John N Horne

US Patent:

49227548, May 8, 1990

Filed:

Aug 15, 1989

Appl. No.:

7/395193

Inventors:

John G. Horne - Lafayette CA
David A. Dornfeld - Berkeley CA
Keith A. McMillen - Berkeley CA

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

G01N 2900

US Classification:

73587

Abstract:

An acoustic emission transducer has an improved design and mounting arrangements for using it to monitor machine tool operating condition. The transducer has a hollow housing with external threads capable of making a threaded mounting connection through which acoustic emission energy generated by operation of a machine tool propagates and is then transmitted by the housing. Also, a wear plate is attached to one end of the externally-threaded housing and supports a piezoelectric detecting element in the housing. The plate is capable of transmitting acoustic emission energy and the detecting element is capable of detecting it and generating an electrical signal in response thereto. In a surface mounting arrangement of the transducer, an adapter is used in mounting the transducer to a surface of the machine tool support structure. In an integral mounting arrangement of the transducer, the housing of the transducer is threaded directly into an internally threaded cavity in the machine tool support structure. In both mounting arrangements, a contact ball is disposed in a recess formed in the machine tool support structure below the transducer plate for providing acoustic emission energy transmitting contact between the transducer plate and the machine tool support structure.

US Patent:

48283843, May 9, 1989

Filed:

Dec 3, 1987

Appl. No.:

7/128548

Inventors:

Daniel J. Plankenhorn - Palo Alto CA
Victor G. Gregson - Cupertino CA
John G. Horne - Lafayette CA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01J 100

US Classification:

356121

Abstract:

A scanning system which obtains and displays the spatial energy distribution of a high power laser beam. The beam to be examined is directed toward two knife-edge mirrors arranged to pass only a thin vertical segment of the beam and to reflect the remainder of the beam to power absorbers. The mirrors are scanned across the beam, and a scanning disk having helical slots therein samples the vertical segment, and these samples are directed by means of a paraboloid mirror toward a detector responsive to the wavelength of the laser beam. The output of the detector is placed into storage and thereafter displayed on a high resolution color monitor with different colors representing different energy levels or as a simulated three dimensional display so that an operator may obtain an indication of the spatial energy distribution of the laser beam under examination.