Patent · US Expired

Lamp and base assembly, particularly for association with an automotive head lamp reflector

US4789920A · kind A · utility

5Cited by

3References

20Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

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

Key dates

Filing date	May 27, 1987
Grant date	Dec 6, 1988
Priority date	—
Expiry date	May 27, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH01J5/56
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To permit use of materials having different melting temperatures and still rovide a two-component base for a lamp operating at high temperature, for example a halogen incandescent lamp, the base includes a base cup (5) of high heat-resistant plastic material, connected to an attachment element (13) by interengaging snap-in spring fingers (15) and recesses (9,10). To prevent separation of the attachment element from the base cup, the spring fingers are located inside of a solid wall portion of the attachment element and the base cup is formed with projections (8, 11) for example a circumferential flange or bead, extending over the spring fingers when they are snapped into matching recesses formed in the base cup so that, after assembly, the connection cannot be loosened, either inadvertently or deliberately.

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