Critically Defined Material Or Lamination Patents (Class 381/426)
  • Patent number: 7849958
    Abstract: A Vibration system part for a speaker device includes a woven fabric or a non-woven fabric made of basalt fiber produced by twist yarn or roving yarn being a continuous long-fiber. The vibration system part for the speaker device may be a diaphragm, a center cap, an edge or a damper, for example. In a preferred example, the woven fabric or the non-woven fabric is impregnated with thermosetting resin or thermoplastic resin. Additionally, a lamination member, such as paper, foam material, resin or a film, is preferably laminated (coated) on the woven fabric or the non-woven fabric. Thus, the vibration system parts for the speaker device, having excellent acoustic property and reliability, can be obtained at a low price.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: December 14, 2010
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Masatoshi Sato, Satoshi Hachiya, Hiroyuki Kobayashi, Koji Takayama
  • Patent number: 7845461
    Abstract: An acoustic diaphragm includes a diaphragm formed of a uniform material and a first standing wave suppression member provided on a surface of the diaphragm along a first direction of passing through a center of the diaphragm.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: December 7, 2010
    Assignee: Victor Company of Japan, Limited
    Inventors: Satoshi Imamura, Junji Iino, Shinji Kamimura
  • Patent number: 7801324
    Abstract: A speaker apparatus comprises a dome type diaphragm comprising: a reinforcing rib; and an edge damper integrally formed with an outer periphery of the dome type diaphragm; and a frame supporting the dome type diaphragm through the edge damper. The reinforcing rib comprises at least one of a groove portion and a ridge portion. The reinforcing rib is extended radially with respect to the dome center portion from a vicinity of a dome center portion of the dome type diaphragm to a dome outer periphery side.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: September 21, 2010
    Assignees: Pioneer Corporation, Tohoku Pioneer Electronic Corporation
    Inventors: Yoshihiro Kimura, Masanori Ito
  • Patent number: 7726441
    Abstract: 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 material different from the polymer material forming the first and third laminated bodies in dynamic internal loss.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: June 1, 2010
    Assignee: Sony Corporation
    Inventors: Masaru Uryu, Yoshio Ohashi, Kunihiko Tokura
  • Patent number: 7708111
    Abstract: There is provided an acoustic diaphragm which includes a diaphragm base material composed of a paper article comprised of fine mica flakes, pulp fibers, and polyvinyl alcohol fibers and formed to be a multi-cellular structure; and a sheet material combined with the paper article or the diaphragm base material.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: May 4, 2010
    Assignee: Sony Corporation
    Inventors: Masaru Uryu, Kunihiko Tokura, Takahisa Tagami, Emiko Ikeda
  • Patent number: 7702124
    Abstract: The penetration of moisture and dirt often leads to a premature failure of electroacoustic miniature transducers that are used in hearing aids. A transducer membrane of a miniature transducer is provided at least in part with a hydrophobic and/or oliophobic and/or biofilm-inhibiting coating that, because its layer thickness is less than 10 ?m, does not significantly influence the acoustic characteristic of the miniature transducer, and that prevents degradation of the transmission characteristic due to moisture, or moisture-caused damage to the miniature transducer. In addition, the adherence of dirt particles is prevented.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: April 20, 2010
    Assignee: Siemens Audiologische Technik GmbH
    Inventors: Torsten Niederdraenk, Joseph Sauer
  • Patent number: 7686128
    Abstract: A speaker diaphragm includes a substrate and a surface material. The surface material is arranged on one side of the substrate, and includes a woven fabric of a polyethylene naphthalate fiber.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: March 30, 2010
    Assignee: Onkyo Corporation
    Inventor: Yushi Ono
  • Patent number: 7677355
    Abstract: On one surface of a piece of wooden sheet, a cloth or paper is adhered to make an adhered sheet. An approximately V-shaped notch is provided on the adhered sheet, the adhered sheet is wetted to be softened, and a lubricant which acts to keep water is impregnated thereinto. Edge portions of the notch are overlapped, and the adhered sheet is tentatively molded in an approximately horn shape by a first hot press molding. The adhered sheet is then dried, impregnated with thermosetting resin, and half-dried. The adhered sheet is subject to a second hot press molding. A moisture-proof agent is applied on the adhered sheet, a center hole for a voice coil and periphery are removed to make a speaker diaphragm having a predetermined dimension and shape.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: March 16, 2010
    Assignee: Victor Company of Japan, Limited
    Inventors: Satoshi Imamura, Takeshi Hirano, Tomoaki Ogata, Toshikatsu Kuwahata
  • Patent number: 7677356
    Abstract: An acoustic material includes at least a kind of synthetic staple fiber and a kind of low melting point fiber having a melting point lower than that of the at least one kind of synthetic staple fiber. Method for making the acoustic material includes the following steps: a) blending the synthetic staple fiber with the low melting point fiber together; b) cross lapping the mixed fibers to a predetermined thickness; c) drying the fibers to bond the fibers together.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: March 16, 2010
    Assignee: Foxconn Technology Co., Ltd.
