Patents Assigned to Aerovox
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Patent number: 7206188Abstract: A self protected fluid filled capacitor that includes a capacitor section. Preferably, the capacitor section is configured to attach to a cover that can be placed on a capacitor housing. The capacitor contains an insulating fluid that surrounds the capacitor section when the capacitor section is inserted in the capacitor. A capacitor chamber that is configured to contain a retained portion of the insulating fluid and the capacitor section is also included. Also contained in the capacitor is an overflow chamber region in communication with the capacitor chamber. The capacitor chamber is configured to provide a capacitor chamber opening near a top portion, through which excess fluid contained in the capacitor chamber can flow. The overflow chamber region communicates with the capacitor chamber opening to receive excess insulating fluid, thereby providing a fluid volume margin to assure that the capacitor section is completely covered.Type: GrantFiled: March 8, 2005Date of Patent: April 17, 2007Assignee: AerovoxInventors: Edward M. Lobo, Leonid Zayaruzny
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Publication number: 20040141282Abstract: A capacitor of the type having a cathode and an anode and an electrolyte disposed between the cathode and the anode, the capacitor comprising an electrochemical cathode comprising an aluminum current collector coated with a finely divided material, an electrolytic anode comprising aluminum coated with aluminum oxide, an electrolyte in contact with the finely divided material on the cathode and the aluminum oxide on the anode.Type: ApplicationFiled: December 29, 2003Publication date: July 22, 2004Applicant: Aerovox Incorporated, a Delaware corporationInventor: Martin Hudis
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Publication number: 20040057194Abstract: A capacitor having an-electrochemical cathode electrode, an electrolytic anode electrode, and a substantially non-aqueous electrolyte disposed between the cathode and anode electrodes. The cathode includes a metal and a finely divided material, i.e. a conducting material with a very high ratio of surface area to volume. The anode includes an oxide forming metal and a corresponding metal oxide. The substantially non-aqueous electrolyte is in contact with the finely divided material forming a double layer electrochemical cathode capacitor. The cathode provides the foundation for interleaving a plurality of anodes with a plurality of cathodes. Insulating layers separate the interleaved anodes from the cathodes.Type: ApplicationFiled: August 12, 2003Publication date: March 25, 2004Applicant: Aerovox IncorporatedInventors: Martin Hudis, Robert Hutchinson, Nikola Marincic, Mulk Arora
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Publication number: 20030072128Abstract: A capacitor having an electrochemical cathode electrode, an electrolytic anode electrode, and a substantially non-aqueous electrolyte disposed between the cathode and anode electrodes. The cathode includes a metal and a finely divided material, i.e. a conducting material with a very high ratio of surface area to volume. The anode includes an oxide forming metal and a corresponding metal oxide. The substantially non-aqueous electrolyte is in contact with the finely divided material forming a double layer electrochemical cathode capacitor. The cathode provides the foundation for interleaving a plurality of anodes with a plurality of cathodes. Insulating layers separate the interleaved anodes from the cathodes.Type: ApplicationFiled: October 17, 2002Publication date: April 17, 2003Applicant: Aerovox Incorporated, a Delaware corporationInventors: Martin Hudis, Robert Hutchinson, Nikola Marincic, Mulk Arora
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Publication number: 20030011964Abstract: A capacitor of the type having a cathode and an anode and an electrolyte disposed between the cathode and the anode, the capacitor comprising an electrochemical cathode comprising a metal current collector, at least one conductive adhesion layer deposited on the metal current collector, a finely divided material deposited on the adhesion layer, an electrolytic anode comprising an oxide forming metal and a corresponding insulating metal oxide, and an electrolyte in contact with the finely divided material on the cathode and the oxide on the anode.Type: ApplicationFiled: June 11, 2002Publication date: January 16, 2003Applicant: Aerovox Incorporated, a Delaware corporationInventor: Martin Hudis
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Publication number: 20030007317Abstract: A capacitor of the type having a cathode and an anode and an electrolyte disposed between the cathode and the anode, the capacitor comprising an electrochemical cathode comprising an aluminum current collector coated with a finely divided material, an electrolytic anode comprising aluminum coated with aluminum oxide, an electrolyte in contact with the finely divided material on the cathode and the aluminum oxide on the anode.Type: ApplicationFiled: June 3, 2002Publication date: January 9, 2003Applicant: Aerovox Incorporated, a Delaware corporationInventor: Martin Hudis
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Publication number: 20020176221Abstract: A capacitor of the type having a cathode and an anode and an electrolyte disposed between the cathode and the anode, the capacitor comprising a cathode, an electrolytic anode comprising a stack of metal sheets, the sheets being coated with a metal oxide, wherein the metal sheets are electrically connected in parallel by one or more electrically conductive elements in electrical contact with the sheets, and an electrolyte in contact with the cathode and the metal oxide on the sheets.Type: ApplicationFiled: July 11, 2002Publication date: November 28, 2002Applicant: Aerovox Incorporated, a Delaware corporationInventor: Martin Hudis
