Abstract: A toy car racing board game having two continuous car tracks which have serpentine portions and cross each other at several points. Except for the crossing points, the tracks are hidden by walls on their opposite sides. Each player electrically controls a car with the object of completing one or more passes around its track or to prevent the other car from completing a pass by colliding with it at any of the intersections.

Abstract: Treated sewage is loaded into the tanks of a large ocean-going tanker, transported therein to a deep water site, and then deposited directly onto the seabed at that site through piping deployed from the vessel and extending downwardly therefrom. The piping may be a flexible hose, or a string of steel pipes, or a combination of the two. The piping may be deployed over the side of the vessel, or preferably from a moon pool. The depth of the seabed for deposit might for example be one thousand or fifteen hundred meters, or considerably deeper, e.g., 7000 m; in extremely deep water it may not be necessary for the piping to extend fully to the seabed, although it is recommended that it extend at least below the depth at which the majority of fish are found and below the depth where there are significant thermal changes.

Abstract: It is proposed to construct a large diameter subsea bore hole (e.g. about 10 to 50 meters in diameter) provided with a stable wall by a method which comprises drilling a number of bore holes around the circumference of a ring of large diameter, supplying to the ring bore holes material to locally stabilize the surrounding geologic formations, and forming a central bore hole, or shaft, within the perimeter of the ring by drilling and reaming or by excavation. The ring bore holes and locally stabilized geologic formations form a stable wall of large diameter for the central bore hole shaft. It is contemplated that a large diameter subsea bore hole of the type described above could be used for the safe emplacement and disposal beneath the seabed of a large waste job object such as the shielded reactor core of a decommissioned nuclear submarine, or of other waste objects containing radioactive material.

Abstract: This invention concerns a semi-submersible marine platform comprising an above water deck, a support structure extending downwardly from the deck into the water and supporting the deck on pods providing buoyancy for the platform, and stabilizer legs spaced around the support structure and outrigged underwater thereby or therefrom, each stabilizer leg preferably being free to pivot under environmental forces about an underwater universal pivot and extending upwardly therefrom to project substantially above mean water level and provide a cut water plane area for imparting a righting moment against environmental forces acting on the platform.

Abstract: The invention provides an exhaust valve comprising a valve body, an inlet duct in the valve body for receiving gas to be exhausted through the valve, an exhaust duct in the valve body for exhausting the said gas from the valve, and a valve member subject on the one hand to the ambient external pressure and on the other hand to the pressures in the inlet and exhaust ducts, the valve member moving according to changes in the said pressures between an open position in which there is communication between inlet and exhaust ducts for the exhaustion of gas through the valve and a closed position in which it cuts off such communication; the valve member is preferably mounted in a diaphragm. It also provides a similar valve in which the valve member is instead subject on said one hand to a predetermined maintained fluid pressure, e.g. that within a pressurized chamber. The latter valve can be used to control the pressure in an exhaust line from the exhaust valve.