John W Berthold1370 Union Ave, Salem, OH 44460

6490040, Dec 3, 2002

Aug 11, 2000

09/637717

John W. Berthold - Salem OH
Larry A. Jeffers - Minerva OH

McDermott Technology, Inc. - New Orleans LA

G01N 2149

356438, 359799, 356342

A fume sensor system that measures the concentration of fume particulate in a boiler and suppresses background noise.

6519041, Feb 11, 2003

Jun 29, 2000

09/606450

John W. Berthold - Salem OH

j w b c. llc - Salem OH

G02B 902

356477, 356478, 385 12

An intrinsically safe fiber optic hydrogen sensing assembly for detecting hydrogen levels in a system and/or for detecting hazardous hydrogen concentration gas leaks therefrom is disclosed. The sensor assembly preferably uses a palladium coated end of the fiber optic cable as the hydrogen sensor based upon the intensity and phase of the light reflecting off of the coated end. The assembly may be constructed to control the flow of hydrogen to the system and/or to sound an alarm indicative of leakage of hydrogen from the system.

6733173, May 11, 2004

Dec 19, 1996

08/770609

John T. Huston - Lancaster OH
John W. Berthold - Salem OH
Thomas E. Moskal - Pickerington OH

Diamond Power International, Inc. - New Orleans LA

G01J 500

374121, 374130, 374125, 374123

A pyrometer for use in measuring temperatures in a furnace, has a lens-tube for supporting an optical head in a port of the furnace for viewing an interior of the furnace along a line of sight. The optical head converts infrared radiation to electrical signals. A photometer circuit connected to the optical head processes the electrical signals and a scaling circuit connected to the photometer circuit scales the electrical signals. An output circuit connected to the scaling circuit receives the scaled electrical signals and produces output signals for display or control of the furnace. A power supply connected to the scaling circuit powers the photometer, scaling and output circuits. Calibration in the scaling circuit scales the electrical signals to be most sensitive to a wavelength of middle infrared radiation to which at least one gas component in the furnace is semi-transparent, for measuring the temperature of the at least one gas component.

7001067, Feb 21, 2006

Feb 9, 2004

10/774565

John T. Huston - Lancaster OH, US
John W. Berthold - Salem OH, US
Thomas E. Moskal - Pickerington OH, US

Diamond Power International, Inc. - New Orleans LA

G01J 5/00

374130, 374121, 374125, 374123

A pyrometer for use in measuring temperatures in a furnace, has a lens-tube for supporting an optical head in a port of the furnace for viewing an interior of the furnace along a line of sight. The optical head converts infrared radiation to electrical signals. A photometer circuit connected to the optical head processes the electrical signals and a scaling circuit connected to the photometer circuit scales the electrical signals. An output circuit connected to the scaling circuit receives the scaled electrical signals and produces output signals for display or control of the furnace. A power supply connected to the scaling circuit powers the photometer, scaling and output circuits. Calibration in the scaling circuit scales the electrical signals to be most sensitive to a wavelength of middle infrared radiation to which at least one gas component in the furnace is semi-transparent, for measuring the temperature of the at least one gas component.

7134346, Nov 14, 2006

Apr 14, 2005

11/105670

Richard L. Lopushansky - The Woodlands TX, US
John W. Berthold - Salem OH, US

Davidson Instruments Inc. - The Woodlands TX

G02B 6/00

73716, 73736, 385 13

A differential pressure transducer which incorporates a Fabry-Perot sensor for direct quantitative measurements of the distance displaced by a piston abutting two pressure boundaries is described. The apparatus includes a piston with an annular protrusion which is fitted into a transducer housing having a peripheral groove that serves as a stop to prevent damage to the in overpressure situations. A method of measuring differential pressure using a Fabry-Perot sensor is also contemplated.

7191660, Mar 20, 2007

Apr 14, 2005

11/105877

Richard L. Lopushansky - Woodlands TX, US
John W. Berthold - Salem OH, US

Davidson Instruments Inc. - The Woodlands TX

G01L 7/08

73715, 73716

Pressure transducers are used to measure pressure under high temperature, hostile environments, including in gas turbine combustors and internal combustion engines. The present a pressure transducer comprises a member having a first end and a second end, a diaphragm sealed within the member at the first end, a sensor sealed within the member at the first end and in operable communication with the diaphragm, a first plate having a plurality of apertures, the first plate being attached to the member at the second end, a second plate having a plurality of apertures, the second plate being attached to the tubular member at the second end and being spaced from the first plate, and wherein the apertures of the first plate are not aligned with the apertures of the second plate.

7305158, Dec 4, 2007

Feb 1, 2005

11/048521

Larry A. Jeffers - Minerva OH, US
John W. Berthold - Salem OH, US
Richard L. Lopushansky - The Woodland TX, US
David B. Needham - Magnolia TX, US

Davidson Instruments Inc. - The Woodlands TX

G02B 6/12
G02B 6/26
G01B 9/02

385 15, 385 14, 356477, 356480

A signal conditioner to measure the length of an interferometric gap in a Fabry-Perot sensor (interferometer). The invention includes a light source, a Fabry-Perot interferometer capable of spanning a range of gaps in response to physical changes in the environment, a second interferometer that is placed in series with the Fabry-Perot interferometer which does not filter any particular wavelengths of light but acts as an optical cross-correlator, a detector for converting the correlated light signal into electronic signals, and an electronic processor which controls system elements and generates a signal indicative of the length of the gap spanned by the Fabry-Perot sensor.

7355684, Apr 8, 2008

Apr 15, 2005

11/106750

Larry A. Jeffers - Minerva OH, US
John W. Berthold - Salem OH, US
Richard L. Lopushansky - The Woodlands TX, US

Davidson Instruments, Inc. - The Woodlands TX

G01L 1/24

356 355, 356480

A method and apparatus for quantitatively measuring the distance of an unknown variable gap is disclosed. Light is provided to two Fabry-Perot interferometers arranged in a series, one spanning the unknown gap and the other spanning a controllably variable gap. Means for verifying the positioning of the Fabry-Perot interferometer having the controllably variable gap work in conjunction with a signal processor, a correlation burst signal detector and means for conveying the light to the various system elements to perform a comparison of detector signals from the two interferometers and quantitatively establish the gap distance. The invention may also be varied to function on a time basis, include more than one source of light, possess filter means to distinguish between light sources and/or include one or more reference interferometers.