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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Detonator filled in with destilled water!Activated by small battery touch!Petty patent MP-224 !
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A manual hoist for loads light enough to be lifted with muscle power. In one embodiment the device consists of two handles resembling retractable dog leashes. The handles are operated by turns with means of locking mechanisms comprising ratchets locking respective reels. The user keeps a handle in e.....
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The invention reduces the number of wheels in a mechanism. It can be used in gearbox of automobiles, in field of robotics, and automation where movement is transfered from gear to gear. For example if we have 8 gears that transfer rotation one to another than with this invention it can be made to us.....
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simple software product
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