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| Number | Title | Issue Date |
| 7441923 | Operating room light fixture and handle with control element An operating room light fixture with a light fixture housing, in which at least one lighting unit with at least one light source is arranged, with a handle, which is arranged on a side of the light fixture housing facing the operating area, wherein the handle compri... | 10/28/2008 |
| 7401944 | Operating room light fixture having two light sources and a control unit An operating room light fixture having a first lighting unit including a first light source and an external reflector, a second lighting unit including a second light source and an internal reflector, and a control unit. The second lighting unit is positioned in fro... | 07/22/2008 |
| 7388337 | Fluorescent lamp lighting apparatus and lighting control system A fluorescent lamp lighting apparatus according to the present invention comprises an initial illuminance correction control circuit which sets a fluorescent lamp to an initial illuminance correction control lighting mode, a switching portion which changes the fluor... | 06/17/2008 |
| 7371963 | Photovoltaic power generation system An object of the present invention is to provide a photovoltaic power generation system which is capable of achieving system linkage of a plurality of solar cell strings having different output voltages to a commercial electric power system with ease, and which enab... | 05/13/2008 |
| 7288902 | Color variations in a dimmable lighting device with stable color temperature light sources A method and system allow a lighting device having light sources with multiple color temperatures to vary a color temperature of the lighting device in response to changing dimming levels. The light sources are non-incandescent light sources, such as light emitting ... | 10/30/2007 |
| 7120035 | Inverter controller An integrated circuit inverter controller that includes at least one input pin that is configured to receive two or more input signals. The input pin may be multiplexed so that the appropriate input signal is directed to appropriate circuitry within the controller t... | 10/10/2006 |
| 7102902 | Dimmer circuit for LED The AC output from a source is rectified and applied to a resistor/Zener diode circuit connection which determines the magnitude of the rectified voltage applied via a circuit to a first MOSFET device. The inverted output of the first MOSFET device is applied to the... | 09/05/2006 |
| 6982858 | Electronic power-saving power control circuit An electronic power-saving power control circuit for connection between a single-phase power supply and a lighting fixture to control the output of power supply to the lighting fixture is disclosed to include a CPU (central processing unit), a power voltage detector... | 01/03/2006 |
| 6975078 | Dimming-control lighting apparatus for incandescent electric lamp A dimming-control lighting apparatus for an incandescent electric lamp with less accompanying color temperature change, using a dimming power source installed in TV studios or theater stages, is disclosed. The voltage of the first filament whose rated voltage is low... | 12/13/2005 |
| 6900993 | Inverter controller An integrated circuit inverter controller that includes at least one input pin that is configured to receive two or more input signals. The input pin may be multiplexed so that the appropriate input signal is directed to appropriate circuitry within the controller t... | 05/31/2005 |
| 6856519 | Inverter controller An integrated circuit inverter controller that includes at least one input pin that is configured to receive two or more input signals. The input pin may be multiplexed so that the appropriate input signal is directed to appropriate circuitry within the controller t... | 02/15/2005 |
| 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 |
| 6469457 | Power and data distribution in lighting systems Improvements to lighting systems, especially for entertainment and architectural applications are disclosed, including apparatus that permit a user to readily field-configure power distribution to branch circuits to be dimmed or un-dimmed, single- or mult... | 10/22/2002 |
| 6459250 | Decorative wall plate switch dimmer mechanism A circuit board provides a first elevation adapted for printing and bonding of conductor and resistor traces and monolithic ceramic capacitors, and provides through holes adapted for locating conductors. A second elevation is adapted for location and cont... | 10/01/2002 |
| 6400098 | Compact fluorescent lamp dimmers A dimmer for controlling AC power to a lighting load provides a leading power factor by initiating conduction through an electronic switch at each zero crossing of the line current. The dimmer delivers current to the lighting load in a sequence of pulses ... | 06/04/2002 |
| 6356038 | Microcomputer-controlled AC power switch controller and DC power supply method and apparatus An AC controller which provides programmable switching of AC power flow, together with producing a source of DC power for operating the AC controller. The AC controller is connected in series with only one side of the AC power source and the AC load. The ... | 03/12/2002 |
| 6211627 | Lighting systems Improvements to lighting systems, especially for entertainment and architectural applications are disclosed, including apparatus that permit a user to readily field-configure power distribution to branch circuits to be dimmed or un-dimmed, single- or mult... | 04/03/2001 |
| 6144539 | Arrangement for protecting low-voltage control circuitry from externally applied high voltages, and dimming ballast employing such an arrangement An arrangement for protecting low-voltage control circuitry from externally applied high voltages comprises a voltage source (30) and a current-sourcing circuit (40). Current-sourcing circuit (40) provides current to an external controller (18) in a norma... | 11/07/2000 |
| 6144568 | Circuit arrangement for operating electrical lamps The invention relates to a circuit arrangement for operating electrical lamps which encompasses an invertor (WR) with oscillation build-up circuit (trigger generator), comprising diac (DC1) and drive circuit. The drive circuit comprises a high-pass filter... | 11/07/2000 |
| 6138241 | Apparatus for and method of inhibiting and overriding an electrical control device An apparatus for and method of inhibiting and overriding the normal operating mode of one or more input devices connected to a communications network. The present invention functions within an electrical network made up of a plurality of input devices whe... | 10/24/2000 |
