Patents Assigned to Kockums AB
  • Shielded boat hull of composite material with sealed cover or the like and method of fastening the sealing device
    Patent number: 6205943
    Abstract: The invention relates to a boat or ship's hull, which is shielded against electronic radiation and comprises a cover (2) or the like for closing a hatch (3) in e.g. the deck (1) of the hull, and a sealing device for electric sealing of the closure of the cover at that part of the hull which surrounds the hatch. The hull and the cover comprise a composite (7, 9) containing fibers of an electrically conductive material, such as carbon fibers. The fibers reach the surfaces of the hull and the cover at the closure, where two sealing members (14, 15) included in the sealing device are fixed by lamination. The sealing members comprise flexible layered elements including fibers of the same kind of material as the fibers of the composite, for instance, textile bands of carbon fibers. The electric seal is kept closed by preferably non-laminated parts (20) of one of said sealing members being pressed against parts (21) of the second sealing member, e.g.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: March 27, 2001
    Assignee: Kockums AB
    Inventors: Anders Lönnö, Sven-Erik Hellbratt
  • Photoelectric dimension measuring system
    Patent number: 4555633
    Abstract: A method and a device for indicating the presence of an object in a measuring zone (E), and for objects having a measurable cross-sectional shape, also the extent of the object along a reference line (R). The method and device makes use of lines (A, B) of radiation emitters (11) and radiation receivers (12) located on opposite sides of the object, the receivers being fewer than the emitters. Created between the emitters and the receivers is a network of intersecting radiation paths in the measuring zone. An electronic unit (20) establishes which intersections (P.sub.1) of the radiation paths are screened-off by the object. The invention is useful for indicating the presence of objects with arbitrary cross-section when it is desired to determine a lower limit for the size an indicated object shall have, and to determine a diameter measurement, in particular in the saw mill industry.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: November 26, 1985
    Assignee: Kockumation AB, Remadivisionen
    Inventor: Mats Bjorkelund
  • Method of detecting cracks in constructions
    Patent number: 4481818
    Abstract: A process for monitoring the presence of cracks, formation of cracks and growth of cracks in constructions, for example off-shore oil and gas platforms, by recording and analysis of acoustic emissions from the construction, the sensors being mounted in the medium which surrounds the construction instead of on or in the construction itself.
    Type: Grant
    Filed: April 19, 1982
    Date of Patent: November 13, 1984
    Assignee: Kockums AB
    Inventor: Kjell A. Hellqvist
  • Aspirator system for sound emitters
    Patent number: 4480658
    Abstract: A fluid operated pressure oscillation generator having an additional inlet passage to permit removal of a cover.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: November 6, 1984
    Assignee: Kockumation AB
    Inventors: Charles E. Blakeslee, Ingemar Alsenfelt