| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 340664000 | Current | 32 |
| 20080309505 | Current-differential relay device - A relay device, installed at one end of a power line within a protected zone, includes a processor performing a transmitting process that transmits first sampling current data of the power line at the one end to another relay device installed at the other end, through a 2048-kbps transmission line, and a receiving process that receives second sampling current data of the power line at the other end from the another relay device through the transmission line; a calculator calculating a difference, used for detection of an occurrence of fault, between the first and the second sampling current data; and a human-machine interface capable of receiving and presenting information through a display unit. The processor transmits the first sampling current data in a transmission frame, and transmits, using an unused field not for the sampling current data in the transmission frame, display-related data output from the human-machine interface. | 12-18-2008 |
| 20090002183 | SURGE CURRENT ALARM CIRCUIT - An exemplary surge current alarm circuit includes a detecting circuit to detect a surge current and convert the surge current into a digital signal with a pulse width corresponding to a duration of an over value part of the surge current when the surge current is over a limitative current value; a processing circuit connected to the detecting circuit to receive the digital signal and generate an alarm signal when the pulse width of the digital signal is over a limitative time; and an alarm circuit connected to the processing circuit to give an alarm upon receiving the alarm signal from the processing circuit. | 01-01-2009 |
| 20090115620 | Current switch with automatic calibration - A current switch is automatically calibrated when a flow of electric current is initiated in a power cable. | 05-07-2009 |
| 20090128348 | Overload alarm device and method thereof - An overload alarm device is provided. The device is disposed in an electric auxiliary system for avoiding overload of the system. The device includes a current detection unit, a voltage comparison unit and an alarm unit. The current detection unit includes a non-contact sensor connected to the circuit of the system for sensing the current of the system so as to output a voltage signal corresponding to the current. The voltage comparison unit compares the value of the voltage signal with a preset value. As the value of the voltage signal exceeds the preset value, the voltage comparison unit drives the alarm unit to generate an alarm signal. | 05-21-2009 |
| 20100013649 | LOAD CONTROL DEVICE HAVING AUDIBLE FEEDBACK - A load control device for controlling the amount of power delivered from an AC power source to an electrical load comprises a non-visual, haptic sensory output structure for producing a variable human detectable output related to the amount of power being delivered to the load. Specifically, the load control device may comprise an audible sound generator for generating audible sounds having operational characteristics that are representative of the amount of power being delivered to the load. For example, the amplitude (or frequency) of the audible sounds may increase as the amount of power delivered to the load increases and may decrease as the amount of power delivered to the load decreases. The audible sound generator may generate a turn-on audible sound that increases in amplitude (or frequency) with respect to time when the load is turned on, and a turn-off audible sound that decreases in amplitude (or frequency) with respect to time when the load is turned off. | 01-21-2010 |
| 20100019915 | Industrial universal electrometer - An electrometer for use in measuring current is provided. The electrometer includes an enclosure capable of containing various components of the electrometer. A pre-amplifier is present and is one of the components of the electrometer. The pre-amplifier is contained by the enclosure. The pre-amplifier has a pre-amplifier enclosure that contains the pre-amplifier and provides radio frequency shielding and magnetic shielding to the pre-amplifier. | 01-28-2010 |
| 20100073178 | Novel circuit interrupting device with high voltage surge protection - The present invention provides a circuit interrupting device which comprises a leakage current detection and protection circuit containing a simulated leakage current generation circuit which is capable of automatically generating a simulated leakage current when the circuit interrupting device is properly wired and in a tripped state to automatically test the functions of the key components of the circuit interrupting device. The simulated leakage current generation circuit comprises a normally closed switch and a normally open switch. The leakage current detection and protection circuit further comprises a normal status indicator light and a power output indicator light to indicate whether the circuit interrupting device is working properly and/or reverse wired. The circuit interrupting device further comprises a reset switch, a pair of discharged metal pieces, and four pairs of circuit interrupting contacts. | 03-25-2010 |
| 20100176960 | Branch current monitor with an alarm - A power meter for monitoring current in a power cable annunciates an alarm if the current transgresses one or more alarm current limits. False alarms are avoided by delaying the activation of the alarm for a delay interval following determination that current is flowing in the monitored conductor. | 07-15-2010 |
