Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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 |
| 8044592 | Lamp heat dissipating structure A heat dissipating structure for a lamp includes at least an illuminating element, a lamp base, a metal housing, a ring-shaped coil and a metal base. The metal housing has a great heat conducting capability, and the illuminating element is mounted on the lamp base, ... | 10/25/2011 |
| 7352134 | Lamp containing fixed reverse phase switching power supply with time-based phase pulse triggering control A lamp contains a lamp voltage conversion circuit within the lamp and connected to a lamp terminal. The voltage conversion circuit includes a phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control cli... | 04/01/2008 |
| 7342359 | Forward/reverse hybrid switching power supply with time-based pulse triggering control A phase-control power controller that converts a line voltage to an RMS load voltage includes a fixed phase forward/reverse hybrid phase-control clipping circuit that performs phase-control clipping of a load voltage to provide an RMS load voltage. A conduction angl... | 03/11/2008 |
| 7332981 | Impedance matching apparatus for a plasma chamber comprising two separate storage units and three separate calculators An impedance matching apparatus 3 calculates a forward wave voltage Vfo and a reflected wave voltage Vro at an output terminal 3b, based on a forward wave voltage Vfi and a reflected wave voltage Vri at an input terminal 3a, on inf... | 02/19/2008 |
| 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 |
| 7274149 | Lamp with integral pulse width modulated voltage control circuit A lamp has a voltage controller that converts a line voltage to an RMS load voltage suitable for operation of the lamp's light emitting element, where the voltage controller is entirely within a lamp base and uses pulse width modulation to define the RMS load voltag... | 09/25/2007 |
| 7256548 | Electric circuit for igniting a discharge lamp, and electric component module and discharge lamp incorporating such an electric circuit An electric circuit for igniting a discharge lamp includes a voltage source, and at least one condenser electrically connected to the voltage source. Further, a series chain is provided, electrically connected in parallel with the condenser, of at least one ignition... | 08/14/2007 |
| 7250726 | Systems and methods for a transformer configuration with a tree topology for current balancing in gas discharge lamps An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, efficient, and good performing. Embodiments ... | 07/31/2007 |
| 7224130 | Method of operating a lamp containing a fixed phase power controller A method of operating a lamp that has a power controller connected between a terminal and a light emitting element that converts the line voltage to an RMS load voltage. An input to an analog control block is provided in the controller that is independent of a chang... | 05/29/2007 |
| 7224151 | Fixed phase power controller with analog trigger A fixed phase power controller that converts a line voltage to an RMS load voltage includes an analog control block with a capacitor that receives an input that is independent of a change in magnitude of the line voltage and that charges and discharges to provide a ... | 05/29/2007 |
| 7218054 | Lamp having fixed phase power controller with analog trigger A lamp which includes a fixed phase power controller connected between a terminal and a light emitting element converts line voltage to an RMS load voltage. The controller has an analog control block that receives an input that is independent of a change in magnitud... | 05/15/2007 |
| 7211964 | Lamp including 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... | 05/01/2007 |
| 7208879 | Lighting apparatus for discharge lamp An embodiment of a discharge lamp lighting apparatus of the present invention includes a socket inserted with a discharge bulb, a transformer having a coil including a secondary side winding connected at one end to the socket, connected at the other end to a first d... | 04/24/2007 |
| 7199678 | Impedance matching apparatus for a plasma chamber comprising two separate storage units and calculators An impedance matching apparatus 3 calculates a forward wave voltage Vfo and a reflected wave voltage Vro at an output terminal 3b, based on a forward wave voltage Vfi and a reflected wave voltage Vri at an input terminal 3a, on inf... | 04/03/2007 |
| 7199532 | Lamp containing phase-control power controller with analog RMS load voltage regulation A lamp includes a phase-control power controller within the lamp. The phase-control power controller includes an analog load voltage sensor that provides an optical output related to an RMS load voltage and a phase-controlled dimming circuit that has a comparison ci... | 04/03/2007 |
| 7196480 | Method of soft-starting a switching power supply containing phase-control clipping 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 conduction angle of a phase-control clipping circuit is gradually increased to a steady state value that defines the RMS load voltage. The c... | 03/27/2007 |
| 7170231 | Lamp that sets desired RMS load voltage with variable pulse width modulation A lamp includes a voltage controller that converts a line voltage to a desired RMS load voltage. The voltage controller is entirely within a lamp base and uses pulse width modulation to define the RMS load voltage. The voltage controller has a feed-back circuit that... | 01/30/2007 |
| 7170236 | Method of setting desired RMS load voltage in a lamp A method of converting a line voltage to a desired RMS load voltage in a lamp includes the steps of pulse width modulating a load voltage with a pulse width modulation circuit, triggering conduction in the pulse width modulation circuit independently of a line volta... | 01/30/2007 |
