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7583031 |
PAPI 1 style a TILT system
A Style A PAPI system comprises a plurality of identical lamp housing assemblies, each with one or more lamps and each housing assembly including a tilt circuit. A master control includes a...
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7511628 |
Status indicator circuit for a dimmer switch
A load control device for controlling the amount of power delivered to an electrical load from an AC power source comprises a semiconductor switch having a control input, a triggering circuit, a...
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7501769 |
Light fixture with a diagnostic ballast
The invention relates to a light fixture assembly having a ballast substantially maintaining a consistent current and further includes an indicator for indicating a problem with the light fixture...
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7227310 |
Method and devices for controlling loads connected to a power line
The present invention is related to a method and devices for controlling at least one load connected to an AC power line. The method is based on the introduction of interruptions in the line...
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7218057 |
PAPI 1 style B combination lamp bypass and tilt switch and control system
A Style B PAPI system comprises a plurality of identical lamp housing assemblies, each with one or more lamps and each housing assembly including: an electronic bypass circuit with first and second...
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7098877 |
Driver circuit
A driver circuit that allows high-speed switching when the reference current (I) is small. The driver circuit includes a drive current generation circuit ( 220 ) for supplying to a first node ( 232...
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6945666 |
Illumination device with removable power pack
A portable, cable free, industrial troubleshooting stroboscope includes a housing having a light source, a control circuitry, a display and a user control mechanism. A pair of power terminals...
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6791276 |
Gradually lighting/dimming wireless transmission indicator lamp
Gradually lighting/dimming wireless transmission indicator lamp used in a wireless data transmission apparatus. The wireless transmission indicator lamp includes at least one light emitting diode,...
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6737814 |
Enhanced trim resolution voltage-controlled dimming LED driver
Illumination sources, each including at least one light emitting diode, are connected either in series or in parallel by a switching circuit, depending upon an applied input voltage. The switching...
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6717660 |
System for monitoring and testing of light sources
A light monitoring system provides a sensing unit coupled to a luminaire. The sensing unit monitors both the input and the output of the luminaire for both current and voltage. In this manner, a...
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6710553 |
Switching device for controlling a lamp from both a wall switch and the lamp's switch
A control circuit for operating a lamp or other electrically operated device using a conventional wall socket outlet that is selectively energized under the control of a conventional wall mounted...
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6603342 |
Light emitting element driver with low supply voltage
A light emitting element driver composed of two transistors, one ground resistor, one inductance and a single capacitor is arranged to drive an LED with a supplied voltage as low as about 0.92 V....
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6570340 |
Stirring of electrochemical cells for extended life
A device and method for connecting multiple electrochemical cells to a powered device in a manner to allow disconnected cells to autoregenerate while the device is powered. Devices according to the...
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6570505 |
LED lamp with a fault-indicating impedance-changing circuit
In a light-emitting-diode lamp, there is provided an input impedance-changing circuit for establishing a low input impedance circuit when the light-emitting-diode lamp is missingline turned off....
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6445132 |
Multi-mode light-emitting device for underwater applications
A multi-mode light-emitting device having a light source which changes illumination from steady state to flashing dependent on the polarity of the power source connected to its inputs. A multi-mode...
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6368270 |
Lighting apparatus for endoscope and method of using an endoscopic system provided with the lighting apparatus
A lighting apparatus for an endoscope, includes: a light source for emitting light which is transmitted to a distal end of the endoscope via a light guide of the endoscope; a consumption recording...
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6356027 |
0-10V dimming interface protection circuit
A 0-10V dimming interface protection circuit generating an indication that line voltage is applied across first and second leads of the dimming interface controlling light output by a lamp,...
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6292339 |
Output protection for arc discharge lamp ballast
Output protection for arc discharge lamp ballasts is provided by applying sampled ballast current to a burden capacitor selected to present a low impedance across the winding to a substantially...
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6040660 |
Device for controlling the intensity of the light emitted by a lighting element of a lighting apparatus, in particular a flashlight
A device for controlling the intensity of the light emitted by a lighting element of a lighting apparatus, in particular a flashlight, is embodied as a module which can be arranged in series with...
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5986407 |
Control apparatus for permitting operation of an ac-powered lamp unit as an emergency lighting device
A control apparatus for an ac-powered lamp unit includes a charging circuit for generating a constant current output from an ac power source, a storage battery charged by the constant current...
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5917287 |
Operating circuit for high-pressure discharge lamps with an ignition-time bridging function
The circuit for operating a high-pressure gas discharge lamp (HID) has a ice (ZZU) for ignition-time bridging by switching in a second lamp (GL), the ignition-time bridging device (ZZU) being...
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5657117 |
Device for examining optical waveguides
A device for examining optical waveguides comprises a prism to be positioned on the waveguide to be investigated, an entering point at which incoming light enters the device, and control devices...
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5644194 |
Circuit for controlling an indicator light to turn off slowly
A circuit for turning off an indicator light operates in two phases that provide a first rapid discharge phase and a second slow discharge phase. This sequence dims the light in a visual...
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5625260 |
Systems and methods for transmitting pulse signals
The invention relates to a method and system for communicating from the secondary side of an isolation transformer (6) to receiver means, the primary of said transformer being connected via a power...
