Patent · US Expired

Capped electric lamp

US5654608A · kind A · utility

5Cited by

3References

11Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Manfred Westemeyer · Aldenhoven, DE
Hans J. Kohl · Yellandu, IN
Ralf Schafer · Marbach, DE

Key dates

Filing date	Dec 21, 1995
Grant date	Aug 5, 1997
Priority date	—
Expiry date	Dec 21, 2015

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/34
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The capped electric lamp has a glass lamp vessel (1) having first and second neck-shaped portions (2,3). An outer glass envelope (8) has a narrowed portion (9) where it is coupled to the first neck-shaped portion (2). A metal sleeve (10) has a clamping zone (11) which clampingly holds the outer envelope (8), and a welding zone (12) to which tongues (21) of a fixation member (20) which is fixed in a lamp cap (30) are welded. The metal sleeve (10) becomes narrower from the clamping zone (11) towards the first neck-shaped portion (2) up to the welding zone (12).

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