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| Number | Title | Issue Date |
| 8174399 | Methods to detect hazardous conditions in a safety ground circuit in the presence of ground loop currents and electrical noise The invention comprises a set of methods to detect the resistance of a connection to safety ground and to detect the presence of voltage hazardous to people in systems where an unknown amount of current intermittently flows in the safety ground circuit. Samples of v... | 05/08/2012 |
| 8138936 | Method for testing personnel ESD grounding devices with function of near-fail alert and device for performing the same A method for testing personnel ESD grounding devices with a function of near-fail alert is disclosed. A near-fail range is set. When the measurement of the resistance for a wrist strap or a footwear is within the near-fail range; an alarm is actuated to alert the us... | 03/20/2012 |
| 8138937 | Grounding monitoring device and system for work The present invention provides a device to monitor whether a work station operator has properly worn a grounding mechanism, and a novel cascading means to chain multiple devices into a chain for sharing electricity and ground. The present invention could achieve the... | 03/20/2012 |
| 7821413 | Enhanced AC immunity in ground fault detection A method for reducing the occurrence of false ground fault detections in a central office terminal is provided. The method includes generating a no-fault signal when no ground current is detected, delaying generation of a fault signal when ground current is detected... | 10/26/2010 |
| 7557723 | System and method for evaluating ground-fault circuit interrupters A system for evaluating at least one tripping stimulus for a ground-fault circuit interrupter includes: a sensing circuit configured to measure a leakage current from a voltage line to ground, wherein the sensing circuit is capable of generating a leakage signal inc... | 07/07/2009 |
| 7443308 | Enhanced AC immunity in ground fault detection A method for reducing the occurrence of false ground fault detections in a central office terminal is provided. The method includes generating a no-fault signal when no ground current is detected, delaying generation of a fault signal when ground current is detected... | 10/28/2008 |
| 7417554 | Wireless system for one or more electrical switching apparatus A system displays information from and controls electrical switching apparatus, such as circuit breakers. The system includes a plurality of circuit breakers having separable contacts and a plurality of conditions, such as bus temperature and contact wear. A plurali... | 08/26/2008 |
| 7353967 | Container, in particular, inner pallet container A pallet container has a container wall having an outlet opening and a drainage fixture with a flange. The drainage fixture is connected to the outlet opening in the container wall and fastened by the flange to the container wall. A conductor element is provided to ... | 04/08/2008 |
| 7355522 | Aircraft beacon device on wind power installations A warning system for a wind power installation of a wind farm. In one embodiment, the warning system comprises a visibility measuring device. In one embodiment, the warning system comprises a controller configured to synchronize flashing lights on the wind power ins... | 04/08/2008 |
| 7349194 | Method and system for electrically connecting the human (and vertebrate) organism to earth so as to facilitate a current flow between the human biopotential and earth for the purpose of promoting health, well being, and performance The present invention specifies the fundamental method and system for providing an electrical connection between the human and earth ground for purposes of promoting health, well being, and performance. It is based on the premise that vertebrate organisms require el... | 03/25/2008 |
| 7348793 | Method and apparatus for detection and prevention of bulk CMOS latchup A method and apparatus are provided for detection and prevention of bulk complementary metal oxide semiconductor (CMOS) latchup. A separate power distribution is provided for coupling a positive voltage supply rail to the N well and a ground voltage supply rail to t... | 03/25/2008 |
| 7327275 | Bathing system controller having abnormal operational condition identification capabilities A controller suitable for identifying an abnormal operational condition in a bathing system is provided. The controller includes a memory unit adapted for storing measurements indicative of electrical currents drawn by the bathing system under normal operating condi... | 02/05/2008 |
| 7274357 | Touch pad module including separate touch pad and control circuit units A touch pad module includes a touch pad unit for generating contact signals in response to operation thereof, a control circuit unit separate from the touch pad unit, and an electrical coupling unit having a first end coupled to the touch pad unit and a second end c... | 09/25/2007 |
| 7246640 | Fuel-discharge protection system for preventing electrostatic hazard A fuel-discharge protection system is provided herein to prevent electrostatic hazard when a tank truck is discharging fuel into a reservoir. This invention mainly contains an oil-valve switch device, a driving device, and an electrostatic detection and control devi... | 07/24/2007 |
| 7221283 | Circuit interrupter locator device A system for identifying a selected electrical circuit of interest from a number of electrical circuits, by locating a circuit interrupter connected to interrupt the flow of electrical power from an electrical power supply to the selected circuit of interest. The sy... | 05/22/2007 |
| 7193837 | Plug and circuitry for grounding an element A plug includes an element that is electrically connected to a ground element in a receptacle in a set up configuration and an electrical connection that is attached to an element to be grounded whereby an element, person, or device, or the like, can be securely gro... | 03/20/2007 |
| 7181169 | Controlling apparatus and method of mobile communication terminal using electrostatic detection A controlling apparatus of a mobile communication terminal using electrostatic detection includes an electrostatic detector for sensing an instantaneous voltage generated at higher than a reference level and applying it to a controller in order to recognize occurren... | 02/20/2007 |
| 7161788 | Low voltage modular room ionization system An ionization system for a predefined area includes a plurality of emitter modules spaced around the area, a system controller for individually addressing and monitoring the emitter modules and communication lines for electrically connecting the plurality of emitter... | 01/09/2007 |
| 7118380 | Connector arrangement in wrist strap monitors A connector assembly for a wriststrap jack is provided wherein the jack may be easily replaced in accordance with the invention. ... | 10/10/2006 |
| 7116239 | Current sense components failure detection in a multi-phase power system An evaluator (210) having an input (207) for receiving a signal indicative of a channel current sensed via a sensor in a mutlichannel current sharing system, and circuitry (313, 319) coupled to the input (207) and responsive to the signal... | 10/03/2006 |
