Process of manufacturing a shielded and wear-resistant multi-branch harness

• US 6,655,016 B2
• Filed: 03/29/2001
• Issued: 12/02/2003
• Est. Priority Date: 12/13/1994
• Status: Expired due to Term

• Current Assignee: Airbus Helicopters
• Original Assignee: Societe Anonyme DITE Eurocopter France
• Inventors: Renaud, Thierry Jean-Pierre
• Primary Examiner(s): CHANG, RICK KILTAE
• Application Number:
  US09/820,361
• Publication Number:
  US 20010011601A1
• Time in Patent Office: 978 Days
• Field of Search: 298/25, 298/28, 29/33.F, 298/54, 174/36, 174/72.A, 174/103, 174/106.R, 174/71.R, 174/72.R, 174/35.R, 174/2
• US Class Current: 29/825
• CPC Class Codes: H01B 7/0045 Cable-harnesses
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49123 Co-axial cable
• CPC Class Codes: Y10T 29/5187 Wire working

Abstract

A process for the production of a multi-branched bundle of electrical conductors having an electromagnetic shielding system includes partially surrounding a bundle of electrical conductors with a network of metal sheath elements. The metal sheath elements are interconnected to provide electrical continuity in the network and thereby form an electromagnetic shielding system for the bundle. A network of protective braid elements is braided either (i) between the bundle and the network of metal sheath elements, (ii) external to the network of metal sheath elements, or (iii) both (i) and (ii). The protective braid elements are filaments of a wear-resistant material that protect against frictional wear.

Claims

1. A process for production of an electrical harness structure, said process comprising;

(a) providing a bundle of electrical conductors comprising a first branch, a second branch and a third branch extending from a node, said electrical conductors comprising wires, said first branch having a first cross section, said second branch having a second cross section, and said third branch having a third cross section wherein said first cross section is smaller than said second cross section which is smaller than said third cross section; and

(b) braiding directly on said first, second and third branches extending from said node a first protective braid element, a second protective braid element and a third protective braid element, said first, second and third protective braid elements comprising filaments of a wear-resistant material, wherein;

said first protective braid element leads from said first branch to said third branch and said second branch passes laterally through said first protective braid element,

said second protective braid element leads from said second branch to said first branch and said third branch passes laterally through said second protective braid element,

said third protective braid element leads from said third branch to said second branch and said first branch passes laterally through said third protective braid element,

said braiding of said first, second and third protective braid elements on said first second and third branches is performed by first braiding said first protective braid element on said first and third branches, then braiding said second protective braid element on said first and second branches and then braiding said third protective braid element on said second and third branches,

said first, second and third protective braid elements cover, respectively, all of said first, second and third branches, and

said first, second and third protective braid elements, respectively, cover partially, in a vicinity of said node, said third, first and second branches; and

(c) braiding directly on said bundle a metal sheath element to provide electrical continuity of an electromagnetic shielding system for said bundle.

2. The process as claims in claim 1, further comprising braiding directly on said bundle another protective braid element external to said metal sheath element, said another protective braid element comprising filaments of a wear-resistant material.

3. The process as claimed in claim 1, wherein each of said protective braid elements is formed by:

forming a free braiding tail;

laying the free braiding tail against a corresponding branch of said node;

braiding the protective braid element from said free braiding tail; and

securing said free braiding tail in position on the corresponding branch.