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| Number | Title | Issue Date |
| 6859042 | Arc detection by non-causal signal correlation A method and apparatus for detecting electrical arcs in an electrical system having a periodic power supply is disclosed. A method according to the invention compares instantaneous values of a monitored waveform both with (a) their past values at corresponding phase... | 02/22/2005 |
| 6781381 | Electric arc synthesis for arc detector testing and method for arc testing A system for arc detection testing using synthesized arcs is disclosed, which uses voltage and current waveform generators to generate an arc's analog form voltage and current waveform from a digital form of the arc's captured waveforms. A voltage waveform amplifier... | 08/24/2004 |
| 6772077 | Electric arc monitoring systems Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena in that all essential information that signifies “arc” is contained in each fractal subset. These fractal subsets are logarithmically distributed over the ar... | 08/03/2004 |
| 6707688 | Electric apparatus with electric terminals and fused structures Electric apparatus having distinct electric terminals has an input power terminal of electrically insulating material, including a base of electric insulating material having a first electric terminal base portion and a second electric base portion spaced from that ... | 03/16/2004 |
| 6402572 | Electric switching device assembly system An electric switching device is assembled with an electric terminal and a power panel having a first side at the electric switching device and second side at the electric terminal. The electric switching device has a prong, and a receptacle is made for th... | 06/11/2002 |
| 6400258 | Electric arc monitoring systems Systems of monitoring electric arcs substantially eliminate alternating current fundamentals and harmonics from monitored arc signatures. Such systems phase shift, delay or otherwise store a representation of the alternating current fundamental and harmon... | 06/04/2002 |
| 6362629 | Electric arc monitoring systems Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena in that all essential information that signifies an "arc" is contained in each fractal subset. The fractal subsets are logarithmically distributed ove... | 03/26/2002 |
| 6356450 | Circuit board holders and assemblies A circuit board holder has or is provided with a face plate and with walls projecting from an inside of that face plate. A pair of opposite ones of such walls are equipped with circuit board retainers. Such retainers may be inside and/or outside of a spac... | 03/12/2002 |
| 6229707 | Calamity-proof electrical equipment cabinet door systems Electrical equipment is housed in a cabinet and is protected against hurricane-force calamities by covering the electrical equipment with an inner door system inside the cabinet, and by closing an opening of the cabinet with an environmental door system, ... | 05/08/2001 |
| 6133739 | Electric battery monitoring systems A method of monitoring electric battery capacity effects evaluation of battery capacity in terms of battery current and battery voltage in a succession of monitoring cycles, scales down an influence of battery current on the evaluation as the succession o... | 10/17/2000 |
| 6006925 | Equipment rack system An equipment rack has horizontal frame structure, and vertical frame structure of sheet material, secured to that horizontal frame structure and having a bent cross-section and opposite ends. The bent cross-section has a square-wave configuration includin... | 12/28/1999 |
| 5574251 | Electrical and electronic cabinet systems A cabinet has a top, an opposite bottom, a front, an opposite rear, and sides extending between that front and that rear for containment of electrical equipment requiring different groups of electric conductors. One of these sides is segmented between the... | 11/12/1996 |
| 5477150 | Electric arc and radio frequency spectrum detection A principal object of the invention is to detect sparks or arcs (12) in electric circuits (13) or otherwise to detect a spectrum of a broad band of distinct instaneous radio frequencies in radio frequency noise. The invention rejects extraneous narrow-ban... | 12/19/1995 |
| 5373241 | Electric arc and radio frequency spectrum detection A principal object of the invention is to detect sparks or arcs (12) in electric circuits (13) or otherwise to detect a signal having a spectrum of a broad band of distinct instantaneous radio frequencies in radio frequency noise. The invention rejects ex... | 12/13/1994 |
| 5363613 | Rigid supporting structures A supporting structure of one piece of sheet material constituting a top and several legs depending from that top in one piece has for each of these several legs an angled profile of that one piece of sheet material and in one piece with the top across th... | 11/15/1994 |
| 5004107 | Earthquake braced racks An electronic equipment rack including a horizontal frame member and a vertical frame member is braced against earthquake damage by means of a metal gusset having a first leg fitting against the horizontal frame member to extend along part of that horizon... | 04/02/1991 |
| 4983955 | Electric power supply circuit monitoring systems Monitoring an electric power distribution circuit having a rated load capacity includes continually sensing an intensity of electric power supplied through that circuit. In response to that sensing a first signal indicating when electric power is supplied... | 01/08/1991 |
| 4853820 | Electronic circuit breaker systems Electronic circuit breakers safeguard a load connected to a power supply against damage from overload conditions. These circuit breakers interrupt flow of overload currents to the load by instantaneously reducing flow of such current from the power supply... | 08/01/1989 |
