Welding-devices for operating in exiguous spaces

Claim 1

A welding device for operating in exiguous spaces, particularly for butt-joint welding parts such as tubes, said device comprising: a support member; a rotor mounted on said support member for rotation about an axis; a rocking lever pivotally mounted on said rotor for rotation therewith; a welding electrode mounted on said rocking lever for rotation therewith; said rocking lever being pivotable such that said electrode is moved substantially radially with respect to said rotor between a welding position and a non-welding position; a connecting member having a first end wound about the periphery of said rotor and a second end; means, supported by said support member and fixed to said second end of said connecting member, for causing said connecting member to move in a direction to be unwound from said rotor, and for thereby causing said rotor and said electrode to rotate about said axis; a control cable extending through said connecting member, throughout the entire length thereof, said control cable having a first end connected to said rocking lever and a second end; and lever control means connected to said second end of said control cable for selectively operating said cable and thereby pivoting said rocking lever and moving said electrode between said welding and non-welding positions thereof.