Robert C Fleming

US Patent:

6879398, Apr 12, 2005

Filed:

May 22, 2002

Appl. No.:

10/152756

Inventors:

VanWinkle T. Townsend - Herndon VA, US
Robert H. Fleming - Manassas VA, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01N015/02

US Classification:

356336, 356339

Abstract:

An apparatus for detecting particles in a sample of gas is disclosed. The apparatus comprises a single optical radiation source, a sensor head, and detection electronics. The sensor head comprises a housing having an elliptical cross section. The sensor head receives optical radiation from the source through a fiber optic line at the first focus, and a detector is located at the second focus. The detector receives radiation scattered and emitted by particles in the light beam at the first focus. The detection electronics determine the presence, and in one embodiment the identity, of particles based on the radiation incident on the detector.

US Patent:

47647698, Aug 16, 1988

Filed:

Oct 19, 1983

Appl. No.:

6/543522

Inventors:

Robert G. Hayworth - Vienna VA
Ray E. Russell - Vienna VA
Robert F. Fleming - Vienna VA
James G. Hwang - Vienna VA

Assignee:

Vega Precision Laboratories, Inc. - Vienna VA

International Classification:

G01S 1386

US Classification:

342 50

Abstract:

Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with the transmitter's PRF, by combining a number of noise reduction devices. These include the redundant transmission of address and channel information, the transmission of true and complemented data, the tracking of channels transmitted in a predetermined order, developing an interference count to recognize synchronous pulses, comparing data received for a given channel with data subsequently received for that channel, the use of windows around the expected positions of pulses, and the use of parity. There is also a novel programming arrangement which enables several programs to be stored in a reduced amount of memory space.

US Patent:

46270752, Dec 2, 1986

Filed:

Oct 19, 1983

Appl. No.:

6/543404

Inventors:

Robert F. Fleming - Vienna VA
Raymond F. Irby - Vienna VA

Assignee:

Vega Precision Laboratories, Inc. - Vienna VA

International Classification:

H03K 704

US Classification:

375 23

Abstract:

Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with the transmitter's PRF, by combining a number of noise reduction devices. These include the redundant transmission of address and channel information, the transmission of true and complemented data, the tracking of channels transmitted in a predetermined order, developing an interference count to recognize synchronous pulses, comparing data received for a given channel with data subsequently received for that channel, the use of windows around the expected positions of pulses, and the use of parity. There is also a novel programming arrangement which enables several programs to be stored in a reduced amount of memory space.

US Patent:

62123602, Apr 3, 2001

Filed:

Mar 31, 1998

Appl. No.:

9/050972

Inventors:

Robert F. Fleming - Derwood MD
William A. Check - Great Falls VA
Joseph A. Chisholm - Manassas VA
Brian J. Glinsman - Herndon VA
David B. Kim - Great Falls VA
Ronald L. Kronz - Fairfax VA

Assignee:

GE Capital Spacenet Services, Inc. - McLean VA

International Classification:

H04B 7185

US Classification:

455 134

Abstract:

A method is shown for providing stable communication between a hub earth-station and a VSAT earth-station by regulating the power of signals transmitted via a satellite. In this method, the hub receives a beacon signal from the satellite and a previous outbound signal. The hub then regulates the power of an outbound signal transmitted by the hub to VSAT via the satellite, based on either the beacon signal or the previous outbound signal. The hub then sends a current outbound signal, including signal data and parameter data to the VSAT via the satellite. The VSAT receives the current outbound signal and determines a number of signal properties pertaining to the current outbound signal. The VSAT then regulates the power of an inbound signal transmitted by the VSAT to the hub via the satellite, based on the signal properties, the parameter data, and a set of reference data.

US Patent:

62822322, Aug 28, 2001

Filed:

Apr 1, 1998

Appl. No.:

9/053024

Inventors:

Robert F. Fleming - Derwood MD
William A. Check - Great Falls VA
Joseph A. Chisholm - Manassas VA
Brian J. Glinsman - Herndon VA
David B. Kim - Great Falls VA
Ronald L. Kronz - Fairfax VA
David G. Decker - Sunnyvale CA
Norman F. Krasner - San Carlos CA

Assignee:

Spacenet, Inc. - McLean VA

International Classification:

H04L 2714
H04L 27148

US Classification:

375147

Abstract:

A method and apparatus for receiving and processing burst-mode code-division multiple access (CDMA) direct-sequence spread-spectrum (DSSS) signals is provided. In this apparatus and method, a number of demodulators are provided in a set enumerated order. Each demodulator is either "ready," meaning that it is free to process signals, or busy meaning that it is currently processing a signal. The ready demodulators each receive an input IF signal and try to detect a preamble in the IF signal. Once they detect the preamble, each ready demodulator then sends a request signal to an arbitrator. In response to a received request signal, the arbitrator sends a grant signal to the first ready demodulator in the enumerated order. This grant signal passes through each busy demodulator that is higher in the enumerated order than the first ready demodulator. The first ready demodulator then begins processing the signal, and is moved from the set of ready demodulators to the set of busy demodulators.

US Patent:

46283129, Dec 9, 1986

Filed:

Oct 19, 1983

Appl. No.:

6/543405

Inventors:

James G. Hwang - Vienna VA
Robert F. Fleming - Vienna VA
Robert G. Hayworth - Vienna VA

Assignee:

Vega Precision Laboratories, Inc. - Vienna VA

International Classification:

H04Q 700

US Classification:

340825640

Abstract:

Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with the transmitter's PRF, by combining a number of noise reduction devices. These include the redundant transmission of address and channel information, the transmission of true and complemented data, the tracking of channels transmitted in a predetermined order, developing an interference count to recognize synchronous pulses, comparing data received for a given channel with data subsequently received for that channel, the use of windows around the expected positions of pulses, and the use of parity. There is also a novel programming arrangement which enables several programs to be stored in a reduced amount of memory space.

US Patent:

46474250, Mar 3, 1987

Filed:

Jan 30, 1984

Appl. No.:

6/575130

Inventors:

Joseph A. Battaglia - Forest Hills PA
Robert W. Fleming - Monroeville PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G21C 1932

US Classification:

376308

Abstract:

A procedure for vacuum degassing of a reactor coolant system which basically utilizes existing equipment to degas and refill the coolant system. The level of radiogas and non-radiogas concentration is reduced to low residual levels in less than two hours to expedite shutdown operations. The procedure enhances residual heat removal by using the steam generators as reflux condensers. During draindown of the reactor coolant to the midplane of the reactor vessel outlet nozzles, a two-phase pump is used and a vacuum is established in the vapor space created in the reactor pressure vessel, and the steam generators.