Edward J Schaefer

US Patent:

43635458, Dec 14, 1982

Filed:

Mar 26, 1981

Appl. No.:

6/247766

Inventors:

Edward F. Schaefer - Tulsa OK
Lawrence R. Lozynski - McHenry IL
Donald E. Lorenzi - Des Plaines IL

Assignee:

Magnaflux Corporation - Chicago IL

International Classification:

G03B 3700
G01N 2904

US Classification:

354 63

Abstract:

This invention relates to apparatus for photographic inspection of the interior of a pipeline and more particularly to apparatus which includes an optical port wiper which makes it possible to obtain clear and accurate photographs under adverse environmental conditions. The apparatus is highly effective and reliable while being comparatively simple and readily and economically manufacturable.

US Patent:

44344279, Feb 28, 1984

Filed:

Jan 5, 1982

Appl. No.:

6/337117

Inventors:

Frederick Clarke - Houston TX
Donald E. Lorenzi - Des Plaines IL
Edward F. Schaefer - Tulsa OK

Assignee:

Magnaflux Corporation - Chicago IL

International Classification:

G03B 3700
G01D 938

US Classification:

346 33P

Abstract:

A device is disclosed which includes a camera pig and a tow pig having an articulated connection therebetween to permit movement through pipe bends. The tow pig includes a syphon device for projecting liquids upwardly and forwardly and also includes a compressor and a desiccant chamber for drying of gas which is injected into a camera space between cups of the camera pig. A flow path is provided through the camera pig which by-passes the camera space, for maintaining a passive environment therein.