Famous Patents
British merchant Peter Durand invented the tin can in 1810.
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 |
| 7362599 | Switching power supply with capacitor input for a wide range of AC input voltages A switching power supply includes a bridge rectifier, a switching device, and a controller. The bridge rectifier is operatively coupled to an alternating current (ac) signal, and outputs a rectified signal. The switching device is electrically connected in parallel ... | 04/22/2008 |
| 7358689 | Phase-control power controller for converting a line voltage to a RMS load voltage A phase-control power controller converts a line voltage to an RMS load voltage and includes a phase-control clipping circuit that clips a load voltage to provide the RMS load voltage. The power controller may be in a base of a lamp and connected to a lamp terminal.... | 04/15/2008 |
| 7301291 | Power controller having current limited RMS regulated output A power controller converts a line voltage to an RMS load voltage for a lamp, and includes a switch and a microcontroller that operates the switch to define the RMS load voltage. The microcontroller senses a load voltage of the lamp, compares the sensed load voltage... | 11/27/2007 |
| 7274117 | Radio wall switch A radio wall switch that uses radio signals to control a load through a load circuit is disclosed. The radio wall switch is also configured group or bind electronic devices to operate collectively by responding to the same radio control signals. Preferably, the radi... | 09/25/2007 |
| 7251587 | Flexible scanning and sensing platform A detection method and apparatus that includes a controller and a plurality of remote sensor units, each containing sensor elements, connected to the controller to achieve custom detection profiles and resolutions that are optimized for a given application by altera... | 07/31/2007 |
| 7239810 | System for controlling an electrical device A system for controlling an electrical device that includes an enclosure and an optical signal. ... | 07/03/2007 |
| 7233081 | Power-supply device A power-supply device suppresses high harmonic waves, controls the flow of AC power, and minimizes adverse effects on a load that might otherwise be caused by a large surge of current into the load during the startup or stopping of the power-supply device. The power... | 06/19/2007 |
| 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 |
| 7210656 | Control, sound, and operating system for model trains A model train operating, sound and control system that provides a user with increased operating realism. A novel remote control communication capability between the user and the model trains. This feature is accomplished by using a handheld remote control on which v... | 05/01/2007 |
| 7123140 | Network for remote administration of street lighting inter alia and methods to carry out said administration A wireless network for remotely controlling at least one lamp includes a first radio transceiver associated with the at least one lamp and a second radio transceiver. The first radio transceiver further includes a circuit for controlling the at least one lamp as a f... | 10/17/2006 |
| 7107977 | Ignition apparatus for internal combustion engine An ignition apparatus for an internal combustion engine, which is controlled by a control unit, includes a connector, an ignition coil assembly, an igniter and a capacitor. The connector is electrically connected with the control unit, and includes an input terminal... | 09/19/2006 |
| 7110228 | Separated power ESD protection circuit and integrated circuit thereof A separated power ESD protection circuit is disclosed. The separated power ESD protection circuit is coupled between a first and a second power lines. The separated power ESD protection circuit has a first diode, a second diode and a MOS transistor. The first diode ... | 09/19/2006 |
| 7075289 | Wireless remote control measuring multipurpose meter The present invention discloses a wireless remote control measuring multipurpose meter, which comprises a signal transmitter, a signal receiver, and a signal converter for converting a measured signal into a readable digital signal. The digital signal is transmitted... | 07/11/2006 |
| 6944835 | Delay circuit, testing apparatus, and capacitor A delay circuit having an adjustable delay resolution is provided. The delay circuit has a path through which a signal transmits, a field effect transistor whose source region and drain region are connected to the path, and an impressed voltage control unit which co... | 09/13/2005 |
| 6908214 | Variable beam LED light source system A diode light source system for stage, theatrical and architectural lighting has numerous separate flat, rigid panels for mounting light emitting diodes that emit diode light beams to a common focal area. Each panel is mounted with a group of these diodes, and each ... | 06/21/2005 |
| 6841984 | Power source regulator for wireline cable system A system (150) for controlling voltage supplied to a transmission line system. System (150) includes a transmission cable (134) having a characteristic impedance and a load impedance connected at its distal end. A power source (154) is co... | 01/11/2005 |
| 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 |
| 6690150 | Method and a system for producing a power supply voltage for controlling an electronic switch A direct current supply voltage for controlling an electronic switch, for example a triac, is obtained from a residual voltage at the terminals of the switch when it is conducting. The electrical energy needed to produce an auxiliary power supply voltage ... | 02/10/2004 |
| 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 |
| 6522119 | Power source regulator for wireline cable system A system (150) for controlling voltage supplied to a transmission line system. System (150) includes a transmission cable (134) having a characteristic impedance and a load impedance connected at its distal end. A power source (154) is connected to transm... | 02/18/2003 |
