair of signal transmission groups each group having a pair of insulated signal conductors and a layer of shielding wrapped on the insulated signal conductors, a single non-insulated first drain wire sandwiched between adjacent inner sides of the signal transmission groups, and a pair of non-insulated second drain wires disposed at opposite outer sides of the transmission groups, both the first and second drain wires being conductively contacted with outside surfaces of the pair of layers of shielding, wherein the first drain wire has a cross-section larger than that of the second drain wire.

2. The electrical cable as claimed in claim 1, wherein the layer of shielding is made up of aluminum foil.

3. The electrical cable as claimed in claim 1, wherein all of the signal conductors and the first and second drain wires are arranged side by side and their axes fall on a common plane.

4. The electrical cable as claimed in claim 1, wherein an outer jacket is wrapped on all of the signal transmission groups and the first and second drain wires.

5. An electrical cable comprising at least side by side one pair of signal transmission groups each group having a pair of insulated signal conductors surrounded by a layer of shielding, one single non-insulated drain wire sandwiched between said pair of signal transmission groups in mechanical and electrical contact with the corresponding layers of shielding, and at least one additional non-insulated drain wire disposed at one lateral end of one of said pair of signal transmission groups in contact with the corresponding layer of shielding opposite to said single drain wire, wherein said single drain wire has a cross-section larger than that of the additional drain wire.

6. The cable as claimed in claim 5, wherein said pair of signal transmission groups, said single drain wire and said additional drain wire are aligned along a lateral direction of said cable.