Patent · US Expired

High-pressure discharge lamp, and method of its manufacture

US4754195A · kind A · utility

2Cited by

8References

11Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Erhard Rasch · Ottobrunn, DE
Jurgen Heider · Munich, DE
Werner Eisele · Olching, DE

Key dates

Filing date	Dec 29, 1986
Grant date	Jun 28, 1988
Priority date	—
Expiry date	Dec 29, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/827
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To improve the high-voltage flash-over characteristics of high-pressure dharge lamps (1), and especially to prevent flash-over between terminal leads emanating from the lamp bulb and extending into a lamp base (14), the lamp base which is formed with a cup-shaped opening (13) has an insert pad (18) placed therein of fibrous web, pile, fleece or mat material, made of ceramic, quartz or glass fibers. In manufacture, the fibers are compressed, thereby fitting tightly against the terminal end, typically a pinch or press seal, of the discharge lamp bulb, and thereby substantially increasing the high voltage flash-over resistance between the terminal leads and permitting hot re-ignition of the lamp, which may require pulses of between 15 to 20 kV.

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