Abstract: The acoustic warning device comprises a casing (1) in which at least one iliently deformable diaphragm (10, 11) is mounted. In the casing (1) there is also mounted, in a fixed position, at least one excitation winding (19, 20). A movable ferromagnetic member (8, 9), subjected in use to the magnetic field generated by the winding (19, 20) is connected to the diaphragm (10, 11). The movable ferromagnetic member (8, 9) includes a substantially bell-shaped axial end portion (8a, 9a) disposed around the winding (19, 20).
Type:
Grant
Filed:
April 7, 1997
Date of Patent:
June 2, 1998
Assignee:
Fabrica Italiana Accumulatori Motocarri Montecchio--F.I.A.M.M. SPA