Patents by Inventor Chathan M. Cooke

Chathan M. Cooke 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).

  • Publication number: 20210328462
    Abstract: A transformer system is provided that includes an ensemble of four magnetically coupled coils having fixed spacing geometry. The ensemble of four magnetically coupled coils includes a load coil, a primary resonant coil, a drive coil and a secondary resonant coil. All coils are coupled in the transformer system, but the first resonant coil is highly coupled with the drive coil so that the resonant coil can receive energy from the drive coil and the second resonant coil is highly coupled to the load coil so that the load coil can extract energy efficiently from the second resonant coil. Additionally, the primary resonant coil may be at least partially nested coaxially inside the drive coil and/or the secondary resonant coil may be at least partially nested coaxially inside the load coil.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 21, 2021
    Applicant: Massachusetts Institute of Technology
    Inventors: Chathan M. Cooke, Angel J. Carvajal
  • Publication number: 20210159734
    Abstract: A transformer system is provided that includes four magnetically coupled coils having fixed spacing geometry. The four magnetically coupled coils include a drive coil that produces magnetic fields and a load coil. All coils are coupled in the transformer system, but the first resonant coil is highly coupled with the drive coil so that the resonant coil can receive energy from the drive coil and the second resonant coil is highly coupled to the load coil so that the load coil can extract energy efficiently from the second resonant coil.
    Type: Application
    Filed: February 2, 2021
    Publication date: May 27, 2021
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Chathan M. Cooke, Angel J. Carvajal
  • Patent number: 10951064
    Abstract: A transformer system is provided that includes four magnetically coupled coils having fixed spacing geometry. The four magnetically coupled coils include a drive coil that produces magnetic fields and a load coil. A first resonant coil is magnetically coupled to the drive coil producing energy that is stored by the first resonant coil. A second resonant coil is magnetically coupled to the first resonant coil to propagate the energy stored in the first resonant coil to the second resonant coil without using a magnetic core. The second resonant coil is then magnetically coupled to the load coil where the energy is transferred to the load coil.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: March 16, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Chathan M. Cooke, Angel J. Carvajal
  • Publication number: 20190267843
    Abstract: A transformer system is provided that includes four magnetically coupled coils having fixed spacing geometry. The four magnetically coupled coils include a drive coil that produces magnetic fields and a load coil. A first resonant coil is magnetically coupled to the drive coil producing energy that is stored by the first resonant coil. A second resonant coil is magnetically coupled to the first resonant coil to propagate the energy stored in the first resonant coil to the second resonant coil without using a magnetic core. The second resonant coil is then magnetically coupled to the load coil where the energy is transferred to the load coil.
    Type: Application
    Filed: February 25, 2019
    Publication date: August 29, 2019
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Chathan M. Cooke, Angel J. Carvajal
  • Patent number: 7057393
    Abstract: A system is disclosed for monitoring the quality of an internal fluid contained in an apparatus. The system includes a pulse input port, a test gap unit, and a reactive impedance unit. The pulse input port receives a test pulse input signal from a pulse source. The test gap unit provides a test voltage across a test gap while the test gap unit is immersed in the internal fluid within the apparatus. The test gap unit has an inherent capacitance. The reactive impedance unit provides an impedance in series with the inherent capacitance of the test gap unit that restricts transfer of current to the test gap, and is coupled to the pulse input port and coupled to the test gap unit. The impedance unit includes a first resistor unit in parallel with a capacitor unit.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: June 6, 2006
    Assignee: Massachusetts Institute of Technology
    Inventors: Timothy L. Cargol, Chathan M. Cooke
  • Patent number: 6563296
    Abstract: The invention relates to sensors for detecting a time-varying current by employing a plurality of coils with separate windings, disposed on separate toroidal cores, that are placed in close proximity of each other so that each coil responds independently to the same current. The current produces a time-varying magnetic field which in turn induces a plurality of voltages across the coils that can be combined to provide a resultant signal. Some embodiments of the invention employ coils with opposite windings to obtain signals with opposite phases and combine these signals through differential detection means to obtain a combined signal. One aspect of the invention relates to production of a wide-band or a selectable band-width sensor by preparing at least one coil to be dissimilar with respect to the others. In addition, the invention provides provisions for easy calibration of the sensor.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: May 13, 2003
    Inventor: Chathan M. Cooke
  • Publication number: 20030067311
    Abstract: A system is disclosed for monitoring the quality of an internal fluid contained in an apparatus. The system includes a pulse input port, a test gap unit, and a reactive impedance unit. The pulse input port receives a test pulse input signal from a pulse source. The test gap unit provides a test voltage across a test gap while the test gap unit is immersed in the internal fluid within the apparatus. The test gap means has an inherent capacitance. The reactive impedance unit provides an impedance in series with the inherent capacitance of the test gap unit that restricts transfer of current to the test gap, and is coupled to the pulse input port and coupled to the test gap unit.
    Type: Application
    Filed: December 6, 2001
    Publication date: April 10, 2003
    Inventors: Timothy L. Cargol, Chathan M. Cooke
  • Publication number: 20020125877
    Abstract: The invention relates to sensors for detecting a time-varying current by employing a plurality of coils with separate windings, disposed on separate toroidal cores, that are placed in close proximity of each other so that each coil responds independently to the same current. The current produces a time-varying magnetic field which in turn induces a plurality of voltages across the coils that can be combined to provide a resultant signal. Some embodiments of the invention employ coils with opposite windings to obtain signals with opposite phases and combine these signals through differential detection means to obtain a combined signal. One aspect of the invention relates to production of a wide-band or a selectable band-width sensor by preparing at least one coil to be dissimilar with respect to the others. In addition, the invention provides provisions for easy calibration of the sensor.
    Type: Application
    Filed: May 21, 2002
    Publication date: September 12, 2002
    Applicant: Chathan M. Cooke
    Inventor: Chathan M. Cooke
  • Patent number: 6420879
    Abstract: A system is disclosed for monitoring electrical partial discharge signals in electrical power apparatus. The apparatus includes a housing and a plurality of openings in the housing through which electrical power may pass via electrical power contact units. The system includes a plurality of sensor units, each being in communication with, and associated with, an electrical power contact unit at each opening in the housing. The sensor units are for sensing partial discharge signals at each opening in the housing and for producing sensor output signals. The system also includes a control unit for simultaneously and synchronously receiving the sensor output signals over an interval of time, and produces simultaneous synchronous output signals. The system also includes a processing unit for processing the simultaneous synchronous output signals.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: July 16, 2002
    Assignee: Massachusetts Institute of Technology
    Inventor: Chathan M. Cooke
  • Patent number: 6392401
    Abstract: The invention relates to sensors for detecting a time-varying current by employing a plurality of coils with separate windings, disposed on separate toroidal cores, that are placed in close proximity of each other so that each coil responds independently to the same current. The current produces a time-varying magnetic field which in turn induces a plurality of voltages across the coils that can be combined to provide a resultant signal. Some embodiments of the invention employ coils with opposite windings to obtain signals with opposite phases and combine these signals through differential detection means to obtain a combined signal. One aspect of the invention relates to production of a wide-band or a selectable band-width sensor by preparing at least one coil to be dissimilar with respect to the others. In addition, the invention provides provisions for easy calibration of the sensor.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: May 21, 2002
    Inventor: Chathan M. Cooke
  • Publication number: 20020014890
    Abstract: A system is disclosed for monitoring electrical partial discharge signals in electrical power apparatus. The apparatus includes a housing and a plurality of openings in the housing through which electrical power may pass via electrical power contact units. The system includes a plurality of sensor units, each being in communication with, and associated with, an electrical power contact unit at each opening in the housing. The sensor units are for sensing partial discharge signals at each opening in the housing and for producing sensor output signals. The system also includes a control unit for simultaneously and synchronously receiving the sensor output signals over an interval of time, and produces simultaneous synchronous output signals. The system also includes a processing unit for processing the simultaneous synchronous output signals.
    Type: Application
    Filed: February 2, 1998
    Publication date: February 7, 2002
    Inventor: CHATHAN M. COOKE
  • Patent number: 4162227
    Abstract: Electrically insulating gaseous media of unexpectedly high dielectric strength comprised of mixtures of two or more dielectric gases are disclosed wherein the dielectric strength of at least one gas in each mixture increases at less than a linear rate with increasing pressure and the mixture gases are present in such proportions that the sum of their electrical discharge voltages at their respective partial pressures exceeds the electrical discharge voltage of each individual gas at the same temperature and pressure as that of the mixture.
    Type: Grant
    Filed: February 24, 1976
    Date of Patent: July 24, 1979
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Chathan M. Cooke