Shielded connector assembly with noise suppressor

• US 4,960,392 A
• Filed: 01/16/1990
• Issued: 10/02/1990
• Est. Priority Date: 01/16/1990
• Status: Expired due to Fees

• Current Assignee: Northern Technologies Corp.
• Original Assignee: Robert G. Dickie
• Inventors: Dickie, Robert G.
• Primary Examiner(s): Paumen, Gary F.
• Application Number:
  US07/465,700
• Time in Patent Office: 259 Days
• Field of Search: 439/610, 439/620, 439/98, 439/99, 333/181-185, 336/84 C, 336/84 R, 336/175, 336/176
• US Class Current: 439/620.05
• CPC Class Codes: H01R 13/7197 with filters integral with or fitted onto contacts, e.g. tubular filters

Abstract

A multiconductor shielded connector is disclosed in which a flexible, compressible double bushing is used between the connector half shells and the multiconductor cable. The double bushing comprises an outer bushing dimensioned to grasp the outer jacket of the cable at the exiting end of the connector. A concentric, longitudinally offset inner bushing is inserted under the shielding (braid or foil) and mates with ridges on the inner surface of the half shells to form a tight, continuous radiation seal. A ferrite ring is inserted into a recess on the inner diameter of the inner bushing to provide noise suppression for signals traveling through the conductors of the cable. The inner and outer bushings are connected together with a fine web which maintains concentricity and axial displacement of the bushings before and during assembly, but which does not interfere with the operation of the connector after assembly.

Claims

1. A noise suppression system for electronic equipment, comprising

an electrical cable with an outer sheath surrounded by a conductive shielding, and

a ferrite cylinder having an insulated outer surface,

said ferrite cylinder being inserted between said outer sheath and said conductive shielding.

2. The noise suppression system according to claim 1 wherein

said ferrite cylinder is split longitudinally to simplify insertion over said sheath.

3. The noise suppression system according to claim 1 further comprising

an electrical connector encapsulating said ferrite cylinder and providing electrical connections for the wires of said cable.

4. The noise suppression system according to claim 3 further comprising

means, including said insulated ferrite cylinder, for urging said conductive shielding against the inner surface of said connector.

5. The noise suppression system according to claim 3 further comprising

means, not including said insulated ferrite cylinder, for providing strain relief for said connector.

6. A noise suppression system for electronic equipment comprising

a cable for carrying electrical signals to and from said electronic equipment, said cable including an outer insulative sheath surrounded by a conductive braid,

a connector for connecting said cable to said electronic equipment, said connector including a bushing for insertion between said braid and said outer sheath, and

a ferrite noise suppressor located on the inner diameter of said bushing.

7. The noise suppression system according to claim 6 wherein

said ferrite noise suppressor comprises a solid ferrite ring.

8. The noise suppression system according to claim 6 wherein

said ferrite noise suppressor comprises a split ferrite ring.

9. The noise suppression system according to claim 6 further comprising

means for capturing said braid between the outer diameter of said bushing and the interior of said connector to complete an electromagnetic shield including said braid and said connector.

10. The noise suppression system according to claim 6 further comprising.

means for providing strain relief for said connector at a point on said said cable substantially displaced from said ferrite noise suppressor.