2 on the tubing 3 the rectilinear strand 61 of the spring 60 engages into a radial groove 62 made in the end of the electrode 42 and remains applied in the bottom of this groove 62 so as to be able to drive the spring 60 into rotation on the electrically conducting washer 59 during rotation of the burner head 2 the assembly thus forming a rotating collector advantageously the end of the electrode may comprise two radial grooves at 90 u00b0 from each other by means of these arrangements and in particular by the compression of the spring between the rectilinear strand 61 and the washer 59 excellent electrical contact is obtained between the rectilinear strand 61 and the electrode 42 on the one hand between the metal washer 59 and the last grinded close turn of the spring 60 an alternative of this design in fig6 consists in replacing the aforesaid spring 60 by the spring 60 u2032 and the washer 60 u2033 including an axial maneuvering shape 60 u2032 u2033 connected to its peripheral portion through one or more connecting arms this maneuvering shape engages into or around the opposite shape 62 u2032 of the electrode 74 u2032 in order to be able to drive into rotation the washer 60 u2033 on the spring 60 u2032 bearing upon the electrically conducting washer 59 upon rotation of the burner head 2 the assembly thus forming a rotating collector the hot air generator burner described.