Patent ID: 6583541
Filing Date: 2003-06-24
Classification: H01K

Abstract:
Filament lamp with bases, comprising:a tubular bulb with a pinch seal area formed on each end, the pinch seal area being flattened so as to form a wide crimped foot surface; a filament which is located within the bulb along a longitudinal axis of the tubular bulb; outer leads, each of which is electrically connected at an inner end to a respective end of the filament and projects out of respective pinch seal area; plate-shaped terminals, each of which electrically connects an outer end of a respective one of the outer leads to a feed line; and bases made of a ceramic material for protection of the plate-shaped terminals; wherein each ceramic base has a concave holding part on one side for holding of the respective pinch seal area and a first opening into which the respective outer lead is inserted, and on an opposite side, has a second opening into which the respective plate-shaped terminal is inserted; wherein a through opening is located between the first opening and the second opening for enabling the outer lead and the plate-shaped terminal to be welded to one another in a direction which orthogonally intersects a lengthwise direction of the base and orthogonally intersects the wide crimped foot surface of the pinch seal area in the holding part; and wherein the respective plate-shaped terminal has a flat planar surface which is larger than the first opening of the base and is welded to the outer lead with a flat plane thereof parallel to the wide crimped foot surface of the pinch seal area.