Patents by Inventor Joseph W. Walsh

Joseph W. Walsh 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: 5475311
    Abstract: An ionization gas analyzer system includes an ionization chamber including ionization electrodes contained therein. The ionization chamber contains a test gas or gas mixture. A high voltage generator is coupled to the electrodes and provides variable high voltage pulses to the ionization electrodes. An ionization voltage analyzer is coupled to the ionization chamber and receives ionization voltage information from the plurality of ionization electrodes in response to the variable high voltages pulses. The ionization voltage analyzer produces a gas code identifier in response to the plurality of ionization voltages by defining a code based on which of the ionization voltages exceed an arbitrarily established reference level ionization voltage. A single ionization electrode system can be used to determine a concentration of a particular gas.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: December 12, 1995
    Assignee: Motorola, Inc.
    Inventors: Frederick Y. Cho, Eric S. Johnson, Joseph W. Walsh
  • Patent number: 5119669
    Abstract: A sleeve unit for converting a liquid sample into a sample gas and for mixing the sample gas and a carrier gas into a uniform gas mixture and delivering the gas mixture to the inlet end of a capillary tube of a gas chromatograph comprises a tubular liner having a bore, an inlet expansion chamber in the bore for changing a liquid sample into a sample gas, a mixing chamber in the bore next to the inlet chamber, a spiral core baffle inside the mixing chamber for thoroughly mixing the sample gas and the carrier gas into a uniform gas mixture by guiding the sample gas and the carrier gas into a spiral path around the spiral core baffle between the baffle and the liner, and an outlet chamber next to the mixing chamber for delivering the thoroughly mixed sample and carrier gases to an inlet end of a capillary tube of a gas chromatograph.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: June 9, 1992
    Assignee: Restek Corporation
    Inventors: Paul H. Silvis, Joseph W. Walsh, David M. Shelow