Quotables
"The idea that cavalry will be replaced by these iron coaches is absurd. It is little short of treasonous."
Aide-de-camp to Field Marshal Haig ; At a tank demonstration, 1916
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7315461 | Power supply device An object of this power supply device is to enable an overheat protection level and an overvoltage protection level to be set accurately. This power supply device includes a Schottky barrier diode (D52), which is placed as a temperature detection element at a... | 01/01/2008 |
| 7312612 | Circuit for detecting electric current A circuit for detecting an electric current by which a loss portion of a forward current caused by a backward leakage current of a diode generated by the influence of temperature increase can be compensated such that error in the peak value of a load current detecte... | 12/25/2007 |
| 7283055 | Electrified cover safeguard A warning device that turns on a warning light and or a warning sound to indicate when a manhole cover or a service box cover or a metal pole for lights, traffic lights, transformers or others has become dangerously electrically charged. The invention is attached to... | 10/16/2007 |
| 7271579 | AC signal level detection circuit An AC voltage generated by an AC power source 1 is rectified by a full-wave rectifying circuit 2, which generates a rectified voltage. An internal regulator 33 performs waveform shaping of the rectified voltage. A comparator 42 compares t... | 09/18/2007 |
| 7239125 | Method and apparatus for electronic meter testing An electronic energy meter senses input voltage and current signals and processes the input voltage and current signals to generate measurements of multiple types of power. The meter comprises a processing system for selecting one of the multiple types of power and ... | 07/03/2007 |
| 7174261 | Power line sensors and systems incorporating same An apparatus for sensing the current in a power line of a power system and systems incorporating the apparatus are disclosed. The apparatus may comprise an enclosure providing a window operable to permit the passage of the power line therethrough. The apparatus may ... | 02/06/2007 |
| 7016796 | Fast and accurate AC RMS and DC measurement A small microcontroller or a DSP may be used to process digital signals representative of a measurement. Furthermore, special RMS AC measurement or DC noise rejection algorithms may have to be run on the microcontroller or the DSP. Other implementations may use cust... | 03/21/2006 |
| 6961251 | Waveform independent high frequency power system Method and apparatus are disclosed for providing a constant voltage, high frequency sinusoidal output across a varying load, using either a single or multiple switch topology operating at constant frequency while maintaining high efficiency over the entire load rang... | 11/01/2005 |
| 6954061 | Method and apparatus for electronic meter testing An electronic energy meter senses input voltage and current signals and processes the input voltage and current signals to generate measurements of multiple types of power. The meter comprises a processing system for selecting one of the multiple types of power and ... | 10/11/2005 |
| 6937026 | High voltage interface module The present invention provides a voltage conditioning interface module to condition an electrical signal locally. This module receives the unsafe electrical signal at an input port. This input port is electrically coupled to an external sampling point on an electric... | 08/30/2005 |
| 6794881 | Arrangement for measuring the root mean square of a power frequency voltage across a large dynamic range, especially for measuring electrical output The root mean square of a power frequency voltage is measured across a large dynamic range, for example in order to measure electrical output, by converting the voltage to be measured into two or more partial voltage proportional thereto and measuring each partial v... | 09/21/2004 |
| 6771059 | Synchronous rectifier controller for power supply systems with high power switch and high efficiency The present invention discloses an AC-to-DC converter that includes a transformer having a primary side for inputting an input signal and a secondary side for outputting an output signal. The AC-to-DC converter further includes a synchronous rectifier controller con... | 08/03/2004 |
| 6548999 | RMS power sensor with 84 dB dynamic range A power meter includes components to measure RMS power over an 84 dB range or greater using the I-V square-law relation of a diode for measurements. The power meter includes multiple diodes along with a power distribution manifold which includes power div... | 04/15/2003 |
| 6541954 | Circuit apparatus for sensing line conditions in a three phase power line The present invention is a power monitoring circuit for sensing line conditions in a three phase power line. In the circuit a plurality of series connected power supplies for powering various components of the circuit are connected in series with a curren... | 04/01/2003 |
| 6456058 | Temperature stable integrated circuit full wave level detector incorporating a single operational amplifier stage design A temperature stable, integrated circuit full wave level detector incorporating a single stage operational amplifier design which does not require, as in prior art implementations, two operational amplifiers to perform a full wave rectification function o... | 09/24/2002 |
| 6407540 | Switched attenuator diode microwave power sensor The present invention relates to a switched attenuator diode microwave power sensor and more particularly to a true average, wide dynamic range microwave power sensor utilizing a switched step attenuator on the sensor input. The present invention provides... | 06/18/2002 |
| 6362616 | Flat response temperature gauge with a single diode An analog gauge includes a coil assembly and a permanent magnet fixedly attached to a rotatable shaft whereby magnetically orthogonal stator coils are disposed about the permanent magnet. The shaft is fixedly attached to a pointer arm that moves over a di... | 03/26/2002 |
| 6360086 | Device for generating an AC amplitude-dependent indicator A device for generating an indicator signal that corresponds to an AC signal amplitude is configured such that the DC current drawn by the device is substantially proportional to the AC signal amplitude. The device is particularly well suited for automati... | 03/19/2002 |
| 6331769 | RMS power sensor with 84 dB dynamic range A power meter includes components to measure RMS power over an 84 dB range or greater using the I-V square-law relation of a diode for measurements. The power meter includes multiple diodes along with a power distribution manifold which includes power div... | 12/18/2001 |
