Patents by Inventor David Scott MacLennan

David Scott MacLennan 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: 9576723
    Abstract: The present invention relates generally to systems and methods for isolating a current loop conductor of a current loop system of a pre-charge circuit from a plurality of current transformers disposed around the current loop conductor. In particular, the embodiments described herein include an insulating support flange having a first tubular section, a second tubular section radially disposed around the first tubular section and connected to the first tubular section via a solid annular section extending radially outward from the first tubular section to a first end of the second tubular section, an annular base extending radially outward from a second end of the second tubular section, and a plurality of prongs extending axially from or near to an outer circumference of the annular base, wherein each of the prongs comprises an end face that is angled toward the second tubular section. The insulating support flanges are configured to mate with each other along an axial direction of the current loop conductor.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: February 21, 2017
    Assignee: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: David Scott MacLennan, Mariana Wentzell
  • Publication number: 20150116066
    Abstract: The present invention relates generally to systems and methods for isolating a current loop conductor of a current loop system of a pre-charge circuit from a plurality of current transformers disposed around the current loop conductor. In particular, the embodiments described herein include an insulating support flange having a first tubular section, a second tubular section radially disposed around the first tubular section and connected to the first tubular section via a solid annular section extending radially outward from the first tubular section to a first end of the second tubular section, an annular base extending radially outward from a second end of the second tubular section, and a plurality of prongs extending axially from or near to an outer circumference of the annular base, wherein each of the prongs comprises an end face that is angled toward the second tubular section. The insulating support flanges are configured to mate with each other along an axial direction of the current loop conductor.
    Type: Application
    Filed: January 6, 2015
    Publication date: April 30, 2015
    Inventors: David Scott MacLennan, Mariana Wentzell
  • Patent number: 8952275
    Abstract: The present invention relates generally to systems and methods for isolating a current loop conductor of a current loop system of a pre-charge circuit from a plurality of current transformers disposed around the current loop conductor. In particular, the embodiments described herein include an insulating support flange having a first tubular section, a second tubular section radially disposed around the first tubular section and connected to the first tubular section via a solid annular section extending radially outward from the first tubular section to a first end of the second tubular section, an annular base extending radially outward from a second end of the second tubular section, and a plurality of prongs extending axially from or near to an outer circumference of the annular base, wherein each of the prongs comprises an end face that is angled toward the second tubular section. The insulating support flanges are configured to mate with each other along an axial direction of the current loop conductor.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 10, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: David Scott MacLennan, Mariana Wentzell
  • Publication number: 20120218070
    Abstract: The present invention relates generally to systems and methods for isolating a current loop conductor of a current loop system of a pre-charge circuit from a plurality of current transformers disposed around the current loop conductor. In particular, the embodiments described herein include an insulating support flange having a first tubular section, a second tubular section radially disposed around the first tubular section and connected to the first tubular section via a solid annular section extending radially outward from the first tubular section to a first end of the second tubular section, an annular base extending radially outward from a second end of the second tubular section, and a plurality of prongs extending axially from or near to an outer circumference of the annular base, wherein each of the prongs comprises an end face that is angled toward the second tubular section. The insulating support flanges are configured to mate with each other along an axial direction of the current loop conductor.
    Type: Application
    Filed: February 25, 2011
    Publication date: August 30, 2012
    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: David Scott MacLennan, Mariana Wentzell
  • Publication number: 20090084761
    Abstract: A control system for controlling and synchronizing a plurality of medium-voltage vacuum contactors comprises a two-level network structure. A dedicated network includes a plurality of servant control units operably coupled to the vacuum contactors and configured to ascertain a plurality of different data and conditions thereof. In addition, the dedicated network includes a master control unit in serial communication with the servant control units and configured to send and receive communications therewith. The master control unit is operably coupled to a control network including a plurality of various control devices. The master control unit is configured to send predetermined data received from the servant control units to the control network. The two-level network structure enables relatively jitter free communication on the dedicated network while not overwhelming the control network with unnecessary data.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventors: Angelo Bortolus, Reginald A. Drake, F. Michael Frayne, David Scott MacLennan