Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7737677 | Wide area protection control measurement system and method The present invention provides a wide area protection control measurement system and method which excels in economy, reliability and expandability, in which applied arithmetic operation functions for protection, control and measurement can be freely added and change... | 06/15/2010 |
| 7412338 | Radio frequency device within an energy sensor system An energy measurement system including a radio frequency (“RF”) device powered by a solar panel. The RF device comprising a wireless communication port operative to transmit and receive communication over a wireless network of additional RF devices. The energy m... | 08/12/2008 |
| 7412304 | Power system for area containing a set of power consumers There is provided a power system for an area containing a set of power consumers which can be applied to a collective housing consisting of a single or more buildings and can prevent power supply stop of a supply line having a higher priority. The system includes: m... | 08/12/2008 |
| 7323842 | Rotating electrical machine A rotating electrical machine has a housing with a shaft mounted rotatably in it. A rotor is fixed to the shaft and has a plurality of magnetic poles. A stator is positioned about the rotor and has a winding. A switch is mounted within the housing and has a first po... | 01/29/2008 |
| 7218223 | Magnetic field sensing for tamper identification The present technology involves a method and apparatus for detecting and reporting magnetic fields in the proximity of a utility meter as an approach to determining tampering of such meter. The sensitivity level of the magnetic field sensors may be adjustable allowi... | 05/15/2007 |
| 7180301 | Power monitor-glitch trap system A device for sensing and capturing the state of a direct current electrical power line comprising a voltage comparator having a pair of inputs, one of the inputs adapted to be connected to the power line, the other input connected to an analog and digital I/O module... | 02/20/2007 |
| 7167102 | System with replacement meter cover A system can be used with an existing meter that has a removable cover and a base and measures the usage of a utility commodity, such as electricity. The system replaces the removable cover with a replacement cover that fits onto the base in the same manner as the r... | 01/23/2007 |
| 7106045 | Apparatus for a simplified power disturbance indicator gage with learning capability options Disclosed is a simplified electrical power disturbance gage. The gage is capable of measuring high-speed anomalies on power mains. The gage includes elements capable of detecting power line anomalies that effect the operation of electrical devices connected to the p... | 09/12/2006 |
| 7075308 | Blocking impedance A power line distribution includes one or more impedance devices coupled to the neutral conductor of the power line distribution to segment the power line distribution for fault detection. ... | 07/11/2006 |
| 7068184 | Electric power meter including a temperature sensor and controller An electric power meter (102) includes a temperature sensor (114) and a controller (112). The controller (112) is operable, based on the temperature reported from the temperature sensor (114), to generate alarm(s) when the temperat... | 06/27/2006 |
| 7018725 | Magneto-resistance effect element magneto-resistance effect memory cell, MRAM, and method for performing information write to or read from the magneto-resistance effect memory cell A magneto-resistive effect element includes a first ferromagnetic film; a second ferromagnetic film; and a first nonmagnetic film interposed between the first ferromagnetic film and the second ferromagnetic film. The first ferromagnetic film has a magnetization more... | 03/28/2006 |
| 7015713 | Method and apparatus for evaluating a set of electronic components A method is disclosed of monitoring an environmental condition associated with a container with a set of electronic components including attaching a moisture recorder to the container, the moisture recorder comprising a sensing element responsive to atmospheric mois... | 03/21/2006 |
| 6759862 | Method and apparatus for evaluating a set of electronic components A method is disclosed of monitoring an environmental condition associated with a container with a set of electronic components including attaching a moisture recorder to the container, the moisture recorder comprising a sensing element responsive to atmospheric mois... | 07/06/2004 |
| 6384591 | Hands-free signal level meter An electrical signal measurement device comprises a system unit which is carried on the person of a technician by attachment to a belt, harness or the like and, in one embodiment, a headpiece incorporating a display, microphone and ear phone. The display,... | 05/07/2002 |
| 6360177 | Voltage scanning, measurement, storage and reporting device A portable unit, preferably adapted for plugging into a common wall outlet, has circuitry for monitoring the voltage and/or current provided through an electrical outlet. In addition to the monitoring circuitry, the unit preferably includes a microprocess... | 03/19/2002 |
| 6115676 | Methods and apparatus for performing load profile and load control An electronic energy meter register which, in one aspect, is configured to perform load profile recording in a manner which eliminates a need for a back-up battery is described. In other aspects, the present invention is a routine of operating a meter reg... | 09/05/2000 |
| 5973604 | Method for monitoring optical fiber cables for lightning damage Lightning strikes on or proximate to an optical fiber cable may be detected via a lightning detector (18) that monitors the characteristics of voltage present on a metallic sheath (12) associated with the cable. The lightning detector (18) detects excessi... | 10/26/1999 |
| 5899960 | Apparatus and method for power disturbance analysis and storage of power quality information A power monitoring system with associated signal processing and storage capabilities. Each leg of a three-phase power signal is simultaneously sampled on a plurality of channels to capture the instantaneous content of the power signal without time-skewing... | 05/04/1999 |
| 5845231 | Apparatus and method for power disturbance analysis and dynamic adaptation of impulse memory storage size A power monitoring system with associated signal processing and storage capabilities. An input signal is sampled and the samples are compared to a threshold to identify an impulse. The system analyzes the length of each impulse to dynamically adapt a memo... | 12/01/1998 |
| 5819203 | Apparatus and method for power disturbance analysis and storage A power monitoring system with associated signal processing and storage capabilities. Historical data for an electrical signal is retained and displayed by dividing the electrical signal in the time domain into segments herein referred to as events. A det... | 10/06/1998 |
