MOVABLE PROJECTOR UNIT FOR GAMMA RADIATION FOR WELDING CONTROL PURPOSES WITH PIPE-LINES AND THE LIKE

A movable projector unit for welding control purposes with pipe-lines and the like, comprising a motor driven carriage, a carriage mounted projector for gamma radiation provided with a protective housing having an axially extending channel therein for the movement of a holder for a radio-active source, and a micro-pneumatic device to move said source holder from the shielded rest position in the housing to an exposure position and back, and a remotely controllable, electronic unit to control the motor of the carriage and the micro-pneumatic device of the projector.