also on the inner casing wall 6 u2032 of the ring they extend over a segment of the whole circumference in each case seals which prevent hot gas getting into the combustion chamber casing 6 are attached between the individual protective elements 8 a cavity 12 through which flows the cooling air flow is located between combustion chamber casing wall 6 and protective elements 8 the seal 19 can extend from the front casing 7 to the protective elements 8 wherein the bristles are orientated at an angle to the radial direction the seal 19 is installed in segmented fashion as a result a single sealing segment 19 u2032 is in contact with at least two adjacent thermal protective elements 8 the transition from one brush seal element 19 u2032 to the next brush seal element 19 u2032 is almost seamless as a consequence and can be located approximately at the height of the middle of a thermal protective element 8 the transitions can basically be positioned at any point with regard to the protective elements including at points between two adjacent protective elements fig4 shows a further detail according to iv in fig3 the detail shows the orientation of the bristles of the brush seal 19 with regard to the radial direction of the combustion chamber the bristles are inclined from the radial in the direction of the circumferential tangent by an angle u03b1 in any range for example in a range of 40 50 u00b0 an inclination of the bristles away from the radial and towards the circumferential tangent results in the interface being reliably sealed and uniformly sealed over the circumference even with large fluctuations of the distance between the front casing circumference 7 and the thermal protective element 8 as a result of this cooling.