(57) Electric lamp (1) with improved cap fixation, comprising a light emitting member
and current conductors connected thereto and a glass envelope (2) having a substantially
cylindrical neck-shaped end portion (5) over which an end portion of a metal lamp
cap (8) comprising a cylindrical and a screwthreaded portion connected by a conical
intermediate portion is arranged. Along two opposite generatrices of the neck-shaped
portion (5), two elongated recesses (7, 7'), one in each opposite position and extending
over the neck portion (5) formed to accept the metal lamp cap (8) are provided and
the neck-shaped portion (5) is also provided with an annular recess (6), over the
neck-shaped portion (5) a metal lamp cap (8) is slid, the cylindrical portion of the
metal lamp cap (8) is provided with a pair of elongated rib type elements (9, 9')
engaging in the elongated recesses (7, 7') of the neck-shaped portion (5) and in the
cylindrical portion of the metal lamp cap (8) engaging lugs (11, 11') are formed from
the pair of strip-like portions (10, 10') determined by two pairs of adjacent slots
(12) made in the cylindrical portion of the metal lamp cap (8) and the lugs (11, 11')
fit the annular recess (6) in positions opposite to each other.
|
|
