Lamp with an unpolished surface and radiant source lamps with a transparent cover for the radiant source

US6629768B2 · kind B2 · utility

Assignee

• Schott Glas · DE

Inventors

• Sabine Melson · Mainz, DE
• Peter Nass · Mainz, DE

Key dates

• Filing date: Apr 6, 2001
• Grant date: Oct 7, 2003
• Expiry date: Sep 15, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J61/35
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A lamp with an unpolished surface is herein described. The lamp comprises a closed body which comprises a source of light adapted to be connected to a source of power, contacts to connect said source of light to a source of power, and a cover. The cover is configured and disposed to permit light to exit the lamp when connected to a source of power. The cover comprises an inner surface facing the interior of the lamp and an outer surface facing away from the lamp. At least the outer surface facing away from the lamp comprises unpolished glass configured to provide the unpolished surface. The unpolished glass of the outer surface comprises a surface having a roughness which is minimized.