Patents Assigned to Butler Engineering LLC
  • Performance and isolation improvements for digitally controlled AC attenuation and protection circuits
    Patent number: 9178352
    Abstract: A protection and attenuation circuit for sensitive AC loads is described. The circuit provides AC power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an AC power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, PWM. The circuit monitors characteristics of the AC power signal driving a known load and characteristics of the load or other elements and determines the duty cycle of the pulse width modulated signal, PWM, based upon the duration and amplitude of the over-voltage, over-current, over-limit or other event.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: November 3, 2015
    Assignee: Butler Engineering LLC
    Inventor: Joel Butler
  • Performance and Isolation Improvements for Digitally Controlled AC Attenuation and Protection Circuits
    Publication number: 20150035363
    Abstract: A protection and attenuation circuit for sensitive AC loads is described. The circuit provides AC power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an AC power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, PWM. The circuit monitors characteristics of the AC power signal driving a known load and characteristics of the load or other elements and determines the duty cycle of the pulse width modulated signal, PWM, based upon the duration and amplitude of the over-voltage, over-current, over-limit or other event.
    Type: Application
    Filed: October 20, 2014
    Publication date: February 5, 2015
    Applicant: BUTLER ENGINEERING LLC
    Inventor: Joel Butler
  • Performance and isolation improvements for digitally controlled AC attenuation and protection circuits
    Patent number: 8873211
    Abstract: A protection and attenuation circuit for sensitive AC loads is described. The circuit provides AC power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an AC power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, PWM. The circuit monitors characteristics of the AC power signal driving a known load and characteristics of the load or other elements and determines the duty cycle of the pulse width modulated signal, PWM, based upon the duration and amplitude of the over-voltage, over-current, over-limit or other event.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: October 28, 2014
    Assignee: Butler Engineering LLC
    Inventor: Joel Butler