Patents by Inventor Per Jespersen

Per Jespersen 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).

  • AC or DC power transmission system and a method of measuring a voltage
    Patent number: 9383390
    Abstract: The present invention relates to an AC or DC power transmission system. The system comprises a first electrical conductor, a second electrical conductor and an insulating space there between. The system further comprises an electric field measurement device comprising the following components being mounted in optical continuation: a first optical fiber being connected to a light source, a first optical lens, a circular polarization filter, a crystal rod having electro-optical properties, a linear polarization filter, a second optical lens, and a second optical fiber being connected to a light detection unit. The electric field measurement device is located adjacent the first electrical conductor and defines a first minimum distance between the crystal rod and the first electrical conductor and a second minimum distance between the crystal rod and the second electrical conductor. The second minimum distance is at least 10 times larger than the first minimum distance.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: July 5, 2016
    Assignee: POWERSENSE A/S
    Inventor: Per Jespersen
  • AC OR DC POWER TRANSMISSION SYSTEM AND A METHOD OF MEASURING A VOLTAGE
    Publication number: 20140049249
    Abstract: The present invention relates to an AC or DC power transmission system. The system comprises a first electrical conductor, a second electrical conductor and an insulating space there between. The system further comprises an electric field measurement device comprising the following components being mounted in optical continuation: a first optical fibre being connected to a light source, a first optical lens, a circular polarization filter, a crystal rod having electro-optical properties, a linear polarization filter, a second optical lens, and a second optical fibre being connected to a light detection unit. The electric field measurement device is located adjacent the first electrical conductor and defines a first minimum distance between the crystal rod and the first electrical conductor and a second minimum distance between the crystal rod and the second electrical conductor. The second minimum distance is at least 10 times larger than the first minimum distance.
    Type: Application
    Filed: January 17, 2012
    Publication date: February 20, 2014
    Applicant: Powersense A/S
    Inventor: Per Jespersen
  • Element of a moveable grate surface for incinerators
    Patent number: D317648
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: June 18, 1991
    Assignee: B & S Miljoteknik
    Inventors: Hans B. Andersen, Allan Sorensen, Per Jespersen