Lawrence D Woolf

US Patent:

8242348, Aug 14, 2012

Filed:

Aug 25, 2009

Appl. No.:

12/547198

Inventors:

Lawrence D. Woolf - Carlsbad CA, US

Assignee:

General Atomics - San Diego CA

International Classification:

H01L 35/34

US Classification:

136201, 136205, 20419212, 20419225, 257 14

Abstract:

Processes for economical large scale commercial production of blocks of quantum well particles, platelets, or continuous sheets of material imparting minimal or essentially no parasitic substrate loss in quantum well devices such as thermo-electric generators in which the blocks are embodied involve roll to roll processing, i. e. , deposition and crystallization of alternating layers of quantum well materials, on an elongate and continuous base layer of appreciable width. Blocks of quantum well materials having no attached base layer are produced on decomposable or release treated base layers.

US Patent:

20020118460, Aug 29, 2002

Filed:

Feb 26, 2001

Appl. No.:

09/793330

Inventors:

Lawrence Woolf - Carlsbad CA, US
Kirk Norton - San Diego CA, US

Assignee:

General Atomics

International Classification:

G02B027/00
G02B001/10

US Classification:

359/585000, 359/577000

Abstract:

A one-way imaging optical film is provided by a transparent polymer substrate bearing a first coating defining an image area and a second coating defining a background or surround area. In the visible light spectrum, the two coatings have very similar light transmittance characteristics and very similar reverse reflectance characteristics, but different reflectance characteristics such that when the film is viewed from the coated side the image area is visually distinct from the surround area, and when the film is viewed from the substrate side, the film is transparent and the image virtually non-discernible. The film has a visible light transmittance of at least about 25 percent for use especially as an architectural and vehicle window film.

US Patent:

20110299167, Dec 8, 2011

Filed:

Jun 7, 2010

Appl. No.:

12/795123

Inventors:

Lawrence D. Woolf - Carlsbad CA, US

Assignee:

General Atomics - San Diego CA

International Classification:

G02B 1/10
C23C 14/34
G02F 1/361
B05D 5/06

US Classification:

359586, 427162, 20419228, 252582

Abstract:

A reflective coating is disclosed that has a base layer provided with a reflective surface for reflecting electromagnetic radiation, such as visible and solar near-infrared light. The reflective coating also has a dielectric layer formed on the reflective surface, and an absorber layer. The absorber layer is formed on the dielectric layer that is formed on the base layer. The reflective coating has an average reflectance greater than about 60% for wavelengths of electromagnetic radiation in the range of 800 to 2500 nm that is irradiated upon the reflective coating. Additionally, the reflective coating has an average reflectance for wavelengths of electromagnetic radiation in the range of 400 to 700 nm irradiated upon the reflecting coating that is less than the average reflectance of the reflective coating from 800 to 2500 nm.

US Patent:

51400065, Aug 18, 1992

Filed:

Sep 21, 1990

Appl. No.:

7/586414

Inventors:

Lawrence D. Woolf - Carlsbad CA

Assignee:

General Atomics - San Diego CA

International Classification:

B05D 512

US Classification:

505 1

Abstract:

A method for heat processing a superconductor wire which has a protective silver cladding includes the steps of attaching the coated wire to a spool and then rotating the spool to wind the wire around the spool in juxtaposed coils. As the wire is being wound around the spool, the portions of the wire which are not yet coiled are drawn through a container which holds a paint that contains a silver diffusion inhibiting material. The diffusion inhibiting material is consequently deposited onto the silver cladding of the superconductor wire, and the coiled wire is subsequently placed in a furnace. The wire is heat processed in the furnace as appropriate for the particular type of superconductor material. The diffusion inhibitor material prevents diffusion of silver during the heat processing between portions of the wire which contact each other.

US Patent:

51496844, Sep 22, 1992

Filed:

Apr 9, 1991

Appl. No.:

7/682552

Inventors:

Lawrence D. Woolf - Carlsbad CA
Frederick H. Elsner - Cardiff CA
Clyde H. Shearer - Santee CA

Assignee:

General Atomics - San Diego CA

International Classification:

C01D 1102
C01D 1100
C01G 302

US Classification:

505 1

Abstract:

A process for preparing a superconductor-coated substrate including calcining a mixture of powdered yttrium or rare earth oxide (R), barium carbonate and copper oxide in a controlled atmosphere and in accordance with a predetermined temperature profile to form a superconductor powder having a stoichiometric ratio of R-Ba-Cu of approximately 1-2-3. The melting transition width of the resulting powder is relatively narrow, such that the melting onset temperature is above the high temperatures advantageously used to sinter the powder on the substrate.

US Patent:

51186632, Jun 2, 1992

Filed:

Sep 21, 1990

Appl. No.:

7/586450

Inventors:

Lawrence D. Woolf - Carlsbad CA
Michael V. Fisher - San Diego CA
William A. Raggio - Del Mar CA
Frederick H. Elsner - Carlsbad CA

Assignee:

General Atomics - San Diego CA

International Classification:

H01B 1200

US Classification:

505 1

Abstract:

A method and apparatus for manufacturing a superconductor wire has a wire take-up spool and a feed speed control spool. A wire substrate is taken from the feed speed control spool and onto the take-up spool as the wire take-up spool is rotated. The wire passes through a container which holds a diffusion barrier material, where the diffusion barrier material is electrophoretically deposited onto the wire substrate and subsequently sintered. The wire is also passed through a container which holds a superconductor material suspended in solution, and a layer of the superconductor material is electrophoretically deposited onto the diffusion barrier. The grains of the superconductor layer are then magnetically aligned and sintered. Also, a silver coating is electrophoretically deposited onto the superconductor layer and sintered. A diffusion bonding inhibitor material is then applied to the silver coating.

US Patent:

45414114, Sep 17, 1985

Filed:

Jul 10, 1984

Appl. No.:

6/629356

Inventors:

Lawrence D. Woolf - Carlsbad CA

Assignee:

GA Technologies Inc. - San Diego CA

International Classification:

A47J 2700

US Classification:

126390

Abstract:

Multi-ply cookware having inner and outer plies of aluminum or stainless steel encasing an intermediate ply of a graphite material. The graphite material, which has thermally anisotropic properties, is oriented so that its thermal conductivity is higher in the plane parallel to the surface of the cookware than in the direction perpendicular to the surface. Accordingly, when the cookware is placed over a localized heat source, the intermediate graphite ply effectively conducts and distributes the heat provided by the burner throughout the plane parallel to the surface of the cookware before the heat propagates in the direction perpendicular to the surface of the cookware, thus minimizing hot spots on the inner surface.

US Patent:

52003914, Apr 6, 1993

Filed:

Sep 24, 1990

Appl. No.:

7/587230

Inventors:

Michael V. Fisher - San Diego CA
Kurt M. Schaubel - Cardiff CA
Lawrence D. Woolf - Carlsbad CA
Robert A. Olstad - San Diego CA
William A. Raggio - Del Mar CA

Assignee:

General Atomics - San Diego CA

International Classification:

H01B 1200

US Classification:

505 1

Abstract:

A process for joining ceramic superconductor fibers with a channel to fabricate a superconductor wire includes concertedly drawing the fibers and the channel together to feed the fibers into the channel. A flowable solder paste is continuously dispensed into the channel over the fibers. The combination of channel, fibers and solder paste is then subjected to a rapid rise in temperature which melts the solder. The molten solder is then frozen to encase the fibers in the solder and attach the solder to the channel to create a superconductor wire.