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| Number | Title | Issue Date |
| 7852207 | Method for establishing power line communication link A method for providing power line communications in a multi-unit building is provided. One embodiment includes determining the quality of a communication link associated with each of a plurality of communication nodes, selecting one of the plurality of communication... | 12/14/2010 |
| 7796025 | Power line communication device and method A power line communication device configured to facilitate communications over a low voltage power line between a downstream user device and an external power line communication device is provided. In one embodiment, the device may include a communication module con... | 09/14/2010 |
| 7450001 | Power line communications system and method A power line communications system (PLCS) that provides communications to one or more user devices by repeating data packets on the power distribution network is provided. The PLCS may employ any or all of the MV power line conductors and/or the neutral conductor an... | 11/11/2008 |
| 7369045 | Monitoring system and device for an electric power line network A device is provided for monitoring an electric overhead line, which device is constituted by an independently operating real time multisensor for mounting in a position on a span of the overhead line. The device has a built-in transmitter for transmitting sensor si... | 05/06/2008 |
| 7352281 | Automotive gauge system using a power line carrier A data display system including a plurality of data sources; a data transmitter coupled to the data sources and to a transmission network comprising a power line; wherein the data transmitter comprises means for modulating the data as a frequency modulated carrier a... | 04/01/2008 |
| 7339458 | Power line communications interface and surge protector There is provided a system that includes an AC power input port for connection to an AC power line, an AC power output port for providing power from the AC power line, an AC power surge suppression circuit for limiting voltage at the AC power output port, a data por... | 03/04/2008 |
| 7336193 | Device for monitoring the leakage current of a surge arrester A device for monitoring a leakage current of a surge arrester has a measuring element for detecting a leakage current in a leakage current circuit. A filter assembly filters the leakage current in order to extract a third harmonic oscillation which is evaluated by a... | 02/26/2008 |
| 7323968 | Cross-phase adapter for powerline communications (PLC) network An adapter to reduce the effects of cross phase communication between a PLC transmitter plugged into one of the L1 or L2 power lines of a home and a PLC receiver plugged into the opposite L2 or L1 power line includes a housing with one si... | 01/29/2008 |
| 7315463 | Apparatus and method for multi-phase transformers A method and apparatus for multi-phase transformers are described. In one embodiment, a coupled inductor topology for the multi-phase transformers comprising N primary inductors. In one embodiment, each primary inductor is coupled to one of N input nodes and a commo... | 01/01/2008 |
| 7312694 | Capacitive couplers and methods for communicating data over an electrical power delivery system Capacitive couplers and methods for communicating data over an electrical power delivery system are disclosed. A device for coupling a signal onto a conductor of an electrical power delivery system includes a conductive member having a length of at least six inches ... | 12/25/2007 |
| 7307511 | Power line communication system and method The last portion of the electrical distribution system is used to provide high-speed communications to residential homes. An aggregation point interfaces a medium voltage power line with a point-of-presence, and a power line bridge enables flow of communications sig... | 12/11/2007 |
| 7265289 | Electronic module An electronic module (1) for connection of sensors or actuators to a bus line, with an electronic unit, with several jacks (3) for connection of electrical lines (4), and with one jack (5) and one plug (6) for connection of two bus... | 09/04/2007 |
| 7265664 | Power line communications system and method A power line communications system (PLCS) that provides communications to one or more user devices by repeating data packets on the power distribution network is provided. The PLCS may employ any or all of the MV power line conductors and/or the neutral conductor an... | 09/04/2007 |
| 7215245 | Activator circuit responsive to power line disturbances An activator circuit responsive to power line disturbances. In condition of false alarm, the user will toggle a local light switch causing electrical disturbances on the power line. The activator circuit detects these disturbances and activates an output, which is f... | 05/08/2007 |
| 7170405 | Method and apparatus for interfacing a power line carrier and an appliance A method and apparatus for communicating between an appliance and a power line carrier communication system includes at least one power line carrier connection, at least one appliance connection, and processing circuitry for translating between an appliance communic... | 01/30/2007 |
| 7167090 | Far-field RF power extraction circuits and systems A method and apparatus for performing far-field power extraction are presented. The method includes receiving an electromagnetic radiation signal, rectifying the signal to produce a direct current (D.C.) voltage and providing the D.C. voltage to a circuit. A far-fie... | 01/23/2007 |
| 7163158 | HVAC communication system A system for communicating across conventional HVAC wiring is provided. The system includes a communication device having a communication module capable of inducing low power, high frequency current signals into a single control wire coupling, for example, a thermos... | 01/16/2007 |
| 7164344 | Non-contact IC card reading/writing apparatus A non-contact IC card reading/writing apparatus having a superior reception characteristic includes a loop antenna, a resonant circuit unit, a wireless transmitting unit, and a wireless receiving unit. The resonant circuit unit, the wireless transmitting unit, and t... | 01/16/2007 |
| 7148799 | Arrangement of daisy chained inductive couplers for data communication There is provided an arrangement of inductive couplers. The arrangement includes a first inductive coupler on a conductor, and a second inductive coupler on the conductor. The first inductive coupler has a first winding for a data signal, and the second inductive co... | 12/12/2006 |
