Patents by Inventor John D. Haden

John D. Haden 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).

  • Patent number: 4812623
    Abstract: An arrangement including an appliance and an optional support. The electrical appliance has a vessel; an electrical device is mounted centrally on the bottom of the vessel together with an electrical control so as to be protected in a hollow base below the bottom. Mechanical actuator mechanism extends from the base to a position convenient for manual actuation. The base may be stood on the support so that electrical terminal pins engage in electrical supply sockets in the support, and the support may incorporate a supply switch to isolate the sockets when the appliance is lifted.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: March 14, 1989
    Assignee: D. H. Haden Limited
    Inventors: John D. Haden, Eric Duxbury
  • Patent number: 4707042
    Abstract: Electrical socket apparatus, for example, for safety supporting and supplying electricity to an electrical appliance, which are provided with at least live and neutral terminal pins. The apparatus includes locating means which are engageable by the electrical appliance to locate the appliance in a predetermined position, live and neutral sockets to receive the live and neutral terminal pins, electrical conductors in the sockets, switch means which are actuable by the electrical appliance being placed in a predetermined position to make an electrical connection to at least one of the electrical conductors, and a displaceable member which projects into the sockets and is movable against a bias to actuate the switch means, to prevent risks, e.g. electric shocks and overheating of contacts, and to hinder misuse of the apparatus.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: November 17, 1987
    Assignee: D.H. Haden Limited
    Inventor: John D. Haden