My first thought was double pole double throw too. But it seems more like the flip flop style. At rest it is making contact with one set of poles. When the coil is activated it flips to connect the other poles. It doesn't look like the switch in the article. I thought cool I can later use it as a flip flop if I want, and right now at rest I'll just have nothing there. But when I hooked up the coil and plugged it in it buzzed. I'm wondering if I'm supposed to be usiing 220 to activate the coil. But then I can't use a digital timer to activate it which is half the reason I'm doing this. So I don't have to be concerned with power outages and my timers. Let me know what your buddy thinks. Thanks for troubleshooting this with me.