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7602305 |
Feedback circuit for a display sign and method
A feedback circuit for a display sign has a number of lights. A resistor is coupled in series with the lights. A voltage measuring circuit is coupled to the resistor.
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7378987 |
Traffic control malfunction management unit with per channel red enable
A method and apparatus for monitoring for Red Fail faults in a traffic signal control system. Traffic control signals generated by a traffic control unit are grouped into channels. Certain channels...
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7259685 |
Landing light fault annunciator
A helicopter of the type having an electrical system, a landing light, a master switch and a power supply of between about 18-32 V for operating the electrical system when the master switch is in...
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7250872 |
Method and device for testing at least one LED strip
A test device for at least one LED strip contains: a voltage source, by way of which a cold test voltage or a warm test voltage can be applied to a parallel circuit formed of a test resistor and...
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7109886 |
Traffic control malfunction management unit with co-channel monitoring
A method and apparatus for monitoring for Red Fail faults in a traffic signal control system. Traffic control signals generated by a traffic control unit are grouped into channels. A parent-child...
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7102540 |
Remote access of an airport airfield lighting system
Remote monitor and control of an airfield lighting system. A processing system local to the airport is provided in communication with the airfield lighting system for monitor and control thereof,...
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7046132 |
Lamp monitor and method for operating a lamp monitor
A lamp monitor for a bus or other motor vehicle has a processor, a current sensor, a memory and a display for monitoring the current through the lamps. In program mode, the processor samples the...
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7023353 |
Warning device status circuit including a status output device
A warning device including a status and function indicator circuit for indicating the status and function of the warning device. In a visual warning device such as a strobe light, the status and...
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7002453 |
Remote lamp status display via fiber optic system
A method and apparatus are provided for remotely monitoring the status of a variety of illumination devices. A fiber optic cable coupled to a light fixture transmits a light display. Based on the...
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6982648 |
Lighting or indicating light unit for a vehicle and lighting or indicating system equipped with at least one such light unit
A light unit or indicating device for a vehicle (.e.g., a vehicle lighting unit, a vehicle indicating unit, reversing radars and other systems) has a shell, a light contained in the shell, and an...
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6930613 |
Electrical instruments circuits
A device representing a simple means of multiplying the functionality of wiring in point to point control circuits such that fault tolerant, fault reporting circuits can be constructed with less...
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6867703 |
Safety-protection circuit
In the process of drilling a concrete in a building, many times contact and damage can accidentally be made with existing electrical conduit and the wires inside, or plumbing pipes. This damage can...
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6788195 |
Light monitor
A monitor for a light circuit comprising a power source, a light being monitored, and a sense resistor. A first voltage amplifier circuit connected to the light circuit has a first output signal...
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6774785 |
Front panel light system for an electronic instrument which indicates the operating condition of the front panel lights and selected portions of the instrument
The system tests front panel lights, such as LEDs, on an electronic instrument, the front panel lights being normally used to indicate the status of selected output conditions of the instrument....
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6720883 |
Warning device status circuit including a status output device
A warning device including a status and function indicator circuit for indicating the status and function of the warning device. In a visual warning device such as a strobe light, the status and...
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6603302 |
Circuit testers
A circuit tester ( 1 ) for testing circuit integrity in a series-wired string of Christmas fairy lights powered by domestic mains electricity. The tester comprises or includes a housing; a probe...
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6583731 |
Fault detection for traffic light systems using electronic lighting elements
An indicator controller ( 18 ), an optical assembly ( 10 ) having the indicator controller ( 10 ), a traffic light system that comprises at least one of the optical assembly ( 10 ) and a method for...
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6573840 |
Supervision and control of airport lighting and ground movements
In an arrangement for supervising and controlling field light units ( 20 ) at an airport, a regulator provided with a monitoring unit for power supply and for monitoring the light units is arranged...
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6556017 |
Deteriorated filament detection
A Method and an arrangement providing detection of deteriorated lamp filaments ( 3 ) in a lamp circuit ( 11 ) fed by constant current, in particular for a lamp supervision system for airfield...
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6504485 |
Monitoring apparatus and control apparatus for traffic signal lights
Monitoring and control apparatus for fail-safe monitoring for normal operation of traffic signal lights provided at an intersection or the like where a plurality of roads intersect. The...
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6456091 |
Power line conditioner with voltage and current amplitude tracking
An apparatus and a method using a power line conditioner having a conventional grounded plug disposed at one end of a short three-wire cord and a housing disposed at the opposite end for providing...
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6392553 |
Signal interface module
An apparatus and method are provided for interfacing railway controllers with light units, such as LED light unit arrays, to shunt and/or disable test signals not traditionally intended to test...
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6300878 |
Constant current regulator using IGBT control
A constant current regulator that receives an AC input current from a source provides a constant AC current to a load. The regulator includes first, second, third, and fourth electronically...
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6243017 |
Method and arrangement for determining remaining operating life of fluorescent lamp
A method for determining the remaining operating life of a fluorescent lamp, when the fluorescent lamp is connected to a starter and the fluorescent lamp comprises cathodes. The method is...
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6218953 |
System and method for monitoring the light level around an ATM
The present invention is generally directed to a system and method for monitoring the level of light surrounding an automatic teller machine (ATM). In accordance with one aspect of the invention, a...
