Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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 |
| 8026672 | Light emitting device A light emitting device is disclosed herein. An embodiment of the light emitting device comprises a first plurality of light emitters comprising a first group and a second group, wherein the first group is connectable in series to the second group. A first driver is... | 09/27/2011 |
| 8004201 | LED circuit A LED circuit is provided. The LED circuit comprises: an inductor, a group of LEDs, a power MOS and a switching circuit. The switching circuit comprises: an error amplifier generating an error output, a PWM, a RC circuit and a control means. The PWM generates a swit... | 08/23/2011 |
| 7443102 | Energy-conserving devices of illumination systems Disclosed is an energy-conserving device for an illumination system. The energy-conserving device is connected between a power supply of and a lighting assembly of the illumination system. The energy-conserving assembly provides a first switch, a ballast, and a comp... | 10/28/2008 |
| 7423387 | Apparatus and method for controlling colour and colour temperature of light generated by a digitally controlled luminaire The present invention provides a method and apparatus for controlling the correlated colour temperature (CCT) or colour of light produced by an array of light-emitting elements by providing multiple selectable paths for the flow of drive current. The apparatus inclu... | 09/09/2008 |
| 7331688 | Synchronous light emitting diode lamp string The present invention provides a light emitting diode lamp, which includes at least a light emitting diode and a control circuit. The light emitting diode lamp has an anode pin, a cathode pin, and a synchronous pin. The anode pin and the cathode pin receive a DC vol... | 02/19/2008 |
| RE39856 | Multicolor LED lamp bulb for underwater pool lights A multicolor LED lamp bulb includes a hollow lamp body which has a substantially tapered intermediate portion, a longitudinal portion and a stem portion, a lens sealingly engaged with the longitudinal portion, a plurality of different colored LED bulbs mounted in a... | 09/25/2007 |
| 7235930 | Decorative tree with coordinated visual and sound effects A decorative tree uses a control circuit to operate multiple light strings and a speaker. Based on different types of music output by the speaker, the control circuit determines the light strings to be properly turned on or off. Therefore, the visual effects generat... | 06/26/2007 |
| 7210819 | Light emitting diodes for high AC voltage operation and general lighting A single-chip integrated LED particularly adapted for direct use with a high voltage AC power comprises a plurality of series-connected LEDs arranged in two arrays. The opposite polarities of the arrays are connected together and then connected to the AC power sourc... | 05/01/2007 |
| 7175302 | Year-round decorative lights with multiple strings of series-coupled bipolar bicolor LEDs for selectable holiday color schemes A decorative lighting apparatus includes a decorative light strand having first, second, and third wires, each with a plurality of lamps coupled in series therealong, and a return wire coupled to ends of the first, the second, and the third wires. Each lamp of the p... | 02/13/2007 |
| 7165876 | Illuminating device utilizing light-emitting diode array A nightlight including a light bank having light-emitting diodes (LEDs) disposed in an array. The amount of light emitted from the light bank can be varied by engaging a switch that selects between a number of electrical pathways. The device includes a photosensitiv... | 01/23/2007 |
| 7138770 | LED driving circuit An LED driving circuit that is directly activated by an AC power supply is disclosed. A driving circuit has a first and second pair of opposite branches. The first pair of opposite branches operates in a positive half cycle of the AC power supply and the second pair... | 11/21/2006 |
| 7026768 | Apparatus flashing lights in sequences indicating directions of movement in response to detected fire conditions and in response to an electrical power failure A direction-indicating device includes a control unit, which is plugged into an external power source, and a number of interconnected lights, extending in a first direction. When the external power source fails, the lights are flashed, using power from a battery in ... | 04/11/2006 |
| 6641294 | Vehicle lighting assembly with stepped dimming A lighting assembly for illuminating a vehicle interior has an elongated housing which supports a printed circuit board that has an electrically conductive pattern. A plurality of electrical terminals are connected to the electrically conductive pattern f... | 11/04/2003 |
| 6628252 | LED drive circuit An LED drive circuit includes a booster circuit having a first and second capacitors and using a n/m voltage type rectifying switching and a constant current circuit having a MOS transistor as an output transistor. The constant current circuit is connecte... | 09/30/2003 |
| 6616291 | Underwater lighting assembly The present invention provides an under water lighting assembly including a housing and a plurality of LEDs mounted on a board within the housing. The LEDs are arranged in a plurality of banks such that are powered respectively. The banks are circular and... | 09/09/2003 |
