Double Cylinder Lock

[tonsofquestions]

I asked this the other day in a different post, but I thought I'd ask it again, separately, in case anyone didn't want to answer my post due to it's length.
I was wondering if anyone knows how a double cylinder lock works. I understand how a normal deadbolt works, but the double cylinder eludes me (I don't want to go buy one just to take it apart). The key isn't symmetrical, so it obviously isn't moving the same pins, regardless of the side the key is inserted. (Also makes sense, since it's called a "double cylinder"). But if it's only setting some pins, how does the deadbolt still turn when the other cylinder's pins aren't set? I'm probably just missing something simple, but I can't figure out what it is.
Thanks.

[Varjeal]

Someof your terminology is a bit off, but in essence, here's your answer.

A double cylinder lock is essentially two seperate locks that operate the same bolt. Generally, the same key will operate both sides. The part that actually operates the bolt is essentially a lazy cam, which means that when assembled properly, turning the key on either side turns both tail pieces since they fit into the same place on the bolt.

Hope that helps.