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9024620 Polarity detection circuit  
The polarity detection circuit includes a first diode with anode receiving a first phase of the AC power supply voltage and a second diode with anode receiving a second phase, opposite the first...
9024615 Non-contact voltage detector  
A non-contact voltage detection panel mount assembly is provided. The assembly includes a base to mount to an electrical enclosure, the base including of four voltage portals, a test point and a...
9006624 Resonant frequency detection for induction resonant inverter  
An induction heating system includes an induction heating coil operable to inductively heat a load with a magnetic field, a detector for detecting a current feedback signal corresponding to a...
8981713 Charging apparatus using pad type electrode contact point  
Disclosed herein is a charging apparatus using a pad type electrode contact point, the charging apparatus including: a charging plate having a plate shape; and an attaching plate installed on a...
8963522 Current-direction detecting circuit and DC-DC converter  
According to one embodiment, a circuit includes an amplifier, first and second capacitors, a switch and a monitoring-comparator. The amplifier amplifies source and drain voltages to output first...
8713769 Embedded capacitive stack  
A novel method for manufacturing embedded a capacitive stack and a novel capacitive stack apparatus are provided having a capacitive core that serves as a structural substrate on which alternating...
8698486 Methods and systems for use in checking the polarity of multi-coil servos  
A method and system for configuring a valve in a turbine. The method includes transmitting a first signal from a servo to a first coil of an actuator to cause the valve to move to a first...
8405513 Connection confirmation system and main body device  
An electrical connection confirmation system includes a cartridge type HDD 200 and a storage device main body 100 into which the cartridge type HDD 200 is inserted. The cartridge type HDD 200...
8368385 Methods and systems to detect voltage changes within integrated circuits  
Methods and systems to detect droop events on-chip, which may include a sensor circuit located adjacent to a voltage node to convert a corresponding voltage to a digital count or value indicative...
8344737 Relay circuit tester device  
A circuit tester device for testing continuity and polarity of vehicle relay circuits may include a housing and a plug carried by the housing. The circuit tester device may also have a battery...
8319628 Three-phase faulted circuit indicator  
A three-phase faulted circuit indicator adjustable to accommodate a variety of three-phase power cables is disclosed. In one embodiment, faulted circuit indicator comprises a flexible holder that...
8248058 Signal testing apparatus for load control system  
A system for testing power line carrier signal integrity or strength in a building electrical system includes a transmitter module electrically coupled to a first electrical outlet and configured...
8072189 Charge and discharge control circuit and battery device  
Provided are a charge and discharge control circuit capable of reducing a circuit size, and a battery device. In a charger reverse connection detection circuit (116), a comparison circuit or the...
8004377 Indicator for a fault interrupter and load break switch  
A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the...
7956763 Faulted circuit indicator device having an improved clamping mechanism  
A faulted circuit indicator device for mounting on an overhead conductor cable for electrical power distribution systems to detect an abnormally high electric current therein includes a housing...
7906956 Polarity tester for an electronic communication port  
A polarity tester is engagable with an electronic communication port to test the polarity thereof. A connector is supported on a housing and features a plurality of electrical contacts for...
7893686 Power cord voltage indicator  
A voltage indicator for mounting on a power cord (FIG. 3) for indicating the presence or absence of a single-phase AC voltage potential on a monitored power cord for a grounded AC power...
7872464 Hand held arc fault testing system  
A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault...
7750621 Clamp meter for measuring consumption of current and power of electrical product  
A clamp meter is provided for measuring consumption of current and power of an electrical appliance. The clamp meter includes a power inlet port and a power outlet port that are in controlled...
7733080 Revolvable clamp meter  
The clamp meter contains a revolving member configured between the meter's body member and jaw member. The revolving member is composed of a first base and a second base located on the interfacing...
7570045 Attachment device and method for fastening electrical cable monitoring instruments to electrical cables  
The present invention is an attachment device and a method for fastening and removing an electrical cable monitoring instrument to an electrical cable. The attachment device comprises monitoring...
7486081 Apparatus and method for monitoring and controlling detection of stray voltage anomalies  
A mobile apparatus for monitoring an electric field in a patrolled area, comprising at least one detection device for measuring electric field signals, at least one camera device for collecting...
7482799 High-voltage detecting circuit for saving power in standby mode  
A high-voltage detecting circuit for saving power in a standby mode is provided. The high-voltage detecting circuit includes a high-voltage detecting module, a switch module and a control module....
7471075 Multi-test Arc fault circuit interrupter tester  
A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault...
7459901 Voltage presence indication device and electrical apparatus comprising such an indicator  
The voltage presence indication device comprises a collector electrode (2) designed to have at least one capacitive connection (5) with an electrical ground (6) or a capacitive connection (3) with...
7449875 Device for automatic detection of battery polarity  
The present invention provides a device for automatic detection of battery polarity, wherein a detector circuit is structured from detector terminals, detector units, positive voltage electrical...
