Abstract: An explosive powder charge operated setting tool includes a housing containing an axially extending fastening element guide which is axially displaceable opposite to the driving direction when the front end of the setting tool is pressed against a structural component into which a fastening element is to be driven. When it is axially displaced, the fastening element guide displaces a piston guide which, in turn, means a device into a cocked position so that a firing pin in the device is ready to ignite the powder charge. The fastening element guide has an axially extending feed slot aligned with a magazine forming a part of the housing. Fastening elements are connected together in a belt-like fashion by guide bushes each positioned on a fastening element. The feed slot has a stepped width extending in the axial direction so that in axial displacement of the fastening elements only a single fastening element can be positioned to be driven from the fastening element guide.

Abstract: A bolt welding gun is provided with supporting legs extending outwardly from the gun housing which can be displaced to accommodate different bolt-attaching situations. The supporting legs can be mounted in a ring-shaped housing part which is rotatable about the driving axis of the gun. Alternatively, the ring-shaped housing part can be formed of individual segments with at least one segment arranged to be pivoted about an axis parallel to the driving axis. In another embodiment, the part of the housing to which the supporting legs are secured, can be provided with a plurality of receptacles greater in number than the supporting legs used so that the legs can be moved between the receptacles in accordance with the support arrangement desired.

Abstract: A welding gun for a capacitor discharge bolt welding device includes a thrust unit axially movably positionable within the housing. A collet chuck is fitted on the forward end of the thrust unit and holds individual bolts in position for the welding operation. A stop threadedly secured within the housing is adjustably positionable in the axial direction of the thrust unit relative to the housing for selectively adjusting the lead between the forward end of a bolt held in the collet chuck and the forward end of the supporting feet extending axially from the forward end of the housing.