High energy compact permanent magnet assembly for loud speakers

Claim 1

FOR USE IN A LOUD SPEAKER, A MAGNET AND SUPPORTING ASSEMBLY COMPRISING SAID MAGNET, A CUP PIECE AND A POLE PIECE, SAID MAGNET BEING A CYLINDER OF PERMANENTLY MAGNETIZABLE MATERIAL HAVING A FIRST END AND A SECOND END, SAID CUP PIECE HAVING A BOTTOM WHICH IS IN CONTACT WITH THE FIRST END OF SAID MAGNET, A HOLLOW SUBSTANTIALLY CYLINDRICAL SIDE PORTION EXTENDING UPWARD FROM SAID BOTTOM PORTION AND PARTIALLY SPACED AWAY FROM SAID MAGNET, SAID SIDE PORTING HAVING A FIRST INTERIOR CYLINDRICAL SURFACE PORTION ENGAGED IN PRESS-FITTED OR INTERFACING RELATION WITH THE OUTSIDE OF SAID MAGNET NEAR THE FIRST END OF SAID MAGNET, TO ATTACH THE CUP TO THE MAGNET, A SECOND INTERIOR CYLINDRICAL WALL SURFACE PORTION HAVING A GREATER DIAMETER THAN SAID FIRST INTERIOR SURFACE PORTION TO PROVIDE A SPACE BETWEEN SAID SIDE PORTION AND SAID MAGNET, A FIRST EXTERIOR OUTER WALL SURFACE PORTION, AND A SECOND EXTERIOR WALL SURFACE PORTION SPACED INWARDLY FROM SAID FIRST EXTERIOR WALL SURFACE PORTION AND LOCATED AT THE TOP PERIPHERAL OUTER EDGE OF THE SIDE PORTION, SAID POLE PIECE BEING GENERALLY CUP SHAPED AND HAVING A LATERALLY EXTENDING WALL HAVING AN UPPER SURFACE AND A LOWER SURFACE, SADI LOWER SURFACE BEING IN CONTACT WITH THE SECOND END OF SAID MAGNET, A HOLLOW SUBSTANTIALLY CYLINDRICAL SIDE PORTION DEPENDING SUBSTANTIALLY FROM THE PERIPHERY OF SAID LATERALLY EXTENDING WALL PORTION, SAID SIDE PORTION HAVING AN INTERIOR CYLINDRICAL WALL SURFACE PORTION ENGAGED IN PRESS-FITTED OR INTEFERING RELATION WITH THE OUTSIDE OF SAID MAGNET NEAR ITS SECOND END TO ATTACH THE POLE PIECE TO THE MAGNET AND AN EXTERIOR CYLINDRICAL WALL SURFACE PORTION WHICH HAS A DIAMETER LESS THAN THAT OF THE SECOND INTERIOR WALL SURFACE PORTION OF THE SIDE PORTION OF SAID CUP PIECE TO PROVIDE SPACE BETWEEN SAID SURFACES TO SAID POLE PIECE AND CUP PIECE TO RECEIVE A VOICE COIL AND VOICE COIL SUPPORT TUBE.