Patent · US Expired

Electric lamp with cementless attached base

US4295076A · kind A · utility

12Cited by

5References

12Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

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

Key dates

Filing date	Mar 20, 1979
Grant date	Oct 13, 1981
Priority date	—
Expiry date	Mar 20, 1999

Classification

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

Abstract

To permit insertion of a halogen cycle lamp into a standard bayonet or sc-in socket, the glass press stem of the lamp is connected to a standard base by a resilient spring disk formed with a circumferentially notched or serrated edge fitting into the lamp base, the spring disk being formed with a central opening into which the lamp press stem fits, the press stem having wedge-shaped projections thereon which engage behind tabs projecting from the spring disk. Additional projections may be formed on the lamp for engagement with further tabs on the disk for proper centering of the bulb.

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