International Business Machines Corporation

Neil A Anderson

John Lee Colbert

Mark L Kyllo

Don Alan Gilliland

Kevin J Przybylski

Michael Hans Fisher

Donald Wayne Dingfelder

Steven Dale Greseth

Randall John Fuhrman

Dano Ben Lange

Rodney G Ratajczyk

Kyle J Honadel

Cal W Johnson

A noise attenuating system for suppressing noise on circuit board transmission lines is provided. A first ferrous member is attached to a first side of the circuit board and a second ferrous member attached to a second side of the circuit board. The second ferrous member is substantially opposed from the first ferrous member, such that conductive transmission lines are contained between the first ferrous member and the second ferrous member. Transmission line interference is absorbed and suppressed by the first ferrous member and the second ferrous member. In a preferred embodiment, substantially all traces which enter and exit the circuit board on a connector pass between the first ferrous member and the second ferrous member. Apertures in the circuit board allow the ferrous members to adjoin forming a ferrous core.

Method and system for circuit board common mode noise suppression

A cover includes a side panel having an opening therethrough. A sliding member is connected to the side panel, and is slidable to an opened position in which the opening is at least partially uncovered, and is slidable to a closed position in which the opening is closed. A mounting is tab connected to the side panel and is arranged to be accessible through the opening only when the sliding member is in the opened position. A front panel is also provided, which can be fastened and locked to the side panel using no visible fasteners.

Enhanced cover arrangement for a computer

An electrical cabinet includes at least one modular enclosure connectable to at least one of a further, substantially identical modular enclosure, and a pedestal enclosure. The modular enclosure has a generally parallelepiped shape, with at least one space therein for the placement of components. A cover is positionable over the exterior sides of the enclosure, and includes a modular rear cover section positionable over the rear side of the modular enclosure to essentially hide the rear side of the modular enclosure from view.

Modular cabinet assembly for a computer

A direct access storage device (DASD) cage holds a DASD sled which contains an electronic DASD. The sled has a base plate, side walls and a front portion. The cage has side walls and a forward panel. Each side wall of the cage has a groove for receiving an outer edge of the base plate. The front portion interfaces the DASD with a machine connector. The sled has a slidable handle and a pair of pivotable latches which engage the handle. Each latch has an inner finger and an outer finger. Each inner finger engages a slot in the handle while each outer finger moves inward and outward. Stops in the base plate limit the travel of the inner fingers. The handle is pulled rearward to a disengaged position before the sled is installed in the cage. The outer edges of the base plate are placed in the grooves and the sled is pushed forward into the cage. When the sled is half-way into the cage, the latches will partially engage the grooves to stop the movement of the sled. From this position and by pushing the handle forward, the inner fingers are pushed forward by the slots in the handle so that the outer fingers rotate into engagement with profiles in the grooves and the DASD is connected to the machine connector. The sled is removed by pulling the handle rearward so that the outer fingers disengage the profiles. As the sled is removed from the cage, the DASD simultaneously disengages the machine connector.

Direct access storage device housing and tray design

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Rochester, MN, United States of America

Neil A Anderson