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专利名称：Siren发明人：John G. Powell申请号：US06/765831申请日：19850815公开号：US049853A公开日：19870317
摘要：A siren comprises a compressed air supply which is deflected by stationarydeflectors to exit radially through stator ports. A rotor with spaced ports rotatesbetween the stator and deflector thereby opening and closing the stator ports.Stationary vanes are disposed at circumferentially spaced locations, and constitutetogether with the deflector plate and stator and rotor housing, plenums. There arefewer rotor ports than stator ports, which generates an out-of-phase acoustical patternwhich creates an acoustic combination from the stator ports of an acoustic output at adistance from the siren which is more uniform spatially. The thermoplastic seal betweenthe stator and the rotor has minimal clearance under operating conditions having beenrun-in and plastically deformed at a temperature higher than for normal operation.
申请人：SOUTHERN CALIFORNIA EDISON COMPANY, INC.
代理机构：Lyon & Lyon
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