Patents by Inventor Katsumi Sugaja

Katsumi Sugaja 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 operation of a discharge lamp of the short arc type
    Patent number: 7382093
    Abstract: A device for operating a discharge lamp of the short arc type having a feed device which supplies a direct current to the discharge lamp when operation starts and an alternating current afterwards, in which the feed device supplies a direct current which is smaller than the rated current to the discharge lamp at the start of operation, and a direct current which is at least as large as the rated current, afterwards. A control which ascertains whether the discharge lamp at the start of operation is in a hot or cold start operating state, and which establishes one of the following parameters based on whether the hot or cold operating state ascertained to exist: the value of the direct current which is at least as great as the rated current; the feed duration of the direct current which is at least as great as the rated current.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: June 3, 2008
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Yoshikazu Suzuki, Tomoyoshi Arimoto, Katsumi Sugaja
  • Device for operation of a discharge lamp of the short arc type
    Publication number: 20060108949
    Abstract: A device for operating a discharge lamp of the short arc type having a feed device which supplies a direct current to the discharge lamp when operation starts and an alternating current afterwards, in which the feed device supplies a direct current which is smaller than the rated current to the discharge lamp at the start of operation, and a direct current which is at least as large as the rated current, afterwards. A control which ascertains whether the discharge lamp at the start of operation is in a hot or cold start operating state, and which establishes one of the following parameters based on whether the hot or cold operating state ascertained to exist: the value of the direct current which is at least as great as the rated current; the feed duration of the direct current which is at least as great as the rated current.
    Type: Application
    Filed: November 18, 2005
    Publication date: May 25, 2006
    Applicant: Ushiodenki Kabushiki Kaisha
    Inventors: Yoshikazu Suzuki, Tomoyoshi Arimoto, Katsumi Sugaja