High-pressure series arc discharge lamp construction

US5028845A · kind A · utility

Assignee

• North American Philips Corporation · US

Inventors

• Jagannathan Ravi · Elmira, US
• Kenneth E. Pearson · Shingle Springs, US
• Jay J. Palmer · Hornell, US
• Ronald C. Marburger · Ekeren, BE
• John P. Dunn · Horseheads, US
• Kent Collins · Stuart, US
• Dale E. Brabham · Elmira, US
• Kathleen P. Bernard · Corning, US
• Herbert Bayne · Hornell, US
• John Alderman · Cork, IE
• Kris Aelterman · Hoboken, BE

Key dates

• Filing date: Dec 21, 1989
• Grant date: Jul 2, 1991
• Expiry date: Dec 21, 2009

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05B41/042
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A 1000 watt arc discharge arc tube assembly comprises two series connected side-by-side arc discharge tubes whose combined break down voltage in sufficient for a standard 2-5 kv starting pulse to simultaneously start both arc tubes without additional structure. A standard ballast, starter and fixture can be used with the arc tube assembly whose overall length is less than 300 millimeters. The lamps are spaced sufficiently apart to preclude detrimental heat transfer effects on one another and sufficiently close to act as a single source of light in standard fixtures normally employing lamps having a single discharge tube.