Patent · US Expired

Electric lamp bulb attachment arrangement

US4795939A · kind A · utility

8Cited by

5References

17Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Fritz Eckhardt · Gerstetten, DE
Peter Helbig · Sontheim, DE
Walter Schonherr · Giengen an der Brenz, DE

Key dates

Filing date	Jan 21, 1987
Grant date	Jan 3, 1989
Priority date	—
Expiry date	Jan 21, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH01K1/46
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To permit connection of a high temperature resistant plastic material forg a bulb holder element (4, 15, 20) to which a light bulb (1, 14, 19) is attached in the tubular opening of the base structure (5, 16), the bulb holder element is essentially barrel-shaped to permit alignment of the bulb with respect to the base structure, and subsequent connection by welding together the plastic base structure with the plastic bulb holder element by exposure to a high-frequency field. To cause melting of the plastic, ferromagnetic material, typically a nickel-iron alloy, is located between the bulb holder element and the base structure, for example in form of a ring (11) snapped into a groove (12) formed on the holder element.

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