Abstract: The present invention is directed to a shut-off valve for a suction drainage system wherein flow of waste to a disposable container is stopped at a pre-determined volume which is less than the maximum capacity. A tubular sleeve is coaxially located around the shut-off valve. The shut-off below the maximum volume allows a safety margin for the waste container to be capped off without spilling or geysering.

Abstract: This invention provides automatic testing systems and methods for testing for figural responses to a test inquiry. The testing system includes a test sheet of predetermined dimensions having a grid with a plurality of marking areas arranged in predetermined position and a figural arrangement having a first optical reflectivity arranged within the grid corresponding to one or more of the marking areas. The system includes indicia of a second optical reflectivity overmarking a selected number of the marking areas associated with the figural arrangement and optical scanning means having different optical sensitivities to the first and second optical reflectivities for scanning the sheet to determine the positions of the overmarked areas.