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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 8085010 | TRIAC/SCR-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation A TRIAC/SCR-based energy savings device, system and method (1) wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy. Phase input connections (2) are provided... | 12/27/2011 |
| 8085009 | IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation An IGBT/FET-based energy savings device, system and method (1) wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy. Phase input connections (2) are provided... | 12/27/2011 |
| 7973519 | Device for transforming a primary AC voltage in a lower AC voltage in a lower AC voltage for supplying an electrical load A device for transforming an AC voltage to a lower AC voltage includes a generator of a PWM control signal and a first bidirectional switch to couple a load to the AC voltage during a conduction-phase. A second bidirectional switch discharges energy from the load du... | 07/05/2011 |
| 7423413 | Power supply for a load control device A power supply for a load control device is disposed in series with an AC voltage source and a load and generates a substantially DC voltage for powering a controller of the load control device. The power supply is operable to provide substantially all voltage provi... | 09/09/2008 |
| 7397225 | Apparatus for controlling the power of an AC voltage supplying an electrical consumer by phase control and method for reducing harmonics An apparatus for controlling the power of an AC voltage supplying an electrical consumer (14) by phase control and for reducing harmonics caused by said phase control, particularly within a range of 4 kHz, preferably within a range of the third harmonic, comp... | 07/08/2008 |
| 7341481 | Power control circuit The present invention provides for a highly reliable circuit, suitable for controlling the delivery of electrical power to a second electrical outlet, based on the power consumption of a first outlet. This circuit has application in home, small workshops and on job-... | 03/11/2008 |
| 7291984 | Method of reducing RMS load voltage in a lamp using pulse width modulation A method of converting a line voltage to an RMS load voltage in a lamp includes modulating a load voltage with a pulse width modulation circuit that is entirely within the lamp and provides an RMS load voltage to a light emitting element of the lamp. Conduction is t... | 11/06/2007 |
| 7274148 | Lamp having fixed forward phase switching power supply with time-based triggering A lamp contains a lamp voltage conversion circuit that is entirely within a base for converting a line voltage at a lamp terminal to an RMS load voltage at a light emitting element. The voltage conversion circuit includes a forward clipping circuit with a three-term... | 09/25/2007 |
| 7247999 | Dimmer for use with a three-way switch A smart dimmer for controlling the intensity of a lighting load from a source of AC power is operable to replace one of the three-way switches in a standard three-way lighting system without the need to replace the other three-way switch with a unique accessory swit... | 07/24/2007 |
| 7242563 | Reverse phase control power switching circuit with overload protection In one embodiment of the invention, a reverse phase control power switching circuit for controlling the flow of current through a load from an AC source comprises a sensing bridge in series with the load and the AC source. The conductive state of the sensing bridge ... | 07/10/2007 |
| 7227341 | Circuit for use with switched leg power supply A circuit for use with a power supply coupled in a switched leg of, for example, a lighting circuit, is described. The circuit provides a low impedance near the zero crossing of the AC signal and a high impedance thereafter, thereby allowing the power supply to draw... | 06/05/2007 |
| 7221106 | Cordset based appliance controller An apparatus and method for distributed control of an electrical appliance having a plug and a load and two power carrying conductors connecting the plug to the load, comprising locating power control elements completely within the plug, connecting interface element... | 05/22/2007 |
| 7154250 | Buck-boost DC—DC switching power conversion Apparatus operates at a power level within a range of power levels that includes a rated maximum power level of the apparatus. The apparatus includes circuit elements to deliver power at an output voltage to a load from a source at an input voltage using an inductor... | 12/26/2006 |
| 7129653 | Self-contained, self-snubbed, HID dimming module that exhibits non-zero crossing detection switching A protection circuit for an HID dimming circuit is provided. A resistive component limits the initial current after a relay closes and current flows from a charged capacitor to a second capacitor. An inductive component limits the rate of change of current through t... | 10/31/2006 |
| 7068008 | Electronic device for controlling a discharge pump driven by a synchronous electric motor with a permanent-magnet rotor The present invention relates to an electronic device (10) for controlling a discharge pump, driven by a synchronous electric motor with a permanent-magnet rotor (3) and of the type comprising at least a controller (1) receiving at its input a s... | 06/27/2006 |
| 7061195 | Global closed loop control system with dv/dt control and EMI/switching loss reduction A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides ... | 06/13/2006 |
| 7038399 | Methods and apparatus for providing power to lighting devices Methods and apparatus for providing power to devices via an A.C. power source, and for facilitating the use of LED-based light sources on A.C. power circuits that provide signals other than standard line voltages. In one example, LED-based light sources may be coupl... | 05/02/2006 |
| 7019498 | Power factor correction circuit A method of power factor control for a power regulation system connected for supplying electric power to a reactive load, the power factor being characterized by a phase difference between a voltage waveform and an induced current waveform, the method comprising the... | 03/28/2006 |
| 6995965 | Clothes dryer over-voltage control apparatus and method An over-voltage control device for a clothes dryer including an electrical heater coupled to an alternating current power supply is provided. The device includes a switch device adapted to connect and disconnect the power supply from the heater, and a micro-controll... | 02/07/2006 |
| 6930459 | Method for reducing the influence of a DC current component in the load current of an asynchronous motor A method with which the load current and thus the load moment of an asynchronous motor that is controlled via a phase-controlled two-phase thyristor power controller, can be easily influenced so as to allow a smooth starting operation. According to a first embodimen... | 08/16/2005 |
