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US 6,659,829 B2Granted
Single-ended halogen lamp with IR coating and method of making the same
AssigneeFederal-Mogul World Wide, Inc.
InventorErnest C. Weyhrauch
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AssigneeFederal-Mogul World Wide, Inc.
InventorErnest C. Weyhrauch
Estimating the term…
A single-ended tungsten halogen lamp having a spherical or ellipsoidal envelope and an infrared reflective coating is manufactured using a mandrel alignment tool that radially centers an axially-oriented tungsten filament within the envelope. The manufacturing method includes forming the envelope in a glass tube. A filament assembly having an axially-oriented coiled tungsten filament is then placed into the interior of the envelope and the mandrel alignment tool is utilized to center the filament radially within the spherical or ellipsoidal envelope. The tool includes a tip that is inserted into the center of the tungsten coil to maintain the radial position of the filament during sealing of the glass tube around the filament assembly. After removing the tool, the glass tube is necked down and an inert halogen gas is placed within the envelope. The tube is then tipped off and the infrared reflective coating applied to form a completed bulb.
A method of making a single ended halogen lamp, comprising the steps of:
A method of making a halogen lamp having an axially-oriented filament, comprising the steps of:
A method of making a halogen lamp having an axially-oriented filament, comprising the steps of:
Dependencies are inferred from the claim text.