Patents Assigned to Bell-IRH Limited
  • High-temperature mineral-insulated metal-sheathed cable
    Patent number: 5030294
    Abstract: A mineral-insulated metal sheathed cable comprising at least one type K thermoelement and characterized in that the sheath alloy is of the following composition:______________________________________ Composition Element (wt. %) ______________________________________ Cr 10 to 40 Si 0.3 to 5.0 Mg 0.5 maximum Ce 0.3 maximum Mo 20 maximum W 25 maximum Nb 10 maximum Ta 8.0 maximum Ni remainder, apart from impurities.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: July 9, 1991
    Assignee: Bell-IRH Limited
    Inventor: Noel A. Burley
  • Thermocouples of enhanced stability
    Patent number: 4834807
    Abstract: A process for oxidation retardation in nickel-base thermocouple alloy comprises the step of initial heat-treatment of thermoelement wires at high temperatures in an atmosphere of very low oxygen partial pressure. The preferred nickel-base alloy is a type K or a type N alloy. The preferred atmosphere is a gas mixture selected from the group consisting of hydrogen/water vapour, and oxygen/argon.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: May 30, 1989
    Assignee: Bell-IRH Limited
    Inventor: Noel A. Burley