| 6281669 | Circuit arrangement and method for limiting current for consumers of alternating current In a circuit arrangement for limiting peak current, an inverter provides at an AC voltage output a series circuit of a consumer and a rectifier unit connected across the output. A current limiter connects across output terminals of the rectifier unit. The... | 08/28/2001 |
| 6271653 | Power supply operable with wide input range An arrangement provides a power supply for low voltage circuits that is connected to receive and store energy from a power electronics switch that is connected to an alternating current supply. The power supply is operative over a wide range of input and ... | 08/07/2001 |
| 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 |
| 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 |
| 5953221 | Circuit breaker or contact system with a multi-range power supply unit and a multi-range power supply unit A multi-range power supply unit with an automatic switchover between ranges for different power supply voltages is disclosed for use with devices such as circuit breakers or contact systems. The power supply unit preferably has only two input connections ... | 09/14/1999 |
| 5852357 | System and method for controlling an alternating current (AC) signal A system for controlling an Alternating Current (AC) signal to an AC powered device. The system uses a microcontroller to monitor the cycles of the AC signal supplied to the AC powered device. By utilizing cycle counting, the microcontroller can supply va... | 12/22/1998 |
| 5714861 | Variable speed control for a hand-held electric power tool A power tool has a variable speed control circuit that comprises a user switch, a motor and a silicon controlled rectifier (SCR) connected in series between a pair of power supply terminals. A manually variable resistor is connected between a first electr... | 02/03/1998 |
| 5635827 | Power control system A power control system in a DIN rail mount assembly for switching power in a low cost, compact, and solid state for controlling electric heaters. The system can be used for single phase, three phase-two leg, and three phase-three leg. Current switching ca... | 06/03/1997 |
| 5576614 | Circuit for supplying constant voltage to a lamp from an AC input A circuit is provided for obtaining precise lamp voltage control and for compensating for varying or fluctuating input from an AC voltage source. The lamp is switched on by a switching device such as a triac. When the triac is powered, a simultaneous powe... | 11/19/1996 |
| 5530748 | Power supplying system for terminal A power supplying system is adapted to a subscriber terminating equipment that supplies power to a subscriber terminal equipment based on a supply of power from an external power supply part. The power supplying system includes an excess current limiting ... | 06/25/1996 |
| 5519311 | Control of AC power to inductive loads A control system is provided for controlling the average power from an alternating voltage source (AC) to a load having inductive properties. The system uses a synchronous switch shunted by a capacitor connected between the source (generator) and sink (lo... | 05/21/1996 |
| 5512810 | Variable speed control for a hand-held electric power tool A power tool has a variable speed control circuit that comprises a user switch, a motor and a thyristor connected in series between a pair of power supply terminals. A manually variable resistor is connected between a first electrode of the thyristor and ... | 04/30/1996 |
| 5406191 | Procedure and apparatus for the control of electric power Procedure and apparatus for the control of electric power, by which procedure the electric power supplied to a load is regulated by means of a regulator, e.g. a thyristor regulator. The regulator control signals, e.g. thyristor firing pulses, are produced... | 04/11/1995 |
| 5365162 | Light bulb electric life extender having a diactriac combination connecter in parallel with a capacitor An electric bulb saver is provided for use with light bulb sockets in either 110 V or 220 V screw type or bayonet circuits. The device includes circuitry comprising a resistor, a capacitor and a rectifier. The circuitry may also include in specified combi... | 11/15/1994 |
| 5345166 | Regulated voltage two-wire detector Detector comprising a sensor and a processing circuit connected to a load by means of two wires. Two switches (I1, I2) are arranged in series in a switching circuit leg (21), the ends of which (C, D) are connected to the detector terminals and the middle ... | 09/06/1994 |
| 5327047 | Electrical dimmer system employing alternately applied silicon controlled rectifiers A dimmer control system includes two discrete silicon controlled rectifiers which respectively energize a lamp load during alternate half cycles of the input AC voltage. The separate placement of the SCRs ensures that much lower temperatures are reached t... | 07/05/1994 |
| 5309084 | Electronic switch with on/off fading The present invention provides a electronic switch suitable for fading on/off control of electrical equipment like lamps and motors. The main circuit comprises a rectifier bridge circuit and a thyristor. A control circuit includes a fast discharging synch... | 05/03/1994 |
| 5294839 | Soft start AC tool handle trigger switch circuit A soft start tool handle trigger switch circuit (10) applies voltage from an AC source (12) to a portable tool electric motor (10). A current limiter (30) is connected in series between the AC source (12) and motor (14). A first sub-circuit (32) is connec... | 03/15/1994 |
| 5247242 | Output module An output module which is used in a factory automation control apparatus is disclosed. The output module is connectable to both of AC and DC power sources, which is constituted by a control element controlled by the output signal in the factory automation... | 09/21/1993 |
