Patents by Inventor Daniel A. Poulson

Daniel A. Poulson 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: 5159244
    Abstract: A starter circuit is supplied with 120 volt 60 Hz power, and is coupled to a gas discharge lamp having in an interior thereof a gas and two spaced electrodes. When the starter circuit applies to the electrodes a voltage in excess of a threshold voltage, the lamp transitions from a non-conductive state in which no visible light is emitted to a conductive state in which visible light is emitted. The starter circuit includes several voltage doubler circuits coupled in series with each other between the electrodes of the lamp to form a voltage multiplier circuit. When the lamp is in its non-conductive state, the voltage doubler circuits each output a substantially DC voltage which is twice the maximum potential of the 120 volt input signal so that the voltage multiplier as a whole applies to the electrodes a significant DC voltage in excess of the threshold voltage so that the lamp transitions from its non-conductive state to its conductive state.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: October 27, 1992
    Inventor: Daniel A. Poulson
  • Patent number: 4066311
    Abstract: Apparatus for testing, cleaning, and rejuvenating three gun, color television, cathode ray picture tubes is disclosed. The apparatus shown permits the cleaning and rejuvenating procedures to be performed separately and on selected, individual ones of the cathode ray tube guns so that these procedures need be carried out only on those guns actually requiring them. The apparatus includes a great deal of flexibility and, in particular, its full capabilities may be used even with cathode ray tubes having the control grids of the separate guns connected together in parallel.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: January 3, 1978
    Assignee: Heath Company
    Inventor: Daniel A. Poulson