Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7315130 | Switching control for inverter startup and shutdown An electronic ballast circuit for a lamp is described, wherein the ballast comprises a power factor correction circuit coupled to an inverter circuit. The inverter circuit is further coupled to a trigger circuit, which is in turn operatively connected to a hot or ne... | 01/01/2008 |
| 6744220 | Free-running circuit arrangement A free-running circuit arrangement for operating a load, has at least one switching element, a freewheeling diode connected in an anti-parallel fashion relative to the main current direction of the at least one switching element, a load circuit and a control resonan... | 06/01/2004 |
| 6593704 | Method and ballast for feeding a UV light low pressure radiator The invention relates to a method and a ballast for feeding a UV light low pressure radiator. The UV light low pressure radiator is ignited and subsequently fed with direct current. The polarity of the direct current is changed at successive intervals whi... | 07/15/2003 |
| 5565740 | Electronic ballast for hot cathode discharge lamps An electronic ballast for hot cathode discharge lamp comprises a DC voltage source, a chopper, and an inverter. The chopper includes a switching element connected in series with an inductor across the DC voltage and driven to turn on and off for providing... | 10/15/1996 |
| 5387847 | Passive power factor ballast circuit for the gas discharge lamps A ballast for a gas discharge lamp circuit has a d-c output which contains three series-connected diodes connected across the output terminals, a pair of capacitors connected from different respective nodes of the diodes to respective ones of the output t... | 02/07/1995 |
| 5349270 | Transformerless fluorescent lamp operating circuit, particularly for a compact fluorescent lamp, with phase-shifted inverter control To eliminate the necessity for a saturated or air gap inductance to provide feedback circuit for a self-exciting oscillator including two active electronic switches (T1, T2) , for example MOSFETs, an auxiliary winding (HW1, HW2, . . . HW11) is inductively... | 09/20/1994 |
| 5083062 | Flash device The present invention concerns with the flash device in which the output of an electric power source is boosted by a DC-DC converter, and a main capacitor is charged by the output of the DC-DC converter. In the above-described flash device, to detect the ... | 01/21/1992 |
| 4845408 | Compact fluorescent lamp assembly A fluorescent lamp assembly for operation from a source of AC line voltage. The assembly includes a fluorescent lamp having an arc length not greater than about 120 mm and an envelope which includes at least one constricting portion located therein for co... | 07/04/1989 |
| 4777410 | Ballast striker circuit A striker circuit is provided for high intensity discharge lamps that uses a clamping circuit applied to the AC line current to generate a clamped voltage differential for striking the lamp. A clamped voltage differential is generated at fixed intervals u... | 10/11/1988 |
| 4335297 | Electron beam processor An electron beam processor with an energy storage line and matched field emission diode that define a high energy electron beam generator. A transport system positions a specimen to be thermally processed in a processing station. Energy stored on the line... | 06/15/1982 |
| 4040000 | Solid state high energy electrical switch for under-sea-water electric discharge seismic generator An under-sea-water electric discharge generator includes a source of stored electrical energy connectable through solid state switch means to a cable extending to a number of pairs of electrodes to be towed under sea-water. The switch means comprises an i... | 08/02/1977 |
| 3986144 | Oscillator with blinking light emitting diode for ornamental ring An ornamental ring having a flashing capacity controlled by a minute electrical circuit incorporating one or more light-emitting diodes which are confined in the gem-display region of the ring, is disclosed. A time delay, capacitor-resistor arrangement go... | 10/12/1976 |
