Patents by Inventor Geoffrey M. Spence

Geoffrey M. Spence 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).

  • Energy conversion system
    Patent number: 4772816
    Abstract: The apparatus uses a magnetic field (80) to accelerate a charged particle radially towards a target electrode (10). The increased kinetic energy of the particles enables the particle to give up more electrical energy to the target electrode (10) than was initially given to it. This charges the target electrode (10), and the increased energy is extracted from the apparatus by connecting an electrical load between the target electrode and a point of lower or higher potential.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: September 20, 1988
    Assignee: Energy Conversion Trust
    Inventor: Geoffrey M. Spence
  • Process for producing tubular articles
    Patent number: 4198843
    Abstract: A cold working process for the manufacture of a hollow tubular metal article having a shaped head, the process comprising: (a) supporting an open-ended hollow metal tube on a first forming tool with one end of the tube projecting beyond the end of the tool, (b) initially necking the projecting end of the tube in a necking die, and thereafter, with the necked tube held in the die by the first forming tool, (c) compressing the necked portion of the tube between the first forming tool and a second forming tool to form the shaped head.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: April 22, 1980
    Inventor: Geoffrey M. Spence