skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Very high efficacy electrodeless high intensity discharge lamps

Abstract

An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.

Inventors:
 [1]
  1. Schenectady, NY
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
866421
Patent Number(s):
4705987
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
efficacy; electrodeless; intensity; discharge; lamps; lamp; comprises; outer; jacket; hermetically; sealing; thermally; protecting; tube; inside; upwardly; convex; bottom; center; section; absence; chemically; reactive; electrode; material; makes; metal; halides; iodides; contains; chlorides; bromides; mixture; scandium; sodium; nearly; equimolar; relationship; addition; mercury; inert; gas; color; balance; obtained; reduced; reservoir; temperature; power; loss; reduction; wall; attain; life; center section; hermetically sealing; outer jacket; chemically react; power loss; intensity discharge; metal halides; active electrode; discharge lamp; inert gas; metal halide; electrode material; wall temperature; chemically reactive; lamp comprises; upwardly convex; thermally protecting; hermetically seal; discharge lamps; /313/

Citation Formats

Johnson, Peter D. Very high efficacy electrodeless high intensity discharge lamps. United States: N. p., 1987. Web.
Johnson, Peter D. Very high efficacy electrodeless high intensity discharge lamps. United States.
Johnson, Peter D. Thu . "Very high efficacy electrodeless high intensity discharge lamps". United States. https://www.osti.gov/servlets/purl/866421.
@article{osti_866421,
title = {Very high efficacy electrodeless high intensity discharge lamps},
author = {Johnson, Peter D},
abstractNote = {An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

Save / Share: