Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Filament – electric heater – or resistance in shunt with the...
Patent
1982-07-30
1984-04-10
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Filament, electric heater, or resistance in shunt with the...
315 46, 315 73, 315116, 315117, H05B 4116
Patent
active
044423780
ABSTRACT:
An improved high pressure sodium vapor lamp is described having resistance heater means contained within a tubular light-transmitting ceramic envelope that further contains a reservoir of sodium-mercury amalgam in excess of the quantity vaporized during lamp operation in order to heat the ceramic envelope before lamp starting and thereby reduce the starting voltage requirements. In the preferred embodiment, said resistance heater means comprises a refractory metal coil wound around the tungsten shank of one thermionic electrode and electrically insulated therefrom and which is supplied with lower current than is subsequently applied to said electrodes for the lamp operation.
REFERENCES:
patent: 3851207 (1974-11-01), McVey
patent: 4182976 (1980-01-01), Larson
Frey Robert G.
McVey Charles I.
General Electric Company
Jacob Fred
LaRoche Eugene R.
McDevitt John F.
Schlamp Philip L.
LandOfFree
High pressure sodium vapor lamp having resistance heater means 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 sodium vapor lamp having resistance heater means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High pressure sodium vapor lamp having resistance heater means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-894912