Method for producing an electrical connection between a heating conductor provided with a sheath, and a sheathed PTC thermistor

摘要

A mineral-insulated heating conductor (1), which is surrounded by a metal sheath (2), is electrically connected with the aid of an insulating body (4) to a PTC thermistor (5), which is likewise surrounded by a sheath (10). Once the ends of the conductor wires (1, 5) are freed of the insulating material (3), which is in the form of powder, they are inserted in opposite directions into a continuous hole (6) in the insulating body (4) and are soldered or welded to one another there. Subsequently, the sheath ends are also connected in a gas-tight manner by soldering or welding. In this case, a locally tightly bounded transition region from the heating conductor to the PTC thermistor is produced. As a result of the use of the insulating body (4), refilling of the insulating material (3), which is in the form of powder, at the connecting point is superfluous. <IMAGE>