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A turbine ring made up of an assembly of a plurality of sectors forming the outer shroud of the rotor of said turbine. The sectors are united end to end with interposed sealing systems comprising tongues housed in slots, said tongues being rectilinear and engaged in respective rectilinear slots in t

A turbine ring made up of an assembly of a plurality of sectors forming the outer shroud of the rotor of said turbine. The sectors are united end to end with interposed sealing systems comprising tongues housed in slots, said tongues being rectilinear and engaged in respective rectilinear slots in the radial faces of said sectors.

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What is claimed is: 1. A turbine ring forming a rotor shroud, the ring comprising a plurality of sectors, each sector having an inside face in contact with a stream of hot gas, said sectors being interconnected end to end with interposed sealing systems comprising tongues extending between adjacent

What is claimed is: 1. A turbine ring forming a rotor shroud, the ring comprising a plurality of sectors, each sector having an inside face in contact with a stream of hot gas, said sectors being interconnected end to end with interposed sealing systems comprising tongues extending between adjacent sectors, said tongues being housed in slots formed facing each other in adjacent radial faces of said sectors, wherein each sealing system includes rectilinear tongues engaged in respective rectilinear slots in said radial faces, and wherein the slots formed in each radial face are independent such that said slots do not communicate with each other, wherein each sealing system between two sectors comprises first and second tongues, and wherein said second tongue extends from a first end point situated close to an outlet edge of each sector, towards the inside, to a second end point situated close to said first tongue, said second end point being substantially between the middle of said first tongue and a two-thirds point starting from an end point of said first tongue close to an inside face of said sector. 2. A turbine ring according to claim 1, wherein each sealing system between two sectors comprises first and second tongues extending in a chevron configuration from the insides of said radial faces, said tongues being engaged in slots in said radial faces defining their relative positions. 3. A turbine ring according to claim 2, wherein each sealing system includes a third tongue extending substantially from one end to the other of the adjacent sectors, parallel to the axis of the ring, and on the outside of said radial faces. 4. A turbine ring according to claim 3, wherein said first tongue extends between a point situated close to an inlet edge of each sector, towards the inside, and a point situated close to said third tongue. 5. A turbine ring according to claim 4, wherein the angle defined by the directions of said first and third tongues lies in the range 15° to 70°. 6. A turbine ring according to claim 1, wherein the facing slots of two adjacent radial faces of said sectors house a single tongue. 7. A turbine, including a ring according to claim 1. 8. A turbine ring according to claim 1, wherein said first and second tongues extend in a chevron configuration from the insides of said radial faces, said tongues being engaged in slots in said radial faces defining their relative positions. 9. A turbine ring according to claim 1, wherein each sector comprises an outer face, opposed said inside face, wherein said tongues are between said inner and outer faces. 10. A turbine ring according to claim 9, wherein each sealing system between two sectors comprises first, second and third tongues, said third tongue extending substantially parallel to said outer face, and said first and second tongues being located between said third tongue and said inner face. 11. A turbine ring forming a rotor shroud, the ring comprising a plurality of sectors interconnected end to end with interposed sealing systems comprising tongues extending between adjacent sectors, said tongues being housed in slots formed facing each other in adjacent radial faces of said sectors, wherein each sealing system includes rectilinear tongues engaged in respective rectilinear slots in said radial faces, and wherein the slots formed in each radial face are independent such that said slots do not communicate with each other, wherein each sealing system between two sectors comprises first and second tongues extending in a chevron configuration from the insides of said radial faces, said tongues being engaged in slots in said radial faces defining their relative positions; and wherein said second tongue extends from a first end point situated close to an outlet edge of each sector, towards the inside, to a second end point situated close to said first tongue, said second end point being substantially between the middle of said first tongue and a two-thirds point starting from an end point of said first tongue close to an inside face of said sector. 12. A turbine ring according to claim 11, wherein each sector having an inside face in contact with a stream of hot gas. 13. A turbine ring forming a rotor shroud, the ring comprising a plurality of sectors interconnected end to end with interposed sealing systems comprising tongues extending between adjacent sectors, said tongues being housed in slots formed facing each other in adjacent radial faces of said sectors, wherein each sealing system includes rectilinear tongues engaged in respective rectilinear slots in said radial faces, and wherein the slots formed in each radial face are independent, wherein each sector includes a cooling air flow cavity, wherein each sector includes air ejection channels extending between said cavity and at least one radial face of said sector, said channels opening out in said radial face between an inside edge thereof and said first and second tongues. 14. A turbine ring according to claim 13, wherein at least some of the channels extend substantially perpendicularly to said radial face. 15. A turbine ring according to claim 13, wherein the orifices of said channels are disposed in a row parallel to the axis of the ring. 16. A turbine ring according to claim 15, wherein channels situated at the ends of said row are formed at an angle and diverge relative to the other channels on going from the cavity towards the radial face. 17. A turbine ring according to claim 13, wherein each sealing system between two sectors comprises first and second tongues extending in a chevron configuration from the insides of said radial faces, said tongues being engaged in slots in said radial faces defining their relative positions. 18. A turbine ring according to claim 17, wherein each sealing system includes a third tongue extending substantially from one end to the other of the adjacent sectors, parallel to the axis of the ring, and on the outside of said radial faces. 19. A turbine ring according to claim 18, wherein said first tongue extends between a point situated close to an inlet edge of each sector, towards the inside, and a point situated close to said third tongue.