Patent ID: 7439662

Claim:
An electric lamp with a base at one end, the lamp being a high pressure discharge lamp, having an inner vessel ( 2 , 3 ) with a vacuum-tight seal, said vessel being surrounded by an outer jacket ( 24 ), a base with electric connections supporting the inner vessel, on the one hand, and the outer jacket, on the other hand, characterized by the combination of the following features: a) the base has a base insulator ( 12 ) that is produced from an insulating material and has a central opening ( 11 ) with a surrounding collar ( 13 ; 63 ) in which the inner vessel is held without cement; b) the base insulator has a fastening means for the outer jacket, the means being a circular, radially projecting segment with an associated upper and lower plateau with reference to the base; c) the outer jacket has an opening on the base side, there being located in the vicinity of the opening a means for fastening on the base insulator, in particular a radially projecting edge that has an upper and lower contact surface with reference to the base, the lower contact surface of the edge being compatible with the upper plateau of the circular, radially projecting segment on the base insulator; and d) the outer jacket is fastened on the base by means of a cementless mechanical holding mechanism with the inclusion of the means from b) and c).