Patents by Inventor Thomas D. Farrell

Thomas D. Farrell 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: 4249103
    Abstract: An electrical igniter device for a combustion apparatus such as a gas turbine comprises a unitary tubular conductive shell into which an assembly of coaxially arranged ingniter components are breech loaded. A spark electrode and a terminal extension are positioned in electrical contact within a hollow electrode insulator in the assembly. The electrode insulator is longitudinally positioned in the device between an internal shoulder in the shell and a removable retaining sleeve. The retaining sleeve is in turn held in position against the electrode insulator by an end coupling which is threaded into the breech end of the shell. An external lead connected to the end coupling transmits an electrical charge through the coupling to the shell. Inwardly extending tabs formed off the end of the shell opposite the breech end, together with the spark electrode within the shell, define a spark gap.
    Type: Grant
    Filed: February 2, 1979
    Date of Patent: February 3, 1981
    Assignee: General Electric Company
    Inventor: Thomas D. Farrell