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I was trying to hunt this 3-way business down last night.

All I could find is that way back when, these switches were called "Three Point Switches".

Search google books for "Three Point Switches" including quotes and you will find these in old electrical books. These are hard to link to, otherwise I would provide a link.

Then these very old switches were mounted on wooden boards. And had a hand lever you could move between the two contacts. So you could clearly see the "three points" on such a switch (lever and two contacts).

Then I read on a forum that the word "point" was at some time changed to "way". I couldn't find anything on that????
 

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Isn't research fun??? So many dead and loose ends................:laughing:

Somewhere between your research and what I said is the truth. I had done my research sometime ago but doubt I will be able to find it again.

Les
 
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