Patent · US Expired

Accessory circuit structure for a low-pressure discharge lamp, typically fluorescent lamp

US4656395A · kind A · utility

4Cited by

8References

6Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Hans-Jurgen Fahnrich · Munich, DE
Erhard Rasch · Ottobrunn, DE

Key dates

Filing date	Sep 23, 1985
Grant date	Apr 7, 1987
Priority date	—
Expiry date	Sep 23, 2005

Classification

Technology area (CPC H)Electricity
CPC primaryH05K1/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To facilitate assembly of tiny cores used in accessory circuitry for a flescent lamp, bases of two transistors (20, 20') are connected to inductive windings on a core (2) which is retained by a primary winding (3) on the printed circuit (PC) board (1). The windings connected to the bases are formed by U-shaped wires surrounding the core which--preferably--is a toroidal core. The windings may include a resistor (8, 8') located within the toroidal core to heat quickly and, also, heat the core, the resistor extending at right angles to the PC board and forming one leg of the U-shaped conductor legs forming the impedance winding around the core.

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