Harry R Clark

US Patent:

20120188474, Jul 26, 2012

Filed:

Jul 28, 2011

Appl. No.:

13/192523

Inventors:

Robert K. Reich - Tyngsborough MA, US
Harry R. Clark - Townsend MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G02F 1/13357

US Classification:

349 22

Abstract:

The imager includes a lens for focusing infrared light forming a thermal image onto a liquid crystal array thereby changing the temperature of the liquid crystals to alter a physical property of the liquid crystals. A source of visible polarized light is arranged to illuminate the liquid crystal array so that the polarization of light reflected from the liquid crystal array varies with changes in temperature of the liquid crystals. A cross polarizer receives and transmits therethrough the light reflected from the liquid crystal array, the cross polarizer adapted to change the intensity of the light. An imager receives and detects the change in intensity of the light from the cross polarizer so that the thermal image is recreated as an electronic signal. In a preferred embodiment, the physical property is index of refraction and the liquid crystal array includes birefringent nematic liquid crystals.

US Patent:

56908075, Nov 25, 1997

Filed:

Aug 3, 1995

Appl. No.:

8/510802

Inventors:

Harry R. Clark - Townsend MA
Brian S. Ahern - Boxboro MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

C25F 312

US Classification:

205655

Abstract:

The invention provides a method for producing semiconductor particles in which a semiconductor material of the type for which particles are desired is placed in an electrolytic solution of an anodic cell. The anodic cell is configured with a cathode also positioned in the electrolytic solution. The electrolytic solution of the anodic cell includes an etchant and a surfactant that is characterized by an attractive affinity for the semiconductor material. To produce semiconductor particles from the semiconductor material, an electrical potential is applied between the semiconductor material in the electrolytic solution and the cathode in the electrolytic solution to anodically etch the semiconductor material. During the etch process, particles of the semiconductor material form and are encapsulated by the surfactant. This method for producing semiconductor particles uses an uncomplicated apparatus and procedure that results in inexpensive and high-volume production of particles of a semiconductor material.

US Patent:

58005765, Sep 1, 1998

Filed:

Nov 13, 1996

Appl. No.:

8/747862

Inventors:

Keith H. Johnson - Cambridge MA
Bin Zhang - Milpitas CA
Harry C. Clark - Townsend MA

Assignee:

Quantum Energy Technologies Corporation - Cambridge MA

International Classification:

C01L 132

US Classification:

44301

Abstract:

The present invention provides water cluster compositions characterized by high oxygen reactivity due to protruding, delocalized p. pi. orbitals. The invention also provides methods of producing the structures. The invention further provides methods of using the water clusters, for example in combustion, and compositions associated therewith.

US Patent:

55128084, Apr 30, 1996

Filed:

Apr 7, 1994

Appl. No.:

8/224041

Inventors:

Harry R. Clark - Townsend MA
Gerald W. Iseler - Chelmsford MA
Brian S. Ahern - Boxboro MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

B26D 306

US Classification:

318575

Abstract:

An instrument for forming nanometric features on surfaces of materials having a motor driven support for moving a workpiece on an X-Y-Z axis, a scribing tool of nanometric proportion engagable with the workpiece and a laser system for sensing movement. The tool is mounted on piezoelectric actuating means and the entire system is under the control of a programmed computer processing unit.

US Patent:

54116546, May 2, 1995

Filed:

Jul 2, 1993

Appl. No.:

8/086821

Inventors:

Brian S. Ahern - Boxboro MA
Keith H. Johnson - Cambridge MA
Harry R. Clark - Townsend MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

C25B 900
C25B 1108
C25C 700
C25C 702

US Classification:

204242

Abstract:

For a condensed matter system containing a guest interstitial species such as hydrogen or its isotopes dissolved in the condensed matter host lattice, the invention provides tuning of the molecular orbital degeneracy of the host lattice to enhance the anharmonicity of the dissolved guest sublattice to achieve a large anharmonic displacement amplitude and a correspondingly small distance of closest approach of the guest nuclei. The tuned electron molecular orbital topology of the host lattice creates an energy state giving rise to degenerate sublattice orbitals related to the second nearest neighbors of the guest bonding orbitals. Thus, it is the nuclei of the guest sublattice that are set in anharmonic motion as a result of the orbital topology. This promotion of second nearest neighbor bonding between sublattice nuclei leads to enhanced interaction between nuclei of the sublattice. In the invention, a method for producing dynamic anharmonic oscillations of a condensed matter guest species dissolved in a condensed matter host lattice is provided.

