Patent ID: 6294861
Filing Date: 2001-09-25
Classification: H01J

Abstract:
An electric discharge lamp apparatus comprising:an arc tube having a glass bulb, in which electrodes are opposite to each other, and an ultraviolet-ray shielding globe for surrounding and shielding the glass bulb;an insulating plug having a focusing ring, wherein the insulating plug is made of synthetic resin;a metal lead support forwardly extending over the insulating plug, for supporting a front end of the arc tube; anda metal support member secured to the insulating plug and arranged to support a portion of the arc tube adjacent to a rear end of the globe, wherein the metal support member includes,a metal base plate secured to the insulating plug and forming a reference plane running parallel to the focusing ring, anda vertically-holding member made of metal, joined integrally with the metal base plate and vertically holding an electrically-discharging axis of the arc tube with respect to the reference plane of the metal base plate.