Patents by Inventor Clarence E. Holmstadt

Clarence E. Holmstadt 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).

  • Process transmitter with thermal fluid detection for decreasing damage to the process transmitter components
    Patent number: 11002582
    Abstract: A process transmitter includes a transmitter housing and a liquid detector coupled to the transmitter housing. The liquid detector includes a temperature sensor configured to generate signals indicative of a presence of liquid within the transmitter housing. The process transmitter also includes a controller coupled to the liquid detector configured to receive the generated signals, determine the presence of liquid within the transmitter housing based on the received signals, and generate an output indicative of the determined presence of liquid within the transmitter housing.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: May 11, 2021
    Assignee: Rosemount Inc.
    Inventor: Clarence E. Holmstadt
  • ELECTRONICS HOUSING WITH THERMAL FLUID DETECTION
    Publication number: 20200103264
    Abstract: A process transmitter includes a transmitter housing and a liquid detector coupled to the transmitter housing. The liquid detector includes a temperature sensor configured to generate signals indicative of a presence of liquid within the transmitter housing. The process transmitter also includes a controller coupled to the liquid detector configured to receive the generated signals, determine the presence of liquid within the transmitter housing based on the received signals, and generate an output indicative of the determined presence of liquid within the transmitter housing.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Inventor: Clarence E. Holmstadt
  • Industrial process control transmitter with multiple sensors
    Patent number: 8311778
    Abstract: An industrial process control transmitter includes a first input configured to couple to a first sensor, and a second input configured to couple to a second sensor. Measurement circuitry is configured to couple to the first and second sensors and provide an output related to a sensed process variable. A multiplexer is configured to selectively couple the first and second sensors to the measurement circuitry. An equalizer circuit is coupled to the first and second sensors and configured to equalize a voltage potential between the first sensor and the measurement circuitry.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: November 13, 2012
    Assignee: Rosemount Inc.
    Inventors: Andrew J. Bronczyk, Charles E. Goetzinger, Jason H. Rud, Clarence E. Holmstadt, Douglas W. Arntson
  • INDUSTRIAL PROCESS CONTROL TRANSMITTER WITH MULTIPLE SENSORS
    Publication number: 20110071794
    Abstract: An industrial process control transmitter includes a first input configured to couple to a first sensor, and a second input configured to couple to a second sensor. Measurement circuitry is configured to couple to the first and second sensors and provide an output related to a sensed process variable. A multiplexer is configured to selectively couple the first and second sensors to the measurement circuitry. An equalizer circuit is coupled to the first and second sensors and configured to equalize a voltage potential between the first sensor and the measurement circuitry.
    Type: Application
    Filed: May 25, 2010
    Publication date: March 24, 2011
    Inventors: Andrew J. Bronczyk, Charles E. Goetzinger, Jason H. Rud, Clarence E. Holmstadt, Douglas W. Arntson