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| Number | Title | Issue Date |
| 8179656 | Surge protection circuit for passing DC and RF signals A surge protection circuit may include a tuned circuit board with traces designed to provide a surge protected and RF isolated DC path while propagating RF signals through the PCB dielectric with microstrip lines. The surge protection circuit utilizes high impedance... | 05/15/2012 |
| 8179655 | Surge protection apparatus and methods Improved over-voltage protection apparatus and associated methods useful in e.g., telecommunications applications. In one embodiment, the over voltage protection apparatus comprises a gas discharge tube, common mode inductor, coupled inductor, secondary over-voltage... | 05/15/2012 |
| 8174813 | Protection patch panel An access control system dissipates voltage transients while allowing access control equipment to operate normally. The access control system utilizes an isolation patch panel which is provided with circuitry to prevent voltage transients from damaging access contro... | 05/08/2012 |
| 8164877 | Coaxial in-line assembly A fine arrestor having a body with a bore there through, an inner conductor within the bore, an inner conductor capacitor within the bore coupled between a surge portion of the inner conductor and a protected portion of the inner conductor, and an inner conductor in... | 04/24/2012 |
| 8164878 | Power distribution unit A power distribution unit includes a communication unit. The communication unit includes a communication port and a protection circuit. The communication unit includes a ground pin and a plurality of signal pins. The ground pin is connected to a digital ground of th... | 04/24/2012 |
| 8134818 | Quarter wave stub surge suppressor with coupled pins A surge suppressor for protecting electronic equipment by suppressing damaging surges of low frequency signals in a radio frequency (RF) transmission line, while allowing RF signals of a desired frequency range to pass through the transmission line. The surge suppre... | 03/13/2012 |
| 8116058 | Signal distribution and surge detection and protection module and method The present invention contemplates systems and methods for distributing RF and DC signals and detecting, logging and suppressing surge energy associated with surge events such as lightning and power line surges. The detection and logging is provided in order to dete... | 02/14/2012 |
| 8116057 | Data port transient protection apparatus and methods Methods and apparatus for protecting data bus ports and their corresponding PHY devices from taking damage associated with excess voltage across one or more signal pairs during an intermittent connection. Such connections cause the signal pins to carry external devi... | 02/14/2012 |
| 8107209 | Protection circuit A method and an arrangement to detect and protect an electrical device against short-circuiting due to a presence of a conductive subject are provided. The arrangement may include a first and second probe, the first probe connecting to an electrical ground and the s... | 01/31/2012 |
| 8081413 | Intrinsically safe ethernet-based communication An intrinsically safe network switch (200) includes five electronically isolated ports, four for connections in hazardous areas (206-1, 206-2, 206-3, 206-4) and one for receiving an unsafe Ethernet input (204). The de... | 12/20/2011 |
| 8072728 | Overvoltage protection device An overvoltage protection device for protection of an electrical or electronic device, with a housing, with input and output terminals for electrical conductors, with line paths which each connect one input terminal to one output terminal, with first arresters which... | 12/06/2011 |
| 8035946 | Overvoltage protector circuit and a detector circuit for supervising such a protector circuit An overvoltage protector circuit for telecommunication equipments is disclosed. The protector circuit includes a gas discharge tube connected to a communication line for passing any harmful surge currents appearing in the line to ground. A degradation detector circu... | 10/11/2011 |
| 8027137 | Power filter Generally, a DC power filter and its associated components are presented herein. The DC power filter may operate in a telecommunications chassis between one or more electrical sources and one or more loads. A common mode noise shunt may be included to shunt noise fr... | 09/27/2011 |
| 8027136 | Surge suppression device having one or more rings A surge suppression device may include a housing having a cavity, a center conductor positioned within the cavity, a spiral inductor having an inner curve coupled to the center conductor and an outer curve, a coil capture device connected to the outer curve of the s... | 09/27/2011 |
| 8027138 | Capacitor sharing surge protection circuit A capacitor sharing surge protection circuit for protecting multiple ports from harmful energy surges, such as electrostatic discharge (ESD) and cable discharge events (CDE), is provided. The protection circuit includes a plurality of diodes with respective cathodes... | 09/27/2011 |
| 8014120 | Networked series of sensors having distributed measurement and control for use in a hazardous environment The invention is a networked system of devices positioned in a hazardous environment to monitor/control process conditions. The devices include sensors and controls such as valves. The sensors detect process conditions/control device settings and are monitored by a ... | 09/06/2011 |
| 7990675 | Monolithic solid state relay circuit for telecom wireline applications Methods and apparatus for utilizing a solid state relay arrangement as a part of a protection scheme for a telecom wireline card suitable are disclosed. According to one embodiment, a line card that is suitable for use in an optical network device includes an electr... | 08/02/2011 |
| 7978455 | Adaptive transient blocking unit A variable trip limit transient blocking unit (TBU) is provided. The variable trip limit transient blocking unit circuit includes a transient blocking unit and a low-pass filter, such as an RC circuit having an RC time constant. The RC circuit is disposed to approxi... | 07/12/2011 |
| 7952847 | Lightning protection device The present invention relates to a lightning protection device, comprises: a front cover member; a first insulation member; an electric conduction pin; a second insulation member; a connector, a through hole is longitudinally installed in the connector; a gas tube i... | 05/31/2011 |
| 7944670 | Surge protection circuit for passing DC and RF signals A surge protection circuit may include a tuned circuit board with traces designed to provide a surge protected and RF isolated DC path while propagating RF signals through the PCB dielectric with microstrip lines. The surge protection circuit utilizes high impedance... | 05/17/2011 |