| 20100188241 | Current detection and precaution alarm device - The present invention discloses a current detection and precaution alarm device consisting of a current sensing device, a current voltage converter, an alarm device, a selection adjusting button and an illumination device, and primarily used in a current loop of an electric power system for detecting a current signal of the current loop without changing any original power circuit of the electric power system or preparing an operating power supply. If the detected current quantity exceeds a default setting, sound and light alarm signals will be generated to remind users to reduce the power consumption and prevent a possible risk or a sudden power failure caused by a current overload, so as to improve the practical value and electric safety of a product. | 07-29-2010 |
| 20100214109 | Current Protection Apparatus and Method - A current protection apparatus ( | 08-26-2010 |
| 20110025519 | NON-INTRUSIVE UTILITY MONITORING - A method of outputting to a user an indication of the usage of a utility, the method comprising: obtaining data indicating, for each of a plurality of appliances, a respective current level of usage of the utility by that appliance; for each of a plurality of appliance categories, using the obtained data to calculate a respective current total level of usage of the utility by appliances belonging to that appliance category; and outputting an indication of the calculated current total level of usage of the utility for at least one of the plurality of appliance categories. | 02-03-2011 |
| 20110057808 | OVERCURRENT PROTECTION CIRCUIT - An overcurrent protection circuit connected between a voltage input and a voltage output of an electronic device to protect against excessive current is disclosed. The overcurrent protection circuit includes first to fifth resistors, a relay comprising a coil and a normally closed switch, a pnp transistor, and a break-over element. When a current between the voltage input and the voltage output is greater or equal to a rated current of the electronic device, the npn transistor is turned on, while the coil is powered on to control the switch to be opened, therefore the voltage output cannot output voltage, which can protect against excessive current damaging the electronic device. | 03-10-2011 |
| 20110181432 | EXTERNAL DEVICE HAVING LOW POWER DETECTION AND PROTECTION AND METHOD THEREOF - When an external device connects to a connecting port of a host, a current detection circuit of the external device detects if the current provided by the host is less than the working current needed by the external device. If the current provided by the host is insufficient to initialize and operate the external device, a controller of the external device then stop powering the main component of the external device so that the main component will not damage due to constantly start/stop and can be protected. Meanwhile, an indicator of the external device notifies the insufficiency of current provision by vibrating, beeping, or displaying an indicating signal. Illusion of failure of the external device may be effectively avoided. | 07-28-2011 |
| 20110221604 | EXTERNAL POWER SOURCE VOLTAGE DROP COMPENSATION FOR PORTABLE DEVICES - A portable electronic device has a connector with a first pin and a second pin, and a battery charging circuit having an input coupled to receive current through the second pin to charge a battery of the device. The portable device also has a controller to determine whether the connector is coupled to an external power source (EPS) having a power converter circuit that can provide the current. The controller on that basis drives the first pin to stimulate the power converter circuit to raise voltage on the second pin. Other embodiments are also described and claimed. | 09-15-2011 |
| 20110298626 | BATTERY SYSTEM AND MANAGEMENT METHOD - A system and method for monitoring the status of a system of battery strings is described. The system includes a current sensor for each of the battery strings, and a controller configured to compare the measured current with criteria to determine whether the battery is in a thermal runaway state. Prior to entering the thermal runaway state the battery current characteristics may indicate other less serious states. Warning messages are provided for selected events, and the battery string is disconnected from the remainder of the system when a thermal runaway state is encountered. The system may provide a local indication of status and may also interface with a communications network to provide for remote monitoring. | 12-08-2011 |
| 20110304471 | MULTI-FUNCTIONAL INFRARED THERMOMETER - A multi-functional infrared thermometer having an infrared sensor device, a sensing device and a light-emitting diode (LED) light source is provided, wherein the infrared sensor device and the sensing device are disposed in a shell and used for measuring a temperature and an electric field state of a subject to be tested respectively; a control module is disposed in the shell and includes a power source device and a control circuit board for electrically connecting the control module to the infrared sensor device, the sensing device, and the LED light source, so as to detect the temperature and the electric field state of the subject to be tested and display detection results on a display device, and to provide an illumination. | 12-15-2011 |
| 20120019392 | USB Charger - A USB charger comprises a power input, a microprocessor, a resistor network, and a USB port for charging electronic devices through the USB port. The USB charger defaults to provide 2000 mA when power is applied through the power input. When a device is detected at the USB port, it measures device current drain to determine if it is charging. If the device is charging, then it remains in the 2000 mA charging mode. If no current drain is detected, the power supply switches to 1000 mA. If the electronic device recognizes the proper charging network it will begin charging. When the microprocessor detects current drain, it leaves the charging network as is. If still no current drain is detected, the USB microprocessor will attempt the 500 mA charging current. If there is a current drain, it will leave the charging network as is. If no current drain is detected, then it indicates a fault and a LED flashes to indicate the fault. | 01-26-2012 |
