Electrodeless light source having a lamp holding fixture which has a separate characteristic impedance for the lamp starting and operating mode
Patent 3943401 Issued on March 9, 1976. Estimated Expiration Date: 
March 9, 1993. 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.
March 9, 1993. 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 References3787705 InventorsAssigneeApplicationNo. 570111 filed on 04/21/1975US Classes:315/39, Discharge device load with distributed parameter-type transmission line (e.g., wave-guide, coaxial cable)315/248Induction-type discharge device loadExaminersPrimary: Rolinec, R. V.Assistant: Hostetter, Darwin R. Attorney, Agent or FirmInternational ClassH01J 65/04 (20060101)AbstractA lamp holding fixture for exciting an electrodeless lamp by high frequency power has a switchable characteristic impedance for impedance matching the lamp to the power source during both the starting and operating modes. The fixture has an inner conductor and two outer conductors of different dimensions in cross section. During the starting mode the inner conductor and the larger diameter outer conductor form the power coupling conductors for the fixture thereby providing a high characteristic impedance for matching the lamp impedance to the source output impedance. After starting, the smaller diameter outer conductor may be moved along its longitudinal axis until it contacts the power coupling end of the larger diameter outer conductor so that the inner conductor and the smaller diameter outer conductors form the power coupling conductors during the operating mode. | |
