Compact halogen-cycle incandescent lamp, and lamp unit utilizing such lamp as a light source
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 31, 1984
Issued Date -
N/A
app pub date -
Nov 15, 1982
filing date -
Aug 11, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compact halogen-cycle type incandescent lamp is provided with an envelope that is composed of a selected hard glass (a borosilicate or an aluminosilicate type glass for example) and then dosed with an amount of bromine which is correlated with the glass composition in such a manner that it counteracts the deleterious release of water-vapor forming constituents by the glass envelope when the lamp is energized and the glass is hot. The halogen-cycle lamp is especially adapted for use as the concentrated light source in a general service type lamp or a sealed-beam headlamp and, when so employed, has a fill gas pressure that is so correlated with the gas pressure of the non-oxidizing atmosphere in the outer envelope that the total gas pressure does not exceed 1,000 Torr and the envelope of the halogen-cycle lamp operates at a temperature which is sufficient to reliably sustain the halogen cycle but is below the softening temperature of the particular hard glass from which the halogen lamp envelope is made. In the case of a lamp intended for general lighting or residential illuminating purposes, the halogen-cycle lamp component contains iodine rather than bromine since iodine-cycle lamps produce a 'warm' light effect.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully