A semiconductor optical amplifier for amplifying an optical signal. The amplifier comprises an input for receiving the optical signal and an output for outputting an amplified version of the optical signal. A semiconductor active medium is provided for defining an amplification path extending betwee.....
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Rotary piston machine has a rotating piston attached to a motor shaft, with chambers in a cylindrical housing, equipped with a cylindrical bore in which the rotary piston works, the inside surface of the bore cylinder being divided equidistant from some drawers that slide in the guiding windows of t.....
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The FHT Stove provides switchable, fail-safe heat transfer from wood burning convector stoves to any hydronic heating circuit. A low noise fan reverses the natural upward flow of hot air around the outside of a stove, drawing heat downwards to a heat exchanger. Heat is only transferred when the fan.....
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