Abstract: A modular ornamental luminaire assembly including a luminaire electrical chamber, an ornate cover, and an electrical assembly which is easily affixable or removable from the ornate cover. The luminaire electrical chamber houses an electrical terminal block and an electrical disconnect. The luminaire electrical chamber further includes at least one hollow support arm for supporting the luminaire's optical unit in spatial relation to the electrical components. The hollow support arm maintains and protects the electrical connection between the optical unit and electrical assembly. The electrical assembly is easily affixable to the underside of the cover and easily removable with the cover from the luminaire electrical chamber when the cover is removed from the chamber. The electrical assembly is removed by disconnecting the electrical assembly from the electrical disconnect.

Abstract: The present invention provides a method for selectively storing data files on a multiple volume cartridge (MVC) device which maximizes the likelihood of gaps in stored data appearing at the end of a cartridge. All incoming data files are initially stored in a virtual disk buffer, and checked to determine time of expiration. The expiration information is then used to reorder the virtual data volume files when placed on the MVC device so that the last to expire is stored first, and the first to expire is stored last.

Abstract: A tape deck system uses four sensors to read features on a tape cartridge to determine control operations. A first sensor determines and a second sensor indicate a condition from a set comprising standard tape cartridge present with file protect, standard tape cartridge present without file protect, cleaning cartridge present, and a standard cartridge quiescent state. The remaining two sensors are used with a special cartridge. The special cartridge has features that indicate, to the first two sensors, that the tape deck system is in the standard cartridge quiescent state. A third and fourth sensors then read features on the special cartridge indicating cartridge type and file protect status. This system allows special cartridges, such as those that may contain thin tape, to only be accessed by tape deck systems equipped to handle the special cartridges. The sensor for indicating the special cartridge type may be modified to also indicate that the cartridge is properly seated in the tape deck.

Abstract: A magnetic tape servo pattern including track identification. Information from a track identification area intersecting one or more tracks on each frame in combination with information identifying the track as odd or even, is used to uniquely identify the track.