Gregory L Calhoun

US Patent:

42225400, Sep 16, 1980

Filed:

Dec 1, 1978

Appl. No.:

5/965557

Inventors:

William E. King - McCandless Township, Allegheny County PA
Gregory L. Calhoun - Lutz FL

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

A47B 9606
F16M 1102

US Classification:

248205R

Abstract:

Apparatus which can be remotely mounted in a tube in a tube sheet provides a platform for mounting a camera. The platform rotates about a shaft extending from the tube, tilts, and moves axially along the shaft to allow the camera to pan the entire tube sheet and equipment utilized to work thereon.

US Patent:

43121241, Jan 26, 1982

Filed:

Nov 27, 1979

Appl. No.:

6/097771

Inventors:

Gregory L. Calhoun - Lutz FL

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

B23P 1902

US Classification:

29726

Abstract:

A multiple tube pulling apparatus for pulling, at one time, a plurality of stub-tubes from the tubesheet of a steam generator. Each tube gripping apparatus of the plurality is expanded into gripping arrangement by an axially retracted tapered rod. As the internal diameter of each stub-tube can vary, the amount of axial movement of each tapered rod to provide proper gripping engagement also varies. The present invention provides a single hydraulic cylinder for axially moving the plurality of tapered rods and includes spring members connecting each tapered rod to the hydraulic cylinder to accommodate the variations in axial movement of each rod necessary to obtain the proper gripping engagement for each stub tube. Further, a spring biased guide block maintains the gripping tubes on proper centers corresponding to the stub-tube centers and once the stub-tubes are removed from the tubesheet, the guide block pushes the stub-tubes off the tube gripping apparatus freeing the apparatus for another operation.

US Patent:

42855039, Aug 25, 1981

Filed:

Jul 20, 1979

Appl. No.:

6/059857

Inventors:

Gregory L. Calhoun - Lutz FL
Angelo Cassette - Greensburg PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

B23K 710

US Classification:

266 71

Abstract:

A spacer and block cutting torch is lowered through the wrapper-to-shell annulus of a removed-top steam generator by addition of vertical sections of hollow-back column by vertical movement of a motorized carriage along a rack-and-guide track extending upwardly from atop the wrapper and manipulation of column clamps, one movable with the carriage and the other affixed to the wrapper, to transfer column weight from carriage to wrapper-top during adding and subtracting column sections. The rearward concave side of the column, held flush with the wrapper wall, readily accepts and serves to enclose operating gas hoses for the cutting torch. Yieldable bias means cooperates with the interior of the generator shell to urge the concave side of the column toward the wrapper.