Patents Assigned to W. H. Booth & Co., Ltd.
  • Method of producing sand mounds having a frozen surface
    Patent number: 4150704
    Abstract: A method of producing a mould of particulate material comprises admixing the particulate material with a controlled quantity of water, compacting the mixture to the required shape on a pattern or the like, removing the compacted mass from the pattern, and directing at at least the surface of the compacted mould to be contacted by molten metal a stream of coolant, whereby at least that surface is frozen to a depth sufficient to withstand the conditions imposed during the pouring of molten metal into the mould.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: April 24, 1979
    Assignee: W. H. Booth & Co., Ltd.
    Inventor: Frederick H. Hoult