G - Physics – 10 – K
Patent
G - Physics
10
K
G10K 9/12 (2006.01) B60Q 5/00 (2006.01) G10K 9/13 (2006.01)
Patent
CA 2129628
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 (18), a pole piece (38), an electromagnetic coil assembly (46), and a diaphragm (42). The method of assembly includes the steps of engaging (1) a diaphragm-engaging sur- face (22) of the rigid annular structure and (2) an end surface (40) of the pole piece with (1) an outer annular fixture surface (92) and (2) a central fixture surface (90) respectively while a pole piece end portion (40) is engaged with a pole piece engaging surface (90) of the rigid annular structure (88) so as to establish a predetermined axial space between the diaphragm-engaging surface (22) and the end surface (40), securing the pole piece (38) and rigid annular structure (18) together against relative axial move- ment with respect to one another and the electromagnetic coil (46) assembly in aligned relation thereto within a central space of the rigid annular structure (18) and in surrounding relation to the pole piece (38), and mounting the diaphragm (42) in assembled relation within the transducer (12) solely by engaging a marginal edge portion thereof with the diaphragm engaging surface (22) to be retained therein solely by the magnetic attraction of a permanent magnet (38) of the rigid annular structure (18).
Atoma International Corp.
C-Mac Invotronics Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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