| 20120025996 | SYSTEM, METHOD, AND APPARATUS FOR MANAGING WASTEWATER TREATMENT INSTALLATION - Apparatus for managing a residential wastewater treatment system includes an in situ control unit that monitors an individual system. The control unit provides local control and alarms, and also sends status reports and/or alarms to a remote monitoring center via a telemetry device. The remote monitoring center makes information concerning the individual system available through a website. | 02-02-2012 |
| 20120119918 | METHODS AND APPARATUS FOR OPERATING AN ELECTRONIC TRIP DEVICE - An electronic trip device is described that includes a test signal generator coupled to at least one of a line conductor and a neutral conductor and configured to create a test signal. The electronic trip device also includes a leakage current detection circuit configured to compare a current in the line conductor and a current in the neutral conductor, the leakage current detection circuit configured to output an error signal if the test signal is not detected. | 05-17-2012 |
| 20120139741 | OVER-CURRENT PROTECTION APPARATUS - An over-current protection apparatus includes a first connector connected to a power supply, a second connector connected to a motherboard. A non-inverting input terminal of a comparator receives a voltage from a power supply and compares the received voltage with a preset voltage, when the received voltage is greater than the preset voltage. The comparator outputs a high level signal to control a first electrical switch to be turned on and a second electrical switch to be turned off. A clock pin of a flip-flop receives a high level signal from the second electrical switch, and an output terminal of the flip-flop outputs a low level signal to a third electrical switch, to control the third electrical switch to be turned off. A control pin of a first connector is disconnected to a control pin of a second connector and the power supply does not provide voltages to a motherboard. | 06-07-2012 |
| 20120176248 | METHODS, SYSTEMS AND APPARATUS FOR DETECTING MATERIAL DEFECTS IN COMBUSTORS OF COMBUSTION TURBINE ENGINES - A method for detecting defects in a combustion duct in a combustion system of a turbine engine while the turbine engine operates, wherein the combustion duct comprises an inner surface, which, during operation, is exposed to the hot-gas flowpath, the method comprising the steps of: providing a first electrode that is electrically connected to the combustion duct; providing a second electrode that resides within the hot-gas flowpath; applying a voltage across the first electrode and the second electrode; and detecting current flowing between the first electrode and the second electrode. | 07-12-2012 |
| 20120280822 | POWER RECEPTACLE CURRENT DISPLAYING AND ALERT DEVICE FOR DETECTING CURRENT STATE OF POWER RECEPTACLE AND RECEPTACLE HAVING THE SAEM - A power receptacle current displaying and alert device comprises a panel; a current sensor being a C silicone steel sheet; a coil winding around the C silicone steel sheet for sensing the current of the power receptacle; a current detector being a Hall IC; the Hall IC being installed at a notch of the C silicone steel sheet so as to detect the current flow in the power wire of the power receptacle; the Hall IC detecting the current electromagnetically; the current detector including an integrated circuit; the integrated circuit can transfer the value about the current state of the power receptacle for displaying; and a display for displaying a current state from the integrated circuit; a sound alarm, a light alarm and a transmitter for alerting the statues of the current of the power receptacle to users. A power receptacle using the device is also provided. | 11-08-2012 |
| 20120286963 | MONITORING DEVICE FOR DE-ENERGIZED CATENARY SYSTEMS OR OVERHEAD LINES - A monitoring device for de-energized catenary systems having bearer cables, contact wires, droppers, grounding lines, overhead lines and cable systems, during new construction or servicing work, to counter theft, is easy to implement, can be installed quickly and enables monitoring of predetermined track sections. Catenaries or overhead lines or cable systems are divided into segments, each consisting of two parallel strands, by forming a line resistance at one end by short-circuiting the strands of each segment, by connection each of the free ends of the segments with a respective measuring resistor of a predetermined size and a respective voltages source to form a respective closed circuit, and by each circuit being connected to a measuring unit for measuring loop current. The measuring unit is equipped with a monitoring device for triggering an alarm device when a predetermined limit value is exceeded or the loop current is interrupted. | 11-15-2012 |
| 20120306657 | ISOLATED RESISTIVE CURRENT SENSOR - An isolated current-sensing system for use with a resistive current sense element includes an analog front-end configured to receive a voltage from the resistive current sense element, and to provide an analog output. A processing circuit receives the analog output, and provides a measurement signal indicative of the sensed current. An isolation circuit provides an isolation barrier, and is configured to pass the measurement signal. A programmable over-current protection alarm may be included, and configured to generate an alarm signal when the analog output exceeds a programmable threshold. The processing circuit may include a voltage-to-PWM converter. | 12-06-2012 |
