Glazing units

• US 5,059,458 A
• Filed: 08/09/1990
• Issued: 10/22/1991
• Est. Priority Date: 08/14/1987
• Status: Expired due to Fees

• Current Assignee: Pilkington PLC
• Original Assignee: Pilkington PLC
• Inventors: Goodall, David R.
• Primary Examiner(s): Robinson, Ellis P.
• Assistant Examiner(s): Loney, Donald J.
• Application Number:
  US07/565,198
• Time in Patent Office: 439 Days
• Field of Search: 428/34, 428/409, 428/432, 428/434, 428/212, 428/213, 428/215, 428/334, 428/336, 428/410, 428/469, 428/701, 428/702, 428/913, 52/171, 52/172, 52/788, 52/790, 156/107, 156/109
• US Class Current: 428/34
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3613 Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/3652 the coating stack containing at least one sacrificial layer to protect the metal from oxidation
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: E06B 3/6715 specially adapted for increased thermal insulation or for controlled passage of light E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00
• CPC Class Codes: H05K 9/0005 Shielded windows
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]

Abstract

A double glazing unit comprising an outer pane of body colored heat absorbing glass and an inner pane of annealed glass with a coating including a silver layer having a thickness in the range 15 nm to 40 nm on its face turned towards the outer pane.

Claims

1. A double glazing unit comprising an at least partially toughened non-coated outer pane of body coloured heat absorbing glass being a glass which contains at least one heat absorbing metal oxide which colours the glass and which has, when in the form of a pane 6 mm thick, a heat absorption of at least 40%, and an inner pane of annealed glass with a coating including a silver layer having a thickness in the range 15 nm to 40 nm on its face turned towards the outer pane.

2. A double glazing unit according to claim 1 comprising an outer pane of 6 mm thick body coloured heat absorbing glass having a solar heat absorption in the range 45% to 55%.

3. A double glazing unit according to claim 1 wherein the inner pane of annealed glass is of clear float glass and has a light transmission higher than its total solar heat transmission.

4. A double glazing unit according to claim 1 wherein the thickness of silver layer in the coating on the inner pane in the range 20 nm to 30 nm.

5. A double glazing unit according to claim 1 wherein the coating on the inner pane comprises a silver layer sandwiched between two metal oxide layers.

6. A double glazing unit comprising an at least partially toughened non-coated outer pane of body coloured heat absorbing glass, being a glass which contains at least one heat absorbing metal oxide which colours the glass and which has, when in the form of a pane 6 mm thick, a heat absorption of at least 40%, and an inner pane of annealed clear float glass with a coating including a silver layer having a thickness in the range 15 nm to 40 nm on its face turned towards the outer pane, the inner pane having a light transmission higher than its total solar heat transmission.

7. A double glazing unit according to claim 6 comprising an outer pane of 6 mm thick body coloured heat absorbing glass having a solar heat absorption in the range 45% to 55%.

8. A double glazing unit according to claim 6 wherein the thickness of silver layer in the coating on the inner pane in the range 20 nm to 30 nm.

9. A double glazing unit according to claim 6 wherein the coating on the inner pane comprises a silver layer sandwiched between two metal oxide layers.

10. A double glazing unit comprising an at least partially toughened non-coated outer pane of body coloured heated absorbing glass, being a glass which contains at least one heat absorbing metal oxide which colours the glass and which has, when in the form of a pane 6 mm thick, a heat absorption of at least 40%, and an inner pane of annealed clear float glass with a coating including a silver layer having a thickness in the range 20 nm to 30 nm on its face turned towards the outer pane.

11. A double glazing unit according to claim 10 comprising an outer pane of 6 mm thick body coloured heat absorbing glass having a solar heat absorption in the range 45% to 55%.

12. A double glazing unit according to claim 10 wherein the coating on the inner pane comprises a silver layer sandwiched between two metal oxide layers.