Peter V Dembowski

US Patent:

43838545, May 17, 1983

Filed:

Dec 29, 1980

Appl. No.:

6/220277

Inventors:

Peter V. Dembowski - Richmond Heights OH
Peter W. Schilke - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

B22F 500
B22F 300

US Classification:

419 1

Abstract:

A method of creating a controlled interior surface configuration of passages within a substrate, particularly cooling passages of nozzles or buckets of a gas turbine, involves the hot isostatic pressing of a leachable passage insert whose surface carries the female image of the desired interior surface configuration inside the substrate followed by leaching of the insert from the substrate.

US Patent:

45174938, May 14, 1985

Filed:

Jan 27, 1983

Appl. No.:

6/461348

Inventors:

Peter V. Dembowski - Richmond Heights OH
Quentin D. Dobras - Chesterland OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01J 744
H01J 1346
H01J 1978
H01J 2996

US Classification:

315 73

Abstract:

A rapid start fluorescent lamp comprising a pair of cathode mounts each having a pair of lead-in wires for cathode heating current, and a thermal switch to turn off the heating current after sufficient cathode heating for the lamp to operate. A third lead-in wire in each mount bypasses the thermal switch and is used for heating the cathodes to activate them during manufacturing.