Patents by Inventor Daniel Clifford Carlson

Daniel Clifford Carlson 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: 9485649
    Abstract: A wireless mesh network includes a plurality of wireless devices and a gateway organized in a multi hop mesh topology. Each wireless device maintains and reports radio statistics to the gateway, and also reports battery conditions of its power source. The device manager communicates with the gateway and provides an alert indicating existence of a pinch point within the mesh network based upon the radio statistics. When a low battery condition is reported by a device, the device manager determines whether loss of that device is a pinch point or will cause a pinch point, and provides a low battery alert prioritized based upon the pinch point analysis.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: November 1, 2016
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Joseph Citrano, III, Daniel Clifford Carlson, Iain Peter Sharp, Mark Richard Ivison, Peter Hodgson, Kevin Andrew Shaw
  • Patent number: 8737244
    Abstract: A system for measuring and analyzing radio frequency power proximate and within a wireless field device mesh network. A centralized software module (CSWM) collects and analyzes values from one or more wireless devices of the wireless field device mesh network representing received RF power measurements on an assigned RF channel and values representing corresponding times of the received RF power measurements. Each wireless device measures received RF power on the assigned RF channel at times other than during reception of a signal resulting in transmission by the wireless device of either an acknowledgment signal or a non-acknowledgement signal. Values representing the received RF power measurements and the corresponding times of the received RF power measurements are determined from the stored received RF power measurements and corresponding times and then discarded. These values are stored within the wireless device until successfully reported.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: May 27, 2014
    Assignee: Rosemount Inc.
    Inventors: Eric Darrell Rotvold, Kelly Michael Orth, Daniel Clifford Carlson, Theodore Henry Schnaare, Joseph Citrano, III
  • Publication number: 20140086286
    Abstract: A wireless device comprises a plurality of diverse antennas, an accelerometer configured to determine an orientation of the wireless device, and a processor. The processor is configured to initially select a primary link configuration based on the determined orientation of the wireless device. The primary link configuration designates one or more of the plurality of diverse antennas and one or more diverse antennas of another wireless device configured to transmit the payload messages. The processor is further configured to receive payload messages using the primary link configuration, record a received signal strength indication (RSSI) value for the received payload messages, and periodically test RSSI for alternative link configurations. The processor compares RSSI between the primary link configuration and the alternative link configuration, and revises the primary link configuration if the comparison indicates that the alternative link configuration RSSI is greater than primary link configuration RSSI.
    Type: Application
    Filed: September 27, 2012
    Publication date: March 27, 2014
    Applicant: Rosemount Inc.
    Inventors: Brett Robert Morrison, Chad Michael McGuire, Daniel Clifford Carlson
  • Patent number: 8369880
    Abstract: Wireless devices are provisioned to join a wireless mesh network by writing an individual or common join key and network identification information to the wireless device, and creating an association of the wireless device with a gateway of the network by providing the gateway with a unique device identifier for the wireless device. The writing of the join key to the wireless device is achieved without revealing the join key to a user.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: February 5, 2013
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Joseph Citrano, III, Murray Frederic Freeman, Jeffrey Dale Potter, Daniel Clifford Carlson, Robert John Karschnia
  • Publication number: 20120134280
    Abstract: A system for measuring and analyzing radio frequency power proximate and within a wireless field device mesh network. A centralized software module (CSWM) collects and analyzes values from one or more wireless devices of the wireless field device mesh network representing received RF power measurements on an assigned RF channel and values representing corresponding times of the received RF power measurements. Each wireless device measures received RF power on the assigned RF channel at times other than during reception of a signal resulting in transmission by the wireless device of either an acknowledgment signal or a non-acknowledgement signal. Values representing the received RF power measurements and the corresponding times of the received RF power measurements are determined from the stored received RF power measurements and corresponding times and then discarded. These values are stored within the wireless device until successfully reported.
    Type: Application
    Filed: November 29, 2010
    Publication date: May 31, 2012
    Inventors: Eric Darrell Rotvold, Kelly Michael Orth, Daniel Clifford Carlson, Theodore Henry Schnaare, Joseph Citrano, III
  • Publication number: 20110164512
    Abstract: A wireless mesh network includes a plurality of wireless devices and a gateway organized in a multi hop mesh topology. Each wireless device maintains and reports radio statistics to the gateway, and also reports battery conditions of its power source. The device manager communicates with the gateway and provides an alert indicating existence of a pinch point within the mesh network based upon the radio statistics. When a low battery condition is reported by a device, the device manager determines whether loss of that device is a pinch point or will cause a pinch point, and provides a low battery alert prioritized based upon the pinch point analysis.
    Type: Application
    Filed: September 25, 2009
    Publication date: July 7, 2011
    Applicant: Fisher-Rosemount Systems, Inc
    Inventors: Joseph Citrano, III, Daniel Clifford Carlson, Iain Peter Sharp, Mark Richard Ivison, Peter Hodgson, Kevin Andrew Shaw
  • Publication number: 20090296601
    Abstract: Wireless devices are provisioned to join a wireless mesh network by writing an individual or common join key and network identification information to the wireless device, and creating an association of the wireless device with a gateway of the network by providing the gateway with a unique device identifier for the wireless device. The writing of the join key to the wireless device is achieved without revealing the join key to a user.
    Type: Application
    Filed: February 27, 2009
    Publication date: December 3, 2009
    Applicant: FISHER-ROSEMOUNT SYSTEMS, INC.
    Inventors: Joseph Citrano, III, Murray Frederic Freeman, Jeffrey Dale Potter, Daniel Clifford Carlson, Robert John Karschnia