| 20120313789 | INFORMATION PROCESSING APPARATUS AND METHOD, SERVER APPARATUS, SERVER APPARATUS CONTROL METHOD, AND PROGRAM - There is provided an information processing apparatus including a current waveform acquisition unit which acquires a current waveform from when a predetermined electric appliance is used, a communication unit which transmits the acquired current waveform of the electric appliance to a server apparatus, and receives control information on a character corresponding to the electric appliance from the server apparatus, and a display control unit which performs control of causing a predetermined display unit to display the character based on the received control information on the character. | 12-13-2012 |
| 20130057410 | SOLAR BATIERY CHARGING CONTROLLER - Battery charging circuitry is provided. A charge controller receives electrical energy from a photovoltaic panel. A first timer provides a stream of clock pulses. A second timer is triggered by the clock pulses and generates a pulse-width modulated (PWM) signal. A duty cycle of the PWM signal is determined by way of comparing a time-varying capacitor voltage to a signal derived from a storage battery voltage. Transfer of electrical energy from the photovoltaic panel to the storage battery is regulated by a shunting element using the PWM signal. | 03-07-2013 |
| 20130076521 | CONNECTOR CAPABLE OF SHOWING CHARGING STATUS - The present invention is a novel connector capable of showing charging status without turning on the device under charge. The connector contains a casing, a connection element, and a status indication member. The connection element is configured at a lateral side of the casing for connecting a device to be charged. The status indication member contains a current measurement unit, a first indication element, and a second indication element. The current measurement unit is electrically connected to the connection element and a cable. The first and second indication elements are electrically connected to the current measurement unit and exposed out of a front side of the casing. By the indication elements' lighting pattern, the user can determine how much full the device under charge is. | 03-28-2013 |
| 20130162437 | ELECTRONIC DEVICE AND METHOD FOR DETECTING CURRENT LEAKAGE OF ELECTRONIC COMPONENTS IN THE ELECTRONIC DEVICE - A method for detecting current leakage of electronic components in an electronic device determines a target electronic component that needs to be analyzed for current leakage in response to a user selection. The target electronic component is controlled to enter into a power-off state, and a first current value of the electronic device is acquired from a digital power supply. The target electronic component is activated into a working state, and then is controlled to enter into a sleep state. A second current value of the electronic device is acquired from the digital power supply. It is determined that the current leakage is occurring in the target electronic component, if a first difference between the second current value and the first current value is more than a predetermined value. | 06-27-2013 |
| 20130194101 | SYSTEM AND METHOD FOR HEALTH MONITORING OF POWER CABLES - A shield of a power cable diverts leakage current to ground. During normal operation, the leakage current is steady. An increase in leakage current can lead to a failure mode of the power cable. Systems and methods are described to measure leakage current with a current transducer, which generates a current signal based on the leakage current, and to process the current signal to provide an output of the health of the power cable. | 08-01-2013 |
| 20130285825 | DEVICES FOR SENSING CURRENT - Devices for sensing current are described herein. One device includes a first magnetic sensor configured to determine a first magnetic field associated with a current conductor while the current conductor is conducting a current, a second magnetic sensor, a particular distance from the first magnetic sensor, configured to determine a second magnetic field associated with the current conductor while the current conductor is conducting the current, and a fastener configured to secure the current sensor to the current conductor such that the first and second magnetic sensors are on a plane substantially perpendicular to a longitudinal axis of the current conductor. | 10-31-2013 |
| 20140009299 | INDIRECT MEASUREMENT METHOD AND SYSTEM FOR MONITORING AND REPORTING LEAKAGE CURRENTS - A system and method are provided for monitoring and reporting leakage currents caused by a load that is coupled to an AC supply line. A sensor positioned adjacent to an AC supply line senses an amperage difference between currents traveling along the AC supply line. A processor coupled to the sensor compares the amperage difference to a threshold value. A reporting device coupled to the processor generates a report at least when the amperage difference exceeds the threshold value. | 01-09-2014 |
| 20160133112 | COMMUNICATION STATE DISPLAY METHOD AND COMMUNICATION STATE DISPLAY DEVICE - Provided is a communication state display method, the method being used to check a communication state of a communication device that transmits/receives signals to/from a different apparatus by serial communication, the method including: stretching a pulse width of a signal transmitted/received between the communication device and the different apparatus by serial communication; and causing current to flow through an indicator in response to the signal having the stretched pulse width to light the indicator during the current flow. | 05-12-2016 |
