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Patent Searching and Data


Matches 551 - 600 out of 2,635

Document Document Title
WO/1995/021514A1
A regulated power supply unit with an "electronic transformer" having an input for a transformer power supply voltage on the primary side, an output for an operating a.c. voltage with a higher-frequency component on the secondary side an...  
WO/1995/017707A1
Current stabilisers are for example required in airport navigation lights and have set value determining units and real value sensing units, as well as real value/set value comparing units. In the described current stabiliser with step-u...  
WO1995010928A3  
WO/1995/012157A1
A switchmode AC power controller for controlling the current through a load (70) such as a large lamp array connected to an alternating current source. The controller contains an AC solid state switch (20), a synchro-flywheel (30), an ou...  
WO/1995/012106A1
A method (10) and system (120) for designing a lighting installation. The system includes a processor (126) for executing the method, which includes generating (12) lighting area input data signals based on selected parameters (14) assoc...  
WO/1995/010928A2
A lighting control system including a switching means connected between an AC power source and any of a plurality of different types of light sources. The switching means is operable in either an ON or OFF state to selectively apply powe...  
WO/1995/003681A1
In order to feed a resistive, inductive or capacitive load, spike pulse strings are used whose spike pulses have less than 1 millisecond duration. The efficiency may thus be considerably increased by pulse amplitudes which are a multiple...  
WO/1995/002231A1
A switch system and for remotely controlled electrical breakers comprising a transmitter (10) and a number of separate receivers (12) which are connected to associated electrical switches. The receivers (12) are controlled by an infrared...  
WO/1994/027419A1
A system and method for reducing installation costs of gas discharge lighting provides a central AC-DC power converter (302) which is connected into an AC lighting circuit and thereafter transmits DC power through the power distribution ...  
WO/1994/021095A1
An illumination level control device (10) is disclosed which sequentially reduces the illumination level of a multi-bulb lamp (12). The illumination level control device (10) incorporates two D flip-flops (38, 40) configured in a master-...  
WO/1994/020973A1
An incandescent lamp bulb (70) which is driven by an electronic control module (ECM) (28) and method of manufacture includes an inductor (72) having a magnetic element and a winding thereon disposed within the lamp bulb (70). The inducto...  
WO/1994/019918A1
A system for supplying at least one electrical apparatus provides touch control and can be used in particular in home automation for supplying electrical equipment such as light bulbs, strip lights, electrical power points, motors, etc.,...  
WO/1994/015349A1
A compact mechanically controlled device which alters an electric current to gradually change the illuminary output of a lamp (20). The device has a mechanical timer (13) having an arc of approximately 270 degrees and an output shaft (18...  
WO/1994/012006A1
A plug-in dimmer module (13) for providing controlled power to one or more lighting fixtures or groups of fixtures. The dimmer module (13) includes a housing (23) with one or more circuit breakers (25a, 25b) located at one end, a power d...  
WO/1994/006258A1
In a free-running inverter for a load, especially a low-voltage lamp, with a bridge rectifier circuit (2-5) which provides a rectified a.c. voltage to two output terminals (a1, a2), a series circuit comprising two controllable switches (...  
WO/1994/006257A1
A free-running inverter for a load, especially a low-voltage lamp, with a series circuit of two controllable switches (10, 11) which interconnects both inputs of the inverter connected to a rectified a.c. voltage, a control voltage havin...  
WO/1994/001911A1
Series circuit of a number of electric current consumption units (2) connected in series, such as lamps for example, or groups of such units, each consumption unit having a by-pass circuit, which will be activated and divert the current ...  
WO/1994/000963A1
A power reducer (10) comprising an adaptor (11) and a reducer circuit (12) for coupling between an incandescent globe (13) and a socket (14). The power reducer (10) reducing the voltage of operation and/or the in-rush current experienced...  
WO/1994/000965A1
An electronic dimmer, for controlling electric lamps, has a microprocessor (10) which controls the firing angle of a pair of back to back SCRs (66, 68). These supply a chopped AC signal to the lamps to be controlled. The current supplied...  
WO/1994/000964A1
A dimmer array comprises a plurality of dimmers (2), each of which includes at least one component, such as a thyristor, which generates heat. A support unit (4) defines an upwardly extending air duct (11) and removably supports the dimm...  
WO/1993/022826A1
The present invention relates to an electronic power regulator for regulating the AC power being fed into a load (3). The power regulator comprises a switching unit (1) and a control unit (2). The switching unit is connected in series wi...  
WO/1993/020671A1
A lighting control device (10) for controlling electric power applied to a lamp (20) to control the lamp intensity. Such device comprises (i) a control switch (T) having a manually-manipulatable switch actuator (16) for controlling the c...  
WO/1993/019351A1
The invention relates to a device for generating radiation, which device comprises an electrically operated radiation source (1), a cap-like reflector means (9), which reflector means (9) is positioned round the radiation source (1). The...  
WO/1993/012515A1
The invention concerns a photoconductor for use in displays, the photoconductor being disposed as a light-collector film in front of or behind the display to measure the ambient light and, at the same time, the light produced by the disp...  
WO/1993/010591A1
The invention relates to an intelligent lamp or an intelligent contact terminal for a lamp, which can be used in a lighting system comprising a plurality of individually controlled lamps (1; 5) linked in a common power-supply circuit (8,...  
WO/1993/006700A1