    Inventor: Tsung-Lung Yang
  • Patent number: 7644801
    Abstract: A membrane (2) for an electroacoustic transducer (1) is disclosed, wherein a thickness (d) of said membrane (2) and an average Young's modulus (Eavg) of said membrane (2) are chosen in such a way that the critical load (Fbc), which causes the membrane (2) to buckle and/or crinkle, is increased compared to a reference membrane. The reference membrane made of Polycarbonate has the same shape, dimension, and stiffness in its direction of movement (MOV) as said membrane (2). According to the result of investigations on buckling and/or crinkling, said effect occurs with different critical buckling/crinkling loads for membranes of the same shape and dimension, but made of different materials, even when the stiffness of the membranes in their direction of movement—and hence their resonant frequency—is identical.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: January 12, 2010
    Assignee: NXP B.V.
    Inventors: Erich Klein, Ewald Frasl, Susanne Windischberger
  • Patent number: 7631723
    Abstract: A loudspeaker diaphragm having light weight and an excellent balance between a rigidity and an internal loss, and a simple and inexpensive method for manufacturing such a diaphragm are provided. The loudspeaker diaphragm includes a base layer having a woven fabric of a polyethylene naphthalate fiber impregnated with a thermosetting resin, and optionally a thermoplastic resin layer and/or a thermoplastic elastomer layer. The polyethylene naphthalate fiber is preferably an untwisted fiber. A fiber/resin weight ratio in the base layer is preferably in the range of 60/40 to 80/20. Preferably, the thermoplastic resin layer has a finely foamed structure and an average diameter of a cell in the finely foamed structure is 10 to 60 ?m.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: December 15, 2009
    Assignee: Onkyo Corporation
    Inventors: Yushi Ono, Toshihide Inoue
  • Publication number: 20090304225
    Abstract: The present invention provides a dome-shaped diaphragm fabricated based on a film base of polyethylene terephthalate resin film. The diaphragm includes a first vibrating part of a dome shape or a flat shape, and a second vibrating part of an annular shape. The second vibrating part includes a peripheral portion of the film base provided around a central portion of the film base. The first vibrating part includes the central portion of the film base, a thermosensitive adhesive resin film, provided on the central portion, and a fiber sheet made of a woven fabric using carbon fiber or an embossed nonwoven fabric. The fiber sheet is layered over the central portion with the thermosensitive adhesive resin film interposed therebetween.
