Alan B Campbell

US Patent:

46273867, Dec 9, 1986

Filed:

Apr 16, 1985

Appl. No.:

6/723648

Inventors:

Thomas E. Duffy - San Diego CA
John P. Archibald - La Jolla CA
Alan H. Campbell - Encinitas CA

Assignee:

Solar Turbines, Inc. - San Diego CA

International Classification:

F22B 3314

US Classification:

122 1B

Abstract:

A compact, unfired, staggered tube, once-through steam generator or boiler of simple construction intended primarily for combined cycle power plants in which the thermal energy utilized to generate steam is obtained from the exhaust gases of a gas turbine engine. The boiler provides steam at two different pressure levels, which maximizes recovery of thermal energy; and all wettable components in the steam/water loop are fabricated of corrosion resistant materials. This eliminates the need for controlling the pH of the feedwater and the need for chemically controlling its dissolved oxygen content, thereby reducing maintenance and operating costs and making automatic, unattended, remotely controlled operation of the boiler practical as well as eliminating the need for blowing down the boiler and minimizing requirements for make-up water. The boiler can be operated dry to remove gas side fouling; and feedwater flow rates can be directly controlled. Orifice-generated pressure drops at the inlets of the boiler tubes which are relatively large compared to the pressure drop in the rest of each tube eliminate the flow instability that is characteristic of once-through boilers.

US Patent:

52378160, Aug 24, 1993

Filed:

Dec 31, 1984

Appl. No.:

7/687814

Inventors:

Thomas E. Duffy - San Diego CA
Alan H. Campbell - Encinitas CA
O. Leon Lindsey - La Mesa CA

Assignee:

Solar Turbines Incorporated - San Diego CA

International Classification:

F01K 1302

US Classification:

60 39182

Abstract:

Control systems (or controllers) for once through, unfired steam generators (or boilers) which control a single parameter--the feedwater flow to the boiler--in accord with an energy or enthalpy balance between the hot gases supplied to the boiler and the steam generated in it. These control systems have a predictive mode of feedwater control and, optionally, an operator selectable, feedback mode to compensate for drifts in the predictive mode. Other corrections may also be made, and predictive and corrective flow splits can be provided to obtain maximum efficiency when the control system is utilized to regulate the operation of a dual pressure boiler.

US Patent:

49894056, Feb 5, 1991

Filed:

Aug 19, 1986

Appl. No.:

6/898128

Inventors:

Thomas E. Duffy - San Diego CA
John P. Archibald - La Jolla CA
Alan H. Campbell - Encinitas CA

Assignee:

Solar Turbines Incorporated - San Diego CA

International Classification:

F02C 618

US Classification:

60 39182

Abstract:

A compact, unfired, staggered tube, once-through steam generator or boiler of simple construction intended primarily for combined cycle power plants in which the thermal energy utilized to generate steam is obtained from the exhaust gases of a gas turbine engine. The boiler provides steam at two different pressure levels, which maximizes recovery of thermal energy; and all wettable components in the steam/water loop are fabricated of corrosion resistant materials. This eliminates the need for controlling the pH of the feedwater and the need for chemically controlling its dissolved oxygen content, thereby reducing maintenance and operating costs and making automatic, unattended, remotely controlled operation of the boiler practical as well as eliminating the need for blowing down the boiler and minimizing requirements for make-up water. The boiler can be operated dry to remove gas side fouling; and feedwater flow rates can be directly controlled. Orifice-generated pressure drops at the inlets of the boiler tubes which are relatively large compared to the pressure drop in the rest of each tube eliminate the flow instability that is characteristic of once-through boilers.

US Patent:

20220370011, Nov 24, 2022

Filed:

May 6, 2022

Appl. No.:

17/738990

Inventors:

- San Diego CA, US
Alan Steven CAMPBELL - San Diego CA, US

International Classification:

A61B 5/00
A61B 5/145

Abstract:

Fault detection and diagnostics for a microneedle array based continuous analyte monitoring device are provided. The electrochemical sensors, including the electrodes of the analyte monitoring device configured for measuring one or more target analytes, may experience various faults during use of the analyte monitoring device. By modeling the sensors as an electrical network, measurements of the electrical network may be correlated with operational parameters of the sensor. The voltage at the counter electrode provides an indication of the resistance or impedance between the working electrode and the counter electrode and is used to identify the occurrence of faults occurring at the continuous analyte monitoring device.

US Patent:

20210379370, Dec 9, 2021

Filed:

Jul 2, 2021

Appl. No.:

17/367274

Inventors:

- San Diego CA, US
Thomas Arnold Peyser - Menlo Park CA, US
Alan Campbell - San Diego CA, US
Pradnya Prakash Samant - San Diego CA, US
Naresh Bhavaraju - San Diego CA, US
Hooman Sedghamiz - Vista CA, US
David Morelock - San Diego CA, US

Assignee:

Biolinq, Inc. - San Diego CA

International Classification:

A61N 1/30
A61N 1/05
A61B 5/1468
A61B 5/05
A61B 5/145
A61M 5/172

Abstract:

Devices and methods to mitigate the erroneous signal imparted by physical and/or chemical process incident upon analyte-selective electrochemical sensors that are non-analyte-related in origin are disclosed herein. A sensing system featuring at least one of an analyte-selective sensor and at least one of an analyte-invariant sensor.

US Patent:

20200337641, Oct 29, 2020

Filed:

Nov 2, 2018

Appl. No.:

16/760431

Inventors:

- Oakland CA, US
Juliane Sempionatto Moreto - La Jolla CA, US
Jonas Felipe Kurniawan - La Jolla CA, US
Aida Martin Galan - La Jolla CA, US
Jayoung Kim - La Jolla CA, US
Alan Campbell - La Jolla CA, US
Jose Roberto Moreto - La Jolla CA, US

International Classification:

A61B 5/00
A61B 5/145
A61B 5/05

Abstract:

Disclosed are devices, systems and methods for epidermal monitoring of a fluid on skin. In some aspects, a device includes an electrochemical sensor comprising two or more electrodes disposed on a first flexible substrate; a microfluidic device comprising a second flexible substrate coupled to the first substrate and structured to include (i) a channel in a first cavity of the second substrate, (ii) one or more holes that connect to the channel and provide one or more inlets, and (iii) a reservoir connected to the channel, in which the electrochemical sensor is aligned with the reservoir; and an adhesion layer coupled to the microfluidic device and attachable to skin, and the device being operable to detect a biomarker in a fluid in secreted by the skin into the microfluidic device.