Edge terminations for impedance planes
Patent 4371746 Issued on February 1, 1983. Estimated Expiration Date: 
February 12, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 12, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesGraphical data entry pad Successively electromagnetically scanned x-y grid conductors with a digitizing system utilizing a free cursor or stylus Electrical data entry devices System for producing electric field with predetermined characteristics and edge terminations for resistance planes therefor Resistive planar graphical entry device Touch panel system and method Patent #: 4293734 InventorAssigneeApplicationNo. 06/120605 filed on 02/12/1980US Classes:178/18.05ResistiveExaminersPrimary: Robinson, Mark A.Attorney, Agent or FirmInternational ClassesG06F 3/033 (20060101)G10H 1/055 (20060101) A63F 9/00 (20060101) AbstractEdge terminations for polygonal impedance or resistance surfaces provide linearization of current flow to and/or from the surface through electrical connections at the vertices of the polygon. The edge terminations are constituted by a series of parallel ranks or rows of connective segments overlaid, inlaid or printed at each edge of the polygonal surface with the innermost row or rank being short straight segments and the length of each segment of the next innermost row, respectively, being longer. The central segment in each row or rank is electrically interconnected with the central segments in the other rows. A guard plane of conductive metal insulated from the impedance or resistance surface is also provided. | |
