| 摘要 |
A lampholder for a screw-cap electric lamp comprises a socket and supported within the socket a ring of resilient wire which forms the screw thread of the lampholder and which also acts as a first centering means for the lamp. The lampholder is provided with a side contact which includes a number of contact portions spaced circumferentially of the interior of the socket to establish electrical contact with the circumference of the threaded plug of the lamp and also to act as a second centering means for the latter.
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