Cable and termination for high voltage and high frequency applications

• US 5,166,477 A
• Filed: 05/28/1991
• Issued: 11/24/1992
• Est. Priority Date: 05/28/1991
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Scott, John C., Perin, Joseph C. Jr.
• Primary Examiner(s): NIMMO, MORRIS
• Application Number:
  US07/705,866
• Time in Patent Office: 546 Days
• Field of Search: 174/74 R, 174/75 C, 174/75 D, 174/75 F, 174/83, 174/36, 174/113 C, 174/131 A, 439/578, 439/581, 439/583, 439/609, 439/700, 439/739
• US Class Current: 174/74.00R
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/40 specially adapted for high frequency
• CPC Class Codes: H01R 24/566 Hollow cables

Abstract

A cable and termination for high voltage and high frequency current carrying applications includes an inner conductor having a sheath of braided metallic wire and a cylindrical core of flexible material extending within the sheath and supporting the sheath to prevent reduction in diameter of the sheath in response to tensile forces applied to the cable. The core includes one or more wire filaments connected to bear a portion of tensile forces applied to the cable. The inner conductor is encased in an outer insulation assembly which includes a conducting layer, spaced from the sheath and connected for ground return. The cable includes a termination assembly having a socket, connected to the sheath and wire filaments, for receiving an inner conductor of a complementary termination assembly. The socket includes a shank portion for receiving the pin of a complimentary termination assembly and which is fitted within the outer insulation assembly, and a bell portion which abuts the outer insulation assembly and is attached to the metallic wire sheath.

Claims

1. A cable and termination for high voltage and high frequency current carrying applications comprising:

an inner conductor including a tubular sheath of braided metallic wire and a cylindrical core of flexible material extending within said sheath and supporting said sheath to prevent reduction in diameter thereof in response to bending and tensile forces applied to said cable;

an outer insulation assembly enclosing said inner conductor and including a conducting layer, spaced from said sheath; and

a termination assembly including socket means, connected to said sheath, for receiving an inner conductor of a complementary termination assembly.

2. The cable and termination of claim 1 wherein said inner conductor includes at least one wire filament extending through said cylindrical core and attached to said termination assembly, whereby tensile forces applied to said cable and termination are borne by said filament.

3. The cable and termination of claim 2 wherein said wire filament is attached to said socket means, whereby tensile forces exerted on said termination during connection and disconnection with said complementary termination assembly are borne by said wire filament.

4. The cable and termination of claim 1 wherein said cylindrical core is made of a nonconducting material.

5. The cable and termination of claim 4 wherein said cylindrical core is made of a nonconducting material selected from the group consisting of nylon and polytetrafluoroethylene.

6. The cable and termination of claim 2 wherein said inner conductor includes a plurality of wire filaments extending through said cylindrical core.

7. The cable and termination of claim 2 wherein said outer insulation assembly includes a dielectric layer spacing said conducting layer from said sheath.

8. The cable and termination of claim 7 wherein said socket means includes a bell portion and a cylindrical shank portion defining a socket cavity, said socket means being mounted in an end of said cable such that an inner end of said shank abuts said inner conductor and said shank is enclosed by said dielectric layer, and said dielectric layer abuts said bell portion and said sheath is attached to said bell portion.

9. The cable and termination of claim 8 wherein said shank includes longitudinal grooves in an inner periphery thereof receiving said wire filaments in a flush fit, whereby said inner periphery is of uniform diameter to receive a pin of said complementary termination assembly.

10. The cable and termination of claim 9 wherein said socket means is made of gold-plated copper.

11. The cable and termination of claim 10 wherein said bell portion includes a plurality of orifices spaced in a substantially circular pattern and receiving ends of said braided metallic wire of said sheath.

12. A cable and termination for high voltage and high frequency current carrying applications comprising:

an inner conductor including a cylindrical sheath of braided metallic wire, a cylindrical core of flexible, nonconducting material extruding within said sheath, and a plurality of metallic wire filaments extruding through said core;

an outer insulation assembly enclosing said inner conductor and including a dielectric layer enclosing said inner conductor, a shield layer enclosing said dielectric layer, and an outer jacket of a conducting material; and

a termination assembly including socket means for receiving an inner conductor of a complementary termination assembly, said socket means including a shank extending within said dielectric layer and having an inner end abutting said inner conductor and including longitudinal grooves about an inner periphery thereof receiving said wire filaments in a flush fit, said bell portion abutting an end of said selectric layer and including a plurality of orifices spaced in substantially a circular pattern about said bell portion, said orifices receiving ends of said braided wires.

13. The cable and termination of claim 12 wherein said termination includes a ferrule extending about said dielectric layer and including a lip overlapped by said shield layer, a crimp ring clamping said shield layer against said lip, a nut rotatably captured on said ferrule, a cylindrical metallic strain relief fixed to and enclosing said outer jacket and crimp ring, an insulator seal slidably mounted on said dielectric and captured at an end thereof by said ferrule, and resilient means extending between said ferrule and said insulator seal.

14. A cable and termination having an inner conductor, an outer insulation assembly enclosing said inner conductor an including a conducting layer, spaced from said inner conductor and a termination assembly including socket means, connected to said inner conductor, for receiving an inner conductor of a complementary termination assembly, wherein the improvement comprises:

said inner conductor including a substantially cylindrical sheath of braided metallic wire and a cylindrical core of a flexible, nonconducting material extending within said sheath and supporting said sheath to prevent reduction in diameter thereof in response to tensile forces applied to said cable.