International Business Machines Corporation

Richard Charles Bartell

Matthew A Nobile

Gerard Frances Muenkel

Gerard Francis Muenkel

Friedrich Wotzka

A vented cover includes a pair of cross-flow ventilation ducts each including an acoustic noise reduction lining. The ducts are 'cross-flow' in that they cross and bypass one another. The cover is affixed to an enclosure containing components of a computer system and abuts against a panel of the enclosure having an airflow aperture. An air moving device (AMD) passes air through the enclosure from the ducts if the cover is an intake cover, and/or into the ducts if the cover is an exhaust cover. The ducts increase the air path length, and the acoustic absorbing surface, thereby increasing acoustic attenuation. Airflow resistance is reduced by reducing surfaces perpendicular and close to the area where air enters and by reducing sharp turns in the ducts. The cover has a relatively thin depth because the ducts cross and bypass each other in a very space efficient manner.

Acoustic noise reduction in a computer system having a vented cover

Method and apparatus for acoustic noise reduction in a computer system having a vented cover

Visual inspection device for inspecting the finish on manufactured goods. A plurality of samples are joined together in a substantially flat, substantially disk-like shape for easy viewing. The device includes a viewing hole in the center so that the surface being inspected can be viewed both through the hole and on the outside of the device, thus making comparisons by eye more accurate. The device optionally includes radial slots so that multiple devices can be fastened together or a device can be fastened to another object.

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West Hartford, CT, United States of America

Richard Charles Bartell