Abstract: A metal tube wall disintegrator is convertible in being able to disintegrate an arcuate or annular portion on the inner wall of the metal tube or to disintegrate merely one longitudinally extending portion on the inner wall of the tube. In the arcuate disintegrating mode, the disintegrator uses an electrode which is rotated at the end of a flexible cable inside the tube at a selected longitudinal position to be able to disintegrate or cut partially or completely through the tube wall. A first drive means rotates the flexible cable and electrode, and a second drive means rotates an outer tubular sheath of the flexible cable. This tubular sheath rotates a guide tip at the forward end of the outer sheath and the guide tip has a radially elongated, eccentric slot through which the electrode shaft extends. This permits a slow rotation of the eccentric slot so that the electrode disintegrator arc moves in an arcuate path around the inner tube wall.

Abstract: A portable disintegrator to disintegrate a hole in a metal workpiece is disclosed. Disintegrator current and coolant are supplied to the working end of an electrode which is vibrated in advance and retract axial movements. Guide means either actually engages the workpiece immediately surrounding the hole to be formed or engages a part of the workpiece closely adjacent where the hole is to be formed in the workpiece. The main frame of the metal disintegrator may be counterbalanced for weight but is guided by hand with freedom of limited movement in two dimensions during operation of the disintegrator.

Abstract: An adjustment device for mounting a metal disintegrator head to a support is described comprising a first and a second housing with the first housing being mounted to the support and the second housing being mounted to the disintegrator head. One of the first and second housings has a mounting member and a plate member. Means are provided for relatively journaling the mounting member and the plate member about a first axis. A hinge interconnects the first and second housings enabling movement between the first and second housings about a hinge axis which is substantially perpendicular to the first axis. Locking means is provided for locking the position of the first housing relative to the second housing about the hinge axis. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: An angle adjustment unit for mounting a disintegrator head to a support is disclosed comprising a first housing adapted for mounting to the support and a second housing adapted for receiving the disintegrator head. A nut including a nut body and an expanded portion is mounted to the second housing with the nut body journaling a housing aperture in the second housing and with the expanded portion engaging the second housing. A threaded member having external threads extends from the first housing. The nut is mounted on the threaded member for producing a frictional engagement between the first and second housings upon rotation of the nut in one direction to prevent relative rotation therebetween and for removing the frictional engagement between the first and second housings upon rotation of the nut in the opposite direction to enable relative rotation between the housings.