Patent · US Expired

Flame-monitoring device

US7046154B2 · kind B2 · utility

0Cited by

2References

10Claims

0Family size

Assignee

SIEMENS BUILDING TECHNOLOGIES AG · CH

Inventors

Klaus Bott · Ludwigshafen, DE
Alexander Diebold · Rastatt, DE
Jurgen Hoffmann · Untersiggenthal, CH
Reiner Kind · Rastatt, DE

Key dates

Filing date	May 22, 2002
Grant date	May 16, 2006
Priority date	—
Expiry date	Jun 26, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF23N5/26
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

The invention relates to a flame-monitoring device in which an a.c. input voltage (U1) is limited to a voltage limit (U2) by means of a voltage limiter (4). Said voltage limit (U2) is applied to a flame sensing device (7) which operates by means of the rectifying effect of a flame, and through which a current (i) flows, especially when a flame (6) is present. An asymmetric voltage limit (U2) can be defined by said voltage limiter (4), said limit being then applied to the sensing device (7).

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