David P Welch

US Patent:

7105801, Sep 12, 2006

Filed:

Apr 2, 2004

Appl. No.:

10/817080

Inventors:

Andrew Daniel Campany - Valencia CA, US
Brian John Roth - Pasadena CA, US
David Brian Welch - Santa Clarita CA, US

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

G01D 5/34

US Classification:

25023113, 250233, 341 13

Abstract:

An actuator comprising a motor for rotating a shaft connected via a gear train to an output device; an interrupter vane connected to the output device and adapted to travel in a path corresponding to the movement of the output device; and at least two interrupter switches, such as opto-interrupter switches, spaced apart from one another along the path of the interrupter vane at locations corresponding to travel limits of the output device. A controller energizes the motor in response to a command signal and de-energizes the motor in response to an indication from one of the interrupter switches that the output device is at or approaching one of the travel limits. The actuator may be a rotary or linear actuator, and may be particularly well-suited for avionics applications.

US Patent:

7303481, Dec 4, 2007

Filed:

Feb 4, 2005

Appl. No.:

11/051531

Inventors:

Andrew D. Campany - Valencia CA, US
David B. Welch - Santa Clarita CA, US
Andrew L. Vasquez - Valencia CA, US

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

F16D 3/76

US Classification:

464 89, 464DIG 900, 251129

Abstract:

An actuator for use in a fuel system. The actuator has a first metallic section adapted to be coupled to a motor, a second metallic section adapted to be coupled to a valve, and a nonmetallic section coupled to the first and second metallic sections for transmitting torque from the first metallic section to the second metallic section.

US Patent:

7717397, May 18, 2010

Filed:

Aug 15, 2007

Appl. No.:

11/893336

Inventors:

Andrew D. Campany - Valencia CA, US
David B. Welch - Santa Clarita CA, US
Andrew L. Vasquez - Valencia CA, US

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

F16K 31/02
F16D 3/00
F16D 3/18

US Classification:

25112911, 464900, 464154, 464 74

Abstract:

An actuator for use in a fuel system. The actuator has a first metallic section adapted to be coupled to a motor, a second metallic section adapted to be coupled to a valve, and a nonmetallic section coupled to the first and second metallic sections for transmitting torque from the first metallic section to the second metallic section.

US Patent:

57175160, Feb 10, 1998

Filed:

Apr 4, 1997

Appl. No.:

8/825835

Inventors:

Marvin B. Klein - Pacific Palisades CA
David M. Pepper - Malibu CA
Ronald R. Stephens - Westlake Village CA
Thomas R. O'Meara - Malibu CA
David Welch - Menlo Park CA
Robert J. Lang - Pleasanton CA
Jack L. Feinberg - Manhattan Beach CA
Stuart MacCormack - Venice CA

Assignee:

Hughes Electronics - Los Angeles CA
SDL, Inc. - San Jose CA

International Classification:

H01S 300
G02B 626

US Classification:

359334

Abstract:

An optical amplification system directs a diffraction-limited signal beam through a series of approximately 90. degree. crossings with a number of non-diffraction-limited pump beams in a photorefractive medium. All of the beams are s-polarized, resulting in an energy transfer from the pumps to the signal beam while leaving the signal beam diffraction-limited. The photorefractive medium is preferably a series of BaTiO. sub. 3 :Rh crystals that receive the pump and signal beams through orthogonal faces, with their C-axes at approximately 45. degree. to both beams. A binary tree optical distribution network is used to minimize waveguide splits in forming a large number of pump beams. The outputs of several amplification modules are combined into a single output beam using adaptive optics, with the outputs from the different modules phase matched to each other by diverting two minor portions of the combined beam, partially overlapping the diverted beams and adjusting the amplification module phases to cancel phase differentials between the overlapped portions. Similarly, sets of combined and phase-matched beams can be combined with each other (again using adaptive optics) to generate still higher powers using a super module approach.