Massachusetts Institute of Technology

Koninklijke Philips Corporation N.v.

Talking Lights, LLC

Skulpt, Inc.

Al-Thaddeus Avestruz

Steven B Leeb

Elmer C Lupton

John Jacob Cooley

Roderick T Hinman

Gary Livshin

Zachary A Clifford

John Rodriguez

Nels R Peterson

Arijit Banerjee

George B Hovorka

Michael Rinehart

Seward B Rutkove

Shahriar Khushrushahi

Deron Jackson

Jose L Bohorquez

Arthur Hsu Chen Chang

Leslie K Norford

Mes Peterson

A system for generating an asymmetric magnetic field. The system includes a drive circuit and a stacked winding structure coupled to the drive circuit. The stacked winding structure includes a plurality of winding layers. The plurality of winding layers includes a first winding layer including a first conductive winding having first turns and a second winding layer including a second conductive winding having second turns ion. The plurality of winding layers is arranged to produce a first magnetic field at a first side of the stacked winding structure and a second magnetic field at a second side of the stacked winding structure when the drive circuit electrically drives the plurality of winding layers. The first magnetic field is greater than the second magnetic field.

Method and apparatus for producing an asymmetric magnetic field

Methods and apparatus for non-intrusive power monitoring and current measurement in a circuit breaker without modification of the breaker panel or the circuit breaker itself. In one example, an inductive pickup sensor senses current from the breaker face, an inductive link transmits power through a steel breaker panel door, and a passive balanced JFET modulator circuit modulates a carrier signal on the inductive link with information regarding the sensed current. A demodulated breaker current signal is available outside of the breaker panel door. The JFET modulator circuit does not require DC power to modulate the carrier signal with the information regarding the sensed current from the breaker. Such methods and apparatus may be interfaced with a spectral envelope load detection system that can monitor multiple loads from a central location.

Non-intrusive monitoring of power and other parameters

Embodiments of devices and methods for evaluating tissue are disclosed. In one embodiment, a method for measuring a characteristic of a tissue may include passing a current through the tissue, measuring a signal corresponding to the voltage resulting from passing the current through the tissue, analyzing current passed through the tissue and resulting voltage to determine the electrical characteristics of the tissue; and analyzing the electrical characteristics of the tissue to determine a status of the tissue.

Devices and methods for evaluating tissue

The present invention relates to the dual-use of radiation, for example, but not limited to, visible or infrared light, for both a conventional application, e.g., illumination, combined with the additional or 'dual-use' application of transmitting information without wires.

Multi-frequency dual-use system

A fluorescent lamp sensor system is provided. The fluorescent lamp sensor system includes a plurality of bulbs and a plurality of electrodes coupled to the bulbs. A balanced differential circuit measures changes in electric fields produced by the bulbs in front of the electrodes. The balanced differential circuit includes a symmetric current source associated with alternating the surface potential of the bulbs. A current mode detection circuit detects the current associated with the capacitive effects of the balanced differential circuit. A synchronous detection circuit isolates the capacitive effects of the symmetrical current source from stray signals that differ in either frequency or phase.

Flourescent lamp with integral proximity sensor for building energy management

A system for and method of generating electromagnetic radiation in which the radiation has both a first and second utility. The electromagnetic radiation is modulated to produce electronically detectable variations to achieve the second utility, the variations not affecting the first utility. In one embodiment, the electromagnetic radiation is visible light. In this embodiment, the first utility is illumination and the second utility is the transmission of data. In another embodiment, the invention provides a lamp for generating visible light capable of providing illumination and transmitting data to a receiver. Any variations in the visible light resulting from the data transmission are imperceptible by a human eye regardless of the nature of the data being transmitted. In yet another embodiment, a power line carrier modem or wireless network may be used with the present invention to transmit information to the source.

Communication with non-flickering illumination

Growing community of inventors

Waltham, MA, United States of America

Al-Thaddeus Avestruz