Patent · US Expired

Lamp with a mechanical base

US6469428B1 · kind B1 · utility

12Cited by

7References

1Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Joachim Thiel · Neustadt, DE
Ernst Muehlich · Berlin, DE
Dieter Trypke · Falkensee, DE

Key dates

Filing date	Dec 6, 1999
Grant date	Oct 22, 2002
Priority date	—
Expiry date	Dec 6, 2019

Classification

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

Abstract

A lamp bulb (1) made from glass is sealed at one end by a pinch (2). A base (5) is fastened on the pinch (2) by means of a metal spring (6). The base (5) has a holder (7) loosely adapted to the pinch (2). The metal spring (6; 26) is bent in a U-shaped fashion and comprises a base part (11) and two limbs (12, 13) which embrace the pinch, the fastening of the base (5) being accomplished by virtue of the fact that one limb (12) is aligned essentially parallel to the longitudinal axis, but simultaneously has a transverse extent accessible to spring forces, the transverse extent of this limb being stressed by the holder (7) of the base.

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