Class 181/168 - Metallic material

Subclass of Class 181 - Acoustics
Definition: Subject matter wherein the material of which the diaphragm
No. of patents: 34
Last issue date: 02/01/2011

Number	Title	Issue Date
7878297	Acoustic transducer made of pure beryllium with directed radiation, with a concave-shaped diaphragm, for audio applications, in particular for acoustic enclosures A loudspeaker for acoustic enclosure, in particular a tweeter or a medium-frequency loudspeaker, which consists of a spherical diaphragm with direct radiation, with a front side that is concave in relation to the spool, and onto which is attached at a certain level,...	02/01/2011
7287327	Electret capacitor microphone and method for producing the same A method for producing an electret capacitor microphone high in sensitivity and stable in acoustic characteristic. A PET film stretched with predetermined tension is bonded to a diaphragm support ring to perform stretch and fixation of a diaphragm to produce a diaph...	10/30/2007
7280668	Ceramic metal matrix diaphragm for loudspeakers 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 alumi...	10/09/2007
7236607	Loudspeaker with a first and a second diaphragm body A loudspeaker includes a frame, a diaphragm and an electric driving arrangement for moving the diaphragm along an axis with respect to the frame. The diaphragm includes an outer conical first diaphragm body and an inner conical second diaphragm body invertedly orien...	06/26/2007
6929092	Speaker diaphragm A speaker diaphragm that has a high heat-radiation efficiency. The speaker diaphragm includes a diaphragm main body made from a resin, and a metallic plate adhered to a major acoustic surface of the diaphragm main body adjacent a voice coil bobbin. The voice coil bo...	08/16/2005
6920230	Electromagnetic transducer and portable communication device An electromagnetic transducer includes: a first diaphragm; a second diaphragm provided in a central portion of the first diaphragm, the second diaphragm comprising a magnetic material having a first opening in a central portion thereof; a yoke disposed so as to oppo...	07/19/2005
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
6658326	Noise reduction system and method A noise reduction system reduces noise associated with an input signal provided to a control system, while substantially minimizing the adverse affect on the responsiveness and stability of the control system. The noise reduction system includes a process...	12/02/2003
6634456	Vibrating diaphragm of false speaker structure A kind of vibrating diaphragm of false speaker structure which includes a center piece with integrated formation directly on a larger outer diameter surface layer body, a connected suspended edge provided at the side way of the surface layer body in circl...	10/21/2003
6394224	Structure of speaker A speaker structure having a supporting base with a magnetic circuit in a lower portion, a sound cylinder with a tube with wires on one end, which one end is placed in the magnetic circuit and the other end is higher than the supporting base. A vibration ...	05/28/2002
6364966	Method for manufacturing acoustic vibration plate A method for manufacturing an acoustic vibration plate includes molding titanium metal into a shape of an acoustic vibration plate in order to obtain a titanium vibration plate, and performing a heat treatment on the titanium vibration plate by a ceramic-...	04/02/2002
6327372	Ceramic metal matrix diaphragm for loudspeakers A speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate with the percentage ratio of the thickness of the ceramic layers to the light metal substrate being in the ra...	12/04/2001
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
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
5406038	Shielded speaker Briefly, according to the invention, there is provided a shielded speaker. The speaker (10) has a diaphragm (18) coated with a metal layer (28). The coated diaphragm prevents the transmission of unwanted electromagnetic or radio frequency radiation from t...	04/11/1995
5251188	Elongated-pattern sonic transducer A sonic transducer (10) includes an elongated diaphragm (12) secured to a base (14) by a clamping member (16). The shapes of the surfaces (26, 30) by which the base (14) and clamping element (16) engage the diaphragm (12) are different at the end regions ...	10/05/1993
5135582	Method for forming a diaphragm and diaphragm The present invention is directed to a method for producing a diaphragm for highly brittle metals used in loudspeakers, comprising a step of making a laminated plate by stacking a plate of superplastic material on a plate of highly brittle metal. The lami...	08/04/1992
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
