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Starter for low-pressure discharge lamps
   
Document Number
US Patent 7541753
Issued Date
June 2, 2009
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Abstract
Disclosed is a starter for AC-fed low-pressure discharge lamps that are operated on a series inductor. The starter comprises a glow fuse, a high-temperature conductor (NTC resistor) that is serially connected to the glow fuse, and a resetting bimetal switch which is serially connected to the glow fuse and the high-temperature conductor and is in thermal contact therewith. The high-temperature conductor is provided with high resistance in a cold state, which is transformed into low resistance by elements of built-up heat while the bimetal switch interrupts the electrode heating circuit when the low-pressure discharge lamp fails to ignite. According to the invention, the current is conducted via the high-temperature conductor for both igniting the low-pressure discharge lamp and switching off when the discharge lamp fails to ignite.
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Number of Claims:
16
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Published
June 2, 2009
Application Number
11/885,169
Filed
February 6, 2006
US Classification
315/362   315/100 315/209R
Int'l Classification
H05B   41/00   (20060101)  
Examiner
Assistant Examiner
Priority Data
Feb 28, 2005 [DE] 10 2005 009 057
USPTO Field of Search
315/362   315/112   315/113   315/114   315/115   315/116   315/117   315/118   315/326   315/94   315/100  
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