Quotables
"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
The Quarterly Review ; March edition, 1825
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 |
| 8089262 | Compact and lightweight power converter for high power comsumption loads An apparatus for shaping a varying input voltage signal received at an input locus to effect a desired varying output voltage signal at an output locus includes: (a) at least one energy transferring unit coupled with the input locus and with the output locus; and (b... | 01/03/2012 |
| 7855543 | Force invariant touch sensitive actuator A load control device, such as a dimmer switch, has a touch sensitive actuator, such as a three-wire touch sensitive screen, that produces an output voltage representing the position of a manual pressure touch along a longitudinal axis of the actuator. A stabilizing... | 12/21/2010 |
| 7548052 | AC power source controller An AC power source controller includes an input side, which is electrically connected to an output side via a power source controlling interface; and a phase modulator, which is electrically connected to the power source controlling interface. The phase modulator in... | 06/16/2009 |
| 7352161 | Burst-mode switching voltage regulator with ESR compensation System and method for a burst-mode switching voltage regulator with good stability and small output voltage ripple. A preferred embodiment comprises a current sense circuit coupled to a power switch in the burst-mode switching voltage regulator to sense a current fl... | 04/01/2008 |
| 7340626 | Image forming apparatus An image forming apparatus includes a main power supply section, an auxiliary power supply section, a plurality of sensors, and a power control section. The sensors are disposed at a plurality of positions. The sensors change output levels thereof upon detection of ... | 03/04/2008 |
| 7329840 | Heater lamp control apparatus and method to detect an inputted AC voltage and providing a pulse signal to correspond thereto A heater lamp control apparatus and method of detecting an input AC voltage and providing a pulse signal corresponding thereto, includes an AC voltage phase detection unit to detect a phase of the inputted AC voltage when a magnitude of the inputted AC voltage is ov... | 02/12/2008 |
| 7312585 | Remote control of electronic light ballast and other devices An electronic ballast system controls one or more ballasts of HID or fluorescent lamps, which are controlled in an “on/off” manner by a ultra low power controller that is isolated for a primary power circuit or derives its very low switch power from the ballast ... | 12/25/2007 |
| 7235900 | Switching apparatus and method for varying a phase line impedance of an electric power transport line section The switching apparatus and method are provided for varying the impedance of a phase line of a segment of an electrical power line. The phase line includes n conductors electrically insulated from each other and short-circuited among each other at two ends of the se... | 06/26/2007 |
| 7129651 | Remote control of electronic light ballast and other devices An electronic ballast system controls one or more ballasts of HID or fluorescent lamps, which are controlled in an “on/off” manner by a ultra low power controller that is isolated for a primary power circuit or derives its very low switch power from the ballast ... | 10/31/2006 |
| 7116062 | Method of soft-starting a switching power supply including pulse width modulation circuit A method of operating a power controller that converts a line voltage to an RMS load voltage includes a soft start in which a duty cycle of a pulse width modulation circuit is gradually increased to a steady state value that defines the RMS load voltage. The control... | 10/03/2006 |
| 7091670 | Safety interlock apparatus and method A safety interlock apparatus for an electrical device includes a DC power supply, a ballast power supply including a ballast control circuit that controls a ballast power circuit, and a lamp. A relatively low voltage electrical connection is present between the DC p... | 08/15/2006 |
| 7053562 | Lamp containing soft-start power supply A lamp includes a lamp voltage conversion circuit which converts a line voltage to an RMS load voltage by clipping or modulating a load voltage. The voltage conversion circuit includes a time-based signal source that triggers conduction in the voltage conversion cir... | 05/30/2006 |
| 7049758 | Method of soft-starting a switching power supply having time-based pulse triggering control A method of operating a power controller that converts a line voltage to an RMS load voltage includes a soft start in which a conduction angle or duty cycle is gradually increased to a steady state value that defines the RMS load voltage. The controller has a circui... | 05/23/2006 |
| 7034469 | Phase-control power controller with analog RMS load voltage regulation A phase-control power controller that converts a line voltage to an RMS load voltage includes an analog load voltage sensor that includes a light emitter that provides an optical output related to an RMS load voltage, and a phase-control circuit that has a compariso... | 04/25/2006 |
| 7030567 | Phase-control power controller with digital RMS load voltage regulation A phase-control power controller that converts a line voltage to an RMS load voltage includes a phase-control circuit with a potentiometer and a capacitor whose resistance and capacitance determine clipping of a load voltage, a load sensing circuit that senses the l... | 04/18/2006 |
| 7029145 | Low voltage decorative light string including power supply One or more strings of decorative lights are supplied with power by converting a standard residential electrical voltage to a low-voltage, and supplying the low-voltage to at least one pair of parallel conductors having multiple decorative lights connected to the co... | 04/18/2006 |
| 6946819 | Device for the correction of the power factor in power supply units with forced switching operating in transition mode A device for the correction of the power factor in power supply units with forced switching operating in transition mode is described. The device comprises a converter and a control device coupled to said converter so as to obtain from an alternating network input v... | 09/20/2005 |
| 6906700 | 3D controller with vibration A hand operated controller or converter structured for allowing hand inputs to be converted or translated into electrical outputs, the controller structured with a plate or platform moveable relative to a base or housing about two mutually perpendicular axes general... | 06/14/2005 |
| 6870355 | Power converter This power converter comprises a plurality of switching elements, an inductor, and a smoothing capacitor. An input current of low frequency from the AC source is intermitted by the switching element turned on and off at high frequency, and an output current to a loa... | 03/22/2005 |
