Patent ID: 7728260

Claim:
A warm window system comprising: an outside pane of glass; an inside pane of glass; a tin oxide layer that is disposed over substantially all of an inner surface of said inside pane of glass; at least one spacer having a predetermined modulus of elasticity that is disposed between said inside pane of glass and said outside pane of glass in a peripheral area, said inside pane of glass and said outside pane of glass being substantially aligned so that said inner surface of said inside pane of glass faces an interior portion of said warm window system; at least two buss bars placed in said interior portion of said warm window system between said at least one spacer and said inside pane of glass, said buss bars made from a metal strip that is folded along a length of said metal strip in at least one location, said metal strip having a size, shape and modulus of elasticity that, together with said predetermined modulus of elasticity of said at least one spacer, causes said buss bars to produce a sufficient amount of physical force directly on said inner surface of said inside pane of glass to conform to said tin oxide layer and create an electrical contact between said buss bars and said tin oxide layer on said inner surface of said inside pane of glass that is capable of carrying a sufficient current to warm said warm window system, and a sufficient amount of physical force to hold said buss bars in a substantially stationary position in said interior portion of said warm window system between said outside pane of glass and said inside pane of glass.