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Class 315/136 - Electrically operated switch controlling the signal circuit


Subclass of Class 315 - Electric lamp and discharge devices: systems
Definition: Systems having an electrical signal, indicator, or alarm
No. of patents: 82
Last issue date: 07/12/2011


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NumberTitleIssue Date
7977887Low leakage current LED drive apparatus with fault protection and diagnostics
An LED drive apparatus includes a microprocessor having a configurable input/output port, a FET current control transistor, and a diagnostic interface circuit. The diagnostic interface circuit includes a transistor having an input coupled to a junction between the F...
07/12/2011
7282869HID ballast and lamp tester
The instant invention relates to an HID ballast and lamp tester, which provides visual indication of failure of either the ballast or lamp by continuously monitoring the status of the HID lighting system. The HID ballast and lamp tester detects and utilizes the volt...
10/16/2007
7274117Radio wall switch
A radio wall switch that uses radio signals to control a load through a load circuit is disclosed. The radio wall switch is also configured group or bind electronic devices to operate collectively by responding to the same radio control signals. Preferably, the radi...
09/25/2007
7247999Dimmer for use with a three-way switch
A smart dimmer for controlling the intensity of a lighting load from a source of AC power is operable to replace one of the three-way switches in a standard three-way lighting system without the need to replace the other three-way switch with a unique accessory swit...
07/24/2007
7227310Method 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 voltage, which correspond to data being sent. The method centers on interru...
06/05/2007
7218057PAPI 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 oppositely poled SCRs coupled across the terminals of each lamp; a z...
05/15/2007
7180021LED illuminated door chime push button with adjustable task light
An illuminated doorbell pushbutton assembly includes a pushbutton assembly that uses a light source, or a plurality thereof to illuminate the pushbutton. The assembly also includes a user-adjustable rotating task light that can be used to direct light to a door lock...
02/20/2007
7172306Lighted deadbolt
A deadbolt having an integral light that is activated only when the deadbolt is properly locked includes a conventional deadbolt housing attached to a door. The housing includes a latch section that is mounted on an inner surface of a door having a drive member ther...
02/06/2007
7113893Lamp monitoring and control unit and method
A unit and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control unit comprises a processing and sensing unit for sensing at least one lamp parameter o...
09/26/2006
7098877Driver 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) a drive current based on a binary data signal (DATA); a ...
08/29/2006
6945666Illumination 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 internal to the housing connect to a removable power pack. One or more eas...
09/20/2005
6933833Remote control with LED capabilities
A universal remote control comprising a keyboard having a plurality of pushbuttons including a macro pushbutton and a library of codes and data for use in transmitting operating commands to a plurality of different home appliances of different manufacturers. Instruc...
08/23/2005
6911777Clamp-on low power isolation transformer for airfield lighting
A clamp-on isolation transformer for an airfield lighting fixture in an airfield lighting system includes a first portion configured to receive a portion of a primary conductor of a primary current loop and a second portion configured to receive another portion of t...
06/28/2005
6791276Gradually 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, a wireless transceiver circuit for receiving or transmitting radio si...
09/14/2004
6737814Enhanced 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 circuit switches the illumination sources from series- to parallel-co...
05/18/2004
6717660System 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 variety of problems with the luminaire can be detected by the sensor an...
04/06/2004
6710553Switching 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 switch. To permit the lamp to be independently controlled using either...
03/23/2004
6603342Light 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. The transistors include an NPN transistor and a PNP transis...
08/05/2003
6570505LED 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. This input impedance-changing circuiting comprises Shunt cir...
05/27/2003
6570340Stirring 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 present invention have two or more cells and methods of s...
05/27/2003
6445132Multi-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 switch mechanism which changes from manually activated to...
09/03/2002
6368270Lighting 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 device for recording the consumed light-emission time of t...
04/09/2002
63560270-10V 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, includes a first device for limiting current serially connected b...
03/12/2002
6323598Enhanced 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 circuit switches the illumination sources from series- to ...
11/27/2001
6292339Output 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 symmetrical waveform of the sample current. Asymmetry between...
09/18/2001
6040660Device 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 the lighting element for the supply of the latter with curr...
03/21/2000
5986407Control 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 output and supplying a dc voltage output, a first high-voltage ...
11/16/1999
5917287Operating 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 driven by a signal (S) indicating the operating state of the h...
06/29/1999
5657117Device 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 for altering the angle of light directed to the prism from t...
08/12/1997
5644194Circuit 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 approximation of the exponential dimming that occurs with lights tha...
07/01/1997
5625260Systems 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 cable to a circuit fed with a periodic voltage from a con...
04/29/1997
5585698Current 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 modulation. This permits higher peak envelope powers to be obtai...
12/17/1996
5578998Method 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 of the lamp. The apparatus of the present invention prefer...
11/26/1996
5537006Power 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 filament even though the peaks of the alternating current v...
07/16/1996
5497051Current 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 modulation. This permits higher peak envelope powers to be obtai...
03/05/1996
5442258LED 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 constant-voltage diode and at least one constant-current diode...
08/15/1995
5422543Flash 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 within a direct line of sight of potential emergency flash...
06/06/1995
5311100Water-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 are mounted a light source and a battery in an electrical ci...
05/10/1994
5300863Auxiliary 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 within an auxiliary lighting circuit of a gaseous discharge...
04/05/1994
5291100Low 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 oscillator and driver for powering the bulb a main power transform...
03/01/1994
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