Abstract: A high speed data storage and retrieval system for use with disc record media includes a storage module for holding a plurality of discs, a read/write station and a changer apparatus for transporting discs between the storage module and the read/write station. In a preferred embodiment the storage discs are enclosed in a protective cartridge and held in place in the cartridge so that the recording surfaces of the disc do not touch the inside surfaces of the protective cartridge. The changer apparatus includes a pair of belt elevators. One of the elevators designated the "up" elevator transports a selected disc from the storage module to the read/write station. After processing, the selected disc is returned to the storage module via a second elevator which is designated the "down" elevator. A pivot block assembly is used to aid in the transfer of disc from the "up" elevator to the read/write station and from the read/write station to the "down" elevator.

Abstract: A protective cartridge is provided for a disc record used in an optical playback system. The protective cartridge is provided with finger members to suspend the disc record in the cavity of the cartridge so that the information bearing surfaces of the disc record do not touch the inside surfaces of the cartridge. When the record package is in storage, the finger members are biased to engage the outside rim of the disc record. Tapered pins provided on the optical player disengage the finger members to permit the disc record to rotate in the optical player.

Abstract: A first set of pre-tabbed solar cells are assembled in a predetermined array with at least part of each tab facing upward, each tab being fixed to a bonding pad on one cell and abutting a bonding pad on an adjacent cell. The cells are held in place with a first vacuum support. The array is then inverted onto a second vacuum support which holds the tabs firmly against the cell pads they abut. The cells are exposed to radiation to melt and reflow the solder pads for bonding the tab portions not already fixed to bonding pads to these pads.