Abstract: The viscoelastic spacer is made of a layer of viscoelastic material and a layer of wear-resistant, low coefficient of friction material which together form a unitary structure for damping vibration. Spacers are placed at the top and bottom of a storage module containing a disk drive. Upon slidable insertion of the storage module into an enclosure, features on the inner surface of the enclosure engage with the spacer in a way which subjects the spacer to both compression and shear forces generated by vibration of the disk drive and of other vibration sources in the environment of the storage module.

Abstract: A composite shelf in a shelf frame supports a plurality of disk drives and attenuates vibrations in the shelf. In the composite shelf, there is a double wall having an outer wall and an inner wall for supporting the disk drives mounted on the shelf. A stiffener between the inner wall and outer wall strengthens the composite shelf to reduce flexure in the composite shelf when the shelf is loaded by disk drives mounted on the shelf. A damping layer is placed between the stiffener and one of the inner wall or outer wall. This damping layer attenuates vibrations in the composite shelf so as to reduce vibrations transmitted from the composite shelf to the disk drives supported by the composite shelf. A second damping layer is placed between the stiffener and the other wall. Both damping layers attenuate vibrations in the composite shelf so as to reduce vibrations transmitted from the composite shelf to the disk drives supported by the composite shelf. A third damping layer may be placed within the stiffener.

Abstract: A support mechanism for raising and lowering a terminal monitor comprising an upper assembly and a lower assembly and a plurality of pivotable arms interconnecting the upper assembly and lower assembly. The upper assembly includes an upper plate, which supports the monitor, and an upper slidable plate slidably coupled to it, and the lower assembly includes a base plate and a lower slidable plate slidably coupled to it. Due to the way the pivotable arms are coupled to the various plates, when the upper slidable plate is driven with respect to its associated upper plate, the arms pivot either to raise or lower the upper assembly and its monitor load with respect to the lower assembly.