| 6107787 | Automobile dashboard light control Dashboard dimmer light circuit for a vehicle, for example a car or truck. A power supply 10 provides a step-function voltage signal to an op-amp oscillator circuit 20 which provides a triangular voltage oscillation signal to an op-amp level comparator 40 ... | 08/22/2000 |
| 6091238 | Variable output electrical device The present invention incorporates a system for varying the output signal and regulating the power consumed by an electrical device. It achieves its purpose by moving a magnet relative to a Hall effect sensor which is responsive to an intersecting magneti... | 07/18/2000 |
| 6072304 | Circuit and method for triggering a thyristor An improved trigger circuitry for a high side thyristor application having a thyristor connected to an A/C line, a capacitor connected across the A/C line to A/C neutral through impedance, an electronic switch connected from the thyristor to the junction ... | 06/06/2000 |
| 6020659 | Ramping electronic switch system The present invention relates to an electronic switch system for controlling AC power to a load. The switch has ON, OFF and RAMP down modes that can be selected by means of momentary touch switches. When put into the RAMP down mode, the power to the load ... | 02/01/2000 |
| 6005308 | Electrical switch and dimmer control device An electrical switch and dimmer device for controlling current applied to a load comprises a bezel assembly (16) which includes a bezel housing (17), a switch actuator (18) and a dimmer actuator (19). The bezel housing supports both switch and dimmer actu... | 12/21/1999 |
| 5932973 | Multifilament lamp, a method for varying its brightness and control and operating circuit therefor An incandescent lamp has an attachment for connection to a two-wire electrical power line and a bulb containing a radiating element. At least two filaments are housed in the bulb and constitute the radiating element, and circuitry has an input connected t... | 08/03/1999 |
| 5821703 | Data distribution in lighting systems A lighting system made up of a plurality of light fixtures which each produce a light beam, in which each of a plurality of varying devices, each having an input and an output, and each capable of varying at least one parameter of the light beam from at l... | 10/13/1998 |
| 5811963 | Line powered DC power supply A line powered supply for a wall mounted lighting load control system includes a power MOSFET in series with a load control relay and a second MOSFET in parallel with the load control relay. When the lighting load is off, the MOSFET in parallel with the l... | 09/22/1998 |
| 5751116 | Apparatus to retrofit an HID light fixture An apparatus for retrofitting an HID light fixture is described in several embodiments. The apparatus is coupled in series with the secondary winding and the HID lamp of the HID light fixture. A first retrofit capacitor replaces the light fixture capacito... | 05/12/1998 |
| 5731663 | Variable power control lamp adapter A variable power lamp control adapter is provided having a novel, different, and a lower cost construction method than that used in prior art lamp control devices. The circuit construction is achieved by utilization of the Surface Mount Technology discipl... | 03/24/1998 |
| 5712558 | Optically actuated and controlled dimmer type light switch An optically controlled dimmer type device which can be used to regulate the brightness of an incandescent lamp. The device can also be used to control other electrical loads such as a.c. type motors. One of the main characteristic of the device is that i... | 01/27/1998 |
| 5629607 | Initializing controlled transition light dimmers A light dimmer is provided in which semiconductor power devices for each of the polarities of an alternating current supply are coupled between the alternating current supply and a lamp load. In the course of varying average power supplied to the lamp loa... | 05/13/1997 |
| 5619120 | Low voltage power control A low voltage power control circuit supplies substantially equal voltages to a plurality of loads distributed along a pair of parallel wires. Moreover, the voltage delivered is automatically controlled by a feedback control circuit, so that the number of ... | 04/08/1997 |
| 5600233 | Electronic power control circuit An improved method and apparatus for handling the large load currents which occur with overloads, short circuits, and momentary overcurrents such as in starting motors or cold incandescent lamp filaments. The method involves turning the load current off w... | 02/04/1997 |
| 5532557 | Electric light socket constructions Light socket improvements include a thermal conductor which removes heat by inducing a flow of air within the socket and/or which acts as heat sink that more efficiently transfers heat to the socket support thereby enabling use of higher wattage light bul... | 07/02/1996 |
| 5406191 | Procedure and apparatus for the control of electric power Procedure and apparatus for the control of electric power, by which procedure the electric power supplied to a load is regulated by means of a regulator, e.g. a thyristor regulator. The regulator control signals, e.g. thyristor firing pulses, are produced... | 04/11/1995 |
| 5327047 | Electrical dimmer system employing alternately applied silicon controlled rectifiers A dimmer control system includes two discrete silicon controlled rectifiers which respectively energize a lamp load during alternate half cycles of the input AC voltage. The separate placement of the SCRs ensures that much lower temperatures are reached t... | 07/05/1994 |
| 5268631 | Power control system with improved phase control An improved phase-controlled power control apparatus includes a semiconductor switching element for varying the effective power delivered to a load from the power lines. The conduction angle of the semiconductor power switch element is varied from a nomin... | 12/07/1993 |
| 5237264 | Remotely controllable power control system A remotely controllable power control system wherein the power supplied to a load may be varied locally via an actuator, positionable through a continuous range, on a wall control or from a remote location using a remote control device not electrically wi... | 08/17/1993 |
| 5208516 | Touch controlled electric light socket with high current tolerance A light socket for engaging and energizing a light bulb is adapted for attachment to a lamp base or other light fixture and has an internal chamber in which a touch responsive control circuit is disposed. The circuit has a solid state switch element which... | 05/04/1993 |
