Crc-evans Pipeline International, Inc.

Crutcher Resources Corporation

Floyd M Thompson, Jr

A capstan drive assembly for electric arc welding receives filler wire which can have an undetermined cast to the wire. The assembly provides for self feeding of the wire from the inlet completely through to a welding torch. No portion of the assembly must be opened or disassembled to feed the filler wire. The wire is captured in a groove on the periphery of a capstan and held in place by spaced apart pressure rollers which serve to impart a predetermined cast to the filler wire. The predetermined cast overcomes any previous cast which was present in the wire. After the wire has received this cast, it is directed between opposite sides of wire straightening rollers which serve to bend the wire in the opposite direction of the predetermined cast and apply sufficient force to counteract the set cast. This apparatus and procedure results in producing a filler wire which is substantially straight.

Capstan drive assembly for filler wire in electric arc welding

This invention relates to automatic welding of confronting edges of two bodies between which is a groove to be filled with a material and, more particularly, to conditioning, processing and use of control signals representative of an integration of the absolute product of the differences between the arc voltage at the sidewall and the centerline arc voltage and the arc current at the sidewall and the centerline current for an integration window near the sidewall for automatic reversal of the traversing welding torch. 3

Welding control by power integration

A unit (10) is employed such that sections of piling are separated and removed from the surrounding leg jackets to facilitate relocation of an offshore drilling platform. Unit (10) comprises a clamping section (20) by which the unit is secured in place and then utilized to lift a separated section of piling after operation of a cutting section (22). The cutting section (22) includes a rotatable plate (56), at least one cutting disk (68) mounted for movement on the plate, a cylinder (76) for actuating each cutting disk inwardly and outwardly, and a motor (62) for driving the plate.

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Spring, TX, United States of America

Floyd M Thompson, Jr