| 摘要 |
<p>A thermal fuse which can be constructed easily and automatically and yet works accurately. It comprises an electric conductive cylindrical case (1) with a lead wire (L1) at the bottom thereof another lead wire (L2) in the case, a fuse alloy piece (2) of fusible alloy and ball contacts (5) under spring pressed condition between the fuse alloy piece and the lead wire in case, thereby forming an electric circuit between the two lead wires. When the fuse alloy piece fuses at the preset temperature, ball contacts (5) under spring pressed condition are released from pressing by the lead wire (L2) and the circuit is opened.</p> |