| 7079013 | Device for the inductive transmission of energy and/or data The device has a primary circuit (1) that transmits energy or data via an intermediate circuit (2) to a secondary circuit (3) by means of induction. The intermediate circuit (2) has a very low quality factor. The inductive coupling betwee... | 07/18/2006 |
| 7075418 | Multiband antenna system with tire pressure sensor A multiband antenna system includes a multiband antenna adapted to receive signals in a given frequency range, such as CB, and a trap to isolate signals in the tire pressure monitoring frequency ranges so that when it is mounted to the exterior of a vehicle in conve... | 07/11/2006 |
| 6873256 | Intelligent building alarm System and method for detecting, monitoring and evaluating hazardous situations in a structure includes the use of an expert system and, to the extent necessary, fuzzy logic in the generation of solution sets. Sensor units having two-way communication capability are... | 03/29/2005 |
| 4835516 | Arrangement for introducing audio-frequency signals into a power supply line An arrangement for introducing audio-frequency signals into a power supply line containing a compensating capacitor, through a junction converter having primary winding which is connected with an audio-frequency signal generator. The secondary winding of ... | 05/30/1989 |
| 4658238 | Method and apparatus for providing selectively variable modulation signal for a carrier wave A method and apparatus for transmitting intelligence over a carrier wave are provided in which a signal wave form is indirectly added to a carrier wave to produce a composite wave having a recognizable pattern of variations in intervals that are defined b... | 04/14/1987 |
| 4608552 | Process and device for the remote transmission of signals and application to the detection and/or measurement of the quanity of combustible gas in an atmosphere A process of remote transmission of signals issued by at least one sensor over a transmission line, wherein the power necessary to supply the sensor is transmitted by that line in the form of an alternating current signal of approximately constant intensi... | 08/26/1986 |
| 4422073 | Combustible gas detection system A combustible gas detection system in which analog signals produced by a remotely located combustible gas sensor are converted to digital signals at the sensor and the digital signals control a coherent frequency shift keying modulator which impresses alt... | 12/20/1983 |
| 4420752 | Real-time parameter sensor-transmitter A system for monitoring at least one parameter of either an energized electrical power line conductor or at least one parameter adjacent to the power line conductor, on a real-time basis and transmitting signals indicative of the parameter to a remote loc... | 12/13/1983 |
| 4396915 | Automatic meter reading and control system A remote automatic utility reading system includes a reading control center for transmitting commands to and receiving measurement data from remote terminal units via a command responsive control unit. The control unit is characterized by a computer havin... | 08/02/1983 |
| 4390863 | System for the transmission of binary signals between the components of an alarm system A system for transmission of binary signals between components of an alarm installation and across a transmission path, including an external wire network, comprises a converter for converting each of two logical conditions of two binary signals into resp... | 06/28/1983 |
| 4383243 | Powerline carrier control installation A powerline carrier control installation includes a control transmitter with an audio frequency output voltage, an isolation transformer, a coupling capacitor for parallel coupling to an a-c voltage network, and a device for suppressing a line frequency b... | 05/10/1983 |
| 4371867 | Transmitting signals over alternating current power networks To transmit signals over an alternating current power distribution network, the network load parameters are modulated by means of non-linear elements or by varying the characteristics of components by electrical action dependent on a reference signal. A r... | 02/01/1983 |
| 4268818 | Real-time parameter sensor-transmitter Apparatus for directly monitoring the conductor temperature or other parameters of an energized electric power line conductor, or of the medium adjacent the conductor, on a real time basis, and transmitting a signal indicative of that parameter to a remot... | 05/19/1981 |
| 4140999 | Transformer hot spot detection system The invention is a system for the detection of hot spots, i.e., localized over-heating, in electrical power transformers and the like which utilize one or more telemetric temperature devices that are embedded at preselected locations in the windings of th... | 02/20/1979 |
| 4031528 | Transmitting over power lines A transponder transmitter for transmitting over power lines includes a rectifier circuit that rectifies the power at power line frequency to provide a unipolar potential having ripple at twice the power line frequency. A circuit receives a drive signal fr... | 06/21/1977 |
| 4027286 | Multiplexed data monitoring system A multiplexed data monitoring system for use in monitoring the status of control valves or the like in subsea petroleum well control systems, utilizes an encoder circuit located externally of the control module and composed of passive electrical component... | 05/31/1977 |
| 4017845 | Circuitry for simultaneous transmission of signals and power A transmission line having a pair of wires enclosed in a shield is used to simultaneously transmit high frequency signals and low frequency power between distant locations. At the sending end of the line a high frequency source is connected between the fi... | 04/12/1977 |
| 4005399 | Impedance sensitive power line intrusion alarm system An alarm intrusion system using existing power lines. A sweeping oscillator controlled by a second oscillator having a lower frequency is connected to the power line through a transient clipper and a power line isolator. Connected to the sweeping oscillat... | 01/25/1977 |
| 4004291 | Electric signal transmitter, preferably for alarm system An electric signal transmitter preferably for alarm devices, the transmitter being connected with a manually actuatable switch which is galvanically separated from the signal transmitter and which upon actuation opens or closes respectively the current ci... | 01/18/1977 |
