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49results about How to "Useful life" patented technology

System And Method For Controlling A Matrix Of Light Emitting Diodes And Light Provided Therewith

A system and method for controlling a matrix of light emitting diodes (LED) connected to an input line comprises a power converter for connecting to the matrix of LEDs and to the input line therebetween and for receiving from the input line an input current and an input voltage characterized by a shape and a frequency and for providing a direct current (D.C.) output for powering up the LEDs, yielding an operating current through the LEDs. The power converter includes a first current sensor for sensing the input current and a second current sensor for sensing the operating current. The system further comprises a controller for connecting to both the input line and to the power converter. The controller includes a voltage sensor for sensing the input voltage and a pre-regulator i) for receiving the operating current, the input current and the input voltage, ii) for biasing the operating current towards a target current value, and iii) for regulating the power converter to cause the input current to follow the shape and frequency of the input voltage, yielding a unity power factor and minimizing the input current harmonic distortion. The present method and system allows maximizing the energy savings, controlling current flowing in the diodes so as to obtain the maximum flux of light with the minimum energy and also allows meeting all safety, EMI, reliability and robustness requirements.
Owner:ELUMEN LIGHTING NETWORKS

Window lift mechanism

A window lift mechanism includes a worm / worm gear transmission with an improved transmission housing having a worm gear shaft formed in-situ as well as a pinion gear formed as a unitary member with the worm gear in order to reduce the number of components and improve the assembly process.
Owner:FENELON PAUL J

Alkaline and Heat Resistant Foam Composite and Floor Underlayment

InactiveUS20110197543A1Durability and useful life of be extendMaterial degradationConstruction materialFloorsFree radicals scavengerPolymer
The invention is directed to a composite foam material that is alkaline and heat resistance. The composite foam material comprises a foam layer that having a film layer attached thereto and in which at least one of the film or foam layers includes a carbon free radical scavenger agent that is dispersed therein. The carbon free radical scavengers neutralize free radicals that are generated in the polymeric material (e.g., film or foam layer) and help prevent the degradation of the foam composite material. In particular, foam composite materials in accordance with the present invention can be used in underlayment applications in which exposure to heat can degrade the underlayment. As a result, the durability and useful life of the composite sheet material can be extended. In some embodiments of the present invention provides a floor underlayment material that overcomes many of the problems discussed above.
Owner:SEALED AIR U S

Apparatus and method for limiting excessive engine speeds in a light-duty combustion engine

A controlled slow down apparatus and method for use in the event that a light-duty combustion engine has entered a state of excessive speeds or auto-ignition. The controlled slow down method is preferably initiated when the engine speed exceeds an activation speed for a predetermined number of engine revolutions. Once initiated, the controlled slow down method uses a combination of ignition timing and spark ratio manipulations in order to disrupt the auto-ignition conditions and slow down the engine in a controlled manner. Preferably, the controlled slow down method is only one part of an overall ignition control method, and can be incorporated within or utilized by one of a number of different ignition timing methods known in the art.
Owner:WALBRO ENGINE MANAGEMENT
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