Automotive vehicle tone generator

Details Automotive vehicle tone generator Automotive vehicle tone generator

1992-02-10

1993-06-08

Ng, Jin F.

Communications: electrical

Audible indication

Diaphragm

340384R, 381188, 381205, 116142R, 181159, 181148, G08B 300

Patent

active

052183378

ABSTRACT:
A transducer and tone generator embodying the same and method of assembling the transducer components with the use of an assembly fixture. The transducer components include a rigid annular structure, a pole piece, an electromagnetic coil assembly, and a diaphragm. The method of assembly includes the steps of engaging (1) a diaphragm-engaging surface of the rigid annular structure and (2) an end surface of the pole piece with (1) an outer annular fixture surface and (2) a central fixture surface respectively while a pole piece end portion is engaged with a pole piece engaging surface of the rigid annular structure so as to establish a predetermined axial space between the diaphragm-engaging surface and the end surface, securing the pole piece and rigid annular structure together against relative axial movement with respect to one another and the electromagnetic coil assembly in aligned relation thereto within a central space of the rigid annular structure and in surrounding relation to the pole piece, and mounting the diaphragm in assembled relation within the transducer solely by engaging a marginal edge portion thereof with the diaphragm engaging surface to be retained therein solely by the magnetic attraction of a permanent magnet of the rigid annular structure.

REFERENCES:
patent: 4183278 (1980-01-01), Rea et al.
patent: 4267552 (1981-05-01), Frigo
patent: 4286257 (1981-08-01), Slavin et al.
patent: 4410881 (1983-10-01), Seyler
patent: 4717906 (1988-01-01), Smith
patent: 4823110 (1989-04-01), Dorward et al.

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