Analytic description of the evolution of an axisymmetric flame surface

PCT No. PCT/EP86/00681 Sec. 371 Date Aug. 4, 1987 Sec. 102(e) Date Aug. 4, 1987 PCT Filed Nov. 26, 1986 PCT Pub. No. WO87/03714 PCT Pub. Date Jun. 18, 1987.A plurality of control rods (41, 43, and 42, 44) extend transversely of a locking plate (3) through which at least three of the control rods are locked in a neutral position by cammed displacement of the locking plate in response to axial displacement of another of the control rods from the neutral position. Locking grooves (45) in the control rods are aligned in the neutral position and the rods are engaged therein by locking edges (31, 32) formed on the locking plate facing opposite directions for either cammed displacement of the locking plate or locking of the rods. The locking plate is displaceable within a housing (11) along a path transverse to the control rods and about a pivot axis (52) fixed to the housing.