Glass membrane touch-controlled circuit apparatus for voltage selection
Patent 4975676 Issued on December 4, 1990. Estimated Expiration Date: 
November 13, 2009. 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.
November 13, 2009. 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 ReferencesControl panel overlay Switching assembly equipped with display means installed behind the switching assembly Nonplanar transparent electrographic sensor Touch sensitive control panel and a method of manufacture thereof Interactive display system with touch data entry Patent #: 4310839 InventorAssigneeApplicationNo. 435988 filed on 11/13/1989US Classes:338/114, Deformable200/5A, With independent operators338/99Surfaces pressed together (e.g., compressible type)ExaminersPrimary: Reynolds, Bruce A.Assistant: Lateef, Marvin M. Attorney, Agent or FirmInternational ClassH01C 010/10AbstractA glass membrane touch-controlled circuit apparatus for voltage selection. The apparatus has a flexible glass membrane which is spaced by a dielectric layer adhesively joined between the upper flexible glass membrane and a lower, rigid support layer. Conductive circuitry is printed onto the surface of the upper flexible glass membrane and corresponding areas of conductive and/or resistive circuitry are printed onto the lower support layer. By application of tactile pressure to the upper flexible glass membrane, the conductive circuitry printed onto the flexible glass membrane can be moved into a point of momentary contact with the circuitry carried on the lower support layer. | |
