Electrodeless lamp using separate microwave energy resonance modes for ignition and operation
August 9, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectrodeless light source having improved arc shaping capability Single-sided microwave applicator for sealing cartons Microwave powered electrodeless light source utilizing de-coupled modes Electrodeless lamp bulb of modified shape for providing uniform emission of radiation Electrodeless lamp having compound resonant structure Electrodeless lamp having hybrid cavity Electrodeless lamp which couples to small bulb Microwave lamp with rotating field Microwave powered lamp having a non-conductive reflector within the microwave cavity Microwave discharge device with TMNMO cavity Patent #: 5361274 InventorsApplicationNo. 694778 filed on 08/09/1996US Classes:315/39, Discharge device load with distributed parameter-type transmission line (e.g., wave-guide, coaxial cable)315/344Electromagnetic influenced discharge deviceExaminersPrimary: Pascal, RobertAssistant: Bettendorf, Justin P. Attorney, Agent or FirmForeign Patent References
International ClassH01J 065/04AbstractAn apparatus which couples microwave energy to an electrodeless lamp. A source of microwave energy is connected to a wave guide having a slot along one wall thereof. A nominally cylindrical cavity enclosing an electrodeless lamp is closed at one end and coupled at a second end to the slot. The nominally cylindrical cavity has a non cylindrical surface portion which increases coupling from said slot to a second resonant mode which is orthogonal to a first primary resonant mode, creating a high amplitude standing wave in the region of the electrodeless lamp. Once ignition of the lamp occurs, the impedance of the lamp decreases significantly, and most of the microwave power for sustaining illumination is coupled to the electrodeless lamp in the first resonant mode producing a substantially matched load to said microwave source. | |
