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| Number | Title | Issue Date |
| 7342360 | Flashlight A handheld flashlight includes a head that pivots relative to a body. Three legs pivotally connect to the body and open into a tripod to support the head in an elevated position. The legs are spring-biased toward the open tripod position and are selectively held clo... | 03/11/2008 |
| 7282865 | Device and method for operating a discharge lamp The invention relates to a device for operating a high-pressure discharge lamp, comprising: a switched-mode power supply circuit for supplying power to the high-pressure discharge lamp from a supply voltage, the power supply circuit comprising at least one power swi... | 10/16/2007 |
| 7215084 | Power control arrangement, as for a flashlight In a battery-operated apparatus comprising a load, a battery and a switch in circuit for selectively energizing the load: a comparator compares a potential produced by the battery and a reference potential for de-energizing the load when the battery potential is bel... | 05/08/2007 |
| 7196482 | PWM controller with automatic low battery power reduction circuit and lighting device incorporating the controller A controller for controlling a voltage applied to a load from a power source includes a square wave producing circuit for connection in the circuit with the battery and the lamp. The square wave producing circuit produces a variable duty cycle square wave for contro... | 03/27/2007 |
| 7163312 | Spotlight system and method A spotlight system is adaptable for use with preferably one or more power sources so as to provide lighting where needed. The spotlight system preferably includes a spotlight assembly comprising a lamp housing which includes at least one bulb, a switch, and an enclo... | 01/16/2007 |
| 7045964 | Emergency lighting system with automatic diagnostic test An emergency lighting system powers all the luminaires of a lighting system during normal use, and switches from utility power to an emergency power source to drive some of the luminaires during a power outage. The typical on/off wall switch control for regular use ... | 05/16/2006 |
| 6718213 | Variable base load energy management system and method The present invention is a system and method for variable base load demand-side energy management. The system of the present invention includes a power reduction device receiving electrical power from an electrical power source and outputting electrical power to a l... | 04/06/2004 |
| 6717367 | Emergency lighting arrangement and apparatus An emergency lighting arrangement and an emergency lighting apparatus, the arrangement being configured to be coupled to a supply network and the arrangement comprising an electronic ballast for igniting and burning a fluorescent lamp, the emergency lighting apparat... | 04/06/2004 |
| 6609804 | LED interior light fixture A low voltage ceiling or wall mounted light fixture for residential and commercial lighting includes a plurality of high lumen white LED lights incorporated within the fixtures, a light color diffusion panel and a household current to low voltage DC conve... | 08/26/2003 |
| 6215249 | Fluorescent lamp assembly A fluorescent lamp assembly is adapted for connection with a power source, and includes a plurality of sets of fluorescent lamps, a plurality of control units and a main power switch. Each of the sets of fluorescent lamps has a lamp seat for holding the f... | 04/10/2001 |
| 6107744 | Back-up electrical systems A back-up power system which can accommodate a standard electrical device that is operable from an alternating current power source when alternating current is available, but is operable by a direct-current to direct-current converter when alternating cur... | 08/22/2000 |
| 5834884 | Systematic configuration of compact fluorescent lamps for operation in a single-type ballast A systematic configuration of compact fluorescent lamps of different power levels determines the operating parameters for normal operation of each respective lamp in a single-type ballast.... | 11/10/1998 |
| 5734230 | Fail-safe lighting system with load shedding and dimming A fail-safe lighting system which includes provision for setting priorities or sequences of operation for different lights or sets of lights. When normal power is interrupted, all or a selected number of lights remain lit and/or are dimmed, thus providing... | 03/31/1998 |
| 5015919 | Emergency lighting system provided with a fluorescent tube An emergency lighting system provided with a U-shaped fluorescent tube having power supplied by a square wave oscillator connected to a relatively small sized battery. A battery charger is employed to charge the battery when the standard AC source is conn... | 05/14/1991 |
| 4985662 | Low voltage lamp switcher circuit An improved lamp switching circuit for switching on a second lamp circuit upon every alternate application of power to a first lamp circuit. A magnetic latching relay alternately connects and disconnects the second lamp circuit in parallel with the first ... | 01/15/1991 |