| 7940508 | Inherently safe modular control system A modular system for transmitting power and data between a control processor that receives and transmits signals along a trunk of a distributed control network, and one or more field devices located in a hazardous area includes a backplane bus and a trunk module con... | 05/10/2011 |
| 7907381 | Protection circuit for a subscriber line interface circuit The present invention provides a protection circuit coupled to a tip lead and a ring lead in a subscriber line interface circuit formed on a silicon substrate. The protection circuit includes first and second diodes formed on the silicon substrate and coupled to the... | 03/15/2011 |
| 7898787 | Power panel with angled connectors A power distribution panel is disclosed. The power distribution panel includes a panel enclosure having a front face, a rear face, and an interior. The panel also includes a first plurality of connection blocks, each of the first plurality of connection blocks locat... | 03/01/2011 |
| 7898786 | Intrinsically safe galvanically isolated barrier device and method thereof A system and method for providing an intrinsically safe (IS) galvanically isolated barrier device. An IS barrier device provides IS galvanic isolation between a non-IS system and an IS system using a two-stage approach. In the first stage, a non-galvanically isolate... | 03/01/2011 |
| 7869179 | Protection patch panel An access control system dissipates voltage transients while allowing access control equipment to operate normally. The access control system utilizes an isolation patch panel which is provided with circuitry to prevent voltage transients from damaging access contro... | 01/11/2011 |
| 7859814 | Linear low capacitance overvoltage protection circuit using a blocking diode A low capacitance overvoltage protection circuit (80) provides protection to a communication line (12, 14). A diode bridge (46) is connected to the communication line (12, 14) so that overvoltages of both polarities pass through an overvo... | 12/28/2010 |
| 7855867 | PON transceiver with a surge protection circuit A passive optical network transceiver including a surge protection circuit so as to protect the electro-optical circuitry from lightning or other electrical surges. The surge protection circuit includes a ground line and at least one capacitor provided in a first li... | 12/21/2010 |
| 7839618 | AC/DC power line communication modem An AC/DC power device for AC/DC power line communication is provided. An AC/DC protection circuit coupled to an AC/DC power line is able to receive an AC or DC power. An AC/DC configuration circuit coupled to the AC/DC protection circuit is used to switch between an... | 11/23/2010 |
| 7826194 | Tunable lambda/4 filter subassembly The invention relates to a tunable λ/4-filter subassembly whose frequency response can be adjusted. For this purpose, the λ/4-filter subassembly has a signal-conducting electrical conductor and an electrically conductive element that is at a reference potential. F... | 11/02/2010 |
| 7821758 | Systems and methods for reducing intermodulation distortion Protection circuits for protecting equipment connected to a telecommunication wire pair is disclosed. A protection circuit in one embodiment utilizes a series arrangement of solid state protectors wherein at least some of the solid state protectors are biased. The p... | 10/26/2010 |
| 7813099 | Power line outlet strip and method for powerline communications A powerstrip apparatus having powerline networking capability. The apparatus has a housing member, which an outer region and an inner region. An AC power line is coupled to the housing member. In a specific embodiment, the AC powerline includes a male connector devi... | 10/12/2010 |
| 7804673 | Intelligent, self-aware powerline conditioning and communication node Powerline networks are inherently noisy and subject to power surges, spikes, and other events. Devices exist to combat these issues and protect electrical appliances that are connected downstream from the power sources for theses devices, but these devices usually a... | 09/28/2010 |
| 7778003 | Overvoltage protection module and an assembly of at least one telecommunications module and at least one overvoltage protection module An overvoltage protection module can be fitted to a telecommunications module having telecommunications contacts, to which telecommunications lines are connectable, and has at least two overvoltage protectors, at least one ground contact, and at least two pairs of p... | 08/17/2010 |
| 7768764 | Electrostatic discharge protection for microwave guided wave structure Electrostatic discharge protection for guided wave microwave structures is provided by a protection device that imposes minimal disruption on the microwave structures and negligible interference with the normal operation of the structures. The protection device prov... | 08/03/2010 |
| 7751169 | Signal distribution and surge detection and protection module and method The present invention contemplates systems and methods for distributing RF and DC signals and detecting, logging and suppressing surge energy associated with surge events such as lightning and power line surges. The detection and logging is provided in order to dete... | 07/06/2010 |
| 7746618 | Protection of a communication line A circuit for protecting electronic equipment intended to be connected to at least one first conductor of a communication line, including, between this first conductor and a second conductor of the line or the ground to which is connected the equipment to be protect... | 06/29/2010 |
| 7742271 | Apparatus and surge protecting circuit thereof A HomePlug apparatus is electrically connected to a power network and includes a HomePlug processing circuit and a surge protecting circuit. The HomePlug processing circuit is electrically connected to the surge protecting circuit. The surge protecting circuit has a... | 06/22/2010 |
| 7701689 | Protector block assembly for providing surge protection in telecommunication systems A protector block assembly interfaces a plurality of subscriber lines to communication equipment, such as digital subscriber line (DSL) modems. The assembly has a protector block into which surge protection modules are plugged. Each surge protection module limits th... | 04/20/2010 |
| 7684167 | Communication bus suitable for use in a hazardous area of a process plant A communication bus suitable for use in a hazardous area of a process plant includes a first transmission path adapted to communicate electrical signals in a first direction, and a second transmission path adapted to communicate electrical signals in a second direct... | 03/23/2010 |
| 7679878 | Capacitor sharing surge protection circuit A capacitor sharing surge protection circuit for protecting multiple ports from harmful energy surges, such as electrostatic discharge (ESD) and cable discharge events (CDE), is provided. The protection circuit includes a plurality of diodes with respective cathodes... | 03/16/2010 |
