High-power, single-ended, high-pressure discharge lamp with hot-

Details High-power, single-ended, high-pressure discharge lamp with hot- High-power, single-ended, high-pressure discharge lamp with hot-

1995-08-24

1996-07-30

Zimmerman, Brian

Electric lamp and discharge devices

With envelope

Having base and connector

H01J 554

Patent

active

055414729

ABSTRACT:
To be able to accept high-voltage pulses, in the order of 70 kV, required r re-starting a hot high-power high-pressure discharge lamp, having a power rating, for example, of 6 kW and up, including 12 kW, a ceramic base is provided with auxiliary mica strips or plates (13) positioned between part of the terminal posts or pins, and especially in the region of retentions flanges or rims formed thereon, and extending up to about the end portion (4a) of a pinch or press seal, into which connection leads extend, connected to the pins or posts. The additional mica strips or plates (13), for example located on both sides of a central separating strip (10), retained in suitable grooves or slots (14) formed in the base effectively prevent arc-over, creep currents and corona discharge between the terminal pins or posts (8a, 8b), the circumferentially projecting flanges or rims (16a, 16b) and the connected current supply leads (7a, 7b). Typically, the pins or posts are closer together than the current leads (7a, 7b) at their point of entry into the pinch or press-sealed end (4a) of the lamp bulb (4).

REFERENCES:
patent: 3610983 (1971-10-01), Grabner et al.
patent: 4533851 (1985-08-01), Block et al.
patent: 4758760 (1988-07-01), Cox et al.
patent: 4866341 (1989-09-01), Ichiga et al.
patent: 4985656 (1991-01-01), Westlund, Jr. et al.

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