Electric lamp and discharge devices – With gas or vapor – Having a particular total or partial pressure
Patent
1994-04-18
1995-05-02
Yusko, Donald J.
Electric lamp and discharge devices
With gas or vapor
Having a particular total or partial pressure
313493, 313607, 313635, 313234, 315248, 315344, 315 85, H01J 6500, H01J 6504
Patent
active
054122805
ABSTRACT:
Disclosed is an electrodeless, low pressure gas discharge lamp. The lamp includes a vitreous envelope containing a metal vapor and an inert gas. The envelope is shaped with an external chamber for receiving an electrical excitation circuit. The excitation circuit is effective for exciting the metal vapor to emit light with electromagnetic fields that are passed through the vitreous envelope from outside, to inside, the envelope. A circuit supplies electrical power from power mains to the excitation circuit. A transparent, electrically conductive coating is disposed on the inner surface of the vitreous envelope for suppressing electromagnetic interference on the power mains. An electrically conductive coating is disposed on the outer surface of the vitreous envelope; it is capacitively coupled to the inner conductive coating, via a wall of the vitreous envelope, and is maintained at a suitable potential for suppressing electromagnetic interference on the power mains. The outer conductive coating comprises a matrix of a contiguous, inorganic, glass layer bonded to an exterior surface of the vitreous envelope, and conductive particles embedded in the matrix in a sufficiently dense manner to form a conductive coating.
REFERENCES:
patent: 4010400 (1977-03-01), Hollister
patent: 4922157 (1990-05-01), Van Engen et al.
patent: 5309058 (1994-05-01), Heindl et al.
Arsena Vito J.
Oberle Joseph C.
Scott Curtis E.
Vamvakas Spiro
Corwin Stanley C.
General Electric Company
Hawranko George E.
Patel Nimesh D.
Yusko Donald J.
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