Arthur J Brown

US Patent:

47366230, Apr 12, 1988

Filed:

Mar 30, 1987

Appl. No.:

7/031547

Inventors:

Arthur R. Brown - Bolingbrook IL
David C. Miller - Downers Grove IL

Assignee:

Amoco Corporation - Chicago IL

International Classification:

G01M 332

US Classification:

73 492

Abstract:

The leak detector is utilized for determining the presence of a leak in an above ground tank of liquid having a lower specific gravity and a lower electrical or thermal conductivity than water. The leak detector includes a device for determining the level of water in the tank and a mechanism for sensing changes in the level of water in the tank over time. A leak detecting system utilizing the leak detector will also include an apparatus for determining the amount and rate of leakage relative to the capacity of the tank and the change of the level of the water in the tank over a selected time period.

US Patent:

47366222, Apr 12, 1988

Filed:

Mar 30, 1987

Appl. No.:

7/031546

Inventors:

David C. Miller - Downers Grove IL
Arthur R. Brown - Bolingbrook IL

Assignee:

Amoco Corporation - Chicago IL

International Classification:

G01M 332

US Classification:

73 492

Abstract:

In using the method for testing for leaks, in an above ground tank of liquid having a lower specific gravity and a lower electrical or thermal conductivity than water, first an amount of water sufficient to cover the bottom of the tank is introduced into the tank after which the level of the water in the tank is determined and changes in the level of the water in the tank over time are sensed. Additionally, the amount and rate of leakage relative to the capacity of the tank and the change in the level of the water of the tank over a selected time period are determined from the given parameters and the change in water level.

US Patent:

48132845, Mar 21, 1989

Filed:

Feb 19, 1988

Appl. No.:

7/158297

Inventors:

David C. Miller - Downers Grove IL
Arthur R. Brown - Warrenville IL

Assignee:

Amoco Corporation - Chicago IL

International Classification:

G01M 332

US Classification:

73 492

Abstract:

The method for detecting leaks in an above ground storage tank includes the step of first determining the level of water in the tank by establishing, in a container lowered into and resting on the bottom of the tank, a clean interface between water and a liquid hydrocarbon product in the tank which has entered into the container. Preferably the method includes an initial step of inserting a predetermined amount of water into the container before lowering the container into the tank. The method also includes sensing changes in conductivity along a line intersecting an interface between the liquid hydrocarbon product in the tank and water in the tank with a leak detector in a casing and establishing a clean interface in the leak detector to prevent debris at the interface in the tank from fouling the sensing of changes of conductivity. Further, the method of establishing a clean interface in the container or the casing includes lowering the container or casing which is substantially closed and which is provided with an opening at the upper end thereof into the tank until it reaches the bottom of the tank; opening an inlet/outlet opening in the lower end of the container or casing after it has settled on the bottom of the tank; and, allowing a clean interface to be established in the container or casing.

US Patent:

53717422, Dec 6, 1994

Filed:

Aug 12, 1992

Appl. No.:

7/929077

Inventors:

Arthur H. Brown - Aurora IL
Ronnie E. Dean - Aurora IL

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

G06F 1132

US Classification:

371 7

Abstract:

A hierarchal organization of registers containing error indicators is utilized to determine which of a plurality of error recovery modules is to be executed. A redundancy mask and a priority mask stored in a data table associated with each register are sequentially applied to each register in order to eliminate redundant error indicators resulting from a common fault and to set the order of execution of error recovery modules. Thus, the redundancy and priorities associated with detected errors can be controlled substantially independent of the actual error recovery actions to be taken.

US Patent:

59882328, Nov 23, 1999

Filed:

Aug 14, 1998

Appl. No.:

9/134020

Inventors:

Wolfgang H. Koch - Batavia IL
Arthur R. Brown - Warrenville IL

Assignee:

Tokheim Corporation - Fort Wayne IN

International Classification:

B65B 104

US Classification:

141 59

Abstract:

A vapor recovery system is disclosed that provides direct measurements of the oxygen concentration within fugitive vapor emissions displaced from a fuel tank during refueling activity. The hydrocarbon concentration is derived from the oxygen concentration and used to adjust the operating speed of a vapor pump so as to minimize the presence of oxygen in the vapor recovery line.

US Patent:

48132691, Mar 21, 1989

Filed:

Feb 19, 1988

Appl. No.:

7/158296

Inventors:

Arthur R. Brown - Warrenville IL
David C. Miller - Downers Grove IL

Assignee:

Amoco Corporation - Chicago IL

International Classification:

G01M 332

US Classification:

73 492

Abstract:

A magnetic contaminant collector for collecting magnetizable particles is provided for use in an above ground storage tank and is situated in the tank at the interface between the liquid product in the tank and the water in the tank. A leak detector including a sensor assembly comprising an array of conductivity sensors for sensing conductivity is also situated in the tank. The magnetic contaminant collector is located so as to prevent magnetizable particles from fouling the conductivity sensors of the leak detector.

US Patent:

61677477, Jan 2, 2001

Filed:

Aug 14, 1998

Appl. No.:

9/134116

Inventors:

Wolfgang H. Koch - Batavia IL
Arthur R. Brown - Warrenville IL

Assignee:

Tokheim Corporation - Fort Wayne IN

International Classification:

B67D 5378
B65B 104
G01N 2902

US Classification:

73 1903

Abstract:

A vapor recovery system is disclosed that utilizes a crystal oscillator for sensing the presence of hydrocarbon in the vapor emissions emanating from a fuel tank during refueling. The crystal oscillator is coated with a layer of material having a sensitivity for hydrocarbon. In response to any interaction between the coating layer and hydrocarbon, the crystal oscillator experiences a shift in its oscillation frequency relative to the fundamental resonance frequency. The frequency shift is representative of the hydrocarbon concentration in the vapor emissions. A control signal based on the frequency shift is generated and then used to adjust the operating speed of the vapor pump.

US Patent:

50755501, Dec 24, 1991

Filed:

Jul 12, 1990

Appl. No.:

7/552242

Inventors:

David C. Miller - Downers Grove IL
Arthur R. Brown - Warrenville IL

Assignee:

Amoco Corporation - Chicago IL

International Classification:

G01N 2135

US Classification:

2503385

Abstract:

The infrared dual beam hydrogen fluoride (HF) gas detector comprises a light source for generating a light beam, a reference filter which passes light at a wavelength in the infrared range, such wavelength light being highly not absorbed by HF gas, an HF sensing filter which passes light at a wavelength in the infrared range, such wavelength light being highly absorbed by HF gas, structure for directing the light beam through a space containing vapor under investigation and alternately through each filter, a first sensor for sensing the light transmitted through the reference filter and for generating a first signal, a second sensor for sensing the light transmitted through the HF sensing filter and for generating a second signal, first circuitry for demodulating and amplifying the first signal generated by light transmitted through the reference filter, second circuitry for demodulating and amplifying the second signal generated by light transmitted through the HF sensing filter, and a comparator for comparing the first demodulated and amplified signal with the second demodulated and amplified signal and for generating an output control signal indicative of the amount of HF gas in parts per million - meters in the vapor in the space under investigation.