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| Number | Title | Issue Date |
| 7412071 | Low-inductance electromagnetic drive without driving the magnetic flux circuit The present invention relates to a low-inductance electromagnetic drive without driving magnetic flux circuit, which comprises a magnetic pole, a drive coil, an upper magnetic inductive board, a permanent magnet and a lower magnetic-inductive board. The magnetic pol... | 08/12/2008 |
| 7324657 | Speaker apparatus A voice coil and a magnetic driving circuit oscillate a diaphragm and a center cap. A magnetic lighting circuit for providing a magnetic field to an induction coil is mounted separately from a magnetic driving circuit. The induction coil generates an electromotive f... | 01/29/2008 |
| 7136894 | Distinctive vibrate system, apparatus and method An apparatus is disclosed which is configured to announce a transmission from a caller by vibrating in a predetermined manner associated with the caller. Also disclosed is a method comprising: receiving a transmission from a first caller; identifying the first calle... | 11/14/2006 |
| 7123738 | Loudspeaker The present invention is directed to a speaker using lightweight, highly rigid diaphragm having excellent frequency characteristic and improving resistance to environment (including resistance to UV and resistance to fading). For this end, the speaker utilizes a con... | 10/17/2006 |
| 7076079 | Multi-functional actuator Disclosed is a multi-functional actuator comprising: a housing having an internal space and a groove in the inner side; a sound-generating diaphragm with an outer end fixed to the upper end of said housing; a voice coil fixed to the bottom of said diaphragm; a verti... | 07/11/2006 |
| 7024014 | Multiple voice-coil cone-driver A multiple voice-coil cone-driver for driving a loudspeaker includes a first voice-coil, and a second voice-coil coupled in parallel to the first voice-coil. Together, the first and second voice-coils in parallel are characterized by a baseline frequency response wi... | 04/04/2006 |
| 7016515 | Speaker apparatus In an electromagnetic induction type speaker apparatus, individual constants are set in such a manner that the following formula is satisfied N×(R1×R2)1/2/(2π×L1×(1−k | 03/21/2006 |
| 6963651 | Single magnetic circuit dual output speaker The present invention discloses an improved single magnetic circuit dual output speaker, comprising a support retainer with an expanded opening at its front end, a bridge disposed across the opening, a magnetic circuit wound and fixed inwardly in the middle of the b... | 11/08/2005 |
| 6904158 | Speaker apparatus In an electromagnetic induction type speaker apparatus, individual constants are set in such a manner that the following formula is satisfied N×(R1×R2)1/2/{2 Π×L1×(1−k2) | 06/07/2005 |
| 6868165 | Loudspeaker A loudspeaker has a magnetic flux assembly that has a pole piece and a plate and magnet structure for co-operating with a voice coil. The plate structure includes a top plate which is mounted adjacent to the diaphragm assembly of the loudspeaker. There is a cavity w... | 03/15/2005 |
| 6801635 | Speaker device A speaker device for supplying output from an amplifier to a plurality of loud speakers through a dividing network, wherein a network coil constituting the dividing network is wound in a groove in the outer circumferential surface of a cover of a driving part of the... | 10/05/2004 |
| 6639994 | Loudspeaker having adjustable motor strength A loudspeaker comprises a motor structure which incorporates a magnetic flux control system including a field winding, a controller connected between a voltage source and the field winding and, a polarity reversal switch preferably located across the file... | 10/28/2003 |
| 6611605 | Speaker having a device capable of generating sound and vibration Disclosed is a speaker having a device capable of generating sound and vibration for notifying reception of an incoming call when a radio incoming signal is received. The speaker comprises a cylindrical frame; magnetic field forming means disposed in the ... | 08/26/2003 |
| 6373958 | Electrical/mechanical/sound converter and apparatus of electrical/mechanical/sound conversion An electro-mechanical-audio converter and an electro-mechanical-audio converting device using the same employed in mobile terminals such as mobile phones for generating paging vibration which realizes stable vibration function. The electro-mechanical-audi... | 04/16/2002 |
| 6208742 | Electro-acoustic dynamic transducer system for use in a loud speaker An electro-acoustic speaker having no permanent magnet. An audio input signal is applied to a pair of parallel coils, each being in series with a diode. The diodes are oppositely acting, so that the coils conduct during alternate half cycles of the input ... | 03/27/2001 |
| 6108433 | Method and apparatus for a magnetically induced speaker diaphragm An ultrasonic emitter device having broad frequency range capacity with relatively large diaphragm displacement compared to typical electrostatic diaphragm movement. The device includes a core member able to establish a variable magnetic field adjacent th... | 08/22/2000 |
| 5487114 | Magnetless speaker A lightweight speaker is constructed without permanent magnets by providing two coils, one of which is mounted on a movable membrane and the other of which is mounted on a fixed frame. The coils are mounted in close proximity to one another and excited by... | 01/23/1996 |
| 4807295 | Loudspeaker A loudspeaker design that eliminates the close tolerance magnetic gap used in conventional loudspeakers and in which motion of the diaphragm is produced by the attraction and repulsion of the magnetic poles of a solenoid and a permanent magnet. In the pre... | 02/21/1989 |
| 4547632 | Dynamic loudspeaker An electromagnetic loudspeaker with a magnetic structure provided with a cylindrical gap and a frame supporting a diaphragm, the diaphragm carrying a voice coil suspended in the gap of the magnetic structure, the magnetic structure being provided with a t... | 10/15/1985 |
| 4529846 | Dynamic telephone receiver with magnetic shunt A dynamic telephone receiver which is capable of being used in association with hearing aids, has a flux coil positioned around the pole piece and magnet assembly. To minimize the strong magnetic leakage field radiated from the air gap, which can attract ... | 07/16/1985 |