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5585698 |
Current supply means for a laser flash lamp
Current supply means for a laser flash lamp contain a fast switch and control means which modulate the amplitude of each individual pulse with a presettable modulating frequency and depth of...
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5578998 |
Method and apparatus for predicting of lamp failure
A method and apparatus for identifying electric lamps likely to fail due to a violated internal atmosphere monitor voltage through a resistor in order to ascertain a increasing internal resistance...
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5537006 |
Power supply
A power supply for an incandescent lamp by which sufficient power is supplied to the lamp to enable the lamp to reach its desired color temperature without exceeding the break over voltage of its...
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5442258 |
LED lamp device
An LED lamp device is made up of an LED emitter, a pair of DC voltage input terminals, a circuit connecting between the LED emitter and the pair of DC voltage input terminals, and at least one...
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5422543 |
Flash monitor alarm system
A flash monitor alarm system is provided for detection of emergency vehicle flashers or for detection of flashes in photography. For emergency flasher detection the unit is positioned in a vehicle...
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5311100 |
Water-activated survival lamp unit and an improved water-responsive switch therefor
A water-activated survival lamp unit for mounting to a flotation device in proximity to the water line. The survival lamp unit comprises a hermetically sealed light transmissive housing in which...
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5300863 |
Auxiliary lighting circuit for a gaseous discharge lamp
A non-arcing electrical switch is disclosed wherein a solid-state switching element is operated in response to current flow within an external circuit. The switch is particularly suitable for use...
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5291100 |
Low watt metal halide lamp apparatus
A low DC input, low wattage, high efficacy metal halide arc discharge lamp apparatus is provided which has a simplified control system including a regulated power supply, a forty kilohertz...
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5223678 |
Replacement elevator call button unit
A replacement elevator call button unit which may be electrically connected to an elevator controller having first and second power supply lines and having an elevator call registering terminal....
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5179325 |
Touch-sensitive illuminable door lock
An illuminating circuit for the key slot in a locking device is made up of a high intensity light source which is mounted on the face plate of the lock in close proximity to the key slot, a...
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5115165 |
Safety lighting means for use with a high intensity discharge lamp
This safety lighting arrangement is especially suited for use with variously rated HID light sources having current ratings ranging from relatively low to relatively high values. The safety light...
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5109244 |
Electronic flash apparatus for cameras
In a camera system including an electronic flash apparatus, a main capacitor of the flash apparatus is charged for a predetermined time interval, in response to a preparatory operation such as a...
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5099177 |
Lamp circuit with disconnected lamp detecting device
A plurality of current transformers connected in series provide secondary winding sides respectively connected to lamps. A constant-current source is provided to supply constant current to these...
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5061879 |
Dual filament lamp control system
The present invention provides a Control Module 15 for controlling a dual filament bulb, in particular aircraft reading lamps, so as to detect the failure of one filament and energize the other...
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5025195 |
Current monitoring
A circuit arrangement includes a lamp filament (1) as a load and a resistor (2) in series with the filament. For detecting the current through the load, the source of a MOSFET (6) is connected with...
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5017837 |
Indicator lamp system
An indicator lamp indicates the status of an electrically-powered load control system by providing dim light when the load power is off and a brighter light when the load power is on. In another...
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4980672 |
Overhead socket smoke detector with theft alarm
An overhead socket smoke detector with a theft alarm includes a case with a bulb base at one end and a lamp socket at an opposite end and connected to the bulb base by a socket switch which is...
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4810936 |
Failing lamp monitoring and deactivating circuit
A discharge lamp monitoring and deactivating circuit includes a normally closed switch in series with the discharge lamp and its ballast and a detector circuit connected across the lamp to monitor...
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4672367 |
Optical indicator device
An optical indication circuit in which a light-emitting diode is included in the feed current path of an IC which is energized via a dissipation resistor and a rectifier diode directly from the...
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4522479 |
Flash apparatus with power supply control device
Disclosed is a power supply control device which automatically cuts off power to a flash apparatus by turning off a power switch a predetermined time after the switch is turned on to prevent waste...
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4467246 |
Light quantity controller and input device
A light quantity controller and an input device are disclosed. The light quantity controller comprises a light source, a photo-sensor to detect a light quantity of the light source, a signal source...
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4451824 |
Color convergence data processing in a CRT color display station
A preconverged color display station is disclosed which is compatible with a computer controlled control unit that provides electrical convergence control signals. Compatibility is obtained by...
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4395658 |
Proper light emission indicating device for computer flash device
In the disclosed device, a sensor produces a corroborating signal when a computer flash unit emits a flash proper for an exposure. A timer energizes an indicator for a predetermined time in...
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4376910 |
Power supply and control device for the proper operation of a railway traffic light
A periodic current generator is connected with a long power supply line through a first transformer. The lamp of the traffic light is connected to the long line through a second transformer. First...
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4315196 |
Disconnection detecting circuit of double-filament spherical lamp
A fault detection apparatus for use with a double-filament lamp utilizes the temperature-related changes in resistance of the non-energized filament to indicate a break in the energized filament....
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4307301 |
Electric circuit arrangement for replacement of an electric switch, with combined pushing and locking function for automotive vehicles
An electric circuit arrangement to replace the combined pushing and locking electric switch of the type used in DC fed automobile blinker systems, characterized by a signal detection unit...
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