Discharge lamps.

摘要

High pressure discharge lamps have discharge tubes (1) of ceramic material having end caps (4) into which electrodes (8) are mounted on fixed shanks (7). The invention provides a preferred construction for mounting on electrode shank (7) or an external conducting member (11) in a cermet end cap (4). A metal coil (10 or 11) is fixed in a respective opening in the end cap and supports the respective shank or conductor therein. Preferably the cermet is pressed into the desired shape with an aperture in it. The coil is inserted into the aperture so that after sintering the coil is fixed into the sintered cermet.