| 4985661 | Uninterrupted desk lamp This invention relates to an interrupted desk lamp generally comprised of a main lamp assembly and an auxiliary lamp assembly. The auxiliary lamp assembly is controlled by means of a photoresistor and an AC power failure lighting circuit to automatically ... | 01/15/1991 |
| 4977351 | Emergency lighting system This is an emergency lighting system which permits at least one gas discharge lamp to be operated from an AC power source when AC current is present and from a battery when AC signal is not present. The circuit also provides the capability for turning the... | 12/11/1990 |
| 4918357 | Combination incandescent and solar-electric light bulb with automatic switching device and charging means therefor A dual-filament light bulb with associated adapter apparatus which uses photovoltaic cells mounted within the light bulb to charge a battery which powers one of the filaments. The adapter apparatus is designed to mount in an ordinary light socket which pr... | 04/17/1990 |
| 4862038 | Automatic relamping system An automatic relamping system that provides for operation of a single one of multiple illumination lamps with automatic illumination of a next lamp upon failure of an illuminated lamp. A drive circuit is provided for the multiple lamps including an oscill... | 08/29/1989 |
| 4749908 | Emergency power supply An emergency power supply including an input for connection to a power line, an output for connecting the input to electrical equipment so as to supply power thereto from the power line, a supplemental power supply connected to the output and adapted to s... | 06/07/1988 |
| 4700110 | Lamp switching A second lamp is connected to power terminals upon each alternate switching off of a first lamp so that, upon each alternate switching on of the first lamp, the second lamp is illuminated. A magnetic latching relay switches the second lamp into and out of... | 10/13/1987 |
| 4686424 | Emergency lighting circuits An emergency lighting circuit includes a lamp which can be energized by a battery-inverter circuit upon power failure. The battery is connected to the inverter circuit and the lamp by operation of a relay which is connected to the rectifier supplying char... | 08/11/1987 |
| 4494326 | Electrolumiscent display structure for motor vehicle window In a marking display structure for a motor vehicle window, a means is provided which is arranged to illuminate, from inside, a marking display element so that the marking, which represent the type, model or the like of the motor vehicle, can be recognized... | 01/22/1985 |
| 4463283 | Rechargeable lamp assembly, mounting unit, and circuit therefor A rechargeable lamp assembly utilizing recharging contacts and a mounting unit for recharging purposes that contains mating contacts so that the lamp unit may be recharged when mounted on the mounting unit. The mounting unit includes another set of electr... | 07/31/1984 |
| 4451762 | Control circuit and system for providing emergency lighting A control circuit and system is disclosed for providing emergency lighting from a single source of electrical power which itself is capable of providing input power alternately in the form of a sinusoidal power signal and a square wave power signal during... | 05/29/1984 |
| 4410835 | Utility emergency lamp and solid state switching and battery charging circuit therefor The power/switcher module, bi-filament light bulb, and light bulb socket, of this invention are assembled with standard lamp industry hardware and fittings to provide a lamp fixture with conventional utility increased by the addition of an integrated auto... | 10/18/1983 |
| 4323821 | Luminaire converter A converter circuit for use in changing a series wired primary ballast normally employed for operating a mercury vapor lamp to a more energy-efficient high intensity discharge lamp, such as a high pressure sodium lamp, with the circuitry involved incorpor... | 04/06/1982 |
| 4232252 | Lighting network including a gas discharge lamp and standby lamp A lighting network is described which includes a main gas discharge lamp, a standby lamp and a control circuit. The control circuit senses when the gas discharge lamp is operating normally and turns off the standby lamp. When the discharge lamp is not up ... | 11/04/1980 |
| 4151445 | Instant light lamp control circuit An instant light lamp combining a miniature arc tube and a standby filament in a sealed vitreous envelope is operated by a high frequency power supply combined with a filament control circuit. The power supply comprises transforming means including voltag... | 04/24/1979 |
| 4099095 | Operating circuit for gaseous discharge and incandescent lamps Gaseous discharge lamp is connected to a current sensing transformer which generates a signal when the lamp is on to turn on a triac operating a relay for turning off an auxiliary incandescent lamp which automatically operates when the gaseous discharge l... | 07/04/1978 |
