Company Filing History:
Years Active: 1976-1983
Title: Innovations of Dennis C. Jeffreys
Introduction
Dennis C. Jeffreys is a notable inventor based in Bedford, MA, who has made significant contributions to the field of communication technology. With a total of five patents to his name, Jeffreys has developed innovative methods that enhance communication over electric power lines and carrier waves.
Latest Patents
One of his latest patents is titled "Method and apparatus for communication over electric power lines." This invention discloses a method and apparatus for communicating over electric power lines in a direction from load to source. The power line voltage wave is loaded in a predetermined pattern to produce a corresponding pattern of signaling currents at a receiving site. Detection of the signaling current is accomplished by integrating the current in the phase or the neutral of the feeder that serves the signaling site during predetermined time windows synchronized with the power line voltage wave. The current integration is performed according to a detection algorithm to accumulate principally the current differences attributable to the signaling currents while in the presence of steady and transient currents on the feeder.
Another significant patent is "Method and apparatus for transmitting intelligence over a carrier wave." This invention describes a method and apparatus for transmitting intelligence over a carrier wave, where a signal waveform is added to a carrier wave to produce a composite wave with a recognizable pattern of variations in intervals defined by preselected locations in the composite wave. The variations in intervals are detected and converted into a signal that reflects the recognizable pattern of interval variations. In the preferred embodiment, the intelligence is transmitted over an electric power distribution network utilizing the alternating voltage therein as the carrier wave.
Career Highlights
Throughout his career, Jeffreys has worked with reputable companies, including New England Power Service Company and Mars, Incorporated. His experience in these organizations has contributed to his expertise in the field of communication technologies.
Collaborations
Jeffreys has collaborated with notable individuals such as Reed H. Johnston and Lawrence J. Stratton, further enhancing his innovative work in the industry.
Conclusion
Dennis C. Jeffreys is a distinguished inventor whose work in communication technology has led to significant advancements. His patents reflect a deep understanding of electric power lines and carrier wave communication, showcasing his innovative spirit and dedication to improving technology.