How do I wire volcano buttons?

[crashwg]

I got my set of volcano buttons for the Warlords machine that I plan to build sometime in the future and I want to wire them up...  You know, check em out thoroughly and all. 

Now how exactly do I wire them?

There are 6 contacts on the buttons.  Two labeled NC (normally closed [duh]) two labeled NO (normally open[duh again]).  The other two are not labeled and I'm pretty sure they are to light the button. 

As for connecting the pushbutton functionality, would I connect one wire to each of the NO points and pushing the button would then connect them to eachother?  This is the first button I've seen that doesn't have a common point for NO and NC functions...

As for the light though...  Are they LEDs?  If they are it won't hurt to apply the voltage backward right?  What if they're not?  Are there any types of lightbulbs that are effected by reverse current?

Anyways, here's the picture for those who may know which way the power goes...

[SirPoonga]

one of my extras is that weird brand.  For others reading this, that is not the cherry volcanos.

I multimetered mine.  Seems like a SPDT switch then.
However, continuity shows the two NC are a closed circuit when button not pressed, and not a closed circuit when it is pressed.  I am confused on that.  But I might be wrong, hard to test it with only amultimeter and trying to hold everything in place
Looking at mine in the same orientation as yours, the right side is labelled + for those two pins.


http://img.photobucket.com/albums/v472/SirPoonga/asteroids/starts.jpg

[RayB]

However, continuity shows the two NC are a closed circuit when button not pressed, and not