| 6813720 | Method of and device for supplying electrical power to a load using a power modulation system including at least one controlled switch and overvoltage counting apparatus The operating mode of a power modulation system is determined according to the nature of the load. The power modulation system can operate in either of two operating modes, namely a “reverse phase control” mode and a “forward phase control” mode. To this end... | 11/02/2004 |
| 6771056 | AC controller with reverse blocking IGBT A method for operating an alternating-current (AC) controller system includes providing a first bi-directional switch coupled to a load and an AC power source. The first bi-directional switch is a solid-state device. The first switch is turned on in a first half-cyc... | 08/03/2004 |
| 6621254 | AC voltage triac regulator A method of providing a regulated AC output voltage at a predetermined level that makes use of an AC input voltage having a higher level, includes the steps of rectifying the input voltage to provide a DC input reference voltage, rectifying the output vol... | 09/16/2003 |
| 6590349 | Bidirectional flip-flop A bidirectional switch, including a first bidirectional switch between two power terminals of the switch, a low-voltage storage element between a first power terminal and a control terminal of the switch, and a control stage adapted to cause, upon each ha... | 07/08/2003 |
| 6548983 | PWM-pulse control system A power modulation control system using PWM pulses is provided. The system comprises an AC voltage generator, an electric load, and a control circuit incorporating at least one rectifier. The electric load is connected between the generator and the rectif... | 04/15/2003 |
| 6509724 | Housekeeping power supply for electronically controlled loads A circuit for loading the rectified AC voltage bus in a housekeeping power supply for an electronically controlled load is provided for avoiding large increases in the rectified AC bus voltage upon disconnecting the load. The load circuit includes a curre... | 01/21/2003 |
| 6404171 | Alternating-current electric power controlling apparatus and method for controlling supply of alternating-current electric power to electric load An alternating-current electric power controlling apparatus including a switch and a controller. The switch is configured to be turned on or off to connect or disconnect an alternating-current electric power source and an electric load. The controller is ... | 06/11/2002 |
| 6385732 | Apparatus for and method of inhibiting and overriding an electrical control device An apparatus for and method of inhibiting and overriding the normal operating mode of an input device connected to a communications network function within an electrical network made up of input devices, with a group of the input devices being capable of ... | 05/07/2002 |
| 6356060 | Switching circuit and method for use in a switching circuit The present invention relates to a bidirectional switching circuit including, in series, a bidirectional switching element controllable to be turned off and turned on, and a bidirectional conduction element forming a dipole and automatically selecting the... | 03/12/2002 |
| 6294901 | Power dimmer The present invention relates to a power dimmer of a load, powered by an a.c. voltage, of the type including a bidirectional switch associated in series with the load, the switch being normally closed and controllable to be opened upon each halfwave of th... | 09/25/2001 |
| 6269012 | Energy efficient power supply with light-load detection An output voltage of a rectification smoothing circuit is compared with a reference voltage. When a reduction in the output has been detected, an A/D converting circuit converts a result of the comparison which is negatively fed back by an output voltage ... | 07/31/2001 |
| 6236192 | AC voltage regulator An AC voltage regulator, which not only has a fast response speed with respect to input voltage fluctuations but also is small in size and light in weight and is capable to boost an input voltage, comprises a high-frequency transformer 4, a first bi-direc... | 05/22/2001 |
| 6208126 | Circuit having a bidirectional switch for supplying a load from an AC voltage supply A circuit is provided for supplying a load from an AC voltage supply. The circuit includes a control circuit and a bidirectional switch coupled in series with the load. The bidirectional switch includes two one-way switches connected in antiparallel, and ... | 03/27/2001 |
| 6194881 | Switching power supply for lowered distribution system disturbance A switching power supply system is disclosed for powering electrical equipment while minimizing disturbance to an AC power line source. The system includes first and second AC switches which are operated at alternate intervals with respect to each other t... | 02/27/2001 |
| 6191964 | Circuit and method for controlling a synchronous rectifier converter For use in a power system having a power train, a rectifier having an input and an output and a method of controlling the rectifier. The rectifier comprises: (1) switching circuitry coupled between the input and the output, the switching, circuitry adapte... | 02/20/2001 |
| 6175220 | Short-circuit protection for forward-phase-control AC power controller A thyristor-based forward phase control (FPC) system for controlling the power delivered to a load from an AC power source employs a short-circuit test cycle to protect the thyristor from damage. Upon activation of the FPC system, the thyristor is trigger... | 01/16/2001 |
| 6138241 | Apparatus for and method of inhibiting and overriding an electrical control device An apparatus for and method of inhibiting and overriding the normal operating mode of one or more input devices connected to a communications network. The present invention functions within an electrical network made up of a plurality of input devices whe... | 10/24/2000 |
| 6101108 | Regulated input current, regulated output voltage power converter The power conversion system of this invention achieves precisely regulated input current and precisely regulated output voltage in a two step process whereby one power converter sub-system (141) provides input current regulation and a second power convert... | 08/08/2000 |
| 6072304 | Circuit and method for triggering a thyristor An improved trigger circuitry for a high side thyristor application having a thyristor connected to an A/C line, a capacitor connected across the A/C line to A/C neutral through impedance, an electronic switch connected from the thyristor to the junction ... | 06/06/2000 |
| 6057674 | Energy saving power control system Apparatus and methods for AC power regulation primarily intended for inductive loads (e.g., fluorescent lights, motors, etc.) which provide substantial reduction in power consumption while also providing a leading power factor, reduced harmonic distortion... | 05/02/2000 |
