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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 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 |
| 5701359 | Flat-panel speaker 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... | 12/23/1997 |
| 5689093 | Cone of a speaker The cone of a speaker which has fibers perpendicularly fastened thereto by an electrostatic fiber implanting apparatus to eliminate the reflection of transverse waves between the diaphragm and the peripheral flange of the cone.... | 11/18/1997 |
| 5663220 | Acoustic vibrational material from fiber-reinforced polybutadiene-modified epoxy resin This invention provides an acoustic vibrational material containing various fibers as the reinforcement material and having the epoxy resin as the matrix resin, wherein the epoxy resin is modified by a polybutadiene base elastomer containing not less than... | 09/02/1997 |
| 5581053 | Diaphragm of electroacoustic transducer and method of manufacturing the same A diaphragm of an electroacoustic transducer is made of a material including fibers taken out of young stems of bamboo grasses and preferably, used as the material is paper made by mixing the fibers taken out of young stems of bamboo grasses and wood pulp... | 12/03/1996 |
| 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 |
| 5432004 | Vibration plate of a speaker and method for producing same The present invention relates to a diamond vibration plate for a speaker having high sound velocity or E/.rho. and which is superior in high-pitched tone performance. Conventional, diamond vibration plates which are made overall from crystalline diamond w... | 07/11/1995 |
| 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 |
| 5329072 | Acoustic diaphragm An acoustic diaphragm comprising two or more laminated composite sheets, being formed into a shape with a curved surface. The composite sheet is made up of sliced wood and nonwoven fabric cloth consisting of adhesive resin, being stuck on backside of the ... | 07/12/1994 |
| 5293009 | Dust protection cap for conical loudspeaker A conical loudspeaker (10) has a dust protection cap (23) of hot-pressed polymer foam. Dust protection caps (23) made from this material are largely insensitive to finger pressure and can be attached to the conical speaker membrane using simple adhesives.... | 03/08/1994 |
| 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 |
| 5256837 | Paper cone for cone type speaker A cone formed from paper such as used in speaker as a diaphragm, wherein the wing portions, which may function to reinforce the cone, are selectively arranged and extending from any point in the periphery of the larger diameter circle to any point in the ... | 10/26/1993 |
| 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 |
| 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 |
| 5180785 | Diaphragm and method for producing same A diaphragm formed of a material for molding mainly composed of a uniform mixture of an ultra-high molecular weight polyolefin with a high melting viscosity and a polyolefin with a lower melting viscosity, wherein the ultra-high molecular weight polyolefi... | 01/19/1993 |
| 5102729 | Speaker diaphragm Disclosed are a speaker diaphragm formed from a polyamide resin reinforced with continuous fiber reinforcements and/or long fiber reinforcements, and a production method therefor. The speaker diaphragm has high internal loss and excellent specific modulus... | 04/07/1992 |
| 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 |
| 5031720 | Speaker diaphragm A speaker diaphragm is formed by heat-pressurized molding a composite structure of fabric cloth and resin sank into the fabric cloth. The fabric cloth is woven from high strength and high elasticity polyethylene fiber which has at least tensile modulus of... | 07/16/1991 |
| 4753969 | Diaphragm for electroacoustic transducer A diaphragm for an electroacoustic transducer comprising stratiform mineral of layers into which a hardener or an agent for facilitating hardening is adsorbed between the layers, thermosetting resin monomer, and carbonfibers which constitute a composite m... | 06/28/1988 |
| 4646874 | Loudspeaker diaphragm A felted paper loudspeaker diaphragm in which the felted paper of the annular supporting flange is thinner, and of lesser density and higher compliance than the cone body. The supporting flange is permeated with a high compliance elastomer which provides ... | 03/03/1987 |
| 4582163 | Electro-acoustic transducer with high air permeable diaphragm An electro-acoustic transducer comprising a diaphragm (1) and means for shifting the high-frequency roll-off of the frequency-response characteristic of the transducer towards lower frequencies. This is accomplished by making the diaphragm (1) permeable t... | 04/15/1986 |