| 6291984 | Dual mode diode power sensor with square law and linear operating regions A dual mode power meter provides a first operation mode in the square law operating range of the diode, and a second mode in the square law region as well as the transition and linear operating ranges of the diode. The power meter includes multiple diodes... | 09/18/2001 |
| 6204727 | Precision controlled RF power detector circuit A controlled detector circuit for generating a detector current to the input of a selected circuit. An unwanted operational voltage is generated on the input of the selected circuit affecting the precision of the detector circuit. The controlled detector ... | 03/20/2001 |
| 6124714 | Lightning and surge arrester test apparatus and method A lightning arrester tester includes two tubular poles respectively carrying probe terminals, one probe terminal being connected in series through a high-voltage rectifier and high-resistance circuit disposed within the pole to one terminal of a DC microa... | 09/26/2000 |
| 6064193 | Method and apparatus for measuring the mean square value of an electrical signal A method and apparatus for measuring the RMS value of an electrical signal. An electrical signal is converted to a digital signal. The digital signal is squared and low pass filtered to extract the DC component, the DC component being recognized as the me... | 05/16/2000 |
| 6046631 | Detector coupled to transmission line by microstrip line The present invention provides a detector comprising a microstrip line having one end being grounded and another end connected to a main transmission line, a detection diode connected to the microstrip line, and a smoothing circuit for smoothing a signal ... | 04/04/2000 |
| 6037763 | Electricity measurement apparatus using hall effect sensor having rectified bias current An electricity meter includes a sensor supplied with a rectified A.C. supply signal, the sensor detecting the strength of magnetic field induced by current flow along a conductor and providing an output signal following a sine-squared relation with altern... | 03/14/2000 |
| 5959448 | Optically isolated line voltage sensing circuit A linear optocoupler is employed to provide a signal which is a galvanically isolated reproduction of the magnitude of an A.C. line voltage and another galvanically isolated signal indicative of a change in the polarity of the line voltage for enabling sa... | 09/28/1999 |
| 5952820 | Foreign voltage detector A foreign voltage detector is provided to detect and warn of the presence of potentially dangerous voltage levels on conductors such as power cables, metal utility boxes, metal building frames, and the like. The detector comprises a capacitive leaf sensor... | 09/14/1999 |
| 5933013 | Calibration circuit for calibrating frequency characteristics of an AC/DC converter A calibration circuit of an AC/DC converter which measures an AC voltage by converting the AC voltage to a DC voltage. The AC/DC converter measures the AC voltage with high accuracy with low cost by having a calibration circuit to correct the frequency re... | 08/03/1999 |
| 5828576 | Power monitor apparatus and method with object oriented structure An object oriented architecture is used within individual monitoring units. The monitoring devices include circuitry which receives an electrical signal and generates at least one digital signal representing the electrical signal. Objects within such indi... | 10/27/1998 |
| 5675245 | Power detector using a constant quiescent voltage divider A control circuit which regulates an ac power output device. The control circuit is operatively connected to the ac power output and measures the ac signal with a diode to generate a control signal stimulus. A second diode is operatively connected to the ... | 10/07/1997 |
| 5659243 | High isolation, power-on control circuit for aircraft external power connection A power-on control circuit which functions to inhibit and prevent turn-on of an external power supply to an aircraft, unless a continuity signal is received from the aircraft indicating proper mating of the external power plug in the aircraft socket, thus... | 08/19/1997 |
| 5650936 | Power monitor apparatus and method with object oriented structure An object oriented architecture is used within individual monitoring units. The monitoring devices include circuitry which receives an electrical signal and generates at least one digital signal representing the electrical signal. Objects within such indi... | 07/22/1997 |
| 5594333 | Zero current sensor A load measuring device includes a sensor for detecting power consumption surges by detecting a zero voltage point in the alternating voltage of an electrical apparatus, detecting the zero current point in the alternating current of the apparatus least re... | 01/14/1997 |
| 5541502 | Level measuring set for low-frequency signals A level measuring set for low-frequency signals with superimposed direct voltage includes a low-pass filter, a measuring rectifier, and a subtractor. A low-frequency measurement signal is supplied to the low-pass filter, which outputs a reference potentia... | 07/30/1996 |
| 5502374 | Current sensors A power measuring system includes a transformer that produces a voltage signal in response to the presence of a changing current within a power cable. An input circuit is electrically connected to the transformer for receiving the voltage signal, and prod... | 03/26/1996 |
| 5453682 | Wide-range thermistor meter A meter measures a voltage across a quasi-diode, the voltage caused by a current flowing through a resistance which changes substantially exponentially with changes in a medium being sensed. The meter comprises a logarithmic current measuring circuit coup... | 09/26/1995 |
| 5420505 | Direct current booster with test circuit A direct current booster device has a booster which includes a plurality of N-channel MOS field-effect transistors (FETs) each having a gate terminal and a drain terminal joined together and connected in series in the same direction from the input side to... | 05/30/1995 |
| 5418448 | Wide power range radiation monitor A wide power range radiation monitor includes a pair of diodes with their cathodes interconnected and with an additional capacitor coupled in parallel to one of the diodes. The detector, of the radiation monitor provides two outputs, a low power output an... | 05/23/1995 |
| 5381086 | Wide power range radiation monitor A wide power range radiation monitor includes a pair of diodes with their cathodes interconnected and with an additional capacitor coupled in parallel to one of the diodes. The detector of the radiation monitor provides two outputs, a low power output and... | 01/10/1995 |
| 5287057 | Superconducting circuit having a rectifier for converting a bipolar signal to a unipolar signal A superconducting circuit system comprises a biasing circuit for producing a bias current that changes periodically, and a superconducting rectifier circuit driven by the bias current. The superconducting rectifier circuit is supplied with a first pulse t... | 02/15/1994 |
