Shielding device for T-type BNC connectors

• US 5,387,127 A
• Filed: 08/26/1993
• Issued: 02/07/1995
• Est. Priority Date: 08/26/1993
• Status: Expired due to Fees

• Current Assignee: Tsan-Chi Wang
• Original Assignee: Tsan-Chi Wang
• Inventors: Wang, Tsan-Chi
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US08/111,788
• Time in Patent Office: 530 Days
• Field of Search: 439/188, 439/578-582, 439/314, 439/320, 439/322
• US Class Current: 439/582
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/547 Splitters

Abstract

A shielding device for protecting a T-type BNC connector against static electricity and magnetic fields, comprised of a four-way shielding tube formed by connecting two opposing halves together through a sealing process and covered around the T-shaped shell and two transversely disposed opposite BNC jacks of the T-type BNC connector, and a tubular insulative shield covered around the vertically disposed BNC plug of the T-type BNC connector, the four-way shielding tube having a blocking plate blocked on the T-shaped shell of the T-type BNC connector at the bottom and an earth terminal fastened in a hole on the blocking plate.

Claims

1. A shielding device for a T-type BNC connector comprised of a T-shaped shell having two BNC jacks transversely disposed in reversed directions and a BNC plug vertically disposed in the middle at the top, the shielding device comprising a four-way shielding tube covered around said T-shaped shell and said BNC jacks, and an insulative tubular shield covered around said BNC plug, said four-way shielding tube being comprised of a first insulative shield and a second insulative shield respectively made in the shape of a half-round tube and connected together through a sealing process, said four-way shielding tube comprising symmetrical ribs raised from an inside wall thereof clamped on said T-type BNC connector with an annular gap retained between said four-way shielding tube and said BNC jacks for inserting a respective external BNC connector to connect to either BNC jack, a block plate blocked on said T-shaped shell of said T-type BNC connector at the bottom, and an earth terminal inserted in a center through hole on said block plate and connected to said four-way shielding tube, said insulative tubular shield being comprised of a tubular taper body fitted around a rotating ring on said BNC plug.

2. The shielding device of claim 1 wherein said earth terminal is comprised of rivet fitted into said center through hole of said blocking plate, a tether chain connected to said rivet, and a packing ring fastened around said rivet to retain said tether chin in place.

3. The shielding device of claim 1 wherein said earth terminal is comprised of a rivet fitted into said center through hole of said blocking plate, and a ball chain connected to said rivet.

4. The shielding device of claim 1 wherein said four-way shielding tube and said insulative tubular shield are respectively made of Acrylnitrile-Butadiene-Sterene copolymer through an injection molding process.