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Application filed by Marius Nicolae MoldoveanufiledCriticalMarius Nicolae Moldoveanu
Priority to RO96-02475ApriorityCriticalpatent/RO117987B1/en
Publication of RO117987B1publicationCriticalpatent/RO117987B1/en
The invention relates to a pneumatic device for acoustic warning, meant for signalling that a preset low level of the supply pressure has been reached, that losses in the monitoring circuit or an increment of the reduced pressure have occured in an apparatus or device working with a pressure controller. According to the invention, the device comprises a piston (1) having different end diameters, one of the ends entering a chamber (a) linked to the supply source through a throttled channel (b), the other end having a sealing plate (7) pressing on an adjustable seat (8) provided with a whistle (9) which is in contact with a chamber of reduced pressure of a controller (5).