Industrial process control system
Patent 4396977 Issued on August 2, 1983. Estimated Expiration Date: 
August 2, 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.
August 2, 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 References 3474438 3898643 Concurrent overview and detail display system having process control capabilities Bar graph type touch switch and display device Position encoding arrangements System for changing alphanumeric values that are displayed on cathode ray tube screens Patent #: 4238792 InventorsAssigneeApplicationNo. 06/159599 filed on 06/16/1980US Classes:700/83, Having operator control interface (e.g., control/display console)345/173Touch panelExaminersPrimary: Ruggiero, JosephAttorney, Agent or FirmInternational ClassesG05B 23/02 (20060101)G06F 3/033 (20060101) G06F 3/037 (20060101) AbstractAn industrial process control system in accordance with the present invention includes a plurality of device controllers connected together through a common buss with each device controller connected to an associated controlled device(s) that effect process control. A computer-aided system interface for controlling the overall system includes a visual display device in the form of a multi-color CRT and a graphic input device in the form of a transparent touch-responsive panel that overlies the CRT display screen. Computer generated symbols representing the controlled devices are displayed on the CRT screen to define touch-responsive target areas. When an appropriate target area is touched by a human operator, a signal, such as a command signal, is generated to cause the controlled device whose symbol is displayed in the designated target area to respond, with this response being then indicated by a change in the device symbol being displayed on the screen. Other features include generation of a "hit" display to indicate the last coordinates on the display screen touched by the operator, a two-step execute command sequence for entering high priority commands into the system, and the changing of analog set point values as a function of the time that a selected target area is touched. The system advantageously eliminates some, if not all, input through a conventional keyboard so that the system operator interfaces with the system through easily comprehended and non-ambiguous visual symbols.Other References
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