    Type: Application
    Filed: May 12, 2009
    Publication date: December 10, 2009
    Applicant: HOSIDEN CORPORATION
    Inventors: Tomohiko KAMIMURA, Hideo Yuasa, Masahito Ikeda
  • Patent number: 7606387
    Abstract: A loudspeaker cone including a plated fabric is provided. The material of the loudspeaker cone is produced by laminating an interweaved plated fabric, and a light-weight and tough cloth together, and then a loudspeaker cone is produced by molding the material of the loudspeaker cone under high temperature and high pressure. The produced loudspeaker cone is light-weight, tough, pressure-resistant, not easily deformed, and can be used for a long term.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: October 20, 2009
    Inventor: Hiroshi Ohara
  • Patent number: 7567684
    Abstract: A speaker diaphragm 1 includes a first diaphragm portion 5, a second diaphragm portion 6 integrally molded with the first diaphragm portion 5, and a bobbin-receiving portion 7 protruding from a back side of a connecting portion between the first diaphragm portion 5 and the second diaphragm portion 6, with one end of a voice coil bobbin 2 being bonded to the bobbin-receiving portion 7. The bobbin-receiving portion 7 includes a first extension 8 extending backwards from the first diaphragm portion 5 and a second extension 9 extending backwards from the second diaphragm portion 6. A bobbin-receiving groove 10 is defined between the first extension 8 and the second extension 9. The voice coil bobbin 2 is inserted in and bonded to the bobbin-receiving groove 10.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: July 28, 2009
    Assignee: Onkyo Corporation
    Inventors: Yushi Ono, Sadatoshi Hisamoto, Takeru Inoue
  • Patent number: 7558399
    Abstract: It is an object of the present invention to provide a vibrating plate of a dynamic microphone and a method of manufacturing the vibrating plate. The vibrating plate includes a center dome and a sub-dome which includes a damping thin film having stable quality. Referring to FIG.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: July 7, 2009
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 7539324
    Abstract: A loudspeaker diaphragm includes a continuous coating on at least one surface of the diaphragm. The continuous coating may be non-uniform and may taper from a maximum in value in a conical region of the diaphragm to a minimum value in a cylindrical region of the diaphragm. The coating is formed in a single coating step without the need for use of a contact mask or interruption of the process to change process parameters. The tapered coating is formed by controlling the current density distribution within an electrochemical cell such that the rate of formation of the coating tapers from a first value in the conical region of the diaphragm to a second value is the cylindrical region of the diaphragm.
    Type: Grant
    Filed: July 4, 2003
    Date of Patent: May 26, 2009
    Assignee: Harman International Industries, Incorporated
    Inventors: Robert Polfreman, Michael Harris
  • Patent number: 7529382
    Abstract: A small and highly efficient loudspeaker, capable of handling high power, yet capable of being manufactured at reasonable cost, uses energy absorbing surfaces on a rear side of its diaphragm and as part of an enclosure that is integrated with its frame.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: May 5, 2009
    Inventor: Burton A. Babb
  • Patent number: 7483545
    Abstract: An acoustic diaphragm is disclosed having a plurality of acoustic elements supported by the diaphragm. In a preferred form, each element is coupled to a driver and extends radially at a uniform acute angle to a normal of the driver. In the preferred embodiment, a plural layer of the elements is arranged so that the direction of each element is out-of-phase relative to each other, preferably in the range of approximately ninety degree. An element is also supplemental to the conventional acoustic diaphragm. The improved acoustic diaphragm is used in electric acoustic and acoustic electric transducer systems having improved performance at wide frequency range.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: January 27, 2009
    Inventor: Tadashi Nagaoka
  • Patent number: 7467686
    Abstract: On one surface of a piece of wooden sheet, a cloth or paper is adhered to make an adhered sheet. An approximately V-shaped notch is provided on the adhered sheet, the adhered sheet is wetted to be softened, and a lubricant which acts to keep water is impregnated thereinto. Edge portions of the notch are overlapped, and the adhered sheet is tentatively molded in an approximately horn shape by a first hot press molding. The adhered sheet is then dried, impregnated with thermosetting resin, and half-dried. The adhered sheet is subject to a second hot press molding. A moisture-proof agent is applied on the adhered sheet, a center hole for a voice coil and periphery are removed to make a speaker diaphragm having a predetermined dimension and shape.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: December 23, 2008
    Assignee: Victor Company of Japan, Limited
    Inventors: Satoshi Imamura, Takeshi Hirano, Tomoaki Ogata, Toshikatsu Kuwahata
  • Patent number: 7466839
    Abstract: There is provided a speaker that uses a waterproof vibration plate that is obtained by forming a water repellent layer containing wax on a surface of paper pulp by the use of a wax-based emulsion in a suspension of the paper pulp, then forming a binder layer containing rosin or alkyl ketene dimmer on a surface of the water repellent layer by the use of a rosin sizing agent or an alkyl ketene dimmer sizing agent in the suspension, then forming an oil repellent layer containing a fluorinated resin on a surface of the binder layer by the use of a fluorine-based resin emulsion in the suspension, then forming the paper pulp into paper, and then heating and drying the same.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: December 16, 2008
