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| Number | Title | Issue Date |
| 7438156 | Diaphragm, spherical-shell diaphragm and electroacoustic transducer, and method of manufacturing electroacoustic transducer A diaphragm in one mode of the present invention comprises an outer shape section having a circle with one diameter, or a shape of a polygon to be inscribed in a circle with the one diameter; an inner shape section protruding in one direction with regard to a plane ... | 10/21/2008 |
| 7428946 | Suspension and electro-acoustic transducer using the suspension A suspension with a plurality of roll sections each of which has a semi-cylindrical shape from a cross-section view. The roll sections are disposed side by side based on a straight line connecting two points on an inner periphery or an outer periphery. The roll sect... | 09/30/2008 |
| 7360626 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 04/22/2008 |
| 7118649 | Device and method for manufacturing speaker diaphragm, the diaphragm, and speaker A loudspeaker diaphragm manufacturing apparatus of the present invention comprises; a paper tank, a pulp dispersion reservoir tank connected to the paper tank, a stirring means provided in the paper tank, a water inlet unit connected to the paper tank, a drain unit ... | 10/10/2006 |
| 6929091 | Planar diaphragm loudspeaker and related methods A planar diaphragm loudspeaker for use in a suspended ceiling grid and related methods of manufacturing are provided. The loudspeaker includes a rectangular, planar diaphragm of polymer material sized to fill an opening of the ceiling grid. The front surface of the ... | 08/16/2005 |
| 6785397 | Electro-acoustic converter An electro-acoustic converter, comprising a barrel shaped diaphragm (2) formed about a longitudinal axis (3) and comprising first and second annular opposed ends (4, 5), and a first electrically driven vibration generator (6-11) fo... | 08/31/2004 |
| 6578661 | Speaker apparatus A speaker apparatus which can remove undesirable vibrations and can produce sounds of excellent quality of acoustic signals having high audio frequencies is presented by increasing a strength of a flat joint portion and by properly setting a mass ratio be... | 06/17/2003 |
| 6513623 | Speaker A frame (14) supporting a diaphragm (12) by its outer periphery is constructed by a connecting ring (30) and a base (28) which comprises a bottomed cylinder portion (28A) and a mounting portion (28B) which extends radially outward from the bottomed cylind... | 02/04/2003 |
| 6095278 | Base for holding the tweeter of a speaker A speaker base, which includes a tweeter holder having a holder base and a bottom mounting holder rod, and withholding ring mounted on the tweeter holder to hold a tweeter, wherein the tweeter holder has an axial center through hole through its holder bas... | 08/01/2000 |
| 5590211 | Microphone A microphone includes a voice coil, a membrane and a diaphragm that has an annular convex portion encircling a central convex portion and a concentric cutout portion on the central convex portion. The membrane covers the cutout portion and extends to the ... | 12/31/1996 |
| 5471437 | Electrodynamic acoustic transducer An electrodynamic transducer has a diaphragm substantially having two parts with different profiles, namely an acoustically active central part and an annular part laterally adjoining the central part and serving for the resilient suspension of the diaphr... | 11/28/1995 |
| 5339286 | Composite electroacoustic transducer The composite electroacoustic transducer for reproducing medium and high frequencies comprises a transducer assigned to reproducing midrange frequencies provided with a dome-shaped membrane which extends in an annular shape. A transducer assigned to repro... | 08/16/1994 |
| 5283397 | Diaphragm for electrodynamic transducer A diaphragm with moving coil for electrodynamic transducers has in the center thereof a spherically-shaped portion and adjacent to the spherically-shaped portion a toroidally-shaped zone which may be provided with corrugations. An outwardly diverging, tru... | 02/01/1994 |
| 5027411 | High frequency loudspeaker An improved loudspeaker assembly for frequencies higher than approximately 6 kHz, i.e., a tweeter assembly, is disclosed. The tweeter assembly includes a dome tweeter driver for delivering high frequency sound to a listener, and a cylindrical housing for ... | 06/25/1991 |
| 4847908 | Loudspeaker having a two-part diaphragm for use as a car loudspeaker An electrodynamic loudspeaker (1) has a diaphragm comprising a central part (2) and a peripheral part (3), and a voice-coil device (9, 10) coupled to the central part (2). The surface ratio S2 /S1 complies with the relationship 0.5рг... | 07/11/1989 |
| 4837839 | Compact speaker assembly with improved low frequency response A speaker transducer assembly is disclosed which includes first and second speaker diaphragms supported on a frame in over and under juxtaposition. Each of the speaker diaphragms has a central opening defining an inner periphery which is attached to a voi... | 06/06/1989 |
| 4796725 | Electrostatic transducer An electrostatic transducer which includes a vibrating membrane provided between a fixed electrode and a movable electrode to which electric signals are applied. The transducer further includes a plurality of depressions provided concentrically with a cen... | 01/10/1989 |
| 4532383 | Electroacoustic transducer having a variable thickness diaphragm To provide for good wide range frequency response utilizing only a single lightweight diaphragm in a peripherally-driven electroacoustic transducer, the diaphragm is made with a variable thickness. The region along the peripheral edge of the diaphragm is ... | 07/30/1985 |
| 4379951 | Electro-acoustic transducer means An electro-acoustic transducer has a planar annular diaphragm suspended at both the inner and outer periphery. The transducer component is situated within the inner periphery and interacts with the diaphragm via outwardly extending connections.... | 04/12/1983 |
| 4357498 | Coaxial type multi-way planar diaphragm loudspeaker system A coaxial type planar diaphragm loudspeaker system in which a plurality of coaxially arranged polygonal diaphragms are provided with separate magnetic circuits. Each magnetic circuit includes two parallel plate along each side of the diaphragm with a voic... | 11/02/1982 |
| 4320264 | Loudspeaker with a heat resistant two-part diaphragm A loudspeaker is disclosed in which the frustoconical diaphragm is formed in two parts, including a first or outer part made of synthetic material e.g. polypropylene or polystyrene, and a second or inner part of paper or plastic material having higher hea... | 03/16/1982 |
| 4315112 | Speaker An improved speaker is provided for stereo headsets and the like. The diaphragm for the speaker comprises the dome of an inverted polyester film cup centered within a flurocarbon film diaphragm member. The voice coil for the speaker is wound directly abou... | 02/09/1982 |
| 4225757 | Broad band dynamic loudspeaker A dynamic loudspeaker which operates over a wide band of audio frequencies is disclosed. The speaker includes a speaker cone and voice coil structure of very low mass. A configuration of ribs on the cone and dust cap is important to both high and low freq... | 09/30/1980 |
| 4146756 | Moving voice coil transducer with diaphragm having concentric sections of opposite curvature An electroacoustic transducer in which a diaphragm of a loudspeaker for converting an electrical signal into an acoustic signal comprises a lower section and an upper section thereof which are split axially of a center pole of a magnetic circuit. The lowe... | 03/27/1979 |
| 4132872 | Ribbed conical-central dome diaphragm with tapered thickness components A movable coil type electroacoustic vibrating plate of rigid structure, composed of two principal parts, one being a thin-walled annular plate portion, having concentrical outer periphery and inner periphery, of substantially truncated conical configurati... | 01/02/1979 |
| 4064365 | Loudspeaker assembly with restructured diaphragm including a tweeter driven by a bass amplifier A loudspeaker and enclosure which provides amplified bass sound. The assembly includes a conventional conical loudspeaker with one or more rings of plastic foam material bonded to the inside of the cone of the loudspeaker, and with each ring oriented in a... | 12/20/1977 |
