Electrodeless lamp having a narrow gap between a sealed tube and

Details Electrodeless lamp having a narrow gap between a sealed tube and Electrodeless lamp having a narrow gap between a sealed tube and

1995-03-10

1997-06-10

Pascal, Robert

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

313634, H05B 4116

Patent

active

056379633

ABSTRACT:
An electrodeless high intensity discharge lamp has a light transmissive ceramic arc tube for containing a discharge sustaining medium and a hollow tube member. An excitation coil for causing an arc discharge is situated about the arc tube. The ceramic arc tube includes a first portion for developing the arc discharge therein and a second portion protruding outwardly from the first portion. The hollow tube member is so disposed in the second portion that a space is provided between the inner wall surface of the second portion and the outer wall surface of the hollow tube member. The space is in communication with the interior of the first portion for allowing the medium to be condensed and retained during the lamp operation.

REFERENCES:
patent: 5136214 (1992-08-01), Roberts et al.

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