Light transmitting panel with sound damping properties

US4019295A · kind A · utility

Assignee

• BFG Glassgroup · FR

Inventors

• Paul Derner · Gelsenkirchen, DE
• Hans-Dieter Sonntag · Würselen, DE
• Otto Stehl

Key dates

• Filing date: Sep 16, 1975
• Grant date: Apr 26, 1977
• Expiry date: Sep 16, 1995

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E06B3/6707
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A light transmitting panel composed of at least two panes held in spaced relation by a spacer assembly to define at least one space between panes is given improved sound damping properties by giving such space a thickness of greater than 9mm, by causing the space between panes to be sealed from the external atmosphere, and by filling this space with a gaseous medium composed of air and at least one other gas, the air constituting at least 30%, by volume, of the medium, and whose composition is such that the velocity of sound propagation therethrough differs by at least 5% from that in dry air at the same pressure and temperature as the medium.