Patent · US Expired

Capped high-pressure discharge lamp

US5736811A · kind A · utility

12Cited by

3References

13Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Manfred Westemeyer · Aldenhoven, DE
Ralf Schafer · Marbach, DE
Leonardus U. E. Konings · Eindhoven, NL

Key dates

Filing date	Sep 5, 1995
Grant date	Apr 7, 1998
Priority date	—
Expiry date	Sep 5, 2015

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/82
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The capped high pressure discharge lamp includes a light source (1) having a lamp vessel (1') with a first neck shaped portion (2) to which a lamp cap (30) is fixed. A connection conductor (7) runs alongside the discharge vessel to connect a second current supply conductor (5) extending from a second neck shaped portion (3) to a second contact member (36) of the cap. The lamp vessel (1') is contained by a tubular outer envelope (20), which is filled with air and does not envelope the connection conductor (7). The outer envelope (20, 50) has a narrowing portion (21, 52, 51) which encloses the second current supply conductor (5) or a neck shaped portion (2, 3). The outer envelope is maintained. The lamp is of a simple construction which allows for optimizing the light output or the temperature of the lamp vessel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.