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Arrangement for heating an automobile glazing unit

  • US 5,824,993 A
  • Filed: 05/04/1995
  • Issued: 10/20/1998
  • Est. Priority Date: 05/04/1995
  • Status: Expired due to Fees
First Claim
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1. An arrangement comprisinga glazing unit having a lower sectionan electrically resistant grid pattern in thermal contact with an area of the lower section of the glazing unit, the grid pattern having a plurality of horizontally spaced resistance heating conductors;

  • bus bars disposed along and electrically connecting opposite edges of each of the heating conductors with the bus bars being connected to a power source to provide current flow through the bus bars and the heating conductors; and

    a set of vertically spaced shorting bars electrically intersecting at least two of the heating conductors at respective points having equal voltage potentials and having an absence of current flow through the vertically spaced shorting bars upon the power source providing current flow through the bus bars and the heating conductors, each vertically spaced shorting bar having an insignificant resistivity as compared to the heating conductors such that insignificant heat is generated upon current flow through each shorting bar as compared to heat generated by each heating conductor.

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