Patents by Inventor Darrell E. Johnson

Darrell E. Johnson 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).

  • Apparatus for monitoring gas concentrations
    Patent number: 6828910
    Abstract: A patient monitoring system has a patient monitor with a screen and mainstream gas input connector configured to receive a mainstream gas concentration signal from a mainstream gas analyzer. A sidestream gas analyzer has an output connector and is configured to transmit a sidestream gas concentration signal via the output connector. The patient monitor receives the sidestream gas concentration signal via the mainstream gas input connector for display on the screen.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: December 7, 2004
    Assignee: GE Medical Systems Information Technologies, Inc.
    Inventors: Patrick Allen VanRyzin, Michael J. Palmer, Darrell E. Johnson, William James Sheets
  • APPARATUS FOR MONITORING GAS CONCENTRATIONS
    Publication number: 20040207529
    Abstract: A patient monitoring system has a patient monitor with a screen and mainstream gas input connector configured to receive a mainstream gas concentration signal from a mainstream gas analyzer. A sidestream gas analyzer has an output connector and is configured to transmit a sidestream gas concentration signal via the output connector. The patient monitor receives the sidestream gas concentration signal via the mainstream gas input connector for display on the screen.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Applicant: GE Medical Systems Information Technologies, Inc.
    Inventors: Patrick Allen VanRyzin, Michael J. Palmer, Darrell E. Johnson, William James Sheets
  • Method for supervising a switch
    Patent number: 5341029
    Abstract: The invention relates to a method for the supervision of a switch, in which a switch supervision signal (CA1, CA2, CB1, CB2) is generated and transmitted to the switch contact to be supervised, and in which the switch supervision signal (CA1, CA2, CB1, CB2) returning from the switch contact is detected and compared with the emitted signal. A coded signal is used as switch supervision signal (CA1, CA2, CB1, CB2) and this coded signal is transmitted serially to the switch contact to be supervised.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: August 23, 1994
    Assignee: Erwin Sick GmbH Optik-Elektronik
    Inventor: Darrell E. Johnson
  • Rail grinder
    Patent number: 4779384
    Abstract: A rail grinder vehicle includes a series of connections between grinders and a chassis frame such that pairs of the grinders may be operated in an independent mode allowing separate movement and in wave control mode wherein the pair of grinders are coupled together for movement in unison. The grinders are supported from a K frame which is pivotably mounted at the center of the vehicle for stability. Each grinder is mounted upon a grinder support element and associated structure such that the grind stone of the grinder may be positioned relative to the rail and will automatically and simultaneously orient the grinding face of the grind stone at a proper angle relative to the rail corresponding to the desired position. A control system including a hydraulic system which is controlled by an electrical system is used to operate the grinders and maintain the individual grind motors at a constant power during grinding in an independent mode.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: October 25, 1988
    Assignee: Harsco Corporation
    Inventors: John J. Shoenhair, Darrell E. Johnson, Richard J. Gitter, Bernard C. Lancette, Winfred C. Croft