John F Lawler

US Patent:

20130219909, Aug 29, 2013

Filed:

Feb 27, 2012

Appl. No.:

13/405729

Inventors:

Vijay Anand Raghavendran Nenmeni - Atlanta GA, US
John Fitzgerald Lawler - Dallas GA, US
Jonathon Michael Hadley - Delhi NY, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

F02C 3/30

US Classification:

60775, 60 3948

Abstract:

A fuel purging system for a turbine assembly includes a fuel delivery system. The fuel delivery system includes a fuel source for providing a fuel to the turbine assembly, a control valve for regulating a fuel flow of the fuel, a flow divider for selectively distributing the fuel to at least one combustor, and a combustor valve located upstream of the at least one combustor. The fuel purging system also includes a steam source for distributing a steam to the fuel delivery system at a location upstream of the combustor valve.

US Patent:

39327965, Jan 13, 1976

Filed:

Jan 31, 1973

Appl. No.:

5/328285

Inventors:

Marvin L. Kreithen - Huntingdon Valley PA
John J. Lawler - Newportville PA

Assignee:

Textron, Inc. - Providence RI

International Classification:

G05B 1940

US Classification:

318685

Abstract:

A multi-axis machine tool or the like employing controls for an open loop stepping motor system of two or more axes in which variable frequency feedrate clock pulses are generated to ultimately control the speed of the various stepping motors. The frequency of the feedrate clock pulses is modified in accordance with programmed information; additional information defines the tool path which can either be straight line or circular arc segments and characteristically the feedrate clock pulse generation means increases pulse frequency at the beginning of a segment in such manner as to increase motor speed in accordance with system inertial limitations from a speed below to a speed above the slewing rate of the stepping motors. Thereafter upon sensing a predetermined distance from the end of the segment, pulse frequency is reduced to reduce the stepping motor speed below the slewing rate. Override means is provided to permit an operator to selectively increase or decrease pre-programmed rate to compensate for variable machining factors such as differences in materials, and dullness of tool.

US Patent:

20150354454, Dec 10, 2015

Filed:

Jun 5, 2014

Appl. No.:

14/296846

Inventors:

- Schenectady NY, US
John Fitzgerald Lawler - Dallas GA, US

International Classification:

F02C 7/057

Abstract:

Various embodiments include apparatuses and systems for controlling compressor clearances. In one case, an apparatus includes: a material layer sized to fit a case of a gas turbine (GT) compressor in a GT system, the material layer including a heating element for applying heat to the case of the GT compressor; and a control system coupled with the material layer, the control system configured to: determine whether a shutdown sequence is occurring in the GT system; and actuate the heating element to apply heat to the case of the GT compressor in response to determining that the shutdown sequence is occurring.