device at a braennare foer automatic aatertaendning of relict gaslaaga

摘要

PCT No. PCT/SE92/00854 Sec. 371 Date Sep. 13, 1993 Sec. 102(e) Date Sep. 13, 1993 PCT Filed Dec. 10, 1992 PCT Pub. No. WO93/12378 PCT Pub. Date Jun. 24, 1993.A device for automatic reignition of an extinguished gas flame in a burner. The burner (10) is connected to a gas source via a security valve (13) operated to its closed position by the action of spring means. By magnetic means the security valve can be kept in its open position under the influence of the EMF generated by a thermocouple (25) heated by the gas flame. An igniter (20,21) is activated by an electronic control arrangement (22) upon the latter detecting changes of a predetermined rate of change in the EMF generated by the thermocouple.