Patents Assigned to Advanced Magnetic Technologies, Inc.
  • Patent number: 6639995
    Abstract: Disclosed is a concentric magnetic configuration for a speaker system which can produce a full range of frequency sounds from a single source magnet. The magnetic configuration of the present invention includes a high frequency pole plate and one or more middle yoke iron plate placed directly on a cylindrical permanent magnet wherein at least one magnetic flux controlling slot is formed beneath the high frequency pole plate and the middle yoke plate. The multiple air gaps defined by the pole plate and middle yoke iron produce a full range of frequency magnetic fields which can drive the high, medium, and low frequency voice coils.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: October 28, 2003
    Assignee: Advanced Magnetic Technologies, Inc.
    Inventor: You Lian Yu