Ignition devices

Abstract

Abstract 1,075,321. Ignition systems. LABORATOIRE D'ELECTRONIQUE ET D'AUTOMATIQUE DAUPHINOIS (L.E.A.D.), and APPAREILLAGE THERMOFLEX, ETABLISSEMENTS J.M. DARD. March 23, 1965 [March 24, 1964], No. 12257/65. Heading F1B. An ignition device for igniting gas or oil burners comprises an arc gap member 11 placed in the vicinity of a burner to be ignited and fed on the one hand by an alternating low voltage source 12 and on the other hand by a high voltage pulse generator which is itself fed by the alternating voltage source and means dispersed between the member and the source for isolating the source from the high frequency current components of the arcs produced across the element. The isolating means may comprise at least one high frequency choke coil 16 in series between one electrode of the arc gap member and one terminal of the low voltage source and a filter capacitor 15 may be connected in series with the choke. The isolating means may comprise a second high frequency choke coil and a second filter capacitor between the other electrode of the arc gap member and the other terminal of the low voltage source. A switch may be provided for disconnecting the alternating voltage source from the pulse generator after current has flowed through the member for a predetermined period of time. Reference is made to delayed action by electric, electro-hydraulic or electro-pneumatic relay. In Fig.4 (not shown) ionization causes the resistor of the blade 36 to continue to be traversed, even when no arc is present across the gap 11, by a small current capable of generating sufficient heat to cause the blade 36 to close the switch 35 and open the switch in series with the primary winding 17. It is stated that the capacitors 15 may be replaced by resistances whose self-inductances block the high frequency components.

Inventors

• 👤 Mayer Ferdy

Bibliographic Details