Fastening system and lamp having a fastening system

1. A fastening system for fastening a lamp, having at least one electrical source of radiant light, in place in a light system, part of the lamp projecting into an opening in the light system and the said part of the lamp being releasably connected by a lug and lug-receptacle system that comprises at least three lugs and three corresponding lug-receptacles, wherein at least three lugs take the form of electrical contacts and reference points, and the areas of contact of the lug and lug-receptacle system are so arranged that, in the end position, their mating areas can be caused to mate in positive interengagement by an axially applied force substantially parallel to a longitudinal axis of the lamp, and wherein the axially applied force is a self-restoring force from a sealing ring or from a resilient clamping ring.

2. The fastening system of claim 1 , wherein one of the at least three lugs is wider than remaining of the at least three lugs.

3. The fastening system of claim 1 , wherein the at least three lugs extend from a top part of a flange attached to a cap of the lamp, the at least three lugs extending in a radially outwards direction which is substantially perpendicularly to the longitudinal axis of the lamp.

4. The fastening system of claim 3 , wherein the at least three lugs have a substantially semi-circular outline shape that converges towards a bottom part of the flange.

5. The fastening system of claim 1 , wherein the at least three lugs have a substantially semi-circular outline shape that converges towards a bottom part of a flange of a cap of the lamp.

6. The fastening system of claim 5 , wherein the three corresponding lug-receptacles include first portions having the substantially semi-circular outline shape, and second portions having auxiliary elements of a ramp-like form that extend from the first portions.

7. A lamp for a light system, comprising at least

a lamp envelope in which at least one electrical source of radiant light is enclosed and from which at least two current supply means project,

a lamp cap that has at least one sealing ring and one cap part to which the lamp envelope is fastened at the lamp cap, and

fastening elements belonging to a lug and lug-receptacle system,

wherein the fastening elements of the lug and lug-receptacle system of the lamp comprise at least three lugs whose mating areas can be applied, by an axially applied force which is substantially parallel to a longitudinal axis of the lamp, to mate in positive interengagement with the mating areas of other fastening elements of the lug and lug-receptacle system that are not arranged on the lamp, and

wherein at least three of these lugs are in the form of electrical contacts and reference points, and

wherein the axially applied force is a self-restoring force from a sealing ring or from a resilient clamping ring.

8. The lamp as claimed in claim 7 , wherein the lug and lug-receptacle system has three lugs and three corresponding lug-receptacles.

9. The lamp of claim 7 , wherein one of the at least three lugs is wider than remaining of the at least three lugs.

10. The lamp of claim 7 , wherein the at least three lugs extend from a top part of a flange attached to a cap of the lamp, the at least three lugs extending in a radially outwards direction which is substantially perpendicularly to the longitudinal axis of the lamp.

11. The lamp of claim 10 , wherein the at least three lugs have a substantially semi-circular outline shape that converges towards a bottom part of the flange.

12. The lamp of claim 7 , wherein the at least three lugs have a substantially semi-circular outline shape that converges towards a bottom part of a flange of a cap of the lamp.

13. The lamp of claim 12 , wherein the three corresponding lug-receptacles include first portions having the substantially semi-circular outline shape, and second portions having auxiliary elements of a ramp-like form that extend from the first portions.

14. A lamp for a light system, comprising:

a lamp envelope in which at least one electrical source of radiant light is enclosed;

a lamp cap attached to the lamp envelope and having a flange comprising at least three lugs having lug mating areas;

a reference ring comprising receptacle mating areas; and

a sealing ring located at an end the reference ring remote from the lamp cap;

wherein the lug mating areas mate with the receptacle mating areas in positive interengagement by an axially applied force substantially parallel to a longitudinal axis of the lamp, and wherein the axially applied force is a self-restoring force from the sealing ring.

15. The lamp of claim 14 , wherein the sealing ring is located in a groove of the end of the reference ring remote from the lamp cap

16. The lamp of claim 14 , wherein one of the at least three lugs is wider than remaining of the at least three lugs.

17. The lamp of claim 14 , wherein the at least three lugs extend from a top part of the flange, the at least three lugs extending in a radially outwards direction which is substantially perpendicularly to the longitudinal axis of the lamp.

18. The lamp of claim 14 , wherein the at least three lugs have a substantially semi-circular outline shape that converges towards a bottom part of the flange.

19. The lamp of claim 18 , wherein the three corresponding lug-receptacles include first portions having the substantially semi-circular outline shape, and second portions having auxiliary elements of a ramp-like form that extend from the first portions.

20. The lamp of claim 14 , wherein at least one lug of the at least three lugs is in a form of an electrical contact and a reference point.