(DE19724460-A1)      The gas decompression turbine (1) has a partition wall (5) provided with gas decompression jets (4) fitted within the gas supply line, with an asynchronous motor and/or generator (3) positioned on the high pressure side of the partition wall. At least one light-weight paddle wheel (7) is fitted to a shaft (6) on the low pressure side of the partition wall, for rotation by the gas outflow from the gas decompression jets. A control device (9) responds to the revs of the paddle wheel shaft exceding a given value, for operation of a safety valve (10) for closing the gas supply line upstream of the partition wall.    USE -   For incorporation in natural gas suply line for driving asynchronous motor and/or generator, e.g. for generating electrical energy.    ADVANTAGE -   Localised ectraction of electrical energy from gas suply line with low installation costs.    (EP988442-A1)      The gas decompression turbine (1) has a partition wall (5) provided with gas decompression jets (4) fitted within the gas supply line, with an asynchronous motor and/or generator (3) positioned on the high pressure side of the partition wall. At least one light-weight paddle wheel (7) is fitted to a shaft (6) on the low pressure side of the partition wall, for rotation by the gas outflow from the gas decompression jets. A control device (9) responds to the revs of the paddle wheel shaft exceding a given value, for operation of a safety valve (10) for closing the gas supply line upstream of the partition wall.    USE -   For incorporation in natural gas suply line for driving asynchronous motor and/or generator, e.g. for generating electrical energy.    ADVANTAGE -   Localised ectraction of electrical energy from gas suply line with low installation costs.    (US6242819-B1)      The gas decompression turbine (1) has a partition wall (5) provided with gas decompression jets (4) fitted within the gas supply line, with an asynchronous motor and/or generator (3) positioned on the high pressure side of the partition wall. At least one light-weight paddle wheel (7) is fitted to a shaft (6) on the low pressure side of the partition wall, for rotation by the gas outflow from the gas decompression jets. A control device (9) responds to the revs of the paddle wheel shaft exceding a given value, for operation of a safety valve (10) for closing the gas supply line upstream of the partition wall.    USE -   For incorporation in natural gas suply line for driving asynchronous motor and/or generator, e.g. for generating electrical energy.    ADVANTAGE -   Localised ectraction of electrical energy from gas suply line with low installation costs.