W.c. Heraeus Gmbh

Wilhelm Zwergel

Fritz Aldinger

Franz Sperner

A heater plug comprising a heater coil connected to a terminal pin, said terminal pin maintained in gas-tight manner at least in part within and insulated from a plug shell, at least the surface of said heater coil formed by a metal or a base alloy of a metal of the platinum group said heater coil supported by heat electrically insulating rod-like or tubular supporting body heater coil surrounded by a protective tube. The heater plug is useful as a starting aid for diesel engines and other internal combustion engines, especially those without spark ignitions.

Heater plug for diesel engines

A heater plug comprising a heater coil connected to a terminal pin, said terminal pin maintained in gas-tight manner at least in part within and insulated from a plug shell, at least the surface of said heater coil formed by a metal or a base alloy of a metal of the platinum group said heater coil supported by heat resistant electrically insulating rod-like or tubular supporting body heater coil surrounded by a protective tube. The heater plug is useful as a starting aid for diesel engines and other internal combustion engines, especially those without spark ignitions.

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Freigericht, Germany

Wilhelm Zwergel