| 7102356 | Electrical leakage detection circuit A method is provided for detecting electrical leakage between a power supply and a frame of a vehicle or machine. The disclosed method includes coupling a first capacitor between a frame and a first terminal of a power supply for a predetermined period of time. The ... | 09/05/2006 |
| 7091871 | Electrical hazard detection system An electrical hazard detection system is used to detect energized ground terminals on electric receptacles. This condition may not be detectable by traditional circuit testers when hot and neutral wires have been switched and ground terminals have been electrically ... | 08/15/2006 |
| 7090531 | Plug-connection verification for detecting a properly made electrical plug connection A plug-connection verification system for detecting a properly made electrical plug connection. A detection device is provided which includes an analyzer unit and a data transmission device, the analyzer unit being designed to detect the position of the locking elem... | 08/15/2006 |
| 7078621 | Grounding system for floating roofs in flammable storage tanks Lightning at or near the site of an oil storage tank can cause a charge build up in the tank. This charge must be discharged to ground at rapid speeds to prevent arcing, sparks and fire. The tank has a metal floating roof which can be used to discharge the charge to... | 07/18/2006 |
| 7049972 | Lightning strike hazard detector An accurate, fast-acting, wearable lightning strike hazard detector has a plurality of collecting plates for collection of arriving charged particles. The collecting plates are insulated from each other by an insulating mechanism. A connecting mechanism electrically... | 05/23/2006 |
| 7030769 | Monitor providing cause of trip indication and circuit breaker incorporating the same A circuit breaker with a thermal/magnetic trip device incorporates a monitor that senses the temperature of the bimetal and the amplitude of the load current to distinguish between a thermal and a magnetic trip. If the temperature of the bimetal is above a selected ... | 04/18/2006 |
| 7027957 | Current interrupter assembly A method for determining the influence of one of a plurality of cathodic protection circuits along a pipeline includes switching one of a plurality of cathodic protection circuits off, while the remainder of the plurality of cathodic protection circuits are left on,... | 04/11/2006 |
| 7023680 | Transient voltage protection and ground status monitoring apparatus and method In accordance with the present invention, a method is provided whereby the transient voltages presented at the input to a watt-hour meter are suppressed to prevent damage to the watt-hour meter and to the electronic devices that are powered through the watt-hour met... | 04/04/2006 |
| 7016173 | Device for detecting and protecting power connections and method thereof A device and method of detecting and protecting the power connections of a data processing system. The object of the invention is to determine the status of the power connections between each sub-system and the data processing system and protect the system when any ... | 03/21/2006 |
| 6975491 | Electrical ground protection device and method An apparatus and method for protecting against electrocution hazards that arise when an appliance is electrically connected to a miswired single-phase AC electrical source are described. Protection is provided against miswiring conditions that cause the putative gro... | 12/13/2005 |
| 6930612 | Device and method of monitoring grounding of personnel and equipment in ESD-sensitive areas A method and apparatus for monitoring grounding of personnel and equipment in electrostatic discharge (ESD) sensitive areas. The device generates a low voltage alternating current control signal (60) which is applied to personnel (50) and equipment ( | 08/16/2005 |
| 6924740 | Electrical resistance monitoring device A device for indicating whether a conductive element has an electrical resistance equal to or less than a predetermined value or whether the conductive element is reliably connected to earth reference potential by a resistance equal to or less than a predetermined v... | 08/02/2005 |
| 6853307 | High voltage proximity warning system and method A high-voltage-proximity warning system has a local panel (1) for being positioned in or about a cab (2) of heavy equipment or other vehicle (5), a remote panel (3) in predetermined electrical communication with the local panel and one or... | 02/08/2005 |
| 6822576 | Microprocessor controlled fault detector with circuit overload condition detection A fault indicator for monitoring an electrical conductor has a housing, an indicator flag or a light emitting diode (LED) that becomes visible from the exterior of the fault indicator upon the occurrence of a fault, and electronic circuitry for sensing a fault, for ... | 11/23/2004 |
| 6731217 | Electrical circuit tester An electrical circuit tester for allowing a user to efficiently test electrical fixtures and switches. The electrical circuit tester includes a housing that has a plurality of prongs that extend from the housing. The prongs are adapted for engaging an electrical out... | 05/04/2004 |
| 6696968 | Visualization luminous device adapted for electric motors of equipments supplied by the three-phase voltage The present invention is a visualization luminous device adapted for electric motors of equipments supplied by three-phase voltage, allowing a person to visualize with certainty whether there is presence of voltage downstream blades of a disconnecting swi... | 02/24/2004 |
| 6560079 | Ground loss detection for electrical appliances A low cost, low parts count electronic circuit that is built into an appliance automatically and continuously checks for an open ground condition or a condition where the power conductors are transposed, at which time, power is interrupted in the applianc... | 05/06/2003 |
| 6535113 | Electrical tell tale system for trailers An electrical tell tale system for trailers that consists of a unique tell tale monitor which is light weight which houses different colored light emitting diodes which define each individual trailer circuit. The tell tale monitor has an attached modular ... | 03/18/2003 |
| 6510987 | Automated monitoring of ESD (electro static discharge) of each of a plurality of operators in a production area A computer system is used for monitoring that each of a plurality of operators assigned to work during a predetermined work shift has checked into a production area and has measured the ESD (electro static discharge) from the body of the operator at an ES... | 01/28/2003 |
| 6501385 | Ground buzzer A safety mechanism for alerting power line workers of the failure to properly connect a grounding wire to a neutral wire. The grounding buzzer automatically provides an audible and/or visual output when disconnected from a storage location and continues t... | 12/31/2002 |
