The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1991
Filed:
Oct. 05, 1989
Applicant:
Inventor:
Harald L Witting, Burnt Hills, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315248 ; 31511151 ; 315 39 ; 313151 ;
Abstract
A starting aid for an electrodeless high intensity discharge lamp comprises a first conductive coil disposed about a second conductive coil, the coils each having a truncated-cone shape. The coils are wound in opposite directions so that voltages induced therein add together to provide a sufficiently high electric field gradient to initiate a plasma discharge in the arc tube. The coils are movable between a starting position adjacent to the arc tube and a lamp-operating position at a predetermined location away from the arc tube.