1
Riley Kenneth P: Process control with graphical attribute interface.. Fisher Controls Int, April 20, 1994: EP0592921-A1 (33 worldwide citation)

Process attributes such as, for example, the identification of process elements, the characteristics of process elements, and the states of the variables produced by the process elements, are displayed substantially simultaneous with a graphical representation of a process under control. After displ ...


2
Milliken Jon Barry, Sickels Dennis Gene, Vanderah Richard Joseph: Process controller with modular i/o units.. Fisher Controls Int, June 17, 1992: EP0490864-A1 (29 worldwide citation)

A controller of the type used in process control includes a plurality of modular I/O units. The I/O units includes I/O circuits which may be of four basic types: digital input circuits, digital output circuit, analog input circuits and analog output circuits. Each of the I/O circuits has a code gene ...


3
Larson Brent H, Burns Harry A, Brown Larry K: Local device and process diagnostics in a process control network having distributed control functions. Fisher Controls Int, July 26, 2000: EP1022626-A2 (25 worldwide citation)

A field device for use in a process control network having a plurality of devices (12-32) communicatively coupled by a two-wire, all-digital communication bus includes a connector that connects the field device to the two-wire, all-digital bus (34) to enable all-digital communication over the bus, a ...


4
Davis James Russell, Wilson Robert Thomas: Valve stem packing containment for high pressure, high temperature.. Fisher Controls Int, March 22, 1989: EP0308390-A1 (20 worldwide citation)

A fluid valve for use in elevated pressure and temperature conditions. Composition material wiper rings are provided in the packing bore between the packing follower and the packing box ring. The composition wiper rings have an inner diameter substantially the same as the valve stem diameter to inhi ...


5
Seberger Stephen G, Grumstrup Bruce F, Gassman George W: Communication system and method.. Fisher Controls Int, April 13, 1994: EP0591926-A2 (11 worldwide citation)

The present invention relates to a circuit which is connected to a two-conductor control system for a variable analog DC input and that also enables bidirectional digital communication along the two conductors for diagnostic operations of a transducer. The novel circuit includes a switch circuit tha ...


6
Buls Melvin Lawrence, Hall Randy Jerold: Trim for ansi class v shut off valves.. Fisher Controls Int, December 8, 1993: EP0573399-A1 (9 worldwide citation)

The disclosed valve provides a seal (63) between the valve plug (49) and the valve body to substantially prevent leakage therebetween when the valve is in its closed position. The seal can be arranged for minimizing the net forces acting on the valve plug to close the valve or to keep the valve clos ...


7
Jundt Larry Oscar: Process control terminal.. Fisher Controls Int, August 29, 1990: EP0384910-A2 (7 worldwide citation)

A process control terminal may be used in a computer network consisting of a process control network of process controllers and an application network of host computers. The process control terminal allows a process control operator access to both process control functions and application programs b ...


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Wilson Grant, Deitz David L, Irwin William G, Sheriff Godfrey R: Batch process control system. Fisher Controls Int, March 8, 2000: GB2341240-A (6 worldwide citation)

Methods and apparatus for batch process control in which a Phase Logic Module 100 operable in accordance with the state machine model of the batch server program is embedded within a programmable controller 103. More specifically, a phase 610 executed by the batch server program in a data processing ...


10
Seberger Stephen G, Grumstrup Bruce F, Gassmann George W: Electro-pneumatic converter calibration.. Fisher Controls Int, April 13, 1994: EP0591925-A2 (5 worldwide citation)

A temperature compensation method for a microprocessor based electro-pneumatic converter device (10) including an initial calibration sequence, a compensation sequence, and an operation sequence. Linearization of an electro-pneumatic positioner including the steps of adjusting the positioner feedbac ...