Abstract: A sensor for detecting the presence of wheels of a rail vehicle includes first and second Hall Effect devices, a magnet for supplying a magnetic field to the first and second Hall Effect devices, the first and second Hall Effect devices and the magnet being mounted adjacent to the rail, whereby a railway vehicle wheel changes the magnetic field in the Hall Effect devices to produce wheel indication signals, and a processing circuit for receiving the wheel indication signals from the first and second Hall Effect devices and for producing an output signal in response to the wheel indication signals. A method of detecting the presence of a wheel is also provided.

Abstract: A two-player board game of chance and strategy, that uses sixteen direction-oriented game pieces, and fifty Additional Movement playing cards on a chess-like playing board. Each player is dealt seven or eleven cards, all concealed from view with only one card revealed during play. The game piece movements are used to capture or position the game pieces (1), for capture splays. The six different types of direction-oriented game pieces and their attributes change direction each time they reach the limits of the board on either opposing side. When a card is played, both the standard game piece movement and the matching card's movement (2) are taken together and represent one extended move (3,4). The game is won-by capturing the opponent's Lion type game piece. Additional variations include a four-player version and Level-Four Play.

Abstract: A gas turbine is provided in which heat is removed from compressed air bled from the compressor section, for purposes of cooling in the turbine section, using a first heat exchanger to transfer heat from the cooling air to an intermediate fluid. The heat so removed is then returned to the cycle by transferring it from the intermediate fluid to a fluid to be injected into the combustion section, such as gaseous fuel or water for NOx control, using a second heat exchanger. A third heat exchanger may be used in conjunction with the second heat exchanger to control the temperature of the intermediate fluid and, hence, the temperature of the cooling air.