Patents by Inventor Timothy Gerald Lawrence

Timothy Gerald Lawrence 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).

  • Systems and methods for monitoring a rapping process
    Patent number: 8404020
    Abstract: A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system is described. The method includes determining model electrical characteristics of the rapper. The model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper. The method also includes storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper, determining actual electrical characteristics of the rapper, and comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine actual mechanical operating characteristics of the rapper.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: March 26, 2013
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Terry Lewis Farmer, Vivek Badami, Charles Erklin Seeley, David F. Johnston, Michael M. Mahler, Timothy Gerald Lawrence
  • SYSTEMS AND METHODS FOR MONITORING A RAPPING PROCESS
    Publication number: 20100057269
    Abstract: A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system is described. The method includes determining model electrical characteristics of the rapper. The model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper. The method also includes storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper, determining actual electrical characteristics of the rapper, and comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine actual mechanical operating characteristics of the rapper.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 4, 2010
    Inventors: Terry Lewis Farmer, Vivek Badami, Charles Erklin Seeley, David F. Johnston, Michael M. Mahler, Timothy Gerald Lawrence
  • Variable inductance current limiting reactor control system for electrostatic precipitator
    Patent number: 5705923
    Abstract: A method and apparatus for varying an electrically variable current limiting reactor (VICLR) ( 16) are provided in cooperation with an electrostatic precipitator automatic voltage control system. The inductance of VICLR (16) is varied by altering the DC current in control winding (66) of VICLR (16). A power source (10) connects serially to an inverse parallel SCR1 and SCR2, to VICLR (16), and to a TR set comprising a transformer (18) and rectifier (20) which supply power to precipitator (22). System electrical characteristics on both sides of the TR set are monitored. Computer (40) uses these monitored values to continuously calculate form factor and fractional conduction values. Step-down transformer (60) is connected to solid state relay (62) which is in turn connected to full wave bridge rectifier (64). Rectifier (64) is connected to control winding (66) of VICLR (16). Solid state relay (62) is also connected to computer (40).
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: January 6, 1998
    Assignee: BHA Group, Inc.
    Inventors: David F. Johnston, Michael McCall Mahler, Timothy Gerald Lawrence