| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361910200 | With resistor sensor | 30 |
| 20080198524 | ABSORPTION GAS ARRESTOR SYSTEM - The subject application relates to a gas arrestor system(s) and/or methodology that facilitate sensing and shutting down a gas-burning appliance via a circuit that can perform both functions. In particular, the system and method can detect specific gases and at specific concentration levels by way of a sensory-power circuit. The circuit performs vapor detection and provides power to various ignition-related portions of the appliance. When gas or gas vapors are detected in the ambient air of the circuit and satisfy a threshold for that particular type of vapor, the circuit is shorted which results in a power loss to at least the ignition-related portions of the appliance. As a result, undesirable ignition of such vapors is mitigated. | 08-21-2008 |
| 20090086395 | INPUT VOLTAGE CLAMP FOR A SINGLE-SUPPLY SYSTEM - A system, apparatus and a method are described that provide a voltage clamp for a single-supply system. In particular, a negative voltage clamp prevents a negative over-voltage in a system having only a positive independent voltage source. For example, certain analog-to-digital converters and other circuits allow input signals below the negative supply, or ground in single-supply systems, either by direct sampling or using input attenuation resistors. The negative clamp allows the circuit to provide accurate negative over-voltage protection and the absence of this claim would result in over-voltage protection in positive voltage directions only. | 04-02-2009 |
| 20090323241 | Input Protection Method with Variable Tripping Threshold and Low Parasitic Elements - Various embodiments of an input protection circuitry may be configured with a variable tripping threshold and low parasitic elements, which may prevent a signal from propagating into the protected equipment/device if the voltage of the input signal exceeds a certain limit. The input protection circuit may operate to protect a measurement instrument, which may be an oscilloscope, early in the signal path leading into to the instrument, to avoid exposing sensitive circuitry to damaging voltage levels, and without introducing significant parasitic elements that would degrade the performance of the instrument. The protection circuit may be configured to include clamping to provide protection during the circuit response delay time. The input protection threshold of the protection circuit may be adaptive to a selected voltage range on the instrument without trading-off instrument performance and features. | 12-31-2009 |
| 20100165530 | Reformed inductor, a surge protection device and a surge protector - A reformed inductor, a surge protection device, and a surge protector with the reformed inductor and the surge protection device are disclosed. The surge protector includes a main body, a power plug, at least a socket, and a power protection device; wherein the power protection device include a reformed inductor, a plurality of fuses, and a plurality of surge absorber. The design of the surge protector can be used to reduce surge and stabilize current by connecting with circuit of the power outlet. | 07-01-2010 |
| 20100254057 | OVERLOAD POWER CUT-OFF DEVICE AND METHOD THEREOF - An overload power cut-off device is provided in an electric auxiliary system for avoiding overload in the system. The device includes a current detecting unit, a voltage comparing unit, an alarm unit, and a power cut-off unit. The current detecting unit includes a sensor coupled to the loop of the system for detecting a loop current of the system so as to output a sensing signal corresponding to the loop current. The voltage comparing unit compares the voltage value of the sensing signal with a preset voltage value and a voltage value of a rated current for respectively outputting a first driving signal and a second driving signal. The alarm unit receives the first driving signal to generate an alarm signal. The power cut-off unit receives the second driving signal to output a power cut-off signal for cutting off the power supply loop of the electric auxiliary system. | 10-07-2010 |
| 20110032652 | MAGNETIC ENERGY RECOVERY SWITECH HAVING PROTECTIVE CIRCUIT - In order to protect Magnetic Energy Recovery Switch (MERS) against an overvoltage and an overcurrent a voltage detection unit is provided for detecting the capacitor voltage of the MERS and control means is provided to control so as to turn ON the switch of the discharge circuit connected in parallel with the capacitor to make the capacitor discharge the electric charge thereof when the output of the voltage detection unit exceeds a predetermined value. Moreover, a current detection unit is interposed between the AC power supply and the load for detecting the current flowing to the load, and the current limiting is carried out by making the duty ratio of the ON/OFF of the pulse of the gate control signals of the MERS switches smaller than 0.5, when the output of the current detection unit exceeds a predetermined value. | 02-10-2011 |
| 20110134577 | OVER-VOLTAGE PROTECTION - A device may include a switch and a circuit coupled to the switch. The switch may include a structure with a top portion and a bottom portion and a material included within the structure. The material is configured to expand within the structure when voltage is applied to the material. The switch may also include a conductive element located in a bottom portion of the structure and connected to the material, wherein the conductive element operates to electrically close the switch when the applied voltage exceeds a threshold. The circuit includes a resistor. The circuit is configured to reduce the voltage supplied to components of the device when the switch is closed. | 06-09-2011 |
