Abstract: A card guide for mounting printed circuit boards, electronic pathway or component carrying cards, or the like, to an electronic equipment housing having a wall with a pair of openings formed to receive mounting feet provided on the card guide. The card guide body includes a card-receiving guideway on an inwardly facing side of the body and a card mounting structure on the outwardly facing side of the body. The card mounting structure preferably includes L-shaped posts or feet having longitudinally extending portions which enable the card guide to be inserted through an opening in a housing wall to a position in which the L-shaped feet interlock with the housing wall adjacent to the openings. Most preferably the card guide body is resiliently flexible and can be bowed to allow insertion into pairs of mounting openings and will spring back once inserted to secure the card guide to the housing wall.

Abstract: An engagement interface between a removable cartridge containing a rigid disk for storage of data and a disk drive. The cartridge includes an opening for a hub of the disk for spinning and the disk drive has a magnetic spindle with connecting mechanism for extending the spindle into contact with the hub and retracting it out of contact. The cartridge also includes a disk immobilizer to hold the disk with its hub centered in the opening when the cartridge is outside the disk drive, and a detachable mechanical interconnection between the hub and the housing to retain the hub generally centered in the opening when the disk immobilizer is deactivated as the cartridge is inserted in the disk drive but before the spindle has engaged the hub for instances when the cartridge is inserted in the disk drive with other than a vertical orientation.

Abstract: An interface between a removable cartridge containing a rigid disk for storage of data and a disk drive. The cartridge includes a normally closed and locked pivoting arcuately shaped shutter to cover a disk access window and an opening for a hub of the disk for spinning. The disk drive includes a shutter opener arm for unlocking and opening the shutter as the cartridge is inserted therein, a magnetic spindle with connecting mechanism for extending the spindle into contact with the hub and retracting it out of contact, and an abutment surface to deactivate a disk immobilizer when the cartridge is inserted into the disk drive.

Abstract: A mounting structure for a spindle motor assembly is disclosed that is capable of reducing acoustic noise generated by the motor assembly. Standard spindle motor assembly parts are provided with a viscoelastic stator mounting system that isolates and damps vibrations between the rotor assembly and the rest of the spindle motor assembly. Additionally, rotor slots are provided in the rotor cap. The slots are designed to ensure that the resonant frequency of the rotor cap is substantially different than the switching frequency of the motor itself.