Multiple-glazed heated window

• US 4,733,504 A
• Filed: 11/26/1986
• Issued: 03/29/1988
• Est. Priority Date: 12/05/1983
• Status: Expired due to Fees

• Current Assignee: Termofrost Sweden AB
• Original Assignee: Termofrost Sweden AB
• Inventors: Lindgren, Bengt
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/935,131
• Time in Patent Office: 489 Days
• Field of Search: 52/1, 52/171, 52/172, 219/213, 219/522
• US Class Current: 52/1
• 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: F24D 13/026 in door, windows
• CPC Class Codes: G05D 23/1909 whose output amplitude can only take two discrete values
• CPC Class Codes: G05D 23/24 the sensing element having a resistance varying with temperature, e.g. a thermistor
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A window for buildings, particularly dwelling houses and office buildings, comprising a frame and two or more glass window-panes, of which the window-pane located nearest a room has an electrically conductive layer applied to the side thereof remote from the room. In accordance with the invention there is provided a control circuit (8) for connection to a voltage source located in the frame (2) of the window (1). Also provided is a thermistor (14) which is in contact with the side of the window-pane (3) remote from the room and which is connected to the aforementioned control circuit (8) and arranged to produce or to influence an electric signal corresponding to the temperature of the window pane (3). The control circuit (8) is arranged to control the supply of current to the electrically conductive layer so that the window-pane (3) can be brought to a given temperature set by a potentiometer (16) connected to the control circuit (8).

Claims

1. A window for buildings, particularly dwelling houses and office buildings, comprising:

a frame and at least two window panes;

a first of said panes, the window pane on the side of the window which is intended to be located nearest the interior of a room, includes, applied directly on the surface of said side of said first pane remote from the room, an electrically conductive layer;

a control circuit (8) for connection to a voltage source is mounted in the frame (2) of the window (1);

a thermistor (14) is mounted between two of said panes in direct contact with the surface of said side of said first pane (3) intended to face away from the room, said thermistor (14) being connected to said control circuit (8) and being arranged in said circuit to produce an electric signal condition corresponding to the temperature of said first window-pane (3);

said control circuit (8) includes a potentiometer and is arranged to supply and control the current to said electrically conductive layer so that said first window pane (3) can be brought to a given temperature as set by said potentiometer (16); and

a second of said window panes (4,5), located toward and closer to the side of the window (1) intended to be located exterior of the room than is said first window pane (3) which carries the electrically conductive layer, having an infra-red reflecting layer (37) applied on the surface thereof facing said first pane and intended to face toward the interior of a room in which the window is to be installed.

2. A window according to claim 1, characterized in that the control circuit (8) includes and is connected to heating cables (23,24) which abut the part of the frame (2) located nearest the room, and in that the control circuit (8) is arranged to apply voltage to the heating cables (23,24) for the time period over which a voltage is applied to the electric layer on said window-pane (3).

3. A window according to claim 1, characterized in that the control circuit (8) is designed to incorporate a current-sensing means arranged to sense whether or not current flows through said window-pane (3) when voltage is applied to collecting conductors (6,7) associated with said electric layer, said current-sensing means being arranged to increase the current strength through a conventional porcelain fuse (25), on which a pair of bi-polar electric conductors (26,27) are connected, when current does not flow through the electric layer.