| 7166964 | Lamp containing pulse width modulated voltage conversion circuit A lamp includes a voltage conversion circuit entirely within a lamp base. The voltage conversion circuit includes a pulse width modulator for modulating a lamp load voltage and provides a load voltage to a light emitting element. A feed-back circuit adjusts the puls... | 01/23/2007 |
| 7135822 | Transformer, lamp base having a transformer and high-pressure discharge lamp A transformer for being fitted in a lamp base and to a lamp base having a transformer arranged in it, the transformer housing being provided with guide elements which serve the purpose of inserting the transformer in the correct position in the lamp base. The transf... | 11/14/2006 |
| 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 |
| 7095177 | EL light emitting unit, power feeding unit and EL light emitting device EL light emitting device includes a cylindrical EL light emitting unit and a columnar power feeding unit. EL light emitting unit is composed such that a cylindrical receiver coil is arranged and connected along an inner circumferential face of the cylindrical EL lig... | 08/22/2006 |
| 7061183 | Zigzag topology for balancing current among paralleled gas discharge lamps An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, and efficient. Embodiments include configura... | 06/13/2006 |
| 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 |
| 7049750 | Lamp having integral voltage controller A lamp includes a voltage conversion circuit that converts a line voltage to a desired RMS load voltage. The voltage conversion circuit is entirely within a lamp base and uses pulse width modulation to define the RMS load voltage. The voltage conversion circuit incl... | 05/23/2006 |
| 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 |
| 7042169 | Gas discharge lamp base comprising an ignition device A description is given of a gas-discharge lamp base (11) with a housing comprising an upper part (10) and a cover (40), a support (16) accommodated in the housing for receiving the components, with a transformer, with inductances connecte... | 05/09/2006 |
| 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 |
| 7034473 | Phase-control power controller for converting a line voltage to an RMS load voltage A phase-control power controller that converts a line voltage to an RMS load voltage includes a phase-control circuit connected to the line and load terminals and having an RC network that clips the load voltage. A load sensing circuit is connected across the load t... | 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 |
| 6919687 | High-voltage discharge lamp lighting apparatus, high-voltage discharge lamp apparatus, and floodlight projector apparatus A high-voltage discharge lamp lighting apparatus has a stabilizer which supplies a power voltage used for maintaining the lighting operation to a high-voltage discharge lamp, and an ignitor circuit having an oscillating circuit-for-driving in which a start pulse gen... | 07/19/2005 |
| 6911777 | Clamp-on low power isolation transformer for airfield lighting A clamp-on isolation transformer for an airfield lighting fixture in an airfield lighting system includes a first portion configured to receive a portion of a primary conductor of a primary current loop and a second portion configured to receive another portion of t... | 06/28/2005 |
| 6856094 | Electrical switch utilizing ball for lamps and like appliances A low voltage lamp is disclosed and claimed. The low voltage lamp includes a low voltage lamp switch having a first pole permanently connected to a remote source of electric power; a second pole permanently connected to a light; and a movable switch element permanen... | 02/15/2005 |
| 6856095 | High frequency heating device This invention provides a magnetron high frequency device which includes: a filtering inductor coupled to a positive end of a direct current power supply; a central tap transformer having a central tap end, a first end and a second end; a filtering capacitor; a firs... | 02/15/2005 |
| 6580228 | Flexible substrate mounted solid-state light sources for use in line current lamp sockets A lamp using solid-state light emitting sources is configured to be used in a conventional socket. The lamp includes a flexible substrate on which are mounted a plurality of light emitting sources, such as light emitting diodes (LEDs) in spaced-apart arra... | 06/17/2003 |
| 6462475 | Power saving environment protection bulb A power saving environment protection bulb comprises a cover disk having a plurality of ring portions formed therein; at a lower sides of the holes near the bottom of the cover disk being installed with tapered tracks; edges of the bottom of the cover dis... | 10/08/2002 |
| 6380695 | Driving device for fluorescent tube A driving device for a fluorescent tube has a high frequency oscillator which outputs a high frequency AC signal. A pulse width modulator is connected to the high frequency oscillator for outputting a PWM harmonic frequency signal. A first power switch is... | 04/30/2002 |
| 6366023 | Starter modules for motor vehicle headlight discharge lamps A starter module for a discharge lamp, especially for a motor vehicle, includes a high tension transformer which has a magnetic circuit component such as an annular core, on which a primary winding (1b) and a secondary winding are wound. The transformer f... | 04/02/2002 |
| 6362570 | High frequency ferrite-free electrodeless flourescent lamp with axially uniform plasma An electrodeless fluorescent lamp employs a glass envelope made from a single linear tube filled with inert gas and mercury vapor. Phosphor and protective coatings are disposed on the inner surface of the envelope walls. An induction coil of few turns mad... | 03/26/2002 |
