Patents by Inventor Ben Grewcock

Ben Grewcock 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).

  • Cap assemblies for lamps
    Patent number: 4305637
    Abstract: In a lamp such as a GLS incandescent filament lamp the cap comprises a metal shell and an electrically insulating base, the base being formed in two parts preferably moulded of synthetic resin and formed to interfit with one another, of which the first part has passages for the lead-in wires from the lamp envelope such that the free ends of the wires lie between the first and second parts and the second part carries one or more electrical contact members to engage the lead-in wires and form the terminal(s) of the lamp.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: December 15, 1981
    Assignee: Thorn Electrical Industries Limited
    Inventors: Ben Grewcock, Arthur S. Vause, Frank Woodward