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US 6,472,818 B1Granted
Light bulb
AssigneeMatsushita Electronics Corporation
InventorsTaku Ikeda, Kazuo Maeda
Life of this patent
Estimating the term…
Abstract
Providing a light bulb having a long life by preventing filament coil breakage. A glass bulb (1) has a sealing portion (4) at one end thereof and contains a filament coil (5). The filament coil (5) is suspended between lead-in wires (7, 8) extended externally of the sealing portion (4), with its opposite ends connected to respective one ends of the wires. The lead-in wires (7, 8) are supported by a stem (6) disposed between the sealing portion (4) and the filament coil (5). A getter (9) is disposed between the sealing portion (4) and the stem (6).
Claims10
A light bulb comprising:
- a sealing portion at one end thereof and containing a pair of lead-in wires extending externally of said sealing portion,
- a filament coil-suspended between the pair of lead-in wires, and
- a stem interposed between the filament coil and the sealing portion and supporting the pair of lead-in wires, wherein
- a getter is between the sealing portion and the stem and is not in a plane defined by the pair of lead-in wires.
1 more element
Dependencies are inferred from the claim text.