Abstract: A passive heat sink for use in a portable personal computer includes a thermal mass, such as an aluminum plate, that is adapted to make thermal contact with the CPU or IC, whose temperature is to be regulated. The thermal mass is formed to enable excess heat from the CPU or integrated circuit to be channeled away by thermal conduction from the CPU or IC and dissipated or released in the computer housing, such as the keyboard, which can tolerate limited amounts of heat. In order to accommodate CPU's and IC's of different thicknesses, a thermally conductive spacer, for example, formed from copper, may be secured to the CPU or integrated circuit by way of a thermally conductive adhesive, and, in turn, placed in contact with the thermal mass. With such a configuration, the space requirements for the heat sink within the portable personal computer for cooling are minimized, while the expense of more expensive cooling systems such as heat tubes and Oasis-type cooling systems is obviated.

Abstract: A drive platform assembly for a personal computer for carrying both floppy disc drives and hard disc drives which facilitates the installation and replacement of such disc drives. The drive platform assembly includes a drive platform and an expansion platform. The drive platform is adapted to carry a 3.5 inch floppy disc drive and two 3.5 inch (1-inch height or a single 1.56-inch height) IDE hard disc drives. A mounting bracket is provided for carrying either a floppy disc drive or a hard disc drive that is rotated into place within the drive platform. Once rotated into place, the mounting bracket is automatically grounded. The mounting bracket is adapted to be secured to the drive platform relatively quickly and easily without the use of fasteners. An expansion platform is provided and adapted to be releasably secured to the drive platform to form the drive platform assembly. The expansion platform is adapted to carry additional floppy or hard disk drives.