Thomas C Schmidt

US Patent:

40006581, Jan 4, 1977

Filed:

Nov 21, 1975

Appl. No.:

5/634089

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01P 1502

US Classification:

73490

Abstract:

A method and apparatus for measuring the displacement of structures using force balance accelerometers and double integration.

US Patent:

44958226, Jan 29, 1985

Filed:

Dec 23, 1982

Appl. No.:

6/452688

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01F 166

US Classification:

7386127

Abstract:

A method of determining the velocity of a stream in a vessel comprising the steps of: providing a first quantity of ultrasonic energy to a wall of the vessel at a first predetermined location so that the first quantity of ultrasonic energy induces a first compressional wave in the stream; sensing the first compressional wave at a second predetermined location along the wall, the second location being spaced from the first location by a distance that is at least as large as the distance required for the first quantity of ultrasonic energy to induce the first compressional wave in the stream; providing a second quantity of ultrasonic energy to the wall at the second predetermined location so that the second quantity of ultrasonic energy induces a second compressional wave in the stream; sensing the second compressional wave at the first predetermined location; determining a first amount of time elapsed between the providing of the first quantity of ultrasonic energy and the sensing of the first compressional wave; and determining a second amount of time elapsed between the providing of the second quantity of ultrasonic energy and the sensing of the second compressional wave.

US Patent:

40261506, May 31, 1977

Filed:

Feb 17, 1976

Appl. No.:

5/658934

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01F 132

US Classification:

73194VS

Abstract:

A method and apparatus for determining the mass flow of a fluid using dielectric constant measurements to determine density and converting the velocity of flow to a related frequency. The measurement of both the dielectric constant and frequency are made using a single capacitor.

US Patent:

47221429, Feb 2, 1988

Filed:

Oct 16, 1985

Appl. No.:

6/789344

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01B 706

US Classification:

33169F

Abstract:

An apparatus for measuring the thickness of a coating on the inside wall of a metallic tubular member comprising: a housing; means for positioning the housing in a predetermined position in relation to the inside wall; a probe comprising means for following the contour of the surface of the coating, and means for sensing the distance between the contour following means and the inside wall as an indication of the thickness of the coating; and means for attaching the probe to the housing such that the probe is positioned in a predetermined position in relation to the inside wall.

US Patent:

40230961, May 10, 1977

Filed:

Feb 17, 1976

Appl. No.:

5/658933

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01R 2726

US Classification:

324 61R

Abstract:

A method and automatic apparatus for determining the physical properties of an emulsion wherein a sample of the emulsion is allowed to settle in a sample cell formed by a capacitor. The interface level, as emulsion breaks and settles to its final value, is followed by measuring the cell capacity.

US Patent:

42175445, Aug 12, 1980

Filed:

Oct 16, 1978

Appl. No.:

5/951918

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01R 2702

US Classification:

324 65CR

Abstract:

An improved method and apparatus to compensate for temperature variations in an electrical resistance corrosion measuring system. Sacrificial probes are inserted into a corrosive atmosphere at significant points, and corrosion-related losses from these probes are measured by monitoring changes in probe resistance. By comparing these changes to a reference probe, accurate determinations of corrosion are made. A novel method of automatic temperature compensation removes essentially all degrading effects of changes in temperature on the corrosion measurement system, by obtaining a reference signal which varies proportionately with temperature and counteracting instantaneous and extended temperature changes by subtracting the reference signal due to temperature variations from the uncompensated system output signal due to the combined effects of corrosion and temperature.

US Patent:

45681996, Feb 4, 1986

Filed:

Apr 6, 1983

Appl. No.:

6/482700

Inventors:

Thomas R. Schmidt - Houston TX

Assignee:

Shell Oil Company - Houston TX

International Classification:

G01J 546
H04B 1700

US Classification:

374122

Abstract:

A method of and apparatus for measuring the temperature of hot gases and/or particulate matter inside of a heated vessel is provided. The apparatus senses microwave energy emitted by the hot gases from the heated vessel, converts the sensed microwave energy into a signal indicative thereof, and measures the amplitude of the signal as an indication of the temperature of the gas inside of the heated vessel. The antenna of the apparatus may be located interior of the pressure wall of the vessel, and may also contain refractory material in it. Any refractory material between the antenna and the source of microwaves is transparent to microwave radiation. The heated vessel may also have a refractory wall, which may contain the waveguide and/or antenna.