US Patent:

59923547, Nov 30, 1999

Filed:

Sep 18, 1996

Appl. No.:

8/715810

Inventors:

Brian S. Ahern - Boxboro MA
Harry R. Clark - Townsend MA
Keith H. Johnson - Cambridge MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

F02B 302
F02B 4702
F02P 2304

US Classification:

123 25B

Abstract:

The invention provides a scheme for combusting a hydrocarbon fuel to generate and extract enhanced translational energy. In the scheme, hydrocarbon fuel is nanopartitioned into nanometric fuel regions each having a diameter less than about 1000 angstroms; and either before or after the nanopartitioning, the fuel is introduced into a combustion chamber. In the combustion chamber, a shock wave excitation of at least about 50,000 psi and with an excitation rise time of less than about 100 nanoseconds is applied to the fuel. A fuel partitioned into such nanometric quantum confinement regions enables a quantum mechanical condition in which translational energy modes of the fuel are amplified, whereby the average energy of the translational energy mode levels is higher than it would be for a macro-sized, unpartitioned fuel. Combustion of such a nanopartitioned fuel provides enhanced translational energy extraction by way of, e. g. , a reciprocating piston because only the translational energy mode of combustion products appreciably contributes to momentum exchange with the piston.

US Patent:

56746326, Oct 7, 1997

Filed:

Oct 28, 1994

Appl. No.:

8/331014

Inventors:

Brian S. Ahern - Boxboro MA
Keith H. Johnson - Cambridge MA
Harry R. Clark - Townsend MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

B32B 3300

US Classification:

428612

Abstract:

For a condensed matter system containing a guest interstitial species such as hydrogen or its isotopes dissolved in the condensed matter host lattice, the invention provides tuning of the molecular orbital degeneracy of the host lattice to enhance the anharmonicity of the dissolved guest sublattice to achieve a large anharmonic displacement amplitude and a correspondingly small distance of closest approach of the guest nuclei. The tuned electron molecular orbital topology of the host lattice creates an energy state giving rise to degenerate sublattice orbitals related to the second nearest neighbors of the guest bonding orbitals. Thus, it is the nuclei of the guest sublattice that are set in anharmonic motion as a result of the orbital topology. This promotion of second nearest neighbor bonding between sublattice nuclei leads to enhanced interaction between nuclei of the sublattice. In the invention, a method for producing dynamic anharmonic oscillations of a condensed matter guest species dissolved in a condensed matter host lattice is provided.

US Patent:

62350676, May 22, 2001

Filed:

Sep 19, 1997

Appl. No.:

8/933787

Inventors:

Brian S. Ahern - Boxboro MA
Harry R. Clark - Townsend MA
Keith H. Johnson - Cambridge MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

B01J 1300

US Classification:

44301

Abstract:

The invention provides a scheme for combusting a hydrocarbon fuel to generate and extract enhanced translational energy. In the scheme, hydrocarbon fuel is nanopartitioned into nanometric fuel regions each having a diameter less than about 1000 angstroms; and either before or after the nanopartitioning, the fuel is introduced into a combustion chamber. In the combustion chamber, a shock wave excitation of at least about 50,000 psi and with an excitation rise time of less than about 100 nanoseconds is applied to the fuel. A fuel partitioned into such nanometric quantum confinement regions enables a quantum mechanical condition in which translational energy modes of the fuel are amplified, whereby the average energy of the translational energy mode levels is higher than it would be for a macro-sized, unpartitioned fuel. Combustion of such a nanopartitioned fuel provides enhanced translational energy extraction by way of, e. g. , a reciprocating piston because only the translational energy mode of combustion products appreciably contributes to momentum exchange with the piston.