Patents by Inventor Daniel A. Sebald

Daniel A. Sebald 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).

  • Power supply with improved inrush circuit for limiting inrush current
    Patent number: 5886892
    Abstract: A new and improved rectifier power supply operates in a low voltage mode of operation and a high voltage mode of operation without user intervention and includes an inrush current limiting device that is in circuit during a predetermined period of time during start up and bypassed during steady state operation in the low voltage mode of operation. In the high voltage mode of operation, when inrush current is reduced relative to the low voltage mode of operation, the inrush limiting device always remains in circuit. As there is no power loss associated with the inrush limiting device in the steady state low voltage mode of operation, the power supply has an improved efficiency and reliability and a reduced cost as it can be rated for continuous operation only in the high voltage mode of operation when the input current is lowest and device dissipation is least.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: March 23, 1999
    Assignee: Hewlett-Packard Company
    Inventors: Thomas G. Radley, Daniel A. Sebald