Electrically heated window

DETAILED DESCRIPTION It is, therefore, an important object of the present invention is to provide an electrically heated window wherein both of the electrical connection points of the electrical resistance element defogging and deicing system applied thereto are close together for efficient connection to its associated power supply system.
Another important object of the present invention is to provide an electrically heated window including an electrical heating system which is inexpensive to manufacture and may be readily applied to differently formed, sized and shaped windows.
Another important object of the present invention is to provide an electrically heated window including an electrical heating system which optimizes its electrical consumption to effectively and efficiently remove any ice or condensation which may have formed on the window in the vision critical areas.
Yet another important object of the present invention is to provide an electrically heated window including an electrical heating system, the electrical heating system comprising at least three electrical resistance heating elements connected in series, each of the electrical resistance heating elements having bus bars and a plurality of electrically conducting resistive filaments connected therebetween to generally define at least three heatable zones wherein at least one of the heatable zones being centrally positioned with respect to the other of the heatable zones, a first power supply connecting means connectable to one of the electrical resistance heating elements and a second power supply connecting means connectable to another of the electrical resistance heating elements.
The electrical resistance heating elements, their respective electrically conducting resistive filaments and the interconnecting bus bars are configured to provide a highly efficient heating system geometry for a window heating system to produce a higher temperature generally in the centrally positioned heatable zones at a more rapid heating rate than the temperature and heating rate in the other of the heatable zones