| 摘要 |
An electrically heated soldering iron includes an electrical heating coil surrounding a heating element core. A metal soldering iron tip has screw threads formed on its rear end portion for releasably attaching the tip to the heating element core in heat transfer relationship. An elongated metal rod of a different metal than the tip has an end portion thereof received in a bore formed in the rear end portion of the tip. An electrical conductor is secured to the tip in spaced relationship to the rod. Both the rod and conductor extend axially rearward from the tip and make electrical contact with electrical connections within a hollow handle attached to the heating element core. The tip defines the only connection between the rod and the electrical conductor so that the tip itself forms a part of a thermocouple with the rod and electrical conductor.
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