| 20110267730 | OVERVOLTAGE PROTECTOR - An overvoltage protector having a housing and at least one overvoltage limiter arranged in the housing, especially a gas-filled surge arrester ( | 11-03-2011 |
| 20110292555 | MEASURING TRANSIENT ELECTRICAL ACTIVITY IN AIRCRAFT POWER DISTRIBUTION SYSTEMS - An electrical power distribution system for an aircraft comprises a power source electrically connected to an electrical load and at least one circuit interruption device for interrupting current in the power distribution system. A distinguishing device is connected to the system for distinguishing a transient electrical event in the system from a steady-state level of electrical activity in the system, wherein the transient electrical event induces a potential difference across all or part of the distinguishing device. The circuit interruption device is operable to interrupt current flowing through the power distribution system if the potential difference across the distinguishing device exceeds a threshold voltage. | 12-01-2011 |
| 20120092800 | CIRCUIT FOR DETECTING OVER-VOLTAGE AND OVER-CURRENT - A circuit adapted for detecting over-voltage and over-current includes a first voltage-dividing resistor having one terminal connected with a DC power circuit and the other terminal connected to ground through a second voltage-dividing resistor, a current-detecting resistor having one terminal connected with the DC power circuit and the other terminal designated as an output node, a voltage regulator having one terminal connected to the output node and the other terminal is connected to ground, and a comparator which has a non-inverting input connected at the joint of the voltage regulator and the output node, an inverting input connected at the joint of the voltage-dividing resistors, and an output connected with the DC power circuit for transmitting a control signal to control work states of the DC power circuit according to a voltage comparison result of the non-inverting input with the inverting input. | 04-19-2012 |
| 20120176715 | RESISTANCE DETERMINING SYSTEM FOR OVER VOLTAGE PROTECTION CIRCUIT - A resistance determining system for an over voltage protection (OVP) circuit, includes an external power source, a microcontroller, a digital rheostat and a display unit. The external power source supplies an external voltage to the OVP circuit. The microcontroller stores an over voltage value. The microcontroller is connected to the external power source and configured to detect the external voltage and compare the external voltage with the over voltage value. The digital rheostat is connected to the microcontroller and includes a first rheostat having two connection terminals respectively connected to two first connection ends of the OVP circuit. The microcontroller adjusts the first rheostat to be a first resistance value to activate the OVP circuit when the external voltage is substantially equal to the over voltage value. The display unit is connected to the microcontroller and configured to display the first resistance value. | 07-12-2012 |
| 20120281326 | EFFICIENT INPUT VOLTAGE SENSING TECHNIQUE - This document discusses, among other things, systems and methods for detecting a charging current from a startup circuit to a controller without power loss from a voltage divider, and for providing information representative of the charging current to the controller. | 11-08-2012 |
| 20130038973 | Over Voltage Protection Circuit and Electronic System for Handling Hot Plug - An over voltage protection circuit is disclosed. The over voltage protection circuit comprises an input end, coupled to an input power, for receiving an input voltage provided by the input power; and a driving module, coupled between the input end and a ground end, for generating a discharging current when the input voltage is larger than a predefined voltage, to reduce the input voltage to the predefined voltage. | 02-14-2013 |
| 20130135781 | ELECTRICAL SWITCHING APPARATUS WITH OVERVOLTAGE PROTECTION - An electrical switching apparatus includes a first terminal, a second terminal, a neutral conductor, separable contacts electrically connected between the terminals, an operating mechanism to open and close the contacts, a fused varistor electrically connected between the first terminal and the neutral conductor; and a trip mechanism including a trip coil cooperating with the operating mechanism to trip open the contacts. A second varistor is electrically connected in series with the trip coil between the first terminal and the neutral conductor. A thyristor is electrically connected in parallel with the second varistor. An overvoltage detection circuit is electrically interconnected with and causes the thyristor to energize the trip coil and cause the trip mechanism to trip open the contacts responsive to overvoltage between the first terminal and the neutral conductor. | 05-30-2013 |
| 20130170086 | OVERVOLTAGE PROTECTION CIRCUIT AND PORTABLE ELECTRONIC DEVICE COMPRISING SAME - An overvoltage protection circuit is configured to protect a battery pack from overvoltage when the battery pack is in charge. The overvoltage protection circuit includes a power supply, an overvoltage protection chip, a controller and switching circuit. The power supply is configured to charge the battery pack. The overvoltage protection chip is electronically connected between the power supply and the battery pack, the overvoltage protection chip comprising a voltage detection pin. The controller is electronically connected to the battery pack and configured to detect whether the battery pack is a high voltage type battery pack or a normal voltage type battery, and outputting corresponding control signals according to the detection. The switching circuit comprises a switch and two voltage dividing circuits, the switch connecting a corresponding voltage dividing circuit to the positive pole of the battery pack and the voltage detection pin under control of the control signal. | 07-04-2013 |
