High-pressure discharge lamp with low power input

Details High-pressure discharge lamp with low power input High-pressure discharge lamp with low power input

1983-04-13

1986-12-30

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313631, H01J 6106, H01J 6136

Patent

active

046331360

ABSTRACT:
A high-pressure discharge lamp with metal halide additives and a power in of less than 100W comprises electrodes (4, 5) which have a shank portion (18) adjacent the seal and a second portion (19) which is formed as a coil and faces the discharge. Adjacent turns of the coil portion (19) do not contact one another. Shank (18) and coil (19) are preferably made of a single piece of wire. In the case of a double-ended arc tube (FIGS. 1 and 2) the axis of the coil portion (19) forms a substantially straight line with the shank portion (18). In the case of a single-ended arc tube (FIGS. 3 and 4) the axis of the coil portion includes an angle of 90.degree. with the axis of the shank portion. In order to protect the electrode, and especially the shank portion from corrosion, the shank (18) of the electrode (4, 5) is surrounded by a conical filament (17) of refractory metal e.g. tungston whose turns are lying closely together. Due to the specific shape of the electrode (4, 5), quicker starting of the lamp is achieved, even when the lamp is still warm.

REFERENCES:
patent: 3349276 (1967-10-01), Jacobs et al.
patent: 3484637 (1969-12-01), Van Boort et al.
patent: 3947714 (1976-03-01), Rehder et al.
patent: 4101796 (1978-07-01), Kuus
patent: 4232243 (1980-11-01), Rigden
patent: 4275329 (1981-06-01), Fridrich et al.
patent: 4387319 (1983-06-01), White et al.
patent: 4415829 (1983-11-01), Rothwell, Jr. et al.

Affiliated with

Also associated with

Rating

High-pressure discharge lamp with low power input does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High-pressure discharge lamp with low power input, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-pressure discharge lamp with low power input will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1549577