| 摘要 |
Improvements to 3-way light bulbs and to their electrical sockets are shown. The major improvement is to replace the rigid middle contact element of the socket by an elastic contact spring. Other improvements are described, which can be applied to the bulbs as well. These include flattening and smoothing the solder joint that is located on the bulb middle contact ring. Also, some new add-ons inserts or adapters are described, which can be used together with the bulbs and sockets, to improve the performance of such bulbs.
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