    Assignee: OG Corporation
    Inventors: Kichiro Yasugahira, Ken Takahashi
  • Patent number: 7463749
    Abstract: Provided is a diaphragm edge of a speaker which is formed by compressing a material including silicon rubber and has an emboss portion on a front surface thereof so that sensitivity of sound is improved. Also, a diaphragm edge of a speaker is formed by compressing a material including silicon rubber and powdered viscose rayon and has an emboss on a front surface thereof.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 9, 2008
    Inventor: Jong-pyo Lee
  • Patent number: 7454032
    Abstract: A substrate (580) made by a thin magnesium plate having a thickness of at most 60 ?m and bent in a predetermined shape is subjected to anodic oxidation using an alkali-mixture aqueous solution containing metallic salt with a pH 12 or more so that porous anodic oxide coatings (571) are formed on the surfaces thereof. A first treated substrate (581) having the anodic oxide coatings (571) is immersed in a bath of a dye (571B), which fills the pores (571A) of the anodic oxide coatings (571) and dyes the substrate, providing a second treated substrate (582). The second treated substrate (582) is subjected to electrodeposition using electrodeposition paint made mainly of acrylic resin, forming electrodeposition coatings (572) on the anodic oxide coatings (571). A magnesium diaphragm is thereby produced, which is thin and has sufficient sensitivity and desired characteristics. The diaphragm thus dyed has metallic gloss and hence acquires a high decorative value.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: November 18, 2008
    Assignee: Pioneer Corporation
    Inventors: Hiroyuki Tomiyama, Masatoshi Sato, Satoshi Hachiya, Kouichi Honma
  • Patent number: 7443998
    Abstract: A speaker diaphragm which has a high rigidity and can improve sound transmission speed for better sound quality is provided. The speaker diaphragm contains fibers of 3 to 50 mm length mixed in matrix resin. The fibers are oriented radially from center to periphery in surface layers of the diaphragm, while they are oriented in different directions in a middle layer. After setting the resin, these fibers are fixed in the matrix resin with certain tension applied thereto.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: October 28, 2008
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventor: Satoshi Hachiya
  • Patent number: 7430297
    Abstract: A ribbon microphone includes a diaphragm made of an aluminum foil. To provide a corrosion resistance and a favorable electrical connection in the junction between the aluminum foil and backplates for a long time, a gold deposited film is formed on opposite surfaces of the diaphragm. Preferably, a gold deposited film is also formed on the inner surfaces of electrode plates attached to each end of the diaphragm.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: September 30, 2008
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Publication number: 20080152186
    Abstract: A composite membrane acoustic transducer structure comprising a magnet assembly is arranged adjacent the composite membrane material. The magnet assembly is arranged to produce a flux field. A first layer of thin, elongate composite membrane material is held under tension. A second conductive layer is attached to the first layer of composite membrane material wherein the first and second layers of membrane material are arranged adjacent, generally parallel and offset from the magnet assembly. The assembly is arranged to produce the flux field through at least part of the first layer and the second layer.
    Type: Application
    Filed: October 3, 2005
    Publication date: June 26, 2008
    Inventor: Robert J. Crowley
  • Patent number: 7386145
    Abstract: A liquefied paper material is used as raw materials. A paper frame member 1 supporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release hole 1a releasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member 1.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: June 10, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Teruho Yamada, Masahiko Kawahara, Yukio Sugimoto, Seiji Mori, Toshikazu Iwasaki
  • Patent number: 7344001
    Abstract: A speaker diaphragm includes a base material impregnated with a thermosetting resin composition. The base material includes a first surface material, a core material, and a second surface material in the stated order; the first surface material and the second surface material are each formed of a woven fabric or a non-woven fabric; and the core material is formed of a woven fabric or a non-woven fabric each including hollow fine particles.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: March 18, 2008
    Assignee: Onkyo Corporation
    Inventors: Toshihide Inoue, Hiroyasu Kumo
  • Patent number: 7311174
    Abstract: In a diaphragm for a loud-speaker of the present invention, an increase in tensile strength is averagely attained as a whole, and the over all diaphragm is uniformly colored without showing any lattice pattern. The diaphragm includes a woven fabric comprising yarns made from a blend of a plurality of fibers wherein at least one of the plurality of fibers is PBO (poly(p-phenylene benzobisoxazole)) fiber.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: December 25, 2007
    Assignee: Kabushiki Kaisha Kenwood
    Inventors: Junichi Hayakawa, Takaharu Ichiryu
  • Patent number: 7280668
    Abstract: This invention provides a method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and where the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) that is at least about 1 mil. thick. The invention further provides for a loudspeaker diaphragm, where the diaphragm is a composite material formed of at least two layers of ceramic material having a metal substrate therebetween and where the thickness of the metal substrate is no more than 86% of the thickness of the composite material.