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6163264 |
Electrical connectors, lamps and lampholders
A lamp has a tungsten filament within an evacuated glass bulb and connected to electrical conductors. Connected between the two electrical conductors are a series-connected neon and resistor. In...
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6157296 |
Lamp burnout detecting unit with branch connection function
The invention is a lamp burnout detecting unit with a branch connection function which provides the advantage of having simple wiring and that the wire harness thereof can be automatically laid....
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6147620 |
Remote monitoring of elevator cab lights
To sense the level of light in the passenger compartment 7 of an elevator cab 8, light at the proximal end of an optical fiber 4 is monitored by an optical detector 25 feeding a variable voltage...
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6081189 |
Apparatus for testing the light circuit of a trailer
An apparatus is provided for electrically testing the standard light circuit of a trailer. The apparatus includes a battery and a flasher component electrically connected to a positive terminal of...
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6031451 |
Electrical circuits for turn signal, hazard signal and brake signal lights
An electrical circuit for turn signal, hazard signal, and brake signal lights of an automotive vehicle has first and second relays each having an energizable coil and contacts which are in a first...
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6028522 |
System for monitoring the light level around an ATM
The present invention is generally directed to a system and method for monitoring the level of light surrounding an automatic teller machine (ATM). In accordance with one aspect of the invention, a...
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6002330 |
Control system for vehicle lighting
A lighting system for a towed off-highway vehicle has a left and right hazard warning lamps that flash in unison when the vehicle is not turning. When the vehicle is turning, the hazard warning...
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5977879 |
Display device and an inspection circuit
A display device having driving circuits one for each of its light-emitting elements permits easy inspection of the driving circuits. The display device is formed as a fluorescent display tube that...
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5969642 |
Airfield lighting system
A microprocessor-controlled airfield lighting control and monitoring system having bi-directional communication between the controlling microprocessor and the airfield lights and/or sensors. The...
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5955945 |
Fail safe system for providing warning signals upon the failure of motorcycle brake or tail lights
A system for use in monitoring the operation of motorcycle brake and tail lights is disclosed which, upon determination that a brake or tail light is not operating properly to provide a warning...
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5926115 |
Airfield series circuit communications lighting system and method
A microprocessor-controlled airfield series lighting circuit communications system and method allows bi-directional communication between the controlling microprocessor and the airfield lamps. The...
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5818338 |
Flood light lamp removal alarm
A flood light lamp removal alarm for security lights mounted on or near a home, wherein the lights are designed to turn on automatically if a motion detector is triggered and the ambient light...
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5801633 |
Combination smoke, carbon monoxide, and hydrocarbon detector
A combination smoke, carbon monoxide and hydrocarbon detector including a smoke detection mechanism adapted to transmit a smoke signal upon the detection of smoke, a carbon monoxide detection...
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5801623 |
Method of detecting a lamp outage condition in a vehicle flasher system
An adaptive method of detecting a lamp outage condition is implemented in a vehicle flasher system including a plurality of lamps. The method includes the steps of: a) initializing an adaptive...
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5748093 |
Electrical surge protection system with condition monitoring
A surge protection system having a plurality of surge protection devices for the protection of a power line. Each of the surge protection devices may be in either a ready state in which the surge...
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5744961 |
Lamp disconnection detecting device for identifying a specific lamp which has become disconnected
A lamp disconnection detecting device includes a magnetic core with a gap; a plurality of detecting coils the number of turns of which are different from one another and are proportional to 2 n ...
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5736930 |
Apparatus and method for radiation source failure prediction
An apparatus for warning a user that a radiation source is likely to fail in the near future comprises a radiation source, having a radiance; a detector, responsive to the radiance; a memory,...
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5717335 |
Electric bulb short detection apparatus for traffic signal controller
An improved electric bulb short detection apparatus for a traffic signal controller capable of preventing an erroneous detection of an electric bulb short which is caused due to a voltage variation...
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5646599 |
Failure warning system of electric power unit in vehicle
The duty ratio range of a duty signal DCN transmitted from a high-voltage load controller 12 to a field current controller 103 is divided into several subranges, which are assigned to zones, such...
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5644304 |
Automatic control system of lights in a series circuit illumination plant, in particular lights for airport signalling
An automatic control system for a series circuit, in particular for airport signaling lights, physically separated from the work circuit feeding the lights and galvanically separated from the...
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5638057 |
Ground fault detection and measurement system for airfield lighting system
The present invention includes an airfield lighting and control system for energizing at least one airfield control device and containing a ground fault detection system, comprising: (1) at least...
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5604436 |
Christmas light string circuit tester
A device for finding an inoperative bulb in a series string of lights, such as a string of Christmas tree lights having a plug, a pair of electrically conductive leads connected to the plug and...
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5581229 |
Communication system for a power distribution line
The invention provides a layered modulation data communication systems characterized by numerous, asynchronous data transmitters operating on a power line. Data is modulated onto relatively low...
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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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5574423 |
Self-diagnostic circuit for emergency lamphead
A self-diagnostic circuit for an emergency lamphead is disclosed that is effective during standby operation of the lamphead to indicate whether the lamphead is capable of operating in an emergency...
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