High-pressure discharge lamp, and method of its manufacture

Details High-pressure discharge lamp, and method of its manufacture High-pressure discharge lamp, and method of its manufacture

1986-12-29

1988-06-28

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Having lead-in shield

174 5059, 174124R, 439182, 313318, 313332, 313334, H01J 6130

Patent

active

047541954

ABSTRACT:
To improve the high-voltage flash-over characteristics of high-pressure dharge lamps (1), and especially to prevent flash-over between terminal leads emanating from the lamp bulb and extending into a lamp base (14), the lamp base which is formed with a cup-shaped opening (13) has an insert pad (18) placed therein of fibrous web, pile, fleece or mat material, made of ceramic, quartz or glass fibers. In manufacture, the fibers are compressed, thereby fitting tightly against the terminal end, typically a pinch or press seal, of the discharge lamp bulb, and thereby substantially increasing the high voltage flash-over resistance between the terminal leads and permitting hot re-ignition of the lamp, which may require pulses of between 15 to 20 kV.

REFERENCES:
patent: 3934067 (1976-01-01), Goldman et al.
patent: 4216406 (1980-08-01), Bjorkman et al.
patent: 4243907 (1981-01-01), Kohl et al.
patent: 4542316 (1985-09-01), Hall et al.
patent: 4568854 (1986-02-01), Westlund, Jr. et al.
patent: 4570104 (1986-02-01), Janssen et al.
patent: 4631446 (1986-12-01), English et al.
patent: 4658177 (1987-04-01), Gosslar et al.

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