| 6703818 | AC to AC power converter for electronic devices having substantially different output voltage/current characteristics A method for performing power conversion provides a converter output AC waveform from a converter input AC waveform, the convertor input waveform having an input power level, an input frequency, an input waveform shape, and an input voltage/current charac... | 03/09/2004 |
| 6188214 | Phase control switch with reduced heat dissipating RFI inductor A phase control switch with an RFI suppression inductor includes a first winding on the inductor in series with a triac. A first capacitor is in parallel across the series combination of the first winding and triac. The switch further includes a second wi... | 02/13/2001 |
| 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 |
| 6055163 | Communications processor remote host and multiple unit control devices and methods for micropower generation systems A communications processor is disclosed for a power generation system that permits data and control signals to be communicated to and from the power generation system and a host computer. The control signals include a power level command and power factor ... | 04/25/2000 |
| 6037757 | Power control unit having switching phase control for reducing voltage drop at a power supply When the phase control is effected on a supply voltage to a load having positive resistance characteristics with respect to temperatures before a current is allowed to pass, a voltage is supplied for a current passing time T1, and the voltage is supplied ... | 03/14/2000 |
| 5994883 | Alternating current power control device An alternating current power control device for controlling the amount of power energy supplied to an electric load by controlling the cycle numbers of an alternating current power source in a predetermined cycle period is disclosed. The control device in... | 11/30/1999 |
| 5949229 | Power factor correction circuit having an error signal multiplied by a current signal A power factor correction circuit for a boost converter includes a current feedforward loop that senses the input voltage by detecting variations in the rate of change of current in an inductor, thereby eliminating the need for a voltage feedforward loop.... | 09/07/1999 |
| 5867017 | Energy control system with remote switching An energy control system (10) comprises at least one controllable load (110), a master controller (200), a traveler wire (300) and at least one remote switch (400). The master controller (200) transmits control commands that effect corresponding control a... | 02/02/1999 |
| 5847521 | Method and apparatus for driving an electric motor A motor drive method and apparatus for reducing noise of a motor. The motor drive apparatus includes first, second and third half bridge circuits. Each of the first, second and third half bridge circuits includes a first transistor which is adapted to for... | 12/08/1998 |
| 5796245 | Process and device for controlling the power of a load via a phase adjustment system A method for controlling the power supplied to a load (1) which is powered by an AC voltage source U with a period T via a generalised phase adjustment system, includes the steps of periodically delivering a sequence of p elements to the load (1), in acco... | 08/18/1998 |
| 5757176 | Method and system for controlling output current of a large, low-voltage, DC power supply and obtaining diagnostic information from the operation thereof A method and system for controlling the output current of large, low-voltage, DC power supply which includes at least one transformer primary by controllably switching an AC power line voltage to the primary as a function of actual and desired output curr... | 05/26/1998 |
| 5754036 | Energy saving power control system and method Apparatus and methods for AC power regulation for a wide range of complex capacitive and inductive loads which provide substantial reduction in power consumption while also providing a leading power factor. The system is self-adjusting for a wide range of... | 05/19/1998 |
| 5754045 | Power line switching apparatus A semiconductor switching circuit using semiconductor devices includes steep front wave thyristors which are connected in parallel and inverse with each other in their forward directions. An inductor is connected in series between a power source and the s... | 05/19/1998 |
| 5668496 | Circuit arrangement for limiting the current to be switched of an electrical load A circuit arrangement for limiting the current to be switched of an electrical load, with the power input of the electrical load being controlled by means of a Triac, said Triac being connected in series with the electrical load, with a Diac being connect... | 09/16/1997 |
| 5619120 | Low voltage power control A low voltage power control circuit supplies substantially equal voltages to a plurality of loads distributed along a pair of parallel wires. Moreover, the voltage delivered is automatically controlled by a feedback control circuit, so that the number of ... | 04/08/1997 |
| 5617503 | Motor control arrangement, and shaver comprising such a motor control arrangement A motor control arrangement including a control circuit for controlling the speed of an electric motor (EM), which control circuit comprises a measurement resistor (MR) and a switching transistor (ST) having a control electrode and a main current path cou... | 04/01/1997 |
| 5498946 | Device for controlling the variation of the power and/or the speed of a load The invention relates to a device for controlling the variation of the power and/or the speed of a load (2), such as an asynchronous, synchronous, universal motor, a transformer, an inductance, a condenser or a resistor, comprising a switch (5) placed on ... | 03/12/1996 |
| 5477111 | Triac drive for lighting and for inductive load control A dimmer for use in lighting control in which a triac control circuit in included which allows for control of both incandescent and low voltage lighting systems at low and high intensities 142,144. The triac control circuit includes a microcontroller 130 ... | 12/19/1995 |
| 5455491 | Power saving circuitry Power saving circuitry is provided for use with fluorescent lights, inductive loads and resistive loads. The circuitry comprises a power circuit connectable to an alternating circuit power supply and a control circuit. The power circuit includes a bilater... | 10/03/1995 |
| 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 |
| 5373224 | Method and apparatus for varying the power in a load connected to the mains A method for regulating the power in a load connected to the mains through a controlled switch and a device for implementing the method. The method includes the following steps: detecting a mains synchronization pulse, which determines the start of a cycl... | 12/13/1994 |
