James Francis Blake

US Patent:

6574015, Jun 3, 2003

Filed:

May 18, 1999

Appl. No.:

09/314240

Inventors:

Alexander Tselikov - Fremont CA
Jeffrey P. Wilde - Los Gatos CA
James Blake - Paradise Valley AZ

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

H04K 300

US Classification:

359111, 359156, 359160, 359161

Abstract:

A system and method for achieving, while using a laser and optical fibers, high signal-to-noise ratio. In particular, the system splits an incoming main light signal into two orthogonal polarization states, which then propagate through an optical circuit before recombining. The use of appropriate path differences ensures that the system is immune from the conversion of mode partition noise to intensity noise arising from the interference between parasitic light waves which traveled through the system in undesired polarization states.

US Patent:

20050284084, Dec 29, 2005

Filed:

Jun 4, 2004

Appl. No.:

10/861676

Inventors:

James Blake - Palo Alto CA, US

International Classification:

E04C003/30

US Classification:

052720100

Abstract:

My invention, the Shear Wall Aspect Ratio Reducing Frame is a simple, economical, efficient, easy to install device that allows greater oppotunity and flexibility in the size and location of openings in the walls of wood frame constructed buildings particularly houses. The ARRF would replace the commercial, pre-fabricated systems now in use which are costly and inefficient labor-intensive shear wall devices. The ARRF achieves its goal by reducing the moment arm in the overturning equations that are used to determine the uplift forces in a shear wall. The ARRF reduces forces in walls rather than increase their bulk which is the strategic concept now in use throughout the design professions and the construction industry to solve the aspect ratio problem.

US Patent:

49154680, Apr 10, 1990

Filed:

Sep 16, 1988

Appl. No.:

7/245717

Inventors:

Byoung Y. Kim - Menlo Park CA
James N. Blake - Phoenix AZ

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Stanford CA

International Classification:

G02B 602
G02B 626

US Classification:

350 9615

Abstract:

An apparatus utilizes a two-mode optical waveguide with a non-circular core to provide stable spatial intensity patterns in both propagation modes for light propagating therein. The light has a wavelength, and the non-circular core has cross-sectional dimensions selected such that (1) the waveguide propagates light at that wavelength in a fundamental mode and a higher order mode, and (2) substantially all of the light in the higher order mode propagates in only a single, stable intensity pattern. Embodiments of the invention include, for example, modal couplers, frequency shifters, mode selectors and interferometers. One of the interferometer embodiments may be used as a strain gauge.

US Patent:

50227327, Jun 11, 1991

Filed:

Apr 25, 1989

Appl. No.:

7/342947

Inventors:

Helge E. Engan - Trondheim, NO
Byoung Y. Kim - Menlo Park CA
James N. Blake - Phoenix AZ
Herbert J. Shaw - Stanford CA

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Stanford CA

International Classification:

G02B 626
G02B 602

US Classification:

350 9615

Abstract:

An optical fiber is subjected to a series of traveling flexural waves propagating along a length of the fiber. At least a portion of an optical signal propagating within the optical fiber in a first propagation mode is coupled to a second propagation mode. The optical signal in the second propagation mode has a frequency which is equal to either the sum of or the difference between the frequency of the optical signal in the first propagation mode and the frequency of the traveling flexural waves. The frequency of the optical signal in the second propagation mode is shifted upward or downward from the frequency of the optical signal in the first propagation mode as determined by the direction of propagation of the first optical signal with respect to the direction of propagation of the traveling flexural waves, and as also determined by whether the phase propagation velocity of the optical signal in the first propagation mode is greater than or less than the propagation velocity of the optical signal in the second propagation mode. An acoustic wave is induced in a generator having a gradual tapered cross-section. The generator preferably has the shape of a horn and is coaxially mounted with said optical fiber, so as to suppress the acoustic wave induced in the optical fiber in the reverse direction.

US Patent:

48324370, May 23, 1989

Filed:

May 11, 1987

Appl. No.:

7/048142

Inventors:

Byoung Y. Kim - Menlo Park CA
Herbert J. Shaw - Stanford CA
Helege E. Engan - Trondheim, NO
James N. Blake - Mountain View CA

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Stanford CA

International Classification:

G02B 626
G02B 602

US Classification:

350 9615

Abstract:

An optical fiber is subjected to a series of traveling flexural waves propagating along a length of the fiber. At least a portion of an optical signal propagating within the optical fiber in a first propagation mode is coupled to a second propagation mode. The optical signal in the second propagation mode has a frequency which is equal to either the sum of or the difference between the frequency of the optical signal in the first propagation mode and the frequency of the traveling flexural waves. The frequency of the optical signal in the second propagation mode is shifted upward or downward from the frequency of the optical signal in the first propagation mode as determined by the direction of propagation of the first optical signal with respect to the direction of propagation of the traveling flexural waves, and as also determined by whether the phase propagation velocity of the optical signal in the first propagation mode is greater than or less than the propagation velocity of the optical signal in the second propagation mode.

US Patent:

20190208916, Jul 11, 2019

Filed:

Mar 11, 2019

Appl. No.:

16/299053

Inventors:

James Francis Blake - Prescott Valley AZ, US

International Classification:

A47C 12/00
B25H 3/02

Abstract:

A position adjustable support assembly is convertible from a tool case, to a step stool. A segmented position adjustable support assembly has a center assembly and a left and right assembly. The left and right assemblies are rotatable about the center assembly and the vertical supports of the center, left and right assemblies can be retained in base and top-receivers of a tool case. Retainers may secure the segmented assembly to the base and top. The top may convert to a top-step and the base may be utilized as a bottom step of a stepstool. A pair of legs may extend from the re-positioned top cover and these legs may be retained by a top-step retainer assembly that may be coupled to the base; thereby providing stability for the stepstool.

US Patent:

20180333839, Nov 22, 2018

Filed:

Feb 2, 2018

Appl. No.:

15/887416

Inventors:

James Francis Blake - Prescott Valley AZ, US

International Classification:

B25H 3/02
B25H 3/04
A47F 5/00

Abstract:

A position adjustable support assembly is convertible to and from a tool case, to allow transport with a plurality of articles attached thereto. A segmented position adjustable support assembly has a center assembly and a left and right assembly. The left and right assemblies are rotatable about the center assembly and the vertical supports of the center, left and right assemblies can be retained in base and top-receivers of a tool case. Retainers may secure the segmented assembly to the base and top. This allows a user to mount the segmented assembly in a first work location, and then convert the segmented assembly to a tool case for transport to a second work location.