Patent ID: 6011353
Filing Date: 2000-01-04
Classification: H01J,H01K

Abstract:
A single ended, quartz projection lamp comprising:an envelope hermetically sealed to define an inner chamber housing a filament, the filament having first and second ends extending through the hermetic seal, the envelope including a raised portion defining a stop;a ceramic base having an envelope receiving slot which receives a portion of the hermetic seal therein with a pair of holes extending from the slot through the ceramic base, an edge of the slot defining a shoulder that abuttingly engages the stop to precisely locate the filament relative to the base and to define a predetermined light center length from a center of the filament to the bottom of the base;leads electrically connected to and extending from the first and second ends of the filament, respectively, into and through the ceramic base where an exposed portion of each lead is directly connectable to a power source; andcement fill in the envelope receiving slot around the seated hermetic seal of the envelope for bonding the envelope to the base.