| 6577072 | Power supply and LED lamp device An LED lamp device of the invention includes a power supply unit (102, 103) supplied with an alternating-current power supply voltage, and an LED lamp (106) constituted by one or a plurality of serially connected LEDs connected to output terminals of the ... | 06/10/2003 |
| 6512332 | Laser pump energy conservation A photon pump for a laser with a switch added to prevent capacitor discharge after the laser reaches maximum florescence.... | 01/28/2003 |
| 6507154 | Circuit for operating warning lights The present invention pertains to an electrical circuit for operating warning lights that are commonly used on emergency and service vehicles. The electric circuit enables the use of pairs of 21 volt DC halogen lamps on a light bar installed on an emergen... | 01/14/2003 |
| 6392359 | System and method for reducing wavelength variations between light emitting diodes A system and method for reducing wavelength variations between light emitting diodes (LEDs) is provided that determines an emission wavelength of each of a plurality of LEDs at a common drive current, and drives each of the plurality of LEDs with a respec... | 05/21/2002 |
| 6392358 | Liquid crystal display backlighting circuit The present invention is a system and method for directing the flow of current supplied for a collection of light emitting diodes to provide for rapid flashing of the light emitting diodes and a wide dimming range. A fixed amount of current may be availab... | 05/21/2002 |
| 6344716 | Christmas light string An electrical circuit for use with plural, low voltage loads such as a string of Christmas lights is disclosed comprising groups of lights placed electrically in a series circuit but the lights within each group are in parallel, preferably with a semicond... | 02/05/2002 |
| 6268702 | Lamp for an external warning light A LED lamp has a tubular metal body 1 having bayonet fitting lugs 2 and a central insulated contact 3 at its base. The top 4 of the body is angled and has a small metal plate 5 set in potting compound 6 arranged flush with the angled top 4. The plate 5 ha... | 07/31/2001 |
| 6218786 | Lamp string controlling device A lamp string controlling device includes a power supply circuit constituted by a transformer and a rectification circuit for converting an alternate current into a direct current. A harmonic oscillation circuit is connected between the transformer and th... | 04/17/2001 |
| 6184628 | Multicolor led lamp bulb for underwater pool lights A multicolor LED lamp bulb includes a hollow lamp body which has a substantially tapered intermediate portion, a longitudinal portion and a stem portion, a lens sealingly engaged with the longitudinal portion, a plurality of different colored LED bulbs mo... | 02/06/2001 |
| 6011329 | Electrical circuit cycling controller A time delay power controller has a power input for receiving alternating electrical power from an external source; a timer activation device connected in parallel to a one or more timers, each timer having an associated delay time and an output for deliv... | 01/04/2000 |
| 5214355 | Instant-start electronic ballast A half-bridge inverter is powered from a constant-magnitude DC supply voltage and provides at the inverter's output a first AC output voltage that is describable as a modified squarewave voltage. This first AC voltage is applied across a series-combinatio... | 05/25/1993 |
| 5017834 | Simplified gaseous discharge device simmering circuit A high voltage active device such as a power FET is employed in a circuit configuration which maximizes the terminal impedance. This high impedance is placed in series with the gaseous discharge device to be driven. The gaseous discharge device is able to... | 05/21/1991 |
| 4950958 | Elongated, bendable lamp An elongated, bendable lamp is disclosed having at one of the ends a conventional lamp control switch. By means of the control exerted by the lamp control switch, a series of lamp operations, such as the unified switching on or off, twinkling, or a slow o... | 08/21/1990 |
| 4751432 | High-pressure discharge lamp The invention relates to a high-pressure discharge lamp comprising an outer bulb accommodating a first and a second discharge vessel, these discharge vessels being connected electrically in series. According to the invention, the second discharge vessel i... | 06/14/1988 |
| 4293795 | Solid state flasher relay A solid state flasher relay of the type for switching an AC or a DC voltage across first and second loads interconnected at a common junction. More specifically, a solid state flasher relay is disclosed wherein shunting transistors are selectively control... | 10/06/1981 |
| 4258295 | Timed ballast circuit for sodium vapor lamp A ballast circuit for driving a sodium vapor lamp includes a ballast transformer having a primary winding connected to a constant current power source. A secondary winding of the transformer is connected across the lamp. A high voltage oscillator responsi... | 03/24/1981 |
| 4155015 | Light switch The specification discloses a switching system for operating an incandescent lamp from a plurality of stations. The controlling switch at each station is wired in series with the lamp, and other control switches to form a single series circuit. Actuation ... | 05/15/1979 |