| 4562899 | Diaphragm of electroacoustic transducer and method of manufacturing the same A diaphragm of a loudspeaker is made up of a plurality of laminated composite sheets each including a number of fibers, for example, carbon fibers having a high Young's modulus to density ratio, and a matrix bonding together the fibers. Each composite she... | 01/07/1986 |
| 4552243 | Diaphragm material for acoustical transducer An improved diaphragm material for use with an acoustical transducer, such as a moving-coil electrodynamic loudspeaker and a loud speaker containing such diaphragm, which diaphragm comprises a formed, self-supporting, woven carbon fiber cloth material opt... | 11/12/1985 |
| 4518642 | Loudspeaker diaphragm and method for making same A loudspeaker diaphragm is disclosed which is formed of a slurry of cellulose fibers and polypropylene fibers. In the fabrication of the diaphragm, a felt is made of the slurry, and the felt is subjected to sufficient heat and pressure to fuse the polypro... | 05/21/1985 |
| 4478309 | Speaker equipped with diaphragm filled with foamed resin A speaker provided with a diaphragm having a foamed resin body of relatively low density on its front surface includes a thin sheet of foamed resin applied to its surface. The thin sheet of foamed resin has relatively high flexural rigidity and is imperme... | 10/23/1984 |
| 4472543 | Flame retardant diaphragm for acoustic transducers A flame retardant diaphragm for speakers, etc. comprises an admixture of natural fibers and inorganic fibers. The admixture is impregnated with a thermosetting resin and an organic bromine compound, and heat-treated under pressure. The organic bromine com... | 09/18/1984 |
| 4460060 | Vibratory diaphragm for loudspeaker This is a vibratory diaphragm for a loudspeaker of sound appliances such as stereophonic phonographs or television receivers, which is made of composite material composed of polyimide resin, graphite granules and fabric of high strength and high modulus f... | 07/17/1984 |
| 4451609 | Flame-retarded acoustic diaphragm A flame-retarded speaker diaphragm is prepared by making a cone from cellulose fibers, impregnating the cellulosic cone with a solution of a trimethylol melamine monomer, an organic phosphorus- and nitrogen-containing compound, and a trialkyl amine cataly... | 05/29/1984 |
| 4410768 | Electro-acoustic transducer In an electro-acoustic transducer in a loud speaker and like devices, a diaphragm and/or a voice coil bobbin is or are formed by a composite material consisting of a foamed resin containing reinforcing fibers. Such diaphragm has a large Young's modulus-to... | 10/18/1983 |
| 4377617 | Loudspeaker diaphragm and process for producing same A dome-shaped diaphragm for loudspeakers comprising a substrate fabric of synthetic fiber, a poly-urethane elastomer film for giving airtightness to the substrate fabric, and a viscoelastic resin adhesive adhering the fabric and the film together.... | 03/22/1983 |
| 4359132 | High performance speaker diaphragm The disclosure is of a high performance speaker diaphragm which comprises needled and interlocked textile staple fibers of a first, relatively heat-resistant fiber and a second, heat-softenable fiber. The fibers are molded together to soften the second fi... | 11/16/1982 |
| 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 |
| 4291781 | Speaker diaphragm and method of preparation of the same A diaphragm for a speaker which is prepared by heating a conjugated sheet obtained by paper-making polyethylene short fibers with other short fibers which have a high modulus of elasticity, such as carbon fiber, to melt and solidify polyethylene short fib... | 09/29/1981 |
| 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 |
| 4086449 | Loudspeaker with burning resistant diaphragm The invention discloses a loudspeaker with a diaphragm made of pulp fibers treated with a chemical condensation product of an ammonium salt of a polyphosphoric acid having a high degree of condensation with polyethyleneimine. The diaphragm has burning res... | 04/25/1978 |
| 4076098 | Loudspeaker diaphragm This invention relates to loudspeaker diaphragms and methods of making such diaphragms. It is an object of the invention to improve damping of standing waves formed in a loudspeaker diaphragm. To this end a diaphragm in accordance with the invention is ma... | 02/28/1978 |
| 4003449 | Planar diaphragm A planar diaphragm, preferably for loudspeakers where, on the rear face side there is an asymmetrically shaped sound producing portion, surrounded by marginal and channel shaped portions to assure that sound waves generated by said sound producing portion... | 01/18/1977 |
| 3946832 | Diaphragm for loud speaker A diaphragm for a loud speaker is manufactured by impregnating a diaphragm blank made of natural or man-made fibers or formed by molding a synthetic resin, with a water-soluble inorganic flame retarder, and thereafter with an aqueous solution of a fluorin... | 03/30/1976 |