    Type: Grant
    Filed: January 7, 2002
    Date of Patent: October 9, 2007
    Assignee: Harman International Industries, Incorporated
    Inventors: Allan O. Devantier, An D. Nguyen
  • Patent number: 7277556
    Abstract: It is an object to provide a vibrating plate of a dynamic microphone and a method of manufacturing the vibrating plate, the vibrating plate having a sub-dome and a center dome to which a voice coil is bonded by an adhesive. A mechanical intensity of the vibrating plate is increased without the vibrating plate formed to a double structure, as well as having an enhanced shock-resistance. According to FIG. 1e, a vibrating plate 1 of a dynamic microphone includes a center dome 10 with an electricity generating voice coil 30 and a sub-dome 20 connecting and communicating with the outer circumference of the center dome 10. The voice coil 30 is bonded to the center dome 10 with a first ultraviolet curing-resin 50 which has relatively high viscosity before hardening and relatively low hardness after hardening. A reinforcing resin layer 60a is integratedly formed in the inner surface of the center dome.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: October 2, 2007
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 7120263
    Abstract: A bending wave panel-form acoustic radiator formed from sheet material to define an acoustically active area and having at least one integral stiffening member in the form of a corrugation extending out of the plane of the sheet and at least partially across the acoustically active area of the radiator, which stiffening member is of substantially U-shaped cross section. Also disclosed is a method of making a bending wave panel-form acoustic radiator, comprising forming a sheet into a panel having at least one integral corrugation member extending out of the plane of the sheet and at least partly across the sheet and of substantially U-shape cross-section, to stiffen the sheet to have a desired ability to support and propagate bending waves.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: October 10, 2006
    Assignee: New Transducers Limited
    Inventors: Henry Azima, Martin Colloms, Graham Bank, Charles Bream, Julian Fordham
  • Patent number: 7092544
    Abstract: A molten resin is injected into a cavity together with long fibers. Opposite surfaces of the resin are solidified as a fiber-resin mixture temperature drops. These surface layers become non-foam layers. A foam layer is created between the non-foam layers. A pressure reduction process is applied to cause a spring back effect when the foam layer is created. A diaphragm having these three layers can be manufactured in an inexpensive process, but physical characteristics and appearances of the diaphragm are not sacrificed.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: August 15, 2006
    Assignees: Pioneer Corporation, Tohoku Pioneer Corp.
    Inventors: Satoshi Hachiya, Masatoshi Sato
  • Patent number: 7072485
    Abstract: A meshed etching tunnel made of aluminum is disposed inside a cylindrical quartz reactive chamber, and speaker diaphragms are aligned inside the tunnel at a certain interval. Opposing electrodes are disposed outside the reactive chamber. Plasma is applied at low temperature to prevent heat deformation. Uniform wettability is also assured by the use of the meshed etching tunnel, achieving high productivity. Uniform wettability further stabilizes bonding and improves bonding strength of the speaker diaphragm onto the voice coil and edge, offering a speaker with improved input power durability.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: July 4, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hitoshi Sato, Sinya Mizone, Kiyoshi Ikeda, Hiroko Yamazaki
  • Patent number: 7027609
    Abstract: 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.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: April 11, 2006
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Yoshimi Kudo, Junichi Sato, Akira Otake
  • Patent number: 7010143
    Abstract: A structure of a rectangular panel-form loudspeaker is provided. The structure includes a radiating panel, a transducer, a frame and a suspending unit. The radiating panel includes a rectangular laminated composite plate with length b and width a, and the laminated composite plate includes an intermediate core layer sandwiched between two fiber-reinforced polymeric layers. The transducer is used for exciting the radiating panel to produce flexural vibration. The transducer includes a voice coil assembly and a magnet assembly, wherein the voice coil assembly is coupled to a first side of the laminated composite plate at a first specified location. The frame is used for positioning the laminated composite plate and the magnet assembly. The suspending unit is made of a soft material and disposed between peripheral edges of the laminated composite plate and the frame.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: March 7, 2006
    Inventor: Tai-Yan Kam
  • Patent number: 6857501
