International Business Machines Corporation

Scott Marvin Thorvilson

Rolland Dean O'Groske

Keith Franklin Tharp

Glenn Ray Oldenburg

Randall Vincent Tointon

Ewald E Stadler

Thomas William Nash

Alfred Wilhelm Mueller

Edward Allan Highum

Sandra J Shirk/Heath

Paul W Schaefer

James L Peacock

John Stephen Maas

Timothy Paul Duncan

Michael K Brown

Sandy J Shirk/Heath

An electromagnetic interference shielding arrangement, includes a duplex optical transceiver having a light-emitter and a light-receiver disposed adjacent to each other and at an end of the optical transceiver. A first electromagnetic interference shield covers a major portion of the optical transceiver. A tailstock has an aperture disposed in alignment with the end of the optical transceiver. A second electromagnetic interference shield is positionable to shield the end of the optical transceiver. The second electromagnetic interference shield includes a pipe formed from a conductive material. The pipe has two opposing openings, and an axis extending from one of the openings to the other of the openings. The pipe has a profile that corresponds to a profile of the end of the optical transceiver. A septum is attached to the pipe. The septum is formed from a conductive material. The septum is arranged to extend in a direction that is at an angle to the axis.

Enhanced electromagnetic interference shield

A shielded bulk cable having a plurality of insulated conductors in a seamless covering. The seamless covering surrounds the plurality of insulated conductors and forms a seamless electromagnetic shield and electric insulator. The seamless covering has a conductive layer and an insulating layer. The conductive layer is bonded to the insulating layer and has a thickness substantially less than that of the insulating layer.

Shielded bulk cable

An electrical connector for computer cabling or similar types of cabling wherein data signals are transmitted over the cables is described and illustrated as having a ferrite electro-magnetic interference suppressor element surrounding the conductors of the cable and all of which are enclosed and incorporated within the connector assembly. The enclosure and incorporation of the ferrite suppression element within the connector assembly greatly improves the performance of the ferrite device while, at the same time, permitting the use of space within the connector assemblies which otherwise might be wasted or unused. The incorporation of the ferrite device into the housing permits the placement of the ferrite device at the optimum location for electro-magnetic interference suppression.

Ferrite block in a cable connector premold

An electrical connector having a housing and a swivel member. The housing defines an opening and the swivel member defines a cable passageway. The swivel member is configured so that an electrical cable may be disposed through the cable passageway and the opening. The swivel member is pivotally mounted to the housing such that, when an electrical cable is disposed in the passageway, the cable may pivotally move with respect to the housing.

Multi-directional shielded cable exit

An enclosure for an electronic device forms a barrier to electro-magnetic radiation. A typical cross-section of the enclosure comprises three parallel layers. The outer and inner surface layers are of a polymeric base material in which is suspended an electrically conductive fill material, giving the surface layers relatively high electrical conductivity. The middle layer is of a polymeric base material, in which is suspended fill material having high magnetic permeability, giving the middle layer relatively high magnetic permeability. In the preferred embodiment, the enclosure is constructed using a co-injection molding process. Nickel-coated graphite (high conductivity) in a polymeric base is injected into a mold from the outer co-injection nozzle, while carbonyl iron powder (high permeability) in a polymeric base is injected into the mold from the inner co-injection nozzle. The resultant molded structure contains the three layers described above, yet can be made inexpensively in a single co-injection molding operation. The enclosure may comprise multiple co-injection molded pieces, which are attached together by any of various conventional means.

Method for manufacturing electro-magnetic shield having multiple

An enclosure for an electronic device forms a barrier to electro-magnetic radiation. A typical cross-section of the enclosure comprises three parallel layers. The outer and inner surface layers are of a polymeric base material in which is suspended an electrically conductive fill material, giving the surface layers relatively high electrical conductivity. The middle layer is of a polymeric base material, in which is suspended fill material having high magnetic permeability, giving the middle layer relatively high magnetic permeability. In the preferred embodiment, the enclosure is constructed using a co-injection molding process. Nickel-coated graphite (high conductivity) in a polymeric base is injected into a mold from the outer co-injection nozzle, while carbonyl iron powder (high permeability) in a polymeric base is injected into the mold from the inner co-injection nozzle. The resultant molded structure contains the three layers described above, yet can be made inexpensively in a single co-injection molding operation. The enclosure may comprise multiple co-injection molded pieces, which are attached together by any of various conventional techniques.

Growing community of inventors

Rochester, MN, United States of America

Scott Marvin Thorvilson