Abstract: The present invention relates to aspects of securing holding jaws in nail machines, including a method, a machine, a tool ring and a holding jaw for such purposes. The novel aspects of the invention include that holding jaws are secured to a tool ring in a manner where a number of immovably secured passive fittings are used as well as a number of active fittings. It is hereby ensured that holding jaws may be e.g. replaced without loosening many other holding jaws, and that the holding jaws may be placed very precisely and in a manner, which is repeatable. It is also ensured that the holding jaws may be effectively and easily secured.

Abstract: The invention is directed to a device for the generation of pressure pulses, being intended for transmitting signals, in a fluid-carrying channel (2), using a pulser (1) designed to be integrated in the channel (2) and having a housing (4) and an adjustable throttling device by means of which the flow resistance can be varied at at least one point of the channel (2), an electrical generator (16), an impeller (9) exposed to the fluid passing through the channel and designed to drive the generator (16), a control device by means of which the load of the generator (16) can be varied in response to control signals, and an actuating device that is connected to the throttling element (12) and effects an adjustment of the throttling element responsively to the driving torque of the generator (16).

Abstract: A tool holder having a plurality of tools fixed thereon is used in a production machine such as a production press to position one tool after the other opposite a workpiece holder. All of the tools perform the same operation and can be brought into position by a pneumatic cylinder which can angularly displace a pinion engaging a rack.

Abstract: In a method of making screws, rivets or similar objects from a metal wire (6) the wire (6) is moved through a stationary cropping bushing (14) forwardly to a movable cropping bushing (24) present in a receiving position, following which the movable cropping bushing (24) is moved away from the receiving position substantially transversely to the axial direction of the wire to release a blank from the wire (6). The movable cropping bushing (24, 25) is then moved together with the released blank (26) further on to a discharge position, in which a punch (27) is adapted to move the blank (26) partly into a die (16) and to compress the blank (26) sufficiently to pre-upset it by cold flowing in the region between the die (16) and the movable cropping bushing (25).