Abstract: A data access system decouples the data processing from the data storage to provide improved accessibility, integrity, scalability and other features. The system comprises: database units arranged in virtual partitions each independently accessible, a plurality of data processing units, and a switching network for switching the data processing units between the virtual partitions, thereby to assign data processing capacity dynamically to respective virtual partitions.

Abstract: A data access system decouples the data processing from the data storage to provide improved accessibility, integrity, scalability and other features. The system comprises: database units arranged in virtual partitions each independently accessible, a plurality of data processing units, and a switching network for switching the data processing units between the virtual partitions, thereby to assign data processing capacity dynamically to respective virtual partitions.

Abstract: A sawhorse includes an elongated workpiece supporting structure and a pair of leg assemblies joined to the workpiece supporting structure, which enables the leg assemblies to be moved between a folded position for storage and transportation purposes and an operative position. Connecting structure connects the leg assemblies to retain the leg assemblies in the operative position thereof and to allow movement of the leg assemblies between the operative and folded positions thereof. Each leg assembly includes a pair of separate lower leg members and is mounted for independent movement in a generally vertical direction and adjusted to a plurality of different positions with respect to the associated leg assembly and the connecting structure while the pair of the leg assemblies are retained in the operative position thereof by the connecting structure. A releasable locking member for each leg member is mounted in the connecting structure for movement between a releasing position and a locking position.

Abstract: A sawhorse includes an elongated workpiece supporting structure and a pair of leg assemblies joined to the workpiece supporting structure, which enables the leg assemblies to be moved between a folded position for storage and transportation purposes and an operative position. Connecting structure connects the leg assemblies to retain the leg assemblies in the operative position thereof and to allow movement of the leg assemblies between the operative and folded positions thereof. Each leg assembly includes a pair of separate lower leg members and is mounted for independent movement in a generally vertical direction and adjusted to a plurality of different positions with respect to the associated leg assembly and the connecting structure while the pair of the leg assemblies are retained in the operative position thereof by the connecting structure. A releasable locking member for each leg member is mounted in the connecting structure for movement between a releasing position and a locking position.

Abstract: A system for treating a surface, such as the outside surfaces of a tall building which can be operated remotely without the need to place a worker in close proximity of the surface to be treated. The system includes a vertical supporting column onto which is mounted a treatment unit. The treatment unit can carry out washing, painting, sandblasting, and similar operations and includes mechanisms for allowing the working head of the unit to be angles with respect to, as well as to move parallel to and perpendicular to, the surface being treated. In another embodiment, a window cleaning unit is suspended from the roof and is allowed to descent while cleaning the exterior surfaces of the windows.