Patents by Inventor Paul W. Cottrell

Paul W. Cottrell 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).

  • Power control circuit
    Patent number: 11393325
    Abstract: The circuit is of a loop-mountable unit of a fire alarm system, and includes: an adjustable current source, arranged to adjust the current from the loop through the power control circuit based on a control signal; an inverting amplifier, arranged to provide the control signal to the adjustable current source in which the control signal is based on the loop voltage; and a damper having an input for connection to a loop and an output connected to the inverting input of the inverting amplifier such that the voltage at the output of the damper is smoothed with respect to the voltage at its input.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: July 19, 2022
    Assignee: TYCO FIRE & SECURITY GMBH
    Inventors: Steven Ian Bennett, Paul W. Cottrell
  • Power Control Circuit
    Publication number: 20210048836
    Abstract: The circuit is of a loop-mountable unit of a fire alarm system, and includes: an adjustable current source, arranged to adjust the current from the loop through the power control circuit based on a control signal; an inverting amplifier, arranged to provide the control signal to the adjustable current source in which the control signal is based on the loop voltage; and a damper having an input for connection to a loop and an output connected to the inverting input of the inverting amplifier such that the voltage at the output of the damper is smoothed with respect to the voltage at its input.
    Type: Application
    Filed: March 15, 2019
    Publication date: February 18, 2021
    Inventors: Steven Ian Bennett, Paul W. Cottrell