Henry T Lee

US Patent:

7071866, Jul 4, 2006

Filed:

Mar 26, 2004

Appl. No.:

10/809369

Inventors:

David R. Iny - Baltimore MD, US
Mark D. Stenoien - Columbia MD, US
Henry E. Lee - Ellicott City MD, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01S 13/74

US Classification:

342 42, 375130

Abstract:

An airborne radar interrogates tags on friendly ground vehicles, which when interrogated by a downlink signal from the radar, sends back a very low level uplink message signal that appears noise-like so as to avoid enemy detection and exploitation. This is achieved by retransmitting a time delayed and phase shifted version of the transmitted pulse from the radar. The digital RF tag captures every other pulse from the radar and transmits a digitally coded spread spectrum pulse back to the radar during every other intervening pulse which includes a pseudo random delay (range hop) and a pseudo random phase (direction).

US Patent:

8479601, Jul 9, 2013

Filed:

Aug 3, 2010

Appl. No.:

12/849040

Inventors:

Henry Yu-Heng Lee - Chicago IL, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F16H 21/18

US Classification:

74 47, 74 49

Abstract:

A gearless transmission mechanism includes a plurality of identical linkages, each having an off-center center of rotation, an input end and an output end. The linkages being connected to each other such that the input end of one linkage is connected to the output end of another linkage. When force is applied to the input end of one linkage an output force results in the output end of the other linkage, which is not connected thereby resulting in force reduction.

US Patent:

20130214605, Aug 22, 2013

Filed:

Feb 17, 2012

Appl. No.:

13/399407

Inventors:

Arthur EVANS - Chicago IL, US
Henry Yu-Heng LEE - Dublin CA, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

H02B 1/24

US Classification:

307 80

Abstract:

A transfer switch including: a bus bar; a track parallel to the bus bar; a first power source connection proximate to the track; a second power source connection proximate to the track offset along the track from the first power source connection; a conductive core slidably coupled to the track, wherein the core includes a deformable array of conductive sections and the array includes contacting surfaces on opposite sides of the array; wherein the conductive core has a first position providing a conductive coupling between the bus bar and the first power source and a second position providing a conductive coupling between the bus bar and the second power source.

US Patent:

43131166, Jan 26, 1982

Filed:

Jan 30, 1980

Appl. No.:

6/116681

Inventors:

Norman F. Powell - Ilchester MD
Henry E. Lee - Columbia MD
Francisco J. Guillen - Ellicott City MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H04B 700

US Classification:

343100LE

Abstract:

A system for adjusting the sidelobe response of a main antenna is disclosed. This iterative process results permits the sidelobe canceling in sequential step reduction in interference thereby greatly reducing the time required to respond to changes in the characteristics of the interference. The response of the phased array is adjusted by combining the composite signal from the main antenna with signals from auxiliary channels which have an adjustable phase and amplitude. The desired amplitude and phase of the auxiliary channels is determined using an iterative mathematical process which emphasizes the most recent data. Emphasizing the most recent data permits the system to be used in the scanning mode or to reduce interference from moving sources.

US Patent:

52949338, Mar 15, 1994

Filed:

Jan 29, 1993

Appl. No.:

8/010938

Inventors:

Henry E. Lee - Ellicott City MD
James H. Mims - Millersville MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01S 13536

US Classification:

342159

Abstract:

A wideband radar apparatus is provided having improved interference suppression characteristics. The known time versus bandwidth characteristic of the transmitted pulse is utilized to effect intermediate frequency bandwidth reduction in received swath echo signals. During the interpulse period, basebanded swath echo signals are then subjected to a series of adaptive interference suppressing updates. The adaptive weight vector produced during each of these updates is then applied to the same data used to generate the weights. Preferably, adaptive weight generation is performed in a systolic array according to a QR decomposition algorithm.

US Patent:

51929562, Mar 9, 1993

Filed:

Nov 13, 1991

Appl. No.:

7/790909

Inventors:

Henry E. Lee - Ellicott City MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01S 7288
G01S 1330

US Classification:

342204

Abstract:

The present invention is a system that performs code compression in stages where each stage includes two processing paths 36 and 38. The two paths allow bidirectional crossover cascade complementary code compression reducing the number processing stages to log. sub. 2 N and reducing the number of processing by a factor of N/(2 log. sub. 2 N) where N is the length of the code. Each path includes a delay provided by a delay unit 44 and each path arithmetically combines the data from its own path with data from the other path. The upper path 36 uses an adder 40 while the lower path uses an adder/substracter unit 42 which adds or subtracts depending on the phase of the transmitted complementary phase code. The delay provided in each stage increases in a binary progression with the delay of the last stage being N/2. A systolic processor 68 is the preferred embodiment although the invention could be implemented in a programmable digital signal processor.

US Patent:

63299445, Dec 11, 2001

Filed:

May 12, 2000

Appl. No.:

9/569931

Inventors:

David L. Richardson - Arlington Heights IL
Scott A. Stratmoen - Arlington Heights IL
Giora A. Bendor - Columbia MD
Henry E. Lee - Ellicott City MD
Martin J. Decker - Baltimore MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01S 1376

US Classification:

342 42

Abstract:

A method of communicating to a RF tag having a low power mode and a scan mode with a radar and an interrogator. The method comprises the steps of alternating the RF tag between the low power mode and the scan mode and then transmitting a wake-up call to the RF tag with the radar. Next, the wake-up call is received from the radar by the RF tag when the RF tag is in the scan mode. Once the wake-up call has been received, the radar will transmit a downlink message to the RF tag. Upon receipt of the downlink message, the RF tag will send an uplinked message to the radar. After the uplink message has been sent to the radar, the RF tag will return to the low power mode. By alternating the RF tag between the low power mode and the scan mode, the power consumption of the RF tag is greatly reduced thereby increasing the battery life thereof.

US Patent:

54423643, Aug 15, 1995

Filed:

Jul 22, 1993

Appl. No.:

8/094957

Inventors:

Henry E. Lee - Ellicott City MD
Martin J. Decker - Baltimore MD
Stephen Warejko - Pasadena MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H01Q 322
G01S 1300

US Classification:

342372

Abstract:

A method and apparatus for controlling a radar beam emitted by a radar sym. The invention produces improved high resolution ground mapping by aligning the antenna isogain or isonull lines with the ground radial lines. The antenna axis is rolled by an angle determined from the geometric principles of the unit vectors along the ground radial lines. A new azimuth pointing angle is then computed and implemented. A new azimuth beamshape, azimuth beamwidth and azimuth beam spoiling factor are also computed and implemented.