    Abstract: A micromachined acoustic transducer comprising a parylene diaphragm piezoelectric transducer. The parylene diaphragm has far lower stiffness than the silicon nitride. The method for fabricating the parylene diaphragm acoustic transducer utilizes a prestructured disphragm layer utilizing silicon nitride which is compatible with high temperature semiconductor process. A silicon nitride layer is patterned and partially removed after forming the parylene diaphragm layer in order to enhance the structural qualities of the parylene diaphragm. The diaphragm may be flat or dome-shaped.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: February 22, 2005
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Cheol-Hyun Han, Eun Sok Kim
  • Patent number: 6845169
    Abstract: A speaker edge is molded of a rubber material with 0.1 wt % to 10 wt % short fibers added to the rubber material which ranges from 1.0 mm to 10 mm in length and are resistant to softening by heat, in which the short fibers are oriented to the radial direction of the edge.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: January 18, 2005
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventor: Toshihiro Ishigaki
  • Patent number: 6831985
    Abstract: To provide a piezoelectric speaker in which a breakdown of an electric lead terminal due to a large amount electric current flow is prevented an electric accident due to hand touch to an electrode and a frame is prevented, the precision of position and shape of the electrode formed by masking is enhanced, and the generation of buzz sound that becomes noise is prevented, side frames fixing side ends of a vibrating diaphragm are sectioned into upper and lower plates by the side ends formed in a corrugate shape, and a vibrating diaphragm supporting portions of the upper and lower plates are formed in the same corrugate shape as that of the side ends so that the side ends are clamped by the vibrating diaphragm supporting portions in the state of the corrugate shape of the vibrating diaphragm being maintained, and partitioning plates are inserted between the side frames to partition crests and troughs of the vibrating diaphragm.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: December 14, 2004
    Inventor: Toshitaka Takei
  • Publication number: 20040247152
    Abstract: The present invention relates to a process for producing a shaped diaphragm for electroacoustic transducers which comprises a core layer comprising poly(meth)acrylimide foam and at least one covering layer, which is characterized in that
    Type: Application
    Filed: January 23, 2004
    Publication date: December 9, 2004
    Inventors: Horst Greb, Roland Geduldig, Michael Deitrich, Torsten Jahn
  • Patent number: 6826285
    Abstract: A loudspeaker comprising a panel which is sufficiently stiff to support bending waves, the panel having a boundary, a transducer mounted to the panel to apply bending wave energy in the form of dispersive travelling waves thereto at a first location in response to an electrical signal applied to the transducer to cause the panel to vibrate and radiate an acoustic output, the loudspeaker having a frequency range extending from a lower frequency to a higher frequency and the panel having a stiffness giving a coincidence frequency above the lower frequency. Means on or associated with the panel at a second location attenuates travelling bending waves in the panel to prevent or at least substantially to moderate panel resonance.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: November 30, 2004
    Assignee: New Transducers Limited
    Inventor: Henry Azima
  • Publication number: 20040218780
    Abstract: Provided is a diaphragm edge of a speaker which is formed by compressing a material including silicon rubber and has an emboss portion on a front surface thereof so that sensitivity of sound is improved. Also, a diaphragm edge of a speaker is formed by compressing a material including silicon rubber and powdered viscose rayon and has an emboss on a front surface thereof.
    Type: Application
    Filed: February 20, 2004
    Publication date: November 4, 2004
    Inventor: Jong pyo Lee
  • Patent number: 6804371
    Abstract: 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 enhancing a viewing effect and aesthetic quality of the speaker. Thus, the laser vibration diaphragm may produce spatial variations by the difference of incident angles of the light, thereby obtaining a viewable strong sensation to the people, and thereby enhancing the viewing effect and aesthetic quality of the speaker.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: October 12, 2004
    Inventors: Mu-Sheng Liu, Long-Zheng Zhu, Ta-Yan Peng
  • Patent number: 6740202
    Abstract: A speaker diaphragm is formed from a material combining a fiber-type material and a ceramic-type-coating agent including metal alkoxide, metal hydroxide, and a colloidal or fine-particulate inorganic substance. The combining process for the ceramic-type-coating agent is performed before or after the fiber-type material is formed into a shape of the diaphragm.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: May 25, 2004
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation, Nippan Kenkyujo Co., Ltd.
