Abstract: A device for fastening by soldering an element having a plurality of laterally projecting, substantially coplanar connecting wires to a print plate comprising a bracket holder capable of performing a movement in a direction substantially perpendicular to the surface of the print plate and comprising a bracket heated, for example, by electric current, to the desired soldering temperature and practically simultaneously soldering all connections at the correct places of the print substrate during the movement of the bracket holder; wherein the bracket holder comprises a part carrying the soldering bracket and a part connected with a mechanism for producing the movement of the bracket holder, the parts bearing one on the other by concentric spherical surfaces and being held in contact with one another solely by spring force.

Abstract: A pneumatically operating device comprising a cylinder in which a piston can reciprocate by varying the pressure on at least one side of the piston, which piston is connected on the working side with a projecting pin passed (in gastight manner) through the working end of the cylinder, while on the side opposite the working side the piston is connected with a projecting pin passed (in gastight manner) through an end of the cylinder opposite the working end, the projecting end extending by a given length through a hole of a setting ring and having, on the side of this ring remote from the cylinder, a stop exceeding the dimensions of the hole in said setting ring, the setting ring being displaceable in the direction of length of the cylinder.

Abstract: A welding head for resistance welding, in particular for spot welding, comprising a frame to which a first welding electrode is fastened in a fixed position and a carrier for a second electrode lying substantially opposite the first electrode, said carrier being movable with respect to the frame in a manner such that the second electrode can be displaced in the direction to the first electrode, the second electrode being fastened to an element which is displaceably connected with the carrier in a manner such that it can perform a movement in a direction substantially parallel to the direction of movement of the carrier.

Abstract: An arc welding device for welding tie elements to a work piece includes a welding head for positioning one tie with respect to the welding spot on the work piece and exerting pressure between the tie and the work piece. A control member determines the amount of energy to be dispensed by the energy source to the welding head. A memory stores data indicating the relation between amount of energy dispensed and various welding parameters. A measuring member supplies values for some of the parameters. A measuring member compares the amount of energy actually dispensed with the energy determined by the memory member and readjusts the setting for the energy source as a result of this comparison.