Abstract: A receptacle for a feed mechanism comprises a receiving body having a receiving chamber connected to a feed duct and a conveying duct extending substantially perpendicularly to the feed duct. At least one blocking means is arranged in the aperture region of the feed duct and reduces a cross section of the feed duct. The blocking means clears the cross section of the feed duct in the direction of the receiving chamber and blocks it in the opposite direction.

Abstract: A stud holder for a stud-welding device with a through-duct has an outlet orifice and a first holder with resilient holding fingers which extend in the longitudinal direction of the through-duct and each have, in the region of the outlet orifice, holding portions distributed round a periphery of the through-duct. The device further comprises at least one second holder with resilient holding fingers which extend in the longitudinal direction of the through-duct over a proportion of its length, each holding finger having, at one end region, a holding portion which rests on a circumference of the through-duct, the holding portions of the holding fingers of the second holder and optionally of each further holder ending before the holding portions of the holding fingers of the first holder.

Abstract: Stud feeder with an adapter (1), in which a conveying duct (4) and a stud feed orifice (3) designed substantially perpendicularly to the conveying duct (4) are provided, with a cylindrical or slightly conical stud holder (2) arranged coaxially to the conveying duct (4) and with a loading pin (10) which is capable of moving to and fro in the conveying duct (4) and which displaces studs (9) from the stud feed orifice (3) to the stud holder (2), characterized in that the conveying duct (4) is formed by a tubular gripper (5) which is slotted at least over a proportion of its length, and the gripper segments (6) are resilient substantially perpendicularly to their length.

Abstract: Process for welding a weld-in part in a weld point comprising a metal plate and a metal covering lying thereon with two tools of which one is formed by a welding head and the other by a drill for preparing the weld point by a drilling process. The drill attached to a revolving device initially in one operating position, by means of a lifting motor which can be moved in a controlled manner between a return position and a machining end-position and vice versa, performs the process at least until the metal plate is drilled (machining end-position) in preparation of the weld point. By pivoting of the revolving device, a welding head arranged on the revolving device and equipped with the weld-in part is then brought into an operating position above the prepared weld point to perform welding, meanwhile the drill is coupled to the lifting motor when the welding head is coupled to the lifting motor when the drill is uncoupled to perform welding on completion of the drilling process.

Abstract: A stud welding gun has a forepart which includes the delivery end of an automatic stud-feeder and is secured to the housing by a quick releasable joint so as to be readily replaceable by another forepart supplying a stud of different size. The gun includes a pneumatic piston and piston rod which serves to push a stud into the collet after delivery to the gun. The piston rod is detachable from the piston and means is provided for locking it in the forepart so that it is replaced into the forepart for studs of different size.