| 摘要 |
A miniature gas duct outlet for automatically and continuously changing the direction of a gas stream. A blade drive wheel is rotated by the gas stream moving through a duct. The blade drive wheel rotates an axle with round blades rigidly mounted at an acute angle to the axle. The moving round blades continuously change the direction of the gas from one extreme angle to another. The blade drive wheel is mounted on a lever which can be turned by operator from drive position to not drive position. The blade drive wheel being in the drive position is positioned partly in the flow of gas through the outlet and is forced to rotate. The blade drive wheel being in the non-drive position is totally out of the flow of gas and motionless. The housing of the outlet has a shape which allows the housing to be mounted pivotally to the duct and also allows to rotate manually the plane of the continuously changing direction of the gas stream.
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