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Patent number: 6208502Abstract: A capacitor having an electrochemical cathode electrode, an electrolytic anode electrode, and a substantially non-aqueous electrolyte disposed between the cathode and anode electrodes. The cathode includes a metal and a finely divided material, i.e. a conducting material with a very high ratio of surface area to volume. The anode includes an oxide forming metal and a corresponding metal oxide. The substantially non-aqueous electrolyte is in contact with the finely divided material forming a double layer electrochemical cathode capacitor. The cathode provides the foundation for interleaving a plurality of anodes with a plurality of cathodes. Insulating layers separate the interleaved anodes from the cathodes.Type: GrantFiled: July 6, 1998Date of Patent: March 27, 2001Assignee: Aerovox, Inc.Inventors: Martin Hudis, Robert Hutchinson, Nikola Marincic, Mulk Arora
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Patent number: 5717563Abstract: A metallized capacitor has two layers of electrically insulating film wound as a roll, two metal electrodes vacuum deposited on respective ones of the two layers of film, and two end-sprays of electrically conductive material deposited on respective ends of the roll, each of the end-sprays being in electrical contact with one of the two vacuum-deposited metal electrodes. Each of the metal electrodes has a segmented metallization pattern having segments of relatively thick electrode material separated by periodic segments of relatively thin electrode material so as to define a repeating pattern of relatively thick and relatively thin segments along the length of the layer of electrically insulating film on which the metal electrode is deposited.Type: GrantFiled: June 10, 1996Date of Patent: February 10, 1998Assignee: Aerovox IncorporatedInventors: Frederick W. MacDougall, Xiao Hui Yang, Ronald B. Rice
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Patent number: 5615078Abstract: A film capacitor in which the unmetallized margin is provided with a semiconductive layer. The layer provides a parallel resistive path within the capacitor, itself, obviating the need for an external resistor. It also grades the electric field across the margin, i.e., makes the field more uniform, thus allowing the margin to be made narrower without electrical breakdown, permitting a reduction in the physical size of the capacitor. A refractory, semiconductive layer is provided between the metal layer and the dielectric film. The refractory layer accelerates the self-clearing process, by insulating the underlying dielectric film from the heat generated by the vaporizing metal, thus hastening vaporization and reducing the tendency of the dielectric film to carbonize. As a result, faults are cleared with substantially less energy consumption. Preferably, the refractory layer is also semiconductive, to reduce field emission effects, and thereby decrease the frequency of faults in the dielectric film.Type: GrantFiled: December 16, 1994Date of Patent: March 25, 1997Assignees: Aerovox Incorporated, Toray Industries, Inc, Toray Plastics America, Inc.Inventors: Martin Hudis, Mamoru Koebisu, Kenji Hatada
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Patent number: 5559404Abstract: The invention features a capacitive pulse forming network including at least one capacitor having a substantially linear discharge characteristic and at least another capacitor having a nonlinear discharge characteristic. The capacitive pulse forming network allows the duration and shape of pulses generated by the network to be accurately controlled.Type: GrantFiled: June 21, 1995Date of Patent: September 24, 1996Assignee: Aerovox IncorporatedInventors: Frederick W. MacDougall, Xiao H. Yang
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Patent number: 5381301Abstract: A polymer-encased capacitor with a pressure sensitive interruption (PSI) system includes a polymer cover attached to a polymer case, the polymer cover having a skirt-less outer portion ultrasonically sealed to an open end portion of the polymer case. The polymer cover does not include flanged or lipped members extending from the outer edge of the cover (i e., "skirt-less") so that application of ultrasonic energy to the cover does not excite modes of vibration in which vibration nodes occur at intervals around the periphery of the cover, thereby providing a more leak-tight and rupture-proof bond between the capacitor case and cover.Type: GrantFiled: May 11, 1993Date of Patent: January 10, 1995Assignee: Aerovox IncorporatedInventor: Martin Hudis
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Patent number: 5349493Abstract: An electrical film capacitor in which a pair of metal film electrodes and a porous layer are wound into an assembly, and in which the porous layer serves to wick a liquid dielectric into the wound assembly. The liquid dielectric is an adipic acid ester such as di-isononyl adipate. Mono-isopropyl biphenyl can be added as well.Type: GrantFiled: December 18, 1992Date of Patent: September 20, 1994Assignee: Aerovox IncorporatedInventor: Paul Winsor, IV