7446549 Semiconductor leakage current detector and leakage current measurement method, semiconductor leakage current detector with voltage trimming function and reference voltage trimming method, and semiconductor integrated circuit thereof  
A semiconductor leakage current detector of the present invention includes a first analog switch which causes a current to be measured to flow or to be cut off, a second analog switch which causes...
7402992 Circuit component tester  
A circuit component tester includes a portable casing and a circuit provided within the casing. A plurality of leads are provided to electrically connect the circuit to a gate and two terminals of...
7382272 System, a tool and method for communicating with a faulted circuit indicator using a remote display  
Provided is a system, a tool and a method for communicating with a faulted circuit indicator (FCI), the faulted circuit indicator including a detection circuit for monitoring an electrical...
7342393 Multimeter with filtered measurement mode  
A multimeter with a filtered measurement mode. By pressing a single button or key, a low-pass filter is switched into the signal path to filter voltage spikes, noise, and switching transients from...
7315169 Microprocessor controlled fault indicator having inrush restraint circuit  
A fault indicator for indicating the occurrence of a fault in an electrical conductor has a housing, a high capacity battery, at least one light emitting diode (LED) visible from the exterior of...
7310049 Status indicator  
A status indicator indicates an operating state, including an electrical malfunction, of an electrical load that is located and controlled from locations remote from a monitoring location.
7307413 Device using a detection circuit to determine whether an output current thereof is source-induced or load-induced, and method therefor  
A device which uses a detection circuit to determine whether an output current thereof is source-induced or load-induced, and the method therefor. The device which performs some type of operation...
7253604 Assembled capacitor polarity automatic inspecting method and system  
An assembled capacitor polarity automatic inspecting method and system is proposed, which is designed for use to perform an automatic inspecting procedure to check whether an array of polarized...
7248056 Three-phase electrical receptacle tester  
A three phase receptacle tester including a housing, an electrical connection and a coupling assembly. The housing includes an outer surface, an opening and an inner cavity, wherein the opening...
7208932 Voltage detector  
A voltage detector used to determine if an exposed or unexposed wire or terminal is “hot.” The voltage detector includes a low density EMF field detecting circuit and a high density EMF field...
7199571 Probe apparatus for use in a separable connector, and systems including same  
A probe apparatus disclosed for use in a separable connector includes an insulating body and spaced apart first and second electrical conductors in contact with the insulating body. The first and...
7151462 Circuit arrangement and method for load diagnosis of a semiconductor switch  
The present invention relates to a circuit arrangement and a method for load diagnosis of a switch having a first and a second load connecting terminal. A first and a second current source...
7129693 Modular voltage sensor  
A voltage sensor is described that consists of a plurality of identical series-connected sections, where each section is comprised of an arrangement of impedance elements. The sensor is optimized...
7113102 System having a screen and an external power supply unit  
A system having a screen, in particular a flat screen, and having an external power supply unit that can be connected by a plug connector to the screen in order to supply the screen with a DC...
7106048 Fault indicator with auto-configuration for overhead or underground application  
A fault indicator for indicating the occurrence of a fault in an electrical conductor is automatically configured for an overhead application or for an underground application. The fault indicator...
7096155 Method, system and apparatus for providing real-time led status of embedded controllers to system management software  
Embedded controller(s) in an information handling system have real-time status and activities represented by indicators, such as light emitting diodes (LEDs), associated with the embedded...
7068038 240 volt outlet tester  
A 240 volt outlet tester is described. The 240 volt outlet tester includes a housing with three or four prongs extending outwardly from a base of the housing. The prongs are designed so that they...
7056072 Method and apparatus for controlling movement of cutting blade and workpiece  
A method of controlling a relative movement of a cutting blade and a workpiece which are moved relative to each other by a movement device in an operation with a machine tool. The method includes...
7034517 Multimeter with filtered measurement mode  
A multimeter with a filtered measurement mode. By pressing a single button or key, a low-pass filter is switched into the signal path to filter voltage spikes, noise, and switching transients from...
6977493 Electrical power probe for testing and supplying power to electrical wiring and devices  
An electrical power probe is provided. In one aspect, an electrical power probe includes a power probe control unit adapted to connect to a direct current (DC) power source and receive an input...
6963197 Targeted timed reset fault indicator  
A fault indicator for indicating the occurrence of a fault in an electrical conductor is reset at a predetermined time after the fault is detected, such as about 4 hours. The fault indicator has a...
6949921 Auto-calibration of multiple trip settings in a fault indicator  
A fault indicator for indicating the occurrence of a fault in an electrical conductor has a plurality of trip settings, such as in the range of 50 A to 1200 A, that is automatically calibrated....
6940416 Low voltage testing and illuminating device  
This invention relates to a limited range low voltage testing, regulating, and indicating device comprising a detector and low voltage measurer of magnitude in a switch-regulated power supply...
6888341 Dual voltage circuit tester  
A handheld dual voltage circuit tester, method and electronic circuit that quickly allows a technician to determine whether an automotive electrical system runs on a 12-14 volt circuit or 36-42...