Patents Assigned to Aerovox M, Inc.
  • Electrolytic capacitor and electrolyte therefor
    Patent number: 5160653
    Abstract: 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: Grant
    Filed: February 28, 1990
    Date of Patent: November 3, 1992
    Assignee: Aerovox M, Inc.
    Inventors: James A. Clouse, Brian J. Melody
  • Method of forming electrical termination on capacitor tops
    Patent number: 4841608
    Abstract: Capacitor bodies are usually carried in open ended containers. The open ends are then closed with a cover or capacitor top after the capacitor body is inserted in the container. Electrical leads are then attached to terminals carried by the capacitor top. Prior art methods of forming such tops involved insert molding. The present invention starts with a preformed plastic disc with two apertures for terminals and a boss for positioning lead attachment. The terminals and a positioning lead are then applied to the disc through a combination of riveting and ultrasonic swaging.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: June 27, 1989
    Assignee: Aerovox M, Inc.
    Inventors: C. Wayne Hodges, Dennis R. Henderson, Edwin R. Koons
  • Electrolytic capacitor and electrolyte therefor
    Patent number: 4812951
    Abstract: An electrolytic capacitor includes a pair of electrodes, one of which is composed of a film-forming metal and an electrolyte comprising substantially one volume of dimethyl sulfoxide and substantially three volumes of a member of a solvent group consisting of N-ethyl-2-pyrrolidone, N-methyl pyrrolidone, butyrolactone, propylene carbonate and substituted cyanamides such as di-ally cyanamide, and mixtures thereof. Preferably the electrolyte also includes from 3 volume % to 10 volume % phosphoric or phosphorous acid and an ionogen, such as an amine salt.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: March 14, 1989
    Assignee: Aerovox M, Inc.
    Inventors: Brian Melody, James A. Clouse