| 摘要 |
An electrical heater comprising a heating element, a sheath surrounding the heating element and spaced therefrom, the sheath having an end spaced from an end of the heating element, electrical insulation between the heating element and the sheath, an internal lead pin electrically connected to the heating element and extending toward the end of the sheath, an electrically insulating end plug within said sheath at the end thereof and an external lead having an inner terminal. The insulating end plug has an opening in its inner face into which the end of the pin is received, and a hole in its outer face having its centerline offset from the centerline of the pin but laterally bounded in part by a lateral surface of the pin, the hole in the end plug receiving the inner terminal of an external lead. The sheath holds the end plug in a laterally compressed state, whereby the end plug holds the inner terminal and internal lead in engagement with each other to form a lapped connection therebetween interiorly of the insulating end plug. Also disclosed is an oversleeve for the heater and an electrical heater assembly which is at an intermediate stage in the manufacture of a finished electrical heater.
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