Abstract: A connecting pin of a coil, which has an end section with an end section of a winding wire wound thereon with a plurality of turns, is initially provided with a drop of a fluxless soft solder and then arranged in the vicinity of the points of two opposite electrodes. An arc of a specific strength and duration is struck between the electrodes, so that the soft solder is fused and connects the winding wire to the connecting pin. The result is a fluxless soldering of the winding end in conjunction with low thermal loading of the coil former and of the connecting pin.

Abstract: In order to make contact from heavy-current connecting elements of a component, in particular a relay, to connecting conductors of an insulating mount (1), the blade terminals of the component, in the form of connecting tongues (10) are welded to bent connecting tabs (12) of the connecting conductors (13), which are embedded in a mount, for example a printed circuit board. In order to protect the plastic located in the vicinity against damage from the welding energy, the end sections of the connecting tabs (12) and of the connecting tongues (10) are provided with a tooth contour, such that the individual teeth (16, 17) are welded successively. Having a reduced area with which to conduct the current, the teeth reach a high thermal load. In consequence, the teeth rapidly reach the melted phase, without the adjacent plastic being caused to melt via the heat conduction in the short welding time.

Abstract: A method is provided for soldering a coil winding to a terminal pin. A specific quantity of solder is applied onto the terminal pin, the terminal pin having a winding end wrapped therearound. The solder, for example, can be applied by immersing the pin end into a solder bath having a temperature only slightly above the melting point of the solder. Subsequently, the solder is melted with a welding torch under a protective atmosphere only at a power and time required to achieve a soft-soldering temperature. As a result thereof, a soldering free of fluxing agent and without the high thermal stress of a welding is possible. Other embodiments include placing a ring of solder onto the terminal prior to heating. Also, a predetermined length of solder wire can be brought into contact with the terminal pin prior to heating. The invention provides a guide tube device for such a purpose.

Abstract: A method for connecting a wire, such as a wire from a coil, to a terminal, includes placing a metal cap with an at least partially closed end over the terminal on which the wire has been wound. The partially closed end rests on the free end of the terminal post. The metal cap is melted onto the wire and the terminal by welding its at least partially closed end in an inert gas. The metal cap may be crimped onto the terminal before welding. The metal cap is preferably of sheet metal that is formed into the cap shape be bending, and may include a conically shaped edge on it open end.

Abstract: A fine insulated wire with a diameter of less than 0.3 mm is attached to a connecting pin embedded in an electric component. The wire is wrapped around this connecting pin at least three times, and then argon-arc welded without melting the electrode. This welding operation is carried out from a distance of less than 3 mm and preferably on the order of 0.5 mm, for a short time such as for a period of less than 0.75 seconds, preferably on the order of 0.5 seconds. In order to avoid heating the wire is far above its melting point, which might destroy the wire or cause similar disadvantages, the connection pin is pre-tinned, the tin is rendered molten and the insulating coating of the wire is partially burned during the welding process in such a way that the solidified tin will hold the wire at several points.