| 5819204 | Apparatus and method for power disturbance analysis and selective disturbance storage deletion based on quality factor A power monitoring system with associated signal processing and storage capabilities. Disturbances on an electrical signal are evaluated based upon a quality factor and the disturbance and associated quality factor are stored. Disturbances with the lowest... | 10/06/1998 |
| 5801952 | Apparatus and method for power disturbance analysis and storage of unique impulses A power monitoring system with associated signal processing and storage capabilities. Impulses that are superimposed on an alternating-current electrical signal are identified and evaluated based upon amplitude, duration, and phase position. Impulses that... | 09/01/1998 |
| 5525898 | Programmable multi-channel load profile recorder and method of recording electrical energy metering quantities therein A programmable multi-channel load profile recorder includes a plurality of memory-based tables, such as a load profile configuration table, a plurality of channel and display configuration tables and an operations table, which can be updated when the reco... | 06/11/1996 |
| 5526287 | Portable data collection device The present invention provides a portable data collection device that has a variety of sensors that are interchangeable with a variety of input ports in the device. The various sensors include a data identification feature that provides information to the... | 06/11/1996 |
| 5451879 | Electromechanical relay monitoring system with status clocking An improved monitoring system which identifies the particular event (contact operation) and therefore the particular electromechanical relay (20, 22, and 24 which operated). This information is output from a MCU (30), along with the relative time the even... | 09/19/1995 |
| 5384713 | Apparatus and method for acquiring and detecting stale data Stale data is detected in a shift register containing time characters representing event occurrence times, expressed in timing data counts of a cyclic counter, by comparing the most significant bit of each stored time character with a value based on the m... | 01/24/1995 |
| 5301122 | Measuring and monitoring system A system for monitoring power usage of various devices at remote facilities is described. The system employs sensors at each facility to sense the on/off condition of the devices. A processor at each facility, under the control of a host computer at a cen... | 04/05/1994 |
| 5010335 | Optical port multiplexer for electric metering equipment A single optical port in an electric meter is multiplexed between at least two internal systems by using a multiplexer circuit which has a set of data lines which can be connected to the optical port and to one of the internal systems. The multiplexer is ... | 04/23/1991 |
| 4990893 | Method in alarm system, including recording of energy consumption A method for an alarm system is intended in particular for the monitoring of service apartments for elderly and/or handicapped persons. The energy consumption of each apartment is recorded over a period, for example in a computer. The results are presente... | 02/05/1991 |
| 4974167 | Erasable data acquisition and storage instrument A digital oscilloscope includes an acquisition system for digitizing an input signal to produce and store in memory a waveform data sequence representing the input signal. A display system within the instrument reads out and processes the data stored in t... | 11/27/1990 |
| 4783623 | Device for use with a utility meter for recording time of energy use A device for recording time of energy use for use with standard electric meters having a rotatable disc. The device includes a housing securable within a meter below the disc. A series of mounting holes are formed in the housing for mounting the device wi... | 11/08/1988 |
| 4758963 | Modular computing oscilloscope with high speed signal memory An oscilloscope to sequentially store, process and display an electrical input signal according to various signal events and characteristics. The oscilloscope is physically and functionally modular having both selectable hardware configurations from among... | 07/19/1988 |
| 4731575 | Prepayment metering system using encoded purchase cards A prepayment utility metering method and apparatus which uses encoded mag-stripe cards to transfer purchase information from the utility billing office to the customer's premises. The mag-stripe cards are read at the customer's premises by a microprocesso... | 03/15/1988 |
| 4728885 | Method and apparatus for duplicating electrical environmental conditions A monitoring system and apparatus is employed to duplicate unique environmental conditions at a first location so that sensitive electronic devices can be tested at a second location. Initially an environment recorder is plugged into the AC line at the fi... | 03/01/1988 |
| 4713609 | Battery backup installation for electric meter A battery backup installation for a time of use register for an electric meter is mounted within a case of the electric meter. The case includes a hatch which permits removal and replacement of the battery without requiring removal of the case from the me... | 12/15/1987 |
| 4634970 | Digital waveform processing oscilloscope with distributed data multiple plane display system A raster display digital oscilloscope includes an analog to digital converter and a memory array for developing and storing a digital measurement signal amplitude-dependent on an acquired input signal. After processing stored digital signals are conveyed ... | 01/06/1987 |
| 4630211 | Watt-hour meter display for informing consumer of energy consumption The circular array of 200 equally angularly spaced marks about the surface of the rotating calibration disk of a watt-hour meter is optically sensed to provide a series of meter pulses indicative of the rate at which power is being consumed. Each meter pu... | 12/16/1986 |
| 4622640 | Power load survey apparatus A power load survey apparatus is disclosed with an electronic power sensor for detecting a power load in the form of a pulse signal, a collector cartridge detachably coupled to the electronic power sensor and having a memory for storing the pulse signal a... | 11/11/1986 |
| 4556844 | Apparatus for mounting an electrical sensing device or encoder on a data output indicator or meter A pair of uniquely designed spring clips are snapped onto existing elements of a visual indicator such as the dial of a utility meter. An encoder having attachment elements with a spacing therebetween corresponding to the spacing between the clips is atta... | 12/03/1985 |
| 4553223 | Static disturbance signal recording system having detachable programming terminal & programmable fixed part with selectively powered buffer memory The system includes a basic recorder module where a delay element is followed by a solid state buffer memory, digital interface circuits for transferring the recorded data, processing means, a printer and/or magnetic memory unit, a detachable programming ... | 11/12/1985 |
