Electro-mechanical and acoustic transducer for portable terminal unit
Patent 6208237 Issued on March 27, 2001. Estimated Expiration Date: 
November 26, 2017. 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.
November 26, 2017. 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 ReferencesElectro-vibration transducer Selective call receiver having audible and tactile alerts Dual mode transducer for a portable receiver Integrated vibrating and sound producing device Taut armature resonant impulse transducer Implantable electromagnetic hearing transducer Patent #: 5554096 InventorsApplicationNo. 979746 filed on 11/26/1997US Classes:340/388.1, Diaphragm (e.g., horn or buzzer)340/7.6, Vibratory (i.e., tactual) alarm340/7.62, Audible381/151, Body contact wave transfer (e.g., bone conduction earphone, larynx microphone)381/396Electromagnetic (e.g., dyynamic)ExaminersPrimary: Lieu, JulieAttorney, Agent or FirmForeign Patent References
International ClassG08B 3/0/0Foreign Application Priority Data1996-11-29 JPAbstractThe present invention purposes to realize an electro-mechanical and acoustic transducer capable of generating both strong vibration and sound. In an electro-mechanical and acoustic transducer of the present invention, mass of a mechanical vibration system of the electro-mechanical and acoustic transducer is increased by attaching a weight to a magnetic circuit unit or integrated the weight with the magnetic circuit unit, whereby large vibration is obtained from the electro-mechanical and acoustic transducer. | |
