Patents by Inventor Jeremy Charles Andrews

Jeremy Charles Andrews has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device for firing an electric detonator
    Patent number: 4037538
    Abstract: A device for firing an electric detonator which comprises a pressure deformable sealed waterproof housing containing an electric energy source of ignition of a detonator and means responsive to the deformation of the housing for actuating the energy source. The housing preferably comprises a bellows element and the energy source is preferably a piezoelectric element. The device is useful for multiple shot blasting wherein one explosive charge is initiated by the shock wave from a previously exploded charge.
    Type: Grant
    Filed: August 26, 1976
    Date of Patent: July 26, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: Jeremy Charles Andrews, Gordon Brian Roger Shannon
  • Device for firing an electric detonator
    Patent number: 3987729
    Abstract: A device for firing an electric detonator which comprises a pressure deformable sealed waterproof housing containing an electric energy source for ignition of a detonator and means responsive to the deformation of the housing for actuating the energy source. The housing preferably comprises a bellows element and the energy source is preferably a piezoelectric element. The device is useful for multiple shot blasting wherein one explosive charge is initiated by the shock wave from a previously exploded charge.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: October 26, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Jeremy Charles Andrews, Gordon Brian Roger Shannon