Electrodeless low-pressure discharge lamp

Details Electrodeless low-pressure discharge lamp Electrodeless low-pressure discharge lamp

1985-06-05

1987-04-28

Moore, David K.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315 39, 315344, 313488, H05B 4116

Patent

active

046617469

ABSTRACT:
An electrodeless low-pressure discharge lamp comprising a lamp vessel (1) sealed in a vacuum-tight manner and filled at least with a metal vapor and a rare gas, the lamp being provided also with a cylindrical core (2) of magnetic material, such as ferrite, a winding (4) arranged to surround the core (2) and an electrical supply unit connected thereto for producing during operation of the lamp an electrical field in the lamp vessel (1). The supply unit is located in a thin-walled metal housing (8) provided in a wall portion (9) of synthetic material, which is partly of conical shape and is provided at its end with an Edison lamp cap (10), and the core (2) accommodates a rod-shaped or tubular body (11) of thermally conducting material connected to the housing (8). In order to improve the ignition properties of the lamp, an electrical insulator (12) is provided between the end of the body (11) and the wall of the housing (8).

REFERENCES:
patent: 2974243 (1961-03-01), Marrison
patent: 3196312 (1965-07-01), Marrison
patent: 4024431 (1977-05-01), Young
patent: 4119889 (1978-10-01), Hollister
patent: 4189661 (1980-02-01), Haugsjaa et al.
patent: 4266167 (1981-05-01), Proud et al.

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