21
Snowbarger Jimmie Lee, Ali Riyaz M: System to manually initiate an emergency shutdown test and collect diagnostic data in a process control environment. Fisher Controls Int, May 12, 2004: EP1417552-A2 (3 worldwide citation)

An emergency shutdown test, wherein the emergency shutdown test system includes an emergency shutdown device controller and sensors to provide data to the controller. The emergency shutdown device controller has a processor, a memory coupled to the processor and an auxiliary input couple to the proc ...


22
Rice Donald Duane, Hood Mark Erby: Droop compensated direct acting pressure regulator.. Fisher Controls Int, September 6, 1989: EP0331665-A2 (2 worldwide citation)

A self-operated droop compensated regulator includes a spring casing (12) and a lower casing, sandwiching a diaphragm (20). The lower casing has axially aligned inlet (22) and outlet ports (24). A one piece cam stem and relief seat (30) is mounted for movement with the diaphragm and includes a first ...


23
Burlage Brian J, Paullus Steven B, Good Stanley R, Gaarder Barry Lynn: Electro-pneumatic converter.. Fisher Controls Int, March 16, 1994: EP0587170-A2 (2 worldwide citation)

An electro-pneumatic converter device with modular components and with supporting housing structure enabling the device to be readily convertible from a current to pressure positioner to a current to pressure transducer. A valve positioner with an enclosure having a housing (202), a modular base (20 ...


24
Baumann Hans D: Rotary pneumatic actuator. Fisher Controls Int, September 17, 2003: EP1344947-A2 (2 worldwide citation)

A method and apparatus for translating linear movement into rotational movement in an actuator configuration is provided. For example, a rotary actuator assembly includes a housing (12) having a central bore (14). A piston (18) is disposed within the housing (12) and is linearly movable along an axi ...


25
Brown Larry K, Larson Brent H, Burns Harry A: Function block apparatus for viewing data in a process control system. Fisher Controls Int, December 18, 2002: EP1267233-A1 (2 worldwide citation)

The present invention is directed to a method of and a device for monitoring, from a central location, the current operating conditions (such as values of process parameters) in a process control network having distributed control functions. In one embodiment, the method and. device of the present i ...


26
Bovee Loren Lee, Swartz Larry Lloyd: Adjustable position indicating apparatus.. Fisher Controls Int, March 30, 1988: EP0262114-A2 (2 worldwide citation)

This disclosure relates to apparatus for use with a mechanism having at least one preselected position and for indicating whether the mechanism is at this position. The apparatus comprises a lever having an axis of rotation and which is rotatable on the axis. A cam is fastened to the lever and is ro ...


27
Lloyd Sheldon Gilbert: Differential pressure sensing apparatus.. Fisher Controls Int, August 9, 1989: EP0327524-A2 (2 worldwide citation)

An apparatus for sensing differential pressures is provided. The apparatus includes a housing having an inner chamber filled with an incompressible working fluid. First and second diaphragms are provided in said housing for interacting with the fluids being measured. A flex-tube is provided in the h ...


28
Nicolet Scott James, Thompson Richard Bruce: Regenerative communication channel extender.. Fisher Controls Int, November 3, 1993: EP0568520-A2 (2 worldwide citation)

A regenerative digital communication channel extender is provided which converts electrical signals in a first communication network into optical signals and then reconverts the optical signals back into electrical signals for application to a second communication network. The conversion is preferab ...


29
Wilson Robert Thomas: Taper key joint for connecting a rotary valve shaft to a valve disc.. Fisher Controls Int, July 20, 1988: EP0275247-A1 (2 worldwide citation)

An improved joint connection between a rotary valve shaft (12) and valve closure member (10) for a fluid valve. A tapered key (24) has a flat surface (26) tapered at a small angle with respect to the opposite key surface. The rotary valve shaft (12) includes a groove (32) with a flat surface. The ta ...


30
Galbreath Curt, Winkler Richard J, Seberger Stephen G: Magnetic position sensor with integrated hall effect switch. Fisher Controls Int, December 21, 2005: EP1606589-A1 (2 worldwide citation)

A non-contacting position sensor having primary and secondary sensors detects relative displacement between two objects. The secondary sensor may function as a limit switch detection element in a limit switch circuit, and is positioned to be in the path of magnetic flux not detected by the primary s ...