Global Patent Index - EP 0320082 A1

EP 0320082 A1 19890614 - Method and apparatus for a flame sensing digital primary safety control for fuel burning devices.

Title (en)

Method and apparatus for a flame sensing digital primary safety control for fuel burning devices.

Title (de)

Verfahren und Einrichtung für einen Flammendetektor mit digitaler, primärer Sicherheitskontrolle für Brennstoffapparate.

Title (fr)

Méthode et dispositif pour une détection de flamme à contrÔle numérique à sécurité primaire pour appareil à carburant.

Publication

EP 0320082 A1 19890614 (EN)

Application

EP 88305866 A 19880628

Priority

US 13006387 A 19871208

Abstract (en)

A flame sensing digital primary safety control for fuel burning devices and method therefor are disclosed. A photocell senses the presence or absence and the condition of the burner flame. A DC control signal for the primary safety control is generated under a "dark start" condition in the fuel burning device. Once proper ignition of the fuel has occurred, safety control is transferred to an AC "normal flame" signal that is obtained from the photocell. The use of an AC safety control signal provides a greater degree of safety for the fuel burning device because problems with the photocell, such as a shorting of the cell, produce a "fail safe" condition in contrast to a DC signal operated safety control.

IPC 1-7

F23N 5/08

IPC 8 full level

F23N 1/08 (2006.01)

CPC (source: EP)

F23N 1/082 (2013.01); F23N 2223/20 (2020.01); F23N 2227/36 (2020.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE ES FR GB GR IT LI LU NL SE

DOCDB simple family (publication)

EP 0320082 A1 19890614

DOCDB simple family (application)

EP 88305866 A 19880628