| 20130335873 | OVERVOLTAGE PROTECTION CIRCUIT AND METHOD THEREOF - The overvoltage protection circuit in accordance with the present invention includes a resistor divider, a reference voltage supply unit, a comparator, and an inverter, wherein the inverter consists of a series-parallel combination circuit of first to third semiconductor switching elements which are driven by receiving an output of the comparator and the first semiconductor switching element and the second semiconductor switching element or the third semiconductor switching element are driven by receiving the output of the comparator, output an external voltage when the external voltage is within the range of the voltage required for an internal circuit, and flow the external voltage to a ground and thus make the voltage supplied to the internal circuit 0(zero)V to protect the internal circuit from an external overvoltage when the external voltage is a voltage (overvoltage) higher than the required voltage for the internal circuit. | 12-19-2013 |
| 20140002940 | Open Neutral Protection | 01-02-2014 |
| 20140022683 | DEVICE FOR PROTECTING ELECTRIC EQUIPMENT FROM OVERVOLTAGE AND LIGHTENING - An electric equipment protection device includes a first conducting line and a second conducting line, connectable to a power source to receive a supply voltage of a rated value; at least one varistor, connected between the first conducting line and the second conducting line, and having a breakdown voltage; and a control stage cooperating with the varistor. The control stage includes at least one gas discharge device, an activation network of the gas discharge device and a diagnostic device. | 01-23-2014 |
| 20140247529 | Apparatus And Method for Water Protection Of An Electronic Device - An apparatus comprises a sensor having a sensing film and at least two electrodes; and a plurality of electronic components operably associated with the sensor. The sensing film is configured to provide a signal based on humidity immediately prior to contact with liquid water. The electronic components are configured to provide a change in output voltage to trigger an electronic switch that disconnects an electronic device from a power source. | 09-04-2014 |
| 20140285937 | CIRCUIT AND METHOD OF OVER-VOLTAGE PROTECTION - A circuit and method of over-voltage protection is provided to prevent the power supply to provide an exorbitant voltage to the electronic cigarette, the electronic cigarette case or the electronic cigarette charger; said circuit comprises a DC input terminal, a DC output terminal, a voltage sampling circuit, a switch control circuit and a switch circuit; the voltage sampling circuit is electrically connected with the DC input terminal and the switch control circuit respectively; the switch control circuit is electrically connected with the switch circuit; the switch circuit is electrically connected with the DC input terminal, the DC output terminal and the switch control circuit respectively. When implementing the present invention, an exorbitant voltage can be prevented to provide to the electronic cigarette, the electronic cigarette case or the electronic cigarette charger by the power supply, thus being protected from over-voltage as the exorbitant voltage may damage the products. | 09-25-2014 |
| 20140313626 | PROGRAMMABLE HIGH VOLTAGE ENERGY SAVING SYSTEM - A programmable system includes a first level protection circuit comprised of discharge tube CR | 10-23-2014 |
| 20150333499 | Systems and Methods to Protect an Energy Utility Meter from Overvoltage Events - A device may include a sensor. The sensor may detect usage of electric power. Additionally, the device may include a fusible surge resistor coupled in series with the sensor, and a thermal metal oxide varistor (MOV) coupled in parallel with the sensor. | 11-19-2015 |
| 20150364916 | SURGE PROTECTION DEVICE FOR MULTI-PROTECTION MODE COMMUNICATIONS - The present invention relates to a surge protection device for multi-protection mode communications, comprising: an input line into which a voltage is introduced; an output line connected to an external line; a surge discharge part provided with a ground terminal; a surge protection circuit part provided between the input line and the output line and having at least two or more surge protection circuits provided in parallel and discharging the introduced voltage to the ground terminal if the introduced voltage is a surge voltage; circuit conversion parts for selectively connecting the input line and the output line to any one of the surge protection circuits; a condition measuring part for measuring an input voltage introduced into an input terminal of the input line and a second discharge voltage from the surge protection circuit to the ground terminal and comparing each of the input voltage and the second discharge voltage with preset reference voltages; and a control circuit part for detecting abnormality of the connected surge protection circuit by using the comparison result of the input voltage and the comparison result of the second discharge voltage and converting the connected surge protection circuit into another one of the connected surge protection circuits through the circuit conversion parts if the abnormality of the connected surge protection circuit is detected. By the surge protection device for multi-protection mode communications, the damage to the surge protection circuits can be detected using the input surge voltage and no voltage is required to be additionally applied for detecting the damage to the surge protection circuits. | 12-17-2015 |
