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US Patent 4001631 - Adjustable length center conductor for termination fixtures for electrodeless lamps
US Patent Issued on January 4, 1977
Estimated Patent Expiration Date:
January 4, 1994Estimated 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.
Estimated Patent Expiration Date:
January 4, 1994Estimated 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.AbstractA light source includes a source of high frequency power, an electrodelsss lamp and a termination fixture for coupling power to the lamp, the fixture having an outer conductor and an inner conductor whose length is adjustable for providing dynamic matching of the impedance of the lamp during the operating mode to the output impedance of the source. Variations in the power level from the source, such as is desirable in providing lamp brightness selectivity, vary both the real and imaginary components of the lamp impedance, and corresponding adjustments of the inner conductor length provide a tuning technique to compensate for these variations. | InventorsAssigneeApplicationNo. 632328 filed on 11/17/1975US Classes:315/39, Discharge device load with distributed parameter-type transmission line (e.g., wave-guide, coaxial cable)313/248, Conductive envelope supports plural electrodes313/261, Plates or bars at opposed ends of electrodes313/344, Coiled313/567, WITH GAS OR VAPOR333/33Having long line elementsField of Search315/248, Induction-type discharge device load315/267, Electromagnetic influenced discharge device load315/268, Discharge control discharge device load315/344Electromagnetic influenced discharge deviceExaminersPrimary: Chatmon, Saxfield Jr.Attorney, Agent or FirmUS Patent References3787705, 3873884, 3943401, Electrodeless light source having a lamp holding fixture which has a separate characteristic impedance for the lamp starting and operating modeIssued on: 03/09/1976 Inventor: Haugsjaa , et al.3943402, Termination fixture for an electrodeless lamp Issued on: 03/09/1976 Inventor: Haugsjaa , et al.3943403Electrodeless light source utilizing a lamp termination fixture having parallel capacitive impedance matching capability Issued on: 03/09/1976 Inventor: Haugsjaa , et al. International ClassH01J 65/04 (20060101) |
