George Darrell Nelson

Author:

George Nelson

ISBN #:

0316603120

Author:

George Nelson

ISBN #:

0316603112

Author:

George Nelson

ISBN #:

0394737393

Author:

George Nelson

ISBN #:

0823074390

Author:

George Nelson

ISBN #:

0873514122

Author:

George Nelson

ISBN #:

0926494023

Author:

George W. Nelson

ISBN #:

0682401404

Author:

George H. Nelson

ISBN #:

0824773160

US Patent:

54323053, Jul 11, 1995

Filed:

Jul 25, 1994

Appl. No.:

8/279411

Inventors:

George F. Nelson - Coon Rapids MN

Assignee:

Unisys Corporation - St. Paul MN

International Classification:

G01V 100
G01N 332

US Classification:

181101

Abstract:

A acoustic-penetrometer probe and method for determining the presence of materials in a region proximate the penetrometer probe through measurement of reflected acoustic waves, with the probe having a driving head on one end to permit forcing the driving head into the soil, with the probe including an acoustic generator mounted in the probe for generating a below-ground acoustic wave that normally travels away from the acoustic generator, and an acoustic detector located in the probe to measure acoustic waves reflected from objects or materials located proximate the probe to thereby provide a user with information on the presence of materials proximate a radial region located around the probe.

US Patent:

59398884, Aug 17, 1999

Filed:

Aug 26, 1997

Appl. No.:

8/917421

Inventors:

George F. Nelson - Coon Rapids MN

Assignee:

New Holland North America, Inc. - New Holland PA

International Classification:

G01N 2204

US Classification:

324640

Abstract:

A monitor for monitoring the moisture content of grain comprises at least one programmable PIN diode attenuator connected between a microwave measurement signal source and a transmit antenna. A controller stores an addressable attenuation table, each location in the table storing an attenuation value and an associated attenuator address. A counter accesses the table locations sequentially and the attenuator addresses are applied to the attenuator to cause a step-wise decreasing attenuation of the measurement signal which is then transmitted through the grain. After the signal passes through the grain, it is detected and applied to a threshold comparator. When the magnitude of the detected signal reaches the threshold, the counter is stopped and the attenuation value at the location pointed to by the counter is taken as the attenuation of the measurement due to moisture in the grain. Once the attenuation has been determined, the moisture content and mass grain flow may be calculated. The determination of attenuation and moisture content is accomplished with digital circuitry and the determination of attenuation requires only a go no-go comparison of the measurement signal with a threshold value.

US Patent:

55215149, May 28, 1996

Filed:

Jan 3, 1995

Appl. No.:

8/368270

Inventors:

George F. Nelson - Coon Rapids MN
David P. Andersen - Burnsville MN

Assignee:

Loral Corporation - New York NY

International Classification:

G01R 2726
G08B 2100

US Classification:

324660

Abstract:

A broken tine detector for agricultural machines is provided for machines such as balers and forage harvesters. The tines form a first plate of a capacitor which rotates about the axis of a reel. The second plate of the capacitor may be provided by a back-plate which is located at the front of an agricultural machine adjacent to the ends of the tines and which is connected to machine ground. An alternate embodiment of the invention is devised by utilizing conductive strips on a tine guard. Each of the conductive strips may be utilized to form the second plate of the capacitor. The row of tines pass through individual slots in the tine guard so that a particular row in which the tine is broken may be detected. When a tine is broken the total capacitance between the tines and the back-plate will change and will be detected, and an indication will be supplied to an operator so that the operator may stop the machine and remove the tines.

US Patent:

53693736, Nov 29, 1994

Filed:

Oct 16, 1992

Appl. No.:

7/961986

Inventors:

George F. Nelson - Coon Rapids MN
David P. Andersen - Burnsville MN

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

H03H 1900

US Classification:

327121

Abstract:

A sine wave oscillator provides an input signal to a step-recovery diode (SRD). The SRD produces a wideband series of harmonics of the frequency of the sine wave oscillator that are represented as "lines" in a power r. f. frequency plot. The output of the SRD is supplied to one or more bandpass filters or lowpass filters which provide selection windows so that only a specified number of harmonic lines are passed within a selection window. These specified harmonic lines are then coupled to one or more high speed input switches which are coupled to one or more high speed selection switches. The high speed selection switches are each coupled to a separate bandpass filter that is tuned to a different bandpass frequency range. Each bandpass filter corresponds to one or to several adjacent lines of the selection windows. The selection switches are connected so that various ones of them may be turned on to form either selective parallel or serial combinations, or even simultaneous parallel/serial compositions, of the frequency line components under the control of a digital switch controller.