4726443	Diaphragm A diaphragm using a metal material applied with anodic oxide films, in which said metal material contains one of lead compounds, inorganic metal compounds and phosphor compounds at least to a portion in the micropores of the anodic oxide film....	02/23/1988
4713277	Foamed metal and method of producing same A foamed metal which has an apparent specific gravity of from 0.2 to 0.8 and comprises an aggregate of polygonal closed cells of from 2 to 10 mm in average diameter. The foamed metal is not only light in weight, free of directionality and structurally str...	12/15/1987
4709392	Dome speaker with a diaphragm having at least one elongated cut-out portion A dome speaker comprising a dome-shaped diaphragm formed of a highly rigid material such as titanium or a titanium alloy, and having at least one elongated cut-out portion which varies the rigidity of the diaphragm and prevents a dip in the anti-resonance...	11/24/1987
4655316	Acoustic diaphragm An acoustic diaphragm is made of metallic sheet material forming a raised pattern of the material and unraised sectors of the material. The diaphragm is of the dome-shaped variety. The raised pattern incorporates sets of raised strip elements. There is a ...	04/07/1987
4518443	Acoustic diaphragm An acoustic diaphragm formed of beryllium or an alloy composed mainly of beryllium. Said diaphragm has a crystal structure having its plane (1120) preferentially orientated in parallel with the surface of the diaphragm....	05/21/1985
4512435	Diaphragm for loudspeakers The present invention is directed to a diaphragm for loudspeakers which is integrally constructed through the combination of a core material being formed as a disc-shaped solid construction through the independent or series of combination of a plurality o...	04/23/1985
4484383	Method of manufacturing a speaker diaphragm A multi-layer block to be developed into a disk having a honeycomb construction is initially developed into a columnar block, and then the bottom of the columnar block is radially developed for obtaining a core of a speaker diaphragm. A suitable circular ...	11/27/1984
4470479	Method of making metal coated foil speaker diaphragm A speaker diaphragm of the present invention is prepared in a manner such that a boron layer is formed on one face of a dome-shaped metal foil by means of a physical vapor deposition method such as ion-plating, cathode sputtering, vacuum evaporation or th...	09/11/1984
4461930	Acoustic transducer with honeycomb diaphragm An acoustic transducer having a honeycomb-type diaphragm material, which transducer comprises a piezoelectric element and a driving element supported within a housing frame and acoustically attached by a coupling means to a honeycomb-type diaphragm, flat ...	07/24/1984
4351411	Speaker device A speaker device which comprises a diaphragm made of synthetic resin. The diaphragm is formed by injection molding and is plated with metal on both surfaces thereof for enhancing the rigidity against bending. The diaphragm is capable of vibrating as a who...	09/28/1982
4344503	Diaphragm for electro-acoustic transducer A diaphragm for electro-acoustic transducer which, as a component member, utilizes a layer of ceramics material, by which the E/.rho. ratio of the diaphragm can be increased, leading to an elevated resonance frequency of the diaphragm, whereby the limit f...	08/17/1982
4315557	Diaphragm for electro-acoustic transducer A diaphragm for electro-acoustic transducer comprising a core member of honeycomb structure made of either a thin film of a metal or a high molecular material, and a skin member bonded to at least one side of this honeycomb core structure and being prepar...	02/16/1982
4254184	Vibrating member for acoustic transducer and method for manufacturing the same A vibrating member made of a thin metal plate and adapted to be used in an acoustic transducer such as a loudspeaker or microphone is diffused at least partially with an inorganic substance to improve the acoustic characteristics thereof, particularly the...	03/03/1981
4216271	Composite diaphragm for speaker A composite diaphragm for a speaker comprises a boron layer formed on a metal foil such as titanium foil, in which a layer of a low melting point metal such as aluminum or magnesium is interposed between the metal foil and the boron layer to provide high ...	08/05/1980
4135601	Boron coated diaphragm for use in a loud speaker A diaphragm for use in a loud speaker is constructed of a substrate formed into a diaphragm configuration from a thin plate or a sheet composed of an organic or an inorganic substance, and a coating layer made of boron, or, an alloy of which a major compo...	01/23/1979

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Class 181/168 - Metallic material