| 20150372472 | DISCONNECTION INDICATOR OF AN ACTIVE COMPONENT OF A DEVICE FOR PROTECTING AN ELECTRICAL INSTALLATION - A device for protecting an electrical installation including an insulating body electrically defining an internal housing, the protective device including, within the internal housing: an active component of a device for protecting an electrical installation; a disconnection system for disconnecting the active component moveable between a contact position corresponding to a connected state of the active component and an open position corresponding to a disconnected state of the active component; a disconnection indicator, where the disconnection indicator is secured in movement to the disconnection system and the disconnection indicator and the insulating body are arranged to have a first configuration, which corresponds to the contact position, and a second configuration, which corresponds to the open position, the relative positioning of the disconnection indicator with respect to the insulating body in the first configuration being visually distinct from the outside of the insulating body from the relative positioning of the disconnection indicator with respect to the insulating body in the second configuration. | 12-24-2015 |
| 20160006235 | ANTI-LIGHTNING STROKE OVERCURRENT PROTECTION SWITCH - An anti-lightning stroke overcurrent protection switch comprises an overcurrent protection switch with an overvoltage protection sensor disposed inside and operated by one of the conductive plates. The overvoltage protection sensor comprises a metal oxide varistor and an insulating thermosensitive piece, disposed at one side of the operating portion of the conductive plate; on the other side a spring is arranged, providing the elastic force to hold the position of the thermosensitive piece. When the metal oxide varistor rises up the temperature to a certain degree due to high voltages, the thermosensitive piece would melt instantly due to its large contact surface and rapid heat conduction, resulting the elastic force counterbalanced and assuring the switch to be turned off before reaching an exceeding high degree of temperature, further improving safety of the present invention. | 01-07-2016 |
| 20160049786 | GaN OVERVOLTAGE PROTECTION CIRCUIT - A gallium-nitride based power transistor is coupled to a voltage source that has transient overvoltage conditions exceeding the allowable withstanding voltage of the power transistor. An overvoltage protection circuit is coupled to the power transistor to temporarily turn on the power transistor during the overvoltage condition to protect the power transistor from overvoltage breakdown. | 02-18-2016 |
| 20160064918 | OUTPUT SHORT CIRCUIT PROTECTING DEVICE - An output short circuit protecting device electrically connected to a power supplying device includes a first output short circuit protecting unit. The first output short circuit protecting unit includes a sensing unit, a comparing unit, a judging element, and a latching unit. The sensing unit is electrically connected to a switching unit, a first outputting resistor, and a second outputting resistor of the power supplying device. The comparing unit is electrically connected to the sensing unit. The judging element is electrically connected to the comparing unit, and a controller and a signal-controlling terminal of the power supplying device. The latching unit is electrically connected to the judging element and the signal-controlling terminal. | 03-03-2016 |
| 20160126723 | PROTECTION CIRCUIT OF SEMICONDUCTOR DEVICE - A protection circuit of a semiconductor device includes a high electron mobility transistor and a protection element. Between the drain and the gate of the high electron mobility transistor, the protection element includes: a thyristor; and a first resistor connected in series to the thyristor. Between the source and the gate of the high electron mobility transistor, the protection element includes: a second resistor and an interrupter that is connected in series to the second resistor. The interrupter interrupts a flow of a current between the drain and the gate when the thyristor is turned off, and the interrupter permits the current to flow between the drain and the gate when the thyristor is turned on. | 05-05-2016 |
| 20160204599 | ARRANGEMENT FOR OVERLOAD PROTECTION FOR OVERVOLTAGE PROTECTION EQUIPMENT | 07-14-2016 |
| 20160380428 | VOLTAGE LIMITER - A voltage limiter includes first and second DC terminals connectable to a DC power transmission medium and ground, respectively. The voltage limiter further includes: (1) a current transmission path including two portions connected in series between the terminals and each including a non-linear resistive element; (2) a current bypass limb connected in parallel with the second portion and including at least one switching element; and (3) a control unit configured to control switching of the or each switching element to selectively switch the current bypass limb, during a fault condition, from a first mode to a second mode. In the first mode, current flows through the current bypass limb and bypasses the second current transmission path portion. In the second mode, current between the DC terminals is inhibited from flowing through the current bypass limb and thereby permits the current to flow through the second portion. | 12-29-2016 |
