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ITALIANA ACCOMULATORI MOTOCARRI MONTECCHIO FAB
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ITALIANA ACCOMULATORI MOTOCARRI MONTECCHIO FAB
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Application filed by ITALIANA ACCOMULATORI MOTOCARRI MONTECCHIO FABfiledCriticalITALIANA ACCOMULATORI MOTOCARRI MONTECCHIO FAB
Priority to ES0074973UpriorityCriticalpatent/ES74973Y/en
Publication of ES74973UpublicationCriticalpatent/ES74973U/en
Application grantedgrantedCritical
Publication of ES74973YpublicationCriticalpatent/ES74973Y/en
Pneumatic loudspeaker, whose casing contains a conduit channel for the pressurizing medium, an oscillating membrane and a helical acoustic channel, characterized in that the entrance piece and the end, the latter in the form of a funnel, of the acoustic channel pass perpendicular to the plane of curvature of the middle part of the helical housing and are directed towards the same side. (Machine-translation by Google Translate, not legally binding)