Light transmitting panel

US4047351A · 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: Sep 13, 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 employing panes which exhibit at least two different masses per unit surface area, by causing the space between panes to be sealed from the external atmosphere, and by filling this space with a gaseous medium whose composition is such that the velocity of sound propagation therethrough is different from that in dry air at the same pressure and temperature as the medium.