    Inventors: Toshihiro Ishigaki, Hideo Sekikawa, Koji Maekawa, Tomoyuki Shimada
  • Patent number: 6724910
    Abstract: A transducer has a body having an outer region which is generally straight tapered in cross section and an inner region which is generally an arc of a circle in cross section. The inner and outer regions meet along a closed plane tangent curve. The outer region includes a decoupling region which extends around the outer region along at least one closed plane curve.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: April 20, 2004
    Assignee: Harman International Industries, Incorporated
    Inventors: Thomas P. Heed, Kirk R. Bristol, William J. Malinowski, Jr.
  • Publication number: 20040032966
    Abstract: 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 enhancing a viewing effect and aesthetic quality of the speaker. Thus, the laser vibration diaphragm may produce spatial variations by the difference of incident angles of the light, thereby obtaining a viewable strong sensation to the people, and thereby enhancing the viewing effect and aesthetic quality of the speaker.
    Type: Application
    Filed: August 13, 2002
    Publication date: February 19, 2004
    Inventors: Mu-Sheng Liu, Long-Zheng Zhu, Ta-Yan Peng
  • Patent number: 6694039
    Abstract: A loudspeaker having a cone made of magnesium-lithium alloy, comprising of a frame structure, having an expanded opening disposed at the front end and a magnetic element disposed at the rear end; a voice coil, disposed in the middle of the magnetic element; an damper, adhering to the voice coil; a cone, disposed on the inner diameter of the expanded opening of the frame structure and adhering to the voice coil; characterized in that the cone of the loudspeaker is formed by stamping the magnesium-lithium alloy under normal temperature, and the characteristics of the magnesium-lithium alloy material and the stamping process to produce the cone of the loudspeaker, which gives a better and planer sound pressure curve, a wider effective bandwidth, and a more beautiful metal color than the cone of the prior art loudspeaker within the audible frequency range.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: February 17, 2004
    Assignee: Meiloon Industrial Co., Ltd.
    Inventor: Wei-Chung Wu
  • Publication number: 20040022407
    Abstract: Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different methods of tensioning the diaphragm are provided for simplifying the manufacturing process and for assuring proper diaphragm tension.
    Type: Application
    Filed: May 2, 2003
    Publication date: February 5, 2004
    Inventors: John F. Steere, David B. Garner
  • Publication number: 20040008862
    Abstract: Electro-dynamic loudspeakers typically include a diaphragm that is secured to a frame and has a conductor applied to at least one surface of the diaphragm. The conductor is connected to a power amplifier for providing electric current through the linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The interaction between the current passing through the conductor and the magnetic fields cause vibration in the diaphragm that creates the sound that is heard from the electro-dynamic loudspeaker. Different methodologies of forming the conductor are provided for simplifying the manufacturing process and for locating the conductor closer to the magnetic field generated by the magnets.
    Type: Application
    Filed: May 2, 2003
    Publication date: January 15, 2004
    Inventor: David B. Garner
  • Publication number: 20030228029
    Abstract: A single end planar magnetic speaker system having at least one thin film, flexible diaphragm (72, 90) having a front side and a rear side for converting an input electrical signal into a corresponding acoustic output, the at least one diaphragm including a predetermined conductive region (76) and a predetermined non-conductive region; a magnetic structure (92) utilizing nonferite high energy magnets of a predetermined thickness wherein the magnets are each at least as wide as they are deep; the magnets having a magnetic strength wherein when compared to magnets of a ferrite type of same width as the nonferite high energy magnets but which have increased depth to yield at least nearly the same magnetic strength as the high energy magnets in the magnetic structure, doubling the depth of the high energy magnets in the magnetic structure, doubling the depth of the high energy magnets in the magnetic structure yields an increase in speaker sensitivity of at least 3 dB while the doubling the depth of the ferrite t
    Type: Application
    Filed: October 31, 2002
    Publication date: December 11, 2003
    Inventor: David Graebener
  • Publication number: 20030223613
    Abstract: A speaker diaphragm which has a high rigidity and can improve sound transmission speed for better sound quality is provided. The speaker diaphragm contains fibers of 3 to 50 mm length mixed in matrix resin. The fibers are oriented radially from center to periphery in surface layers of the diaphragm, while they are oriented in different directions in a middle layer. After setting the resin, these fibers are fixed in the matrix resin with certain tension applied thereto.
    Type: Application
    Filed: May 29, 2003
    Publication date: December 4, 2003
    Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventor: Satoshi Hachiya