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:
Mar. 02, 1976
Filed:
Apr. 21, 1975
Paul Osborne Haugsjaa, Acton, MA (US);
William Henry McNeill, Carlisle, MA (US);
Robert James Regan, Needham, MA (US);
Joseph Martin Lech, Westford, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
An electrodeless lamp is excited in a termination fixture by high frequency power, the lamp being located within the fixture at the end of an inner conductor whose end is shaped such as to inhibit the arc of the lamp from attaching to the lamp envelope. In one embodiment, the inner conductor end is shaped as a hollow helical coil which generates an axial and azimuthal electric field component to create a torodial arc within the lamp. In another embodiment the inner conductor end is cup-shaped to provide a field shielding effect which distributes the field strength more uniformly across the end of the inner conductor.