James A Nagel

US Patent:

6881957, Apr 19, 2005

Filed:

Jan 8, 2003

Appl. No.:

10/338531

Inventors:

Brian C. Dougherty - Terre Haute IN, US
Robert M. Bunch - Terre Haute IN, US
Rachel E. Lukens - Terre Haute IN, US
James Nagel - Valparaiso IN, US
Christopher L. Wolfe - Peru IN, US

Assignee:

Home Data Source, LLC - Indianapolis IN

International Classification:

G01J005/00

US Classification:

2503383, 250DIG 1, 2503381

Abstract:

A passive low power device for detection of boundary crossings includes a dual element pyro-electric infrared (PIR) sensor. The sensor is designed with a lens that provides a very narrow field of view and two pyro-electric elements that produce a waveform with two voltage swings of opposite polarity when a warm object moves past the sensor. The waveform is filtered and amplified before it is passed on to a comparator. The comparator triggers off the extremes of each waveform. The comparator includes two outputs that are normally high, but go low when a change in infrared radiation is detected. A processor makes an approximation of the zero crossing time based on the rising edge of the first comparator output. This approximate zero crossing time serves as an estimate of the boundary crossing time.

US Patent:

20220353067, Nov 3, 2022

Filed:

Jun 28, 2022

Appl. No.:

17/851769

Inventors:

- Melbourne FL, US
JAMES A. NAGEL - FORT WAYNE IN, US
MICHAEL R. LANGE - MELBOURNE FL, US

International Classification:

H04L 9/08
H04B 10/70
H04L 9/12

Abstract:

A quantum communications system includes a communications system that operates with a quantum key distribution (QKD) system, which includes a transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node may be configured to transmit to the receiver node a bit stream of optical pulses, and switch between first and second QKD protocols based upon at least one channel condition.

US Patent:

20220271846, Aug 25, 2022

Filed:

Feb 19, 2021

Appl. No.:

17/179600

Inventors:

- MELBOURNE FL, US
FRASER R. DALGLEISH - VERO BEACH FL, US
CYPRYAN T. KLISH - MELBOURNE FL, US
JAMES A. NAGEL - FORT WAYNE IN, US

International Classification:

H04B 10/69
H04B 10/61
H04B 10/079
H04B 10/2569
H04B 10/508

Abstract:

A communications system may include a transmitter node, a receiver node, and an optical communications channel coupling the transmitter node and receiver node. The transmitter node may include a pulse transmitter and a pulse divider downstream therefrom. The receiver node may include a pulse recombiner and a pulse receiver downstream therefrom.

US Patent:

20220271847, Aug 25, 2022

Filed:

Feb 19, 2021

Appl. No.:

17/179490

Inventors:

- MELBOURNE FL, US
MICHAEL R. LANGE - MELBOURNE FL, US
JAMES A. NAGEL - FORT WAYNE IN, US

International Classification:

H04B 10/70
H04B 10/61
H04B 10/508

Abstract:

A quantum communications system may include transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node may be configured to co-propagate a first pulse for a quantum state and a second pulse to stabilize the quantum state through the quantum communications channel.

US Patent:

20210152346, May 20, 2021

Filed:

Nov 19, 2019

Appl. No.:

16/687767

Inventors:

- Melbourne FL, US
James A. Nagel - Fort Wayne IN, US
Brent W. Plansinis - Saint Cloud FL, US
Timothy C. Burt - Webster NY, US
Catheryn D. Logan - Melbourne FL, US
Michael R. Lange - Melbourne FL, US

International Classification:

H04L 9/08
H04B 10/70
H04B 10/50
H04B 10/66
H04B 10/25

Abstract:

A quantum communications system may include a transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node may cooperate with the quantum communications channel defining at least one Talbot effect image position along the quantum communications channel. The receiver node may use located along the quantum communications channel at the at least one Talbot effect image position.

US Patent:

20210135860, May 6, 2021

Filed:

Oct 30, 2019

Appl. No.:

16/668002

Inventors:

- Melbourne FL, US
James A. NAGEL - Fort Wayne IN, US
Brent W. PLANSINIS - Saint Cloud FL, US
Michael C. GARRETT - Melbourne FL, US
Timothy C. BURT - Webster NY, US
Catheryn D. LOGAN - Melbourne FL, US
Michael R. LANGE - Melbourne FL, US

International Classification:

H04L 9/08
H04B 10/70
H04B 10/516
H04B 10/66
H04B 10/2581

Abstract:

A quantum communications system may include communications system that operates with a quantum key distribution (QKD) system, which includes a transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node may cooperate with the quantum communications channel defining at least one Talbot effect image position along the quantum communications channel. The receiver node may be located along the quantum communications channel at the at least one Talbot effect image position.

US Patent:

20210135861, May 6, 2021

Filed:

Oct 30, 2019

Appl. No.:

16/668025

Inventors:

- MELBOURNE FL, US
JAMES A. NAGEL - FORT WAYNE IN, US
BRENT W. PLANSINIS - SAINT CLOUD FL, US
MICHAEL C. GARRETT - MELBOURNE FL, US
TIMOTHY C. BURT - WEBSTER NY, US
CATHERYN D. LOGAN - MELBOURNE FL, US
MICHAEL R. LANGE - MELBOURNE FL, US

International Classification:

H04L 9/08
H04B 10/70
H04B 10/516
H04B 10/66
H04B 10/2581

Abstract:

A quantum communications system includes a communications system that operates with a quantum key distribution (QKD) system, which includes a transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node may cooperate with the quantum communications channel defining a Talbot effect image position along the quantum communications channel. The receiver node is located along the quantum communications channel at a midpoint of the Talbot effect image position.

US Patent:

20210119786, Apr 22, 2021

Filed:

Oct 21, 2019

Appl. No.:

16/658398

Inventors:

- Melbourne FL, US
JAMES A. NAGEL - Fort Wayne IN, US
MICHAEL R. LANGE - Melbourne FL, US

International Classification:

H04L 9/08
H04L 9/12
H04B 10/70

Abstract:

A quantum communications system includes a communications system that operates with a quantum key distribution (QKD) system, which includes a transmitter node, a receiver node, and a quantum communications channel coupling the transmitter node and receiver node. The transmitter node may be configured to transmit to the receiver node a bit stream of optical pulses, and switch between first and second QKD protocols based upon at least one channel condition.