Audio-band electromechanical vibration converter
Patent 4750208 Issued on June 7, 1988. Estimated Expiration Date: 
June 7, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 7, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1962055 2284444 3050583 3085568 3277384 3334195 3880152 Quadraphonic headphone with ambience programmer Body-supporting means with adjustable vibratory means in the audible frequency range Health promoting apparatus InventorsAssigneeApplicationNo. 06/649852 filed on 09/12/1984US Classes:381/162, Detail of mechanical vibration coupling to transducer (e.g., tuned vibrating element)381/151, Body contact wave transfer (e.g., bone conduction earphone, larynx microphone)381/27, Center channel381/354, Absorbing or attenuating element601/47, Audio601/57, Having vibrator contained therein601/61Movable membraneExaminersPrimary: Ng, Jin F.Assistant: Byrd, Danita R. Attorney, Agent or FirmInternational ClassesA61H 23/02 (20060101)H04R 5/033 (20060101) H04R 5/02 (20060101) H04R 9/00 (20060101) H04R 9/04 (20060101) H04R 5/00 (20060101) H04R 3/00 (20060101) H04R 1/02 (20060101) H04R 9/06 (20060101) Foreign Application Priority Data1978-05-17 JPAbstractAudio-band electromechanical vibration converter characterized in that a yoke having a permanent magnet and a magnetic gap formed therein is displaceably housed by a damper in a casing to which a vibration plate is attached; a coil attached to the casing is placed in said magnetic gap; and the casing gives an output of a mechanical vibration synchronized with a low-band audio-signal.Other References
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