Thomas G Russell

US Patent:

6660994, Dec 9, 2003

Filed:

Sep 26, 2001

Appl. No.:

09/963948

Inventors:

Gerardo I. Pangilinan - Alexandria VA
Thomas P. Russell - Manassas Park VA

Assignee:

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

International Classification:

G01B 1116

US Classification:

25022714, 73800, 73705, 385 12, 250225

Abstract:

An apparatus for measuring pressure in a medium includes a laser for emitting linearly polarized light; a polarizing beam splitter that reflects the linearly polarized light from the laser; a first lens that receives and focuses the linearly polarized light from the polarizing beam splitter; an optical fiber having first and second ends, the first end for receiving the linearly polarized light from the first lens, the second end comprising a tip disposed in the medium, the tip receiving reflected light from the medium, the reflected light being transmitted back through the optical fiber and the first lens to the polarizing beam splitter; the polarizing beam splitter transmitting the reflected light that has polarization orthogonal to the linearly polarized light emitted by the laser but not transmitting the reflected light that has polarization substantially parallel to the linearly polarized light emitted by the laser; a second lens for receiving the reflected light that has polarization orthogonal to the linearly polarized light emitted by the laser; a photodiode for receiving the orthogonal reflected light from the second lens; an oscilloscope connected to the photodiode; and a delay generator connected to the photodiode, the oscilloscope and the laser.

US Patent:

6756579, Jun 29, 2004

Filed:

Mar 27, 2002

Appl. No.:

10/106763

Inventors:

Gerardo I. Pangilinan - Alexandria VA
Thomas P. Russell - Manassas Park VA

Assignee:

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

International Classification:

G01B 1116

US Classification:

25022714, 25022718, 73655, 385 12

Abstract:

An apparatus for measuring pressure in a medium comprises a laser for emitting light; a dichroic beam splitter that reflects the light from the laser; a first lens that receives and focuses the light from the beam splitter; a first optical fiber for receiving the light from the first lens; a crystal having fluorescence properties and having a hemispherical shape, the crystal being attached to an end of the first optical fiber; a second lens that receives and focuses fluorescence generated by the crystal and reflected by the dichroic beam splitter; a second optical fiber for receiving the fluorescence from the second lens; a spectrometer that receives the fluorescence from the second optical fiber; a streak camera connected to the spectrometer; a charge-coupled device connected to the spectrometer; and a delay generator connected to the charge-coupled device, the streak camera and the laser.

US Patent:

57807698, Jul 14, 1998

Filed:

Aug 26, 1996

Appl. No.:

8/708001

Inventors:

Thomas P. Russell - Manassas Park VA
Indu B. Mishra - Columbia MD

Assignee:

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

International Classification:

C06B 3100
C06B 2534
C01B 2120
C07C11100

US Classification:

149 45

Abstract:

The thermal stability of an N,N-dinitramide salt of the formula M. sup. + �N(NO. sub. 2). sub. 2 !. sup. - where M. sup. + is a nitrogen-containing cation, is improved by mixing with the N,N-dinitramide salt a compound of the formula ##STR1## where R, R' and R" are the same or different and are aryl or alkyl. A new composition of matter is formed by mixing the N,N-dinitramide salt and the prophosphatrane compound.

US Patent:

57786240, Jul 14, 1998

Filed:

Oct 25, 1996

Appl. No.:

8/736654

Inventors:

Thomas C. Russell - Marietta GA

International Classification:

E04G 2302

US Classification:

52514

Abstract:

A wallboard patching element is collapsible to fit through a hole in the wallboard. Using a handle, the element is moved through the hole and inside the wall adjacent to the hole. Once inside the wall, the element is released into a fully deployed condition with part of the element larger than the hole. The patching element has adhesive on portions that contact the wall, and is moved into contact with the wall. Once the patching element is fixed to the wall, the handle is removed, and tape or other patching material is used to fill in any gaps remaining between the patching element and the wall.

US Patent:

60439181, Mar 28, 2000

Filed:

Dec 12, 1997

Appl. No.:

8/989467

Inventors:

Joseph McAlpin Bozzay - Leesburg VA
Richard C. Thuss - Holland PA
James Howard Leveque - Reston VA
Thomas A. Russell - Arlington VA

Assignee:

Stanford Telecommunications, Inc. - Reston VA

International Classification:

H04B 1000

US Classification:

359172

Abstract:

A laser satellite communication system which avoids atmospheric, wind and turbulence effects. A satellite or high altitude platform communication system includes an earth-orbiting satellite or high altitude platform carrying a laser communications receiver and an acknowledgement transmitter. A ground terminal having a laser communications transmitter which is caused to continuously transmit large data block signals. When one block of data signals is received at the satellite or platform, an acknowledgement signal is sent to earth from the satellite or platform. The ground terminal receives the acknowledgement signal and causes the ground terminal laser communication transmitter to continuously transmit the next succeeding large block data signals. This process is repeated until all of the data has been received by the earth-orbiting satellite or high altitude platform, whereby all of the large data block signals are received by the laser communication receiver through scintillation windows in the atmosphere.

US Patent:

D3675963, Mar 5, 1996

Filed:

Aug 31, 1994

Appl. No.:

D/027772

Inventors:

Thomas C. Russell - Marietta GA

US Classification:

D 8 14

US Patent:

53602862, Nov 1, 1994

Filed:

Dec 3, 1992

Appl. No.:

7/985257

Inventors:

Thomas W. Russell - Springfield VA

International Classification:

E01F 1300

US Classification:

404 6

Abstract:

A highway safety traffic barrier comprises a plurality of strips cut from the treads of discarded motor vehicle tires and straightened to define substantially elongated members which are then assembled upon each other linearly, transversely or a combination of both. The assembled strips are bonded together to define an elongated impact absorbing structure having a predetermined cross-sectional shape. A process is also disclosed.