David S Lambert

US Patent:

8470458, Jun 25, 2013

Filed:

Dec 9, 2010

Appl. No.:

12/963937

Inventors:

Joshua Persky - Boulder CO, US
David A Litton - West Hartford CT, US
David A Lambert - Clinton CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F03B 3/12
B32B 15/04
B32B 3/10

US Classification:

428698, 428701, 428702, 428209, 428472, 428446, 416241 R, 416241 B

Abstract:

A workpiece, such as a turbine engine component, comprises a substrate, a thermal barrier coating on the substrate, and a hard erosion barrier deposited over the thermal barrier coating. The erosion barrier preferably has a Vickers hardness in the range of from 1300 to 2750 kg/mm. The erosion barrier may be formed from aluminum oxide, silicon carbide, silicon nitride, or molybdenum disilicide. The erosion barrier may be formed using either an electrophoretic deposition process or a slurry process.

US Patent:

8512871, Aug 20, 2013

Filed:

May 30, 2006

Appl. No.:

11/443796

Inventors:

Joshua Persky - Boulder CO, US
David A. Litton - Rocky Hill CT, US
David L. Lambert - Clinton CT, US

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F03B 3/12
B32B 15/04
B32B 3/10

US Classification:

428472, 428209, 428446, 428698, 428701, 428702, 416241 R, 416241 B, 60722

Abstract:

A workpiece, such as a turbine engine component, comprises a substrate, a thermal barrier coating on the substrate, and a hard erosion barrier deposited over the thermal barrier coating. The erosion barrier preferably has a Vickers hardness in the range of from 1300 to 2750 kg/mm. The erosion barrier may be formed from aluminum oxide, silicon carbide, silicon nitride, or molybdenum disilicide. The erosion barrier may be formed using either an electrophoretic deposition process or a slurry process.

US Patent:

20030152814, Aug 14, 2003

Filed:

Feb 11, 2002

Appl. No.:

10/073813

Inventors:

Dinesh Gupta - S. Windsor CT, US
David Lambert - Clinton CT, US
Mladen Trubelja - Manchester CT, US
Michael Maloney - Marlborough CT, US
Nicholas Ulion - Manchester CT, US
David Litton - Rocky Hill CT, US

International Classification:

B32B015/04

US Classification:

428/702000, 428/621000, 428/629000, 428/699000

Abstract:

A superalloy article is disclosed having a thermal barrier coating. The article comprises a superalloy substrate, an adherent alumina layer on the substrate, and a ceramic, thermally insulating layer on the alumina layer. The ceramic layer has an overall thickness and comprises a relatively strain tolerant, columnar grain ceramic on the alumina layer and relatively more thermally insulating ceramic on the columnar grain ceramic. The alumina layer may be formed using an alumina forming layer such as an overlay or aluminide bond coat, or the superalloy may comprise a material that is capable of forming an alumina layer. The ceramic layers may be formed of a stabilized zirconia or other suitable material, and may have the same or different compositions.

US Patent:

44609930, Jul 17, 1984

Filed:

Jan 12, 1981

Appl. No.:

6/224339

Inventors:

Dean A. Hampton - Watertown CT
David A. Lambert - New Fairfield CT

Assignee:

General DataComm Industries Inc. - Danbury CT

International Classification:

H04J 316

US Classification:

370 84

Abstract:

A method and apparatus are described for automatically generating the frame that is used in a bit-interleaved time division multiplexer (TDM). The apparatus comprises a microprocessor, two random access memories in which are stored the channel select signals, device for determining the transmission frequencies of each channel and a computer program which is stored in the memory of the computer for calculating the distribution of the channel select signals in the frame. With such a system, the frame can be reconfigured in about thirty seconds. Two random access memories are preferably used for the storage of the channel select signals. While the signals stored in one memory are being used to generate the actual frame, a new set of channel select signals can be stored in the other memory. After such an updated frame is written in the second memory, the task of generating the channel select signals can be switched from the first memory to the second memory without loss of any data from any of the data channels.