A dimming control circuit for a plurality of lighting fixtures includes a separate semiconductor power switch, e.g., a silicon-controlled rectifier or SCR, for providing controlled amounts of pulsed, unidirectional electrical current to ...  
WO/1993/002534A1
The invention relates to a device for blanking individual half-waves or groups thereof of an a.c. power supply for powering incandescent electric lamps and other users while particularly taking into consideration the possible electromigr...  
WO/1993/001575A1
A system (10) and method for appliance control, including a controller (12) operatively connected to both an appliance motor (14) and lamp (24) thereof, for controlling its speed and direction of rotation, and brightness, respectively, i...  
WO/1993/000783A1
A series resistor (RV) is fitted in series with an incandescent lamp (GL1) and a switching transistor (T) is connected in parallel to the former and is controlled via an ignition transistor (TZ) which is fed on the input side with the vo...  
WO/1992/015052A1
A phase-controlled power modulation system (100) switches modes in response to circuit-threatening conditions to avert the necessity of a shutdown. Normal operation is in reverse phase control (RPC) mode. When an inductive load sensor (5...  
WO/1992/004757A1
An energy saving device for running a first electrical load from a low voltage/high current source and also one or more additional electrical loads from the low voltage/high current source, said device including n transformers, where n i...  
WO/1992/003897A1
A transformer unit (1) for a suspended ceiling has a cup-shaped housing in the base of which are formed two grooves (3, 4). These grooves correspond to longitudinal members (6, 7) of the ceiling frame and enable the transformer to be mou...  
WO/1992/001968A1
A multi-mode remote control system (10) that allows an electrical load (50) such as a lamp, a fan, or the like to be operated and controlled remotely from different locations. Four distinct and independently operated system control means...  
WO/1991/018487A1
A dual regulator circuit, particularly a light dimmer circuit, for controlling the brightness of filament lamps such as halogen lamps. It is characterized in that it consists of a low-power circuit and a medium-power circuit controlled v...  
WO/1991/011896A1
A circuit arrangement has at least one light-emitting source (8) and a generator (7) which supplies the energy required to operate the circuit arrangement. The light source (8) is a light diode which has a luminous intensity of at least ...  
WO/1991/009459A1
Display board, in particular an illuminated advertisement member, provided with at least two light bulbs branched in parallel, which are connected to a low power output formed by a secondary winding of a transformer (52), which is part o...  
WO/1991/006078A1
A device includes a flashing safety warning light in which a superluminescent light-emitting diode light source (SLD1-SLDn) is driven by power driver (PD) supplied by a high frequency oscillator (HFO) with an oscillatory drive signal at ...  
WO/1991/006047A1
A method and circuit for reverse phase control of alternating current (12) being delivered to a load (3) are disclosed wherein voltage-controlled semiconductor switches (1A, 1B), such as MOSFET's and IGBT's are used as electronic switche...  
WO/1991/004648A1
To compensate the capacitive effect of the secondary-side connection (12, 13) of a low-voltage lamp (14) on the switching behaviour of a lamp control circuit to switch and dim it, the proposal is for a compensation circuit with a first c...  
WO/1991/004647A1
A field lighting installation includes a plurality of series connected light fittings, supplied from an A.C. mains via a converter unit, which is adapted to convert the substantially constant voltage obtained from the mains to a substant...  
WO/1991/003684A1
A dimmer assembly for a portable lamp comprising a plurality of detachably interconnected modules. In a particular form the number of modules is four comprising an upper socket module comprising socket collar (1/2) and socket (3/4a, 4b);...  
WO/1991/002441A1
The invention relates to a process and a circuit arrangement for adapting the light intensity of the summation light (E�i?) of a room lit by internal light (E�k?) and external light (E�i?') to the external light (E�a?), which var...  
WO/1990/013879A1
A location marker (10) is disclosed comprising a casing (11), a switch assembly (30) and a lens (50) enclosing a flashable strobe lamp (12). The location maker is powered by batteries (15) and an electronic circuit (60) converts the batt...  
WO/1990/008399A1
In a method of dimensioning and operating by A.C. or D.C. at a predetermined external heater power a low pressure discharge lamp, particularly a fluorescent lamp having two electrodes between which the discharge is formed, at least one o...  
WO/1990/008450A1
An electric sparkler can imitate the lighting effects of a known ignitable sparkler. This electric sparkler is characterized by the fact that low-voltage incandescent lamps (18-21) and a pulse generator (23) are housed in a transparent s...  
WO/1990/007855A1
A circuit and a method for controlling the dimming of incandescent lights using a pair of antiparallel connected SCRs (16, 78) which are fired at the same frequency as the frequency of the AC line power to achieve phase control of the po...  
WO/1990/005948A1
L'invention concerne une unit� de commande (21, 21A) utilis�e dans la ou les lignes (25, 25A) reliant le panneau d'�clairage (22) aux dispositifs d'�clairage � lampes (22, 22A). L'unit� (21) de commande d'�clairage est � ...  
WO/1990/002473A1
A programmable light switch (24) allows a consumer to be switched on and off, in particular while retaining its basic function as a manually operated switch. For this purpose, it has an electronic component which exploits the voltage ava...  
WO/1990/002472A1
A compact, three-way consumer electrical power switch built into a body (10) designed to fit into and to be interchangeable with existing consumer switch mechanisms, the switch has a button (10a) mounted on a pivot (11) connected to the ...  
WO/1990/001247A1
A regulated AC controller (16) wherein power to a lamp (10) is monitored and compared to a predetemined level (12) to generate a control signal representative of the difference, which control signal is used to reset the power level to th...  

Matches 551 - 600 out of 2,635