Magnetic circuit in a loudspeaker

Details Magnetic circuit in a loudspeaker Magnetic circuit in a loudspeaker

1992-06-24

1994-03-15

Isen, Forester W.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381204, H04R 2500

Patent

active

052951952

ABSTRACT:
A magnetic circuit has a yoke base, a pole formed on the yoke base, an annular magnet mounted on the yoke base, an annular plate having an inclined surface mounted on the magnet. The annular plate has an inwardly downwardly curved sectional shape toward a periphery. A frame for a conical diaphragm is secured to the plate. A plurality of platforms each having a flat surface are formed on the inclined surface, and a plurality of staking projections are formed on the flat surfaces of the platforms. The frame is secured to the plate by staking the staking projections.

REFERENCES:
patent: 4508941 (1985-04-01), Wiggins
patent: 5150419 (1992-09-01), Kizak et al.
patent: 5157731 (1992-10-01), Mitobe
U.S. Patent Application S.N. 666,763.

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