| 摘要 |
<p>An electric arc cutting apparatus comprises a carriage having wheels, one of which is guided in a rail so that the carriage can travel along a given path with respect to a workpiece. The wheel in the rail is adjustable on the carriage in a direction perpendicular to the rail. A frame is fixed on the carriage and carries a slidable holder for an electrode. A trigger is connected to the holder via a wire passing on pulleys, and by displacing the trigger, the holder and electrode secured thereto are conjointly displaced. One of the pulleys is spring-loaded to return the holder and electrode to an initial inoperative position when the trigger is released.</p> |
