Ralph F Cohn

US Patent:

6897966, May 24, 2005

Filed:

Apr 5, 2002

Appl. No.:

10/116994

Inventors:

Ralph F. Cohn - Brookline MA, US

Assignee:

Poster-Miller, Inc. - Waltham MA

International Classification:

G01B011/24
G06K009/00
H04N015/00

US Classification:

356601, 356603, 356611, 382127, 348 42, 348 49

Abstract:

A non-contacting mensuration system including a light source for projecting light on a target; an imager having an image plane; a first optical subsystem configured to project a first image of the light on the target onto a first portion of the image plane of the imager; and a second optical subsystem configured to project a second image of the light on the target onto a second portion of the image plane of the imager so that two different images are obtained from different aspects simultaneously.

US Patent:

53300734, Jul 19, 1994

Filed:

Apr 15, 1993

Appl. No.:

8/047818

Inventors:

J. Randall Collins - Fort Wayne IN
Ralph F. Cohn - Waltham MA

Assignee:

Boston Advanced Technologies, Inc. - Newton MA

International Classification:

B67D 514

US Classification:

222 52

Abstract:

Methods and systems are disclosed for controlling dispensation of hydrocarbon fuels from storage tanks and the like, by employing a sensor in an environment proximal to the dispenser. The sensor preferably includes an optical waveguide having a central axis along which light can transmitted, and the waveguide is disposed in the environment, such that fuel present in the environment contacts at least a portion of the waveguide. The sensor further includes a light source for projecting light into a first end of the waveguide, and a detector for detecting the amount of light propagated through the waveguide. The sensor is electrically connected to a controller which terminates the dispensation of fuel in the event that a leak is detected by the sensor.

US Patent:

51266547, Jun 30, 1992

Filed:

Apr 2, 1990

Appl. No.:

7/504100

Inventors:

John C. Murphy - Columbia MD
Glenn S. Hartong - Columbia MD
Ralph F. Cohn - Worcester MA
Patrick J. Moran - Arnold MD

Assignee:

New York Gas Group - New York NY
Southern California Gas Company, - Elmonte CA
Columbia Gas System Service Corporation - Columbus OH

International Classification:

G01N 2726

US Classification:

324 712

Abstract:

Electrical current distribution in the soil surrounding a buried pipeline is detected by applying an AC electrical potential between the pipe and a buried electrode spaced from the pipe. The magnetic field at spaced localities along the pipe arising from currents transverse to the pipe is detected. Additionally, a potential containing a plurality of alternating frequencies is similarly applied to the pipe and the magnetic field induced by the resulting electrical current both along the pipe and transversely of the pipe is detected. The magnetic field is detected by correlation discrimination at spaced locations along the pipe and across the spectrum of the impressed frequencies. The detected data is used to determine the capacitance and resistance of the soil/pipe interface at localities along the pipe and to generate impedance plots which indicate characteristics of that interface.

US Patent:

50766961, Dec 31, 1991

Filed:

Mar 16, 1989

Appl. No.:

7/324494

Inventors:

Ralph F. Cohn - Worcester MA
James W. Wagner - Annapolis MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

G01N 2121
G01J 404

US Classification:

356369

Abstract:

Dynamic imaging microellipsometry (DIM) is a rapid full-field imaging technique for high resolution studies of thin-films. The DIM concept is based on radiometric polarizer, compensator, specimen, analyzer (PCSA) ellipsometry combined with video and image processing techniques. The theoretical basis for this approach is developed using the Jones vector and matrix formalism. Basic systems design is presented with error model predictions of ellipsometric accuracies better than 0. 1. degree. for full-field. psi. and. DELTA. images captured in a few seconds with spatial resolution under 10 microns.

US Patent:

54224950, Jun 6, 1995

Filed:

Apr 15, 1993

Appl. No.:

8/047809

Inventors:

Ralph F. Cohn - Waltham MA

Assignee:

Boston Advanced Technologies, Inc. - Newton MA

International Classification:

G01N 1506

US Classification:

250573

Abstract:

The present invention provides methods and systems for sensing the presence of fluids, such as hydrocarbon-based liquids and/or water, in an ambient environment based upon their light refractive properties. An optical waveguide is deployed in the environment (or a sample chamber disposed within the environment), such that the transmittance of light through the waveguide is attenuated in the presence of the fluid analyte. In one preferred embodiment, the light source is aligned with the waveguide, such that the light entering the waveguide enters one end at an angle relative to the central axis of the waveguide and propagates by internal reflection within the waveguide. Optimal propagation occurs in the absence of the fluid while the presence to the fluid in contact with the waveguide walls causes detectable losses in light propagation due to degradation of the internal reflectance.

US Patent:

50878735, Feb 11, 1992

Filed:

Apr 24, 1991

Appl. No.:

7/690290

Inventors:

John C. Murphy - Columbia MD
Glenn S. Hartong - Columbia MD
Ralph F. Cohn - Worcester MA
Patrick J. Moran - Arnold MD

Assignee:

New York Gas Group - New York NY
Southern California Gas Company - Elmonte CA
Columbia Gas System Service Corporation - Columbus OH

International Classification:

G01N 2726
C23F 1302

US Classification:

324 712

Abstract:

Electrical current distribution in the soil surrounding a buried pipeline is detected by applying an AC electrical potential between the pipe and a buried electrode spaced from the pipe. The magnetic field at spaced localities along the pipe arising from currents transverse to the pipe is detected. Additionally, a potential containing a plurality of alternating frequencies is similarly applied to the pipe and the magnetic field induced by the resulting electrical current both along the pipe and transversely of the pipe is detected. The magnetic field is detected by correlation discrimination at spaced locations along the pipe and across the spectrum of the impressed frequencies. The detected data is used to determine the capacitance and resistance of the soil/pipe interface at localities along the pipe and to generate impedance plots which indicate characteristics of that interface.

US Patent:

20180245946, Aug 30, 2018

Filed:

Feb 27, 2018

Appl. No.:

15/906177

Inventors:

- Cambridge MA, US
Ralph Cohn - Brookline MA, US
Eugene H. Cook - Acton MA, US

International Classification:

G01C 25/00
G01C 19/5776

Abstract:

According to one aspect, embodiments herein provide a whole angle gyroscope comprising a central point, at least one mass arranged symmetrically about the central point, a plurality of transducers, each configured to perform at least one of driving and sensing motion of the at least one mass, and a processor coupled to the plurality of transducers, the processor configured to operate the plurality of transducers to drive the at least one mass in at least a first vibratory mode and a second vibratory mode, identify a rate dead zone of the whole angle gyroscope, and operate the plurality of transducers to apply a force to the at least one mass to reduce the identified rate dead zone of the whole angle gyroscope.