Patent · US Expired

Circuit for triggering warning lamps

US5631626A · kind A · utility

2Cited by

3References

2Claims

0Family size

Assignee

ITT Automotive Europe GmbH · DE

Inventors

Michael Zydek · Langgöns, DE
Wolfgang Fey · Niedernhausen, DE
Mario Engelmann · Rheinböllen, DE

Key dates

Filing date	Oct 2, 1995
Grant date	May 20, 1997
Priority date	—
Expiry date	Oct 2, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T2270/402
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A circuit for triggering warning lamps including a self-conductive transistor circuit with a triggering circuit connected to the supply voltages. The triggering circuit keeps the transistor circuit blocked if the supply voltages are proper. If voltage fails, the transistors of the self-conductive transistor circuit open a current path from the warning lamp terminal to the control terminal of the power driver which results in switching on of the power driver and, thus, of the warning lamp.

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