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Patent number: 5160653Abstract: The present invention is directed to a liquid electrolyte for an electrolytic capacitor, as well as an electrolytic capacitor made therewith. The electrolyte includes a liquid solvent portion comprising one or more N-substituted pyrrolidones in the amount of at least 40% and water in the range of about 0.2 to about 8%. The electrolyte includes a solute portion comprising an amine salt and boric acid. The amine salt consists of a dicarboxylic acid and an amine. The dicarboxylic acid has 3 to 40 carbons and is present at a level of 0.1 to 4 moles per kilogram of solvent. The amine part is either a tertiary or secondary amine and is present at a level of about 0.2 to 4 moles of active amine nitrogen per mole of dicarboxylic acid. In addition to the above-described electrolyte, the electrolytic capacitor includes a pair of electrodes, at least one of which is composed of a film-forming metal.Type: GrantFiled: February 28, 1990Date of Patent: November 3, 1992Assignee: Aerovox M, Inc.Inventors: James A. Clouse, Brian J. Melody
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Patent number: 5148347Abstract: A polymer-encased capacitor with a nicked-wire interruption system has a capacitor element assembled onto a longitudinally-telescoping support member and installed in a polymer case so that one longitudinal end of the assembly rests on a surface of the case and the other longitudinal end is adjacent a retainer disk spaced at a predetermined longitudinal dimension between a point on the case and the cover of the case. A nicked-wire is attached to the capacitor element, protrudes through the retainer disk and is attached to an electrical terminal on a movable portion of the cover responsive to overpressure conditions in the case.Type: GrantFiled: May 9, 1990Date of Patent: September 15, 1992Assignee: Aerovox IncorporatedInventors: Michael E. Cox, Corrado Albertazzi, Heinz H. Findeisen, Russell E. Minkwitz, Jr.
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Patent number: 5019934Abstract: A capacitor in which the interruption mechanism includes an actuator that moves in response to a predetermined physical condition to cause electrical disconnection of the capacitive element, and in which the actuator has a range of motion through a limited number of stable positions and is mechanically pre-biased to move toward one of the stable positions when not already in one of the stable positions. In another aspect the capacitor housing includes an integral rim around the terminals that is filled with dielectric resin to insulate the terminals from the space surrounding the capacitor housing.Type: GrantFiled: January 29, 1990Date of Patent: May 28, 1991Assignee: Aerovox IncorporatedInventors: Jeffrey A. Bentley, Thomas A. Murphy
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Patent number: 4992905Abstract: An electrical device includes an electrical element; a container housing the electrical element; a rigid electrical terminal extending through a hole in a wall of the container; a bridge between the wall and the element, the bridge having an opening offset from an axis lying normal to the wall at the hole and the opening being aligned with a portion of the terminal; and an electrical connection made between the element and the terminal via the bridge opening, the connection being configured so that bulging of the wall causes the connection to break. Preferably, the container is a capacitor, and the electrical connection between the element and the terminal includes multiple separation points.Type: GrantFiled: November 21, 1988Date of Patent: February 12, 1991Assignee: Aerovox IncorporatedInventors: Frederick W. MacDougall, Pamela E. Hardy
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Patent number: 4975796Abstract: A device which enables a self-healing capacitor with more than one group of sections in series to undergo repetitive clearing without generating the resulting potential differences between the series sections which causes additional failures. In one embodiment, the device to conduct charge is a diode and resistor connected across each group of parallel sections so as to be nonconducting when the capacitor is charged but to become conducting when a clearing event occurs. An additional aspect of the device is a method for charging such a capacitor so that no section is overcharged.Type: GrantFiled: October 13, 1988Date of Patent: December 4, 1990Assignee: Aerovox IncorporatedInventor: Frederick W. MacDougall
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Patent number: 4975806Abstract: Briefly stated, the present invention is directed to a liquid electrolyte for an electrolytic capacitor, as well as an electrolytic capacitor made therewith. The electrolyte includes a liquid portion comprising an aprotic solvent at a level of at least about 90 percent by weight of the liquid portion. The electrolyte also includes ammonium borodisalicylate at a level of at least about 2 percent by weight of the total electrolyte. In addition to the above-described electrolyte, the electrolytic capacitor includes a pair of electrodes, at least one of which is composed of a film-forming metal.Type: GrantFiled: May 17, 1989Date of Patent: December 4, 1990Assignee: Aerovox MInventor: James A. Clouse
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Patent number: 4922375Abstract: An electrical capacitor having two capacitively coupled electrode structures, each electrode structure having first and second generally planar conductive portions respectively having higher and lower current-carrying capacity, the electrode structures having configurations and relative orientations such that a line normal to the first conductive portion of one electrode structure does not intersect the first conductive portion of the other electrode structure.Type: GrantFiled: January 3, 1989Date of Patent: May 1, 1990Assignee: Aerovox IncorporatedInventors: Frederick W. MacDougall, Paul Winsor, IV