Patents by Inventor Warren E. Cook
Warren E. Cook has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9696742Abstract: Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.Type: GrantFiled: January 7, 2013Date of Patent: July 4, 2017Assignee: Invensys Systems, Inc.Inventors: Warren E. Cook, Joseph J. Lewicke, Peter E. Allstrom, James H. Vignos
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Publication number: 20160041576Abstract: Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.Type: ApplicationFiled: January 7, 2013Publication date: February 11, 2016Applicant: INVENSYS SYSTEMS, INC.Inventors: Warren E. Cook, Joseph J. Lewicke, Peter E. Allstrom, James H. Vignos
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Publication number: 20110077911Abstract: Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.Type: ApplicationFiled: December 10, 2010Publication date: March 31, 2011Applicant: INVENSYS SYSTEMS, INC.Inventors: Warren E. Cook, Joseph J. Lewicke, Peter E. Allstrom, James H. Vignos
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Patent number: 7853415Abstract: Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.Type: GrantFiled: March 1, 2007Date of Patent: December 14, 2010Assignee: Invensys Systems, Inc.Inventors: Warren E. Cook, Joseph J. Lewicke, Peter E. Allstrom, James H. Vignos
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Patent number: 7212928Abstract: Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.Type: GrantFiled: September 6, 2002Date of Patent: May 1, 2007Assignee: Invensys Systems, Inc.Inventors: Warren E. Cook, Joseph J. Lewicke, Peter E. Allstrom, James H. Vignos
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Publication number: 20040049358Abstract: Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.Type: ApplicationFiled: September 6, 2002Publication date: March 11, 2004Inventors: Warren E. Cook, Joseph J. Lewicke, Peter E. Allstrom, James H. Vignos
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Patent number: 6686831Abstract: A process control instrument includes a sensor/actuator portion and a transmitter portion connected to the sensor/actuator portion. The transmitter portion is operable to communicate with other process variable transmitters through a communication network. The transmitter includes a processing module and a power module operable to generate a power output supplied to at least the transmitter portion, wherein the power module is operable to adjust the power output based on a power control signal. Moreover, the power control signal may be generated by a controller device remote from the process control instrument and communicated to the process control instrument over the communication network. Additionally, the power module includes a power control module for adjusting the power output.Type: GrantFiled: September 18, 2001Date of Patent: February 3, 2004Assignee: Invensys Systems, Inc.Inventors: Warren E. Cook, Vladimir Kostadinov
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Publication number: 20020097031Abstract: A process control instrument includes a sensor/actuator portion and a transmitter portion connected to the sensor/actuator portion. The transmitter portion is operable to communicate with other process variable transmitters through a communication network. The transmitter includes a processing module and a power module operable to generate a power output supplied to at least the transmitter portion, wherein the power module is operable to adjust the power output based on a power control signal. Moreover, the power control signal may be generated by a controller device remote from the process control instrument and communicated to the process control instrument over the communication network. Additionally, the power module includes a power control module for adjusting the power output.Type: ApplicationFiled: September 18, 2001Publication date: July 25, 2002Inventors: Warren E. Cook, Vladimir Kostadinov
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Patent number: 6212975Abstract: A digital signal processing system operating in conjunction with a vortex flowmeter passes a digital representation of a flowmeter signal into a multistage decimator having two outputs. The two outputs correspond to the vortex flowmeter signal downsampled to two different sampling frequencies. One of the two outputs passes to an on-line channel having an adaptive bandpass filter for tracking the fundamental frequency of the vortex flowmeter signal, thereby continuously monitoring the flow rate. The other of the two outputs passes to an off-line channel having a tunable bandpass filter that can be used to observe frequency components other than those near the fundamental frequency. The system thus enables maintenance personnel to conveniently monitor the noise spectrum generated by the flow without interrupting the operation the flow measurement.Type: GrantFiled: December 28, 1998Date of Patent: April 10, 2001Assignee: The Foxboro CompanyInventor: Warren E. Cook
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Patent number: 6058785Abstract: A method of reducing noise in a mass flow measuring system includes equalizing the ratio of stiffness to mass of a sleeve located in a flow path to the ratio of stiffness to mass of a rod located within the sleeve. The method further includes recognizing a frequency signal from two capacitive sensors mounted to sense axial deflection of the sleeve relative to the rod. The frequency signal is twice the frequency signial from two capacitive sensors mounted to sense lateral deflection of the sleeve relative to the rod. An output of the capacitive sensors for sensing lateral deflection is connected to a conductance circuit and an output of two additional capacitive sensors mounted to sense lateral deflection is connected to the another conductance circuit. The method includes adjusting an output of one of the conductance circuits such that the sum of the outputs is zero.Type: GrantFiled: September 8, 1998Date of Patent: May 9, 2000Assignee: Foxboro CompanyInventors: Richard W. Kalinoski, Warren E. Cook
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Patent number: 5804740Abstract: A vortex mass flowmeter includes a body for placement in a flow path of a fluid and four capacitive sensors. The body has a sleeve and a rod positioned within a chamber in the sleeve. Two of the capacitive sensors are mounted to sense lateral deflection of the sleeve relative to the rod and two of the capacitive sensors are mounted to sense axial deflection of the sleeve relative to the rod, thereby providing frequency signals related to shedding and drag, respectively. The shedding signal is dependent on the flow velocity, and the drag signal is dependent on the flow velocity and the fluid density.Type: GrantFiled: January 17, 1997Date of Patent: September 8, 1998Assignee: The Foxboro CompanyInventors: Richard W. Kalinoski, Warren E. Cook