US Patent:

54612292, Oct 24, 1995

Filed:

Jun 6, 1994

Appl. No.:

8/254903

Inventors:

Gerald F. Sauter - Eagan MN
George F. Nelson - Coon Rapids MN

Assignee:

Unisys Corporation - Blue Bell PA

International Classification:

G01N 2135

US Classification:

250253

Abstract:

An on-the-go probe for determining the presence of chemical residue in a soil using Transient Infrared Spectroscopy by pulling a soil implement through the soil with the soil implement having a heating or cooling source for temporarily creating a temperature differential between a layer of soil proximate the soil implement and a layer of soil remote from the soil implement, and moving the soil sufficiently fast with respect to heating source to enable measuring the radiation characteristics of the thin layer of soil before the thin layer of soil begins to self-absorb and substantially change its emission characteristics.

US Patent:

57162727, Feb 10, 1998

Filed:

Nov 5, 1996

Appl. No.:

8/744217

Inventors:

George F. Nelson - Coon Rapids MN

Assignee:

New Holland North America, Inc. - New Holland PA

International Classification:

A01E 1200

US Classification:

460 7

Abstract:

A monitor for measuring the moisture content of grain comprises an AC signal source for transmitting a measurement signal along a measurement signal path that includes a sensor region in which grain may, or may not, be present, and an analyzer for determining the attenuation of the measurement signal along the path, the analyzer producing an indication of the moisture content of grain in the sensor region that is dependent on the attenuation. A simulator is provided to permit calibration, testing, maintenance and/or demonstration of the monitor without the requirement of grain in the sensor region. The simulator includes a programmable attenuator that is selectively electrically inserted in the measurement signal path and a control circuit for controlling the attenuator so that the measurement signal is attenuated and the analyzer produces an indication of grain moisture content even though no grain is present in the sensor region. The attenuator may be a PIN diode or a programmable capacitor.

US Patent:

46895590, Aug 25, 1987

Filed:

Nov 13, 1984

Appl. No.:

6/670413

Inventors:

Roger N. Hastings - Burnsville MN
Gerald F. Sauter - Eagan MN
George F. Nelson - Coon Rapids MN

Assignee:

Sperry Corporation - Blue Bell PA

International Classification:

G01R 3302
H03K 338

US Classification:

324248

Abstract:

A SQUID, nominally of the "hybrid" type, wherein the normally superconducting modulation coil is modified to instead be a non-superconducting material, nominally manginin, exhibits reduced long-term, or d. c. , thermal response. When an alternating current waveform--rising to a nominal 130 ma. r. m. s. amplitude within a nominal 0. 5 seconds and, after a nominal 100 msec. to 20 sec. duration, returning to 0 within a nominal 0. 1 sec--is applied to the non-superconducting modulation coil of such a SQUID at superconducting temperature then the entire SQUID thermal response, particularly including the short-term, or a. c. , SQUID thermal response, is thereafter reducible to essentially 0. The process is hypothesized to "deflux" the SQUIDs of fluxons trapped during the cool-down of superconductor within the SQUID and associated circuitry. The optimal "de-fluxing" alternating current waveform for any individual SQUID is empirically derivable.

US Patent:

57083665, Jan 13, 1998

Filed:

Nov 5, 1996

Appl. No.:

8/744250

Inventors:

George F. Nelson - Coon Rapids MN

Assignee:

New Holland North America, Inc. - New Holland PA

International Classification:

G01R 2704

US Classification:

324640

Abstract:

In a grain harvester having apparatus for measuring the moisture content of grain by directing a radio frequency signal along a measurement signal path through the grain and determining the moisture content from the phase shift and attenuation experienced by the measurement signal, calibration apparatus is provided for calibrating the moisture measurement apparatus without interrupting the grain harvesting operation. An attenuator, calibrated to a traceable standard, is selectively inserted into the measurement signal path to produce an expected attenuation of the measurement signal. The actual attenuation resulting from the insertion of the attenuator is compared with the expected attenuation and the difference is used to derive a control voltage for controlling the gain of the measurement signal path.