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Dining Table Having Integral Dishwasher
A space-saving dishwasher, which may be installed within a counter top or table, having a dish-carrying rack that is vertically shiftable through the open top of the dishwasher for facilitating loading and unloading of the dishes.
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| Number | Title | Issue Date |
| 8155796 | Protective relay device Data from a digitizing unit is stored in a time-series data buffer, via a data receiving circuit. The data on which a digital filtering process is performed by a digital filtering processing circuit is stored in time series in a time-series instantaneous-value data ... | 04/10/2012 |
| 7280938 | Method for determining a negative sequence component The invention relates to a method for determining properties of a negative sequence component of a space vector quantity in an electrical network. The method according to the invention includes the steps of determining on the basis of the properties of an ellipse fo... | 10/09/2007 |
| 7275001 | Method for measuring electrical current levels in a power switching device A method for determining an electrical current value using at least two current sensing circuits. One current sensing circuit is provided if the current value is below a switching threshold. The other current sensing is provided if the current value is above a switc... | 09/25/2007 |
| 7016174 | Instantaneous fault detection circuit method and apparatus An algorithmic system for an electronic trip unit is provided whereby reliable instantaneous protection is provided. A multi-algorithmic approach uses an algorithm to detect bolted faults based on a direct comparison of the current and a threshold value, and an addi... | 03/21/2006 |
| 6985800 | Protection of an electric power transmission network For the control of an electric power transmission network, where local protection functions are implemented by a plurality of local protection devices (3,3a,3b,3b′,3c) located at a plurality of locations thro... | 01/10/2006 |
| 6871225 | Synthetic corn hybrid P67 A revision to a Power Management Control System includes an improved waveform client/waveform server communication interface based on a first inter-process communication protocol, preferably DCOM. The first inter-process communication protocol preferably resides in ... | 03/22/2005 |
| 6772075 | System and method for locating a disturbance in a power system based upon disturbance power and energy A disturbance locating system deployed within a power grid to estimate a location of a disturbance in a power system includes a voltage transducer, a current transducer and disturbance energy determination circuitry. The system may also include disturbance power det... | 08/03/2004 |
| 6718213 | Variable base load energy management system and method The present invention is a system and method for variable base load demand-side energy management. The system of the present invention includes a power reduction device receiving electrical power from an electrical power source and outputting electrical power to a l... | 04/06/2004 |
| 6675071 | Power quality utility metering system having waveform capture A method of monitoring variations is carried out within an electrical energy meter containing means therein for metering a quantity of electrical energy generated by a supplier and transferred via a power supply line to a load. The method includes a first... | 01/06/2004 |
| 6473723 | Mimic high pass filter in a protective relay A mimic filter which can be implemented in analog or digital circuitry, and which removes dc offset or other noise from an input signal using a pseudo-differentiation technique. The input signal is adjusted by a feedback value, and the adjusted signal is ... | 10/29/2002 |
| 6459998 | Sensing downed power lines In systems embodying the invention, a "downed" power line is detected by sensing whether there is an open circuit along the power line and producing an indication that an open circuit condition exists. In response to an indication that an open circuit con... | 10/01/2002 |
| 6459960 | Distance relay equipment A short-circuit distance relay has a short-circuit distance relay element that calculates a fault impedance from voltage and current which are introduced from a power system and that compares the fault impedance with a set impedance and uses the fault imp... | 10/01/2002 |
| 6459997 | Method for event analysis at an intelligent electronic device A method of event analysis in an intelligent electronic device is presented. The intelligent electronic device includes a microprocessor and associated memories. An algorithm (program) stored in a memory of the intelligent electronic device analyzes event... | 10/01/2002 |
| 6360178 | System and method for locating a disturbance in a power system based upon disturbance power and energy A disturbance locating system deployed within a power grid to estimate a location of a disturbance in a power system includes a voltage transducer, a current transducer and disturbance energy determination circuitry. The system may also include disturbanc... | 03/19/2002 |
| 6185482 | System and method for rms overcurrent backup function A method and apparatus for over current backup protection is provided. The method generates a set of root mean square (rms) values from samples that are taken from the system current. Several rms current values are averaged to generate an estimated rms ov... | 02/06/2001 |
| 6173216 | Protective relay with improved, sub-window cosine filter As a variation of the non-orthogonal filter, a phasor estimate is computed by using an N-point window. An aspect of the sub-window cosine filter is to repeat the basic cosine filter for only selected points of the window. In the end, a least-squares fit i... | 01/09/2001 |
| 6154687 | Modified cosine filters A high sample rate cosine filter eliminates DC components by summing them such that they sum to zero. A non-orthogonal cosine filter is also provided. When the cosine filter is applied for N=4 samples per cycle, the samples are separated by 90 degrees. Ho... | 11/28/2000 |
| 6141634 | AC power line network simulator In an illustrative embodiment, the AC power line network simulator includes an enclosure for containing elements of the system. An AC coupling network coupled to the network simulator implements the functions relating to a particular simulation. A distrib... | 10/31/2000 |
| 6112136 | Software management of an intelligent power conditioner with backup system option employing trend analysis for early prediction of ac power line failure A software management system of an intelligent power conditioner with backup system option employing trend analysis for early prediction of AC power line failure. An AC line power conditioner utilizing a microprocessor based control system for providing s... | 08/29/2000 |
| 6104967 | Fault-tolerant battery system employing intra-battery network architecture A distributed energy storing system employing a communications network is disclosed. A distributed battery system includes a number of energy storing modules, each of which includes a processor and communications interface. In a network mode of operation,... | 08/15/2000 |
| 6081768 | Digital peak detector A method and system for detecting the peak of respective half-cycles of a sinusoidal waveform. The sinusoidal waveform is rectified and only sample points above a first threshold are analyzed. The peaks of each half-cycle are only accepted if they are abo... | 06/27/2000 |
| 5839093 | System for locating faults and estimating fault resistance in distribution networks with tapped loads Both fault location and fault resistance of a fault are calculated by the present method and system. The method and system takes into account the effects of fault resistance and load flow, thereby calculating fault resistance by taking into consideration ... | 11/17/1998 |
| 5768079 | Adaptive ground and phase fault detection for a power distribution system An adaptive method and apparatus for detecting fault conditions in a power distribution system that services both single phase loads and three phase loads. The present invention accomplishes this by providing an adaptive ground fault detection method and ... | 06/16/1998 |
| 5724247 | Method of generating a signal indicating the direction of a short-circuit A process for generating a direction signal indicating the direction of a short-circuit current in a power transmission line to be monitored. To reliably produce a direction signal even in the event of a short-circuit occurring in the proximity of the con... | 03/03/1998 |
| 5608327 | Methods and apparatus for identifying faulted phases on an electric power transmission line The invention provides method and apparatus for identifying the faulted phases on the occurrence of a single phase fault simultaneously on both circuits of a double circuit electric power transmission line using measurements taken at one end only of the l... | 03/04/1997 |
| 5426590 | Device for numerical computation of a symmetrical component of an electtical quantity of a three-phase power system and relay incorporating it The computing device comprises non-recursive, digital filters, with finite impulse response, computing, from samples taken over a period of the power system, for at least two distinct phases, two components with a phase difference of 90° between them and... | 06/20/1995 |
| 5170360 | Computer-based metering arrangement including a circuit interrupter A circuit breaker system uses a microprocessor for calculating at least one function of a measured current flow. The microprocessor provides other functions such as serial data stream communications, the ability of many circuit breaker systems to communic... | 12/08/1992 |
| 5164876 | Static trip device comprising an earth protection desensitization system The differential tripping threshold of the trip device is a polynomial function of an order greater than or equal to two of the highest phase current flowing in the power system protected by the circuit breaker comprising the trip device.... | 11/17/1992 |
| 5058031 | Multilevel phase unbalance compressor motor protection system A method of protecting the compressor motor of a refrigeration system using a multiphase AC power source. The method comprises the steps of monitoring each phase of the power supply to the compressor motor; calculating the average phase for the phases of ... | 10/15/1991 |
| 4879624 | Power controller A system is disclosed for sequentially disconnecting multiple phases of a first power source (12) from an electrical load (14) requiring a minimum of interruption and connecting a second power source (28) to the electrical load. A first embodiment of the ... | 11/07/1989 |
| 4878142 | High resistance ground fault protection A protection device for high resistance ground faults in a power network according to the invention has a fault detection principle which is based on an indirect study of non-harmonic frequency components of the phase currents. When such a fault has occur... | 10/31/1989 |
| 4864453 | Protective relay with selective phase selection for double lines The invention comprises a protective relay with selective phase selection in electric power distribution systems when there are double transmission lines (M1-P1,M2-P2) between two stations (TM, TP) and where the ends of the line are connected to a common ... | 09/05/1989 |
| 4855861 | Longitudinal differential protection The present invention comprises a longitudinal differential protective relay for protection and supervision of power line zones in a distribution system. The protective relays are located at each end of the zones that are desired to be monitored. One of t... | 08/08/1989 |
| 4835706 | Centralized control system for controlling loads such as an electric motor A centralized control system for controlling loads includes local or slave control stations, the number of which corresponds with the number of electric motors as loads, the local control stations each executing control of the making and breaking of each ... | 05/30/1989 |
| 4731689 | Directional detection in connection with faults in a power supply network A method and a device for directional detection of a fault on a power transmission line extending between two stations (P, Q). In one of the stations (P) there is a travelling wave model which, by means of currents and voltages measured in the station, ca... | 03/15/1988 |
| 4694373 | Circuit breaker with digital solid-state trip unit with optional functions Digital solid-state trip unit designed to provide protection against phase faults, notably overloads and short-circuits and optional functions, in this case ground fault protection and load shedding and restoring functions. Two parameter input switches (7... | 09/15/1987 |
| 4663539 | Local power switching control subsystem Each digital module in a network is provided with a local power switching control subsystem wherein the local module uses a local power switching control logic card which controls main power and subordinate power units in a predetermined sequence. Power u... | 05/05/1987 |
| 4557686 | Control of the flow of fuel to multiple burners The flow of offgas from a common source as a fuel for multiple boilers is controlled so as to maintain a desired minimum pressure for the offgas supply unless the maintenance of such a desired minimum pressure would result in so much offgas being supplied... | 12/10/1985 |
| 4541058 | Protective relay system A protective relay system for protecting a power system includes a selection circuit, a comparing circuit, and a data processing unit. The selection circuit time-sequentially switches a plurality of input signals having electrical quantities from the powe... | 09/10/1985 |
| 4511981 | Protective relaying system A protective relaying system which detects a fault in an electric power system having a circuit breaker by using a current and a voltage of the electric power system. The protective relaying system includes input conversion unit adapted for connecting the... | 04/16/1985 |
