| 摘要 |
Electrical devices, such as rectilinearly adjustable potentiometers, are provided in which a hollow housing has a wall portion formed of thermoplastic polymeric material such as nylon and having an opening to accommodate a rotary adjusting member, typically a metal lead screw, the lead screw having a transverse retaining rib completely embedded in the polymeric material of the wall portion. Though the wall of the opening embraces the adjusting member, and the retaining rib is completely embedded, the adjusting member is rotatable relative to the housing. A method based on ultrasonic insertion is disclosed for making the devices.
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