Electro-acoustic signalling horns

Details Electro-acoustic signalling horns Electro-acoustic signalling horns

G - Physics

10

K

84/63

G10K 9/00 (2006.01) G10K 9/22 (2006.01)

Patent

CA 1048824

ABSTRACT OF THE DISCLOSURE: An electro-acoustic signalling horn of the type com- prising a case containing an electromagnetic excitation system, a diaphragm subjected to the action of said system, and a sound amplifying box extending a labyrinth chamber. Said box is in a single moulded piece and has a lateral opening into said chamber and adapted to receive the diaphragm and the case. Said diaphragm and said case are rendered integral by a metal plate having an edge portion formed over onto a peripheral portion of the diaphragm and the case, the assembly comprising the case, the diaphragm and the plate being maintained in said opening by adhesion of the plate to the adjacent portion of the labyrinth chamber and cooperation of the formed-over peripheral portion of the plate with the edge of the opening.

266662

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