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| Number | Title | Issue Date |
| 7775319 | Diaphragm for speaker and manufacturing method therefor A diaphragm for use in a speaker is manufactured using a plurality of thin wooden boards having flat rectangular shapes. The thin wooden boards are impregnated with a resin; then, a plurality of cutouts, which are elongated along wooden fiber directions or which are... | 08/17/2010 |
| 7726441 | Acoustic vibratory plate There is provided an acoustic vibratory plate having at least first to third laminated bodies layered. In the acoustic vibratory plate, the first and third laminated bodies are formed of a polymer material, and the second laminated body is formed of a polymer materi... | 06/01/2010 |
| 7332215 | Resin-molded component and method for manufacturing thereof as well as diaphragm for loudspeaker A resin-molded component such as a loudspeaker diaphragm, in which rigidity is enhanced while light weight and high specific modulus of elasticity are maintained, is formed by applying carbon dioxide gas with a predetermined pressure to a thermoplastic resin in whic... | 02/19/2008 |
| 7027610 | Loudspeaker A loudspeaker contains a hemispherical vibrator. The end portion of the hemispherical vibrator on the side opposite to the hemispherical curved surface is mounted on the main surface of a first circular baffle board. On the opposite side of the first baffle board fr... | 04/11/2006 |
| 7027609 | Diaphragm for speakers A diaphragm for a speaker comprises a metal cone 2 and a paper auxiliary cone 4 bonded integrally to the center portion of the metal cone 2. ... | 04/11/2006 |
| 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 |
| 6912288 | Piezoelectric electroacoustic transducer and manufacturing method of the same A piezoelectric electroacoustic transducer, including a plurality of piezoelectric layers deposited to define a deposited product, flexurally vibrates the deposited product by polarizing the entire piezoelectric ceramic layers in the same thickness direction and als... | 06/28/2005 |
| 6814181 | Electrically conductive damper device for speaker There is provided an electrically conductive damper device for a speaker in which local bending is reduced and break-downs of material of the damper and metallic wires incorporated in the damper are prevented, by additionally providing one or more sheets of damper f... | 11/09/2004 |
| 6804371 | Speaker having a laser vibration diaphragm A speaker includes a housing having a diffusion opening provided with a laser vibration diaphragm. The laser vibration diaphragm has reflective spatial patterns, so that the speaker may present multiple-image variations under different rays of light, thereby enhanci... | 10/12/2004 |
| 6790506 | Carbon fiber layer for acoustic diaphragm A structure of an acoustic diaphragm adapted to be used in a planar diaphragm speaker is provided. The structure includes a bottom carbon fiber layer and a top carbon fiber disposed on the bottom carbon fiber layer, wherein the fibers of the top carbon fiber layer a... | 09/14/2004 |
| 6742622 | Molded foam resin, process for forming the same and speaker diaphragm consisting of the same A molded foam resin, surface of which can be designed easily at low cost, a process for forming a molded foam resin, and a speaker diaphragm made of molded foam resin are provided, in which a molded foam resin is formed by injection molding of foaming agent-containi... | 06/01/2004 |
| 6644182 | Method of producing cone diaphragm having color patterns A method of producing cone diaphragm having color patterns includes steps of using a fiber-made thin sheet as a base material; printing the base material with a high molecular ink; soaking the printed base material in a high molecular resin material; or a... | 11/11/2003 |
| 6560348 | Contact connections The invention proposes a contact connection for sound reproduction devices according to the flexural wave principle. Since the drive systems 21 of such installations require high current intensities and such current intensities could only be properly tran... | 05/06/2003 |
| 6453049 | Acoustic diaphragm An acoustic diaphragm arranged to face a driving device of a loudspeaker is disclosed. The acoustic diaphragm comprises at least one laminated structure, one of which includes a first carbon fiber layer, a glue layer formed on the first carbon fiber layer... | 09/17/2002 |
| 6427017 | Piezoelectric diaphragm and piezoelectric speaker Disclosed is a piezoelectric diaphragm with a transparent piezoelectric member and a transparent electrode. Also disclosed is a portable electronic device that has a display means to display an image and a piezoelectric speaker having a transparent piezoe... | 07/30/2002 |
| 6334504 | Molded foam resin, process for forming the same and speaker diaphragm consisting of the same A molded foam resin, surface of which can be designed easily at low cost, a process for forming a molded foam resin, and a speaker diaphragm made of molded foam resin are provided, in which a molded foam resin is formed by injection molding of foaming age... | 01/01/2002 |
| 6332508 | Loudspeaker and method for producing the same The loudspeaker comprises a cone (2) and a beading (4) attached to the cone (2). The beading (4) is composed of a sprayable plastic layer which is soft in its solid state. The manufacture of the loudspeaker is facilitated by a process in which an open neg... | 12/25/2001 |
| 6275598 | Sound reproduction device The invention presents a sound reproduction device which operates in accordance with the flexural wave principle. Such devices have in common that a panel 10 is provided in which flexural waves are produced by a drive arrangement 16. The drive arrangement... | 08/14/2001 |
| 6247551 | Panel-form loudspeaker A panel-form loudspeaker has a resonant multi-mode radiator panel which is excited at frequencies above the fundamental frequency and the coincidence frequency of the panel to provide high radiation efficiency through multi-modal motions within the panel,... | 06/19/2001 |
| 6237716 | Standard-sized vibrating diaphragm speaker structure The invention herein of a standard-sized Vibrating Diaphragm speaker structure, primarily includes a stand with an enlarged opening in the front and a magnetic element in the rear, a cylinder inside a magnetic element, a spring panel sticking with a cylin... | 05/29/2001 |
| 6097829 | Fiber-honeycomb-fiber sandwich speaker diaphragm and method A composite loudspeaker diaphragm is disclosed having first and second substantially flat carbon fiber skins, and a honeycomb core sandwiched between the first and second carbon skins. In a preferred form, each carbon fiber skin comprises a sheet formed o... | 08/01/2000 |
| 6039145 | Diaphragm-edge integral moldings for speakers, acoustic transducers comprising same and method for fabricating same A diaphragm for speakers comprises a self-support, shaped body including a tightly woven synthetic polymer fiber cloth substrate which has, at least a diaphragm portion and edge portion shaped integrally with and extending from the diaphragm portion. The ... | 03/21/2000 |
| 6002648 | Slotted cylinder marine siesmic method and source A seismic method and system for generating seismic source energy in marine geophysical operations. A slotted housing is moveable by the actuation of piezoelectric elements to generate high power, low frequency seismic source signals. When the piezoelectri... | 12/14/1999 |
| 5796054 | Loudspeaker diaphragm A loudspeaker diaphragm is provided as an injection molded material including 50 to 80 weight % of a matrix resin of polyolefins and 20 to 50 weight % of flaky mica having an average aspect ratio of more than 10 and including at least 3 weight % or more o... | 08/18/1998 |
| 5793002 | Loudspeaker vibrating diaphragm and methods for its production A loudspeaker vibrating diaphragm with has a foam layer and two un-foamed skin layers formed on both sides of the foam layer. The average foaming magnification including the foam layer and two un-foamed skin layers is 1.1-3.0. The average foaming magnific... | 08/11/1998 |
| 5744761 | Diaphragm-edge integral moldings for speakers and acoustic transducers comprising same A diaphragm for speakers comprises a self-support, shaped body including a tightly woven synthetic polymer fiber cloth substrate which has at least a diaphragm portion and edge portion shaped integrally with and extending from the diaphragm portion. The d... | 04/28/1998 |
| 5473121 | Acoustic vibration plate An acoustic diaphragm employed in a speaker or the like and a method for producing the acoustic diaphragm are disclosed. A diaphragm substrate is a diaphragm exhibiting air permeability such as a paper diaphragm. The substrate is processed with filling by... | 12/05/1995 |
| 5425107 | Planar-type loudspeaker with dual density diaphragm A planar-type loudspeaker incorporating a substantially planar diaphragm constructed from a pre-expanded cellular plastic material, such as polystyrene, in which separate portions of the diaphragm have different densities. The higher density portion is de... | 06/13/1995 |
| 5380960 | Process for the preparation of films or diaphragms for acoustic applications Process for the preparation of films or diaphragms for acoustic applications, exhibiting improved vibration properties, and films or diaphragms obtained by this process, particularly diaphragms for electro-mechanical transducers, particularly for loudspea... | 01/10/1995 |
| 5352506 | Diaphragm The invention is intended to improve the durability and durability of a diaphragm of centrally convex form. A diaphragm comprises a substantially circular woven base fabric (1) formed of warp yarns (1a and 1a') radially extending in centrally convex form ... | 10/04/1994 |
| 5274199 | Acoustic diaphragm and method for producing same An acoustic diaphragm is obtained by forming micro-fibrillated cellulose into a web by a process similar to a paper-making process. The micro-fibrillated cellulose is the cellulose obtained by beating to the Canadian standard freeness of not more than 300... | 12/28/1993 |
| 5259036 | Diaphragm for dynamic microphones and methods of manufacturing the same A diaphragm for microphones having a laminate structure which imparts damping characteristics to the diaphragm is disclosed. The laminate comprises upper and lower resilient layers composed of a plastic film. The upper and lower layers constrain a center ... | 11/02/1993 |
| 5241140 | Speaker diaphragm A speaker diaphragm has a laminated construction in which a core layer is made of a porous diamond type wafer or wafers and sandwiched by a pair of surface layers made of diamond type material. Presence of numerous small pores in the core layer reduces th... | 08/31/1993 |
| 5205897 | Method of bonding loudspeaker diaphragm A loudspeaker component is bonded to a diaphragm formed of an olefinic resin, by applying an adhesion primer to bonding positions of the component and/or the diaphragm, applying an adhesive to the bonding positions after the primer has cured, and superpos... | 04/27/1993 |
| 5206466 | Diaphragm for speaker A speaker diaphragm includes a combined fiber paper made with crushed silk chips and a crushed bast fiber. In the preferred embodiment, the bast fiber is a natural Manila hemp fiber. The silk fiber contributes vibration damping to the diaphragm while the ... | 04/27/1993 |
| 5198624 | Audio transducer with controlled flexibility diaphragm An improved audio transducer includes a diaphragm having a pair of cylindrically-shaped webs that provide greater bandwidth, reduced distortion and greater horizontal dispersion of sound. The audio output of the transducer is further improved by forming t... | 03/30/1993 |
| 5162619 | Diaphragm for a loudspeaker A membrane for a loudspeaker is designed so as to facilitate manufacture and to improve the tone of the loudspeaker. The membrane consists of a first plastic film (5a) which serves to retain the shape and a second plastic film (56) laminated to the first ... | 11/10/1992 |
| 5148492 | Diaphragm of dynamic microphone There is a dynamic microphone comprising: a diaphragm which can vibrate by an acoustic wave and a voice coil which is joined to the diaphragm so as to transverse a magnetic field formed by the magnet and can vibrate integratedly with the diaphragm, wherei... | 09/15/1992 |
| 5080743 | Process for preparation of a wholly carbonaceous diaphragm for acoustic equipment use A process for preparing a wholly carbonaceous integrated diaphragm for acoustic equipment use comprises blending under application of high shearing force a mixture of one or more kinds of organic high polymeric substances carbonizable on baking and powder... | 01/14/1992 |
| 5072806 | Diaphragm for acoustic equipment A diaphragm for acoustic equipment wherein a surface-hardened layer of SiC film is formed on the surface of the diaphragm substrate comprising a completely carbonaceous film. Thus, the diaphragm for acoustic equipment having superior acoustic characterist... | 12/17/1991 |
