Electric lamp and discharge devices – With magnetic device – With envelope
Patent
1990-01-25
1991-04-09
Yusko, Donald J.
Electric lamp and discharge devices
With magnetic device
With envelope
313 34, 313 44, 313 45, 313 46, 313493, 315248, H01J 150, H01J 6504, H01J 6100
Patent
active
050067524
ABSTRACT:
Electrodeless low-pressure discharge lamp having a discharge vessel which is sealed in a gastight manner and is filled with an ionisable metal vapor and a rare gas, which lamp has a cylindrical core of a magnetic material in which during lamp operation an electromagnetic field is generated in the discharge vessel by a metal wire winding surrounding the core and a high-frequency electric power supply unit connected thereto, the magnetic material core being provided with a cooling body consisting of a heat pipe which is located at the area of the longitudinal axis of the core and is surrounded by the core at least as far as the proximity of its first end, while the second end of the heat pipe is maintained at a relatively low temperature.
REFERENCES:
patent: 2350348 (1944-06-01), Gaugler
patent: 4536675 (1985-08-01), Postma
patent: 4727294 (1988-02-01), Houkes et al.
patent: 4727295 (1988-02-01), Postma et al.
patent: 4728867 (1988-03-01), Postma et al.
patent: 4927217 (1990-05-01), Kroes et al.
Eggink Hendrik H. J.
Friedrichs Winand H. A. M.
Netten Adriaan
Schuiteman Martin W.
van der Aa Herman H. M.
Patel Nimeshkumar
U.S. Philips Corporation
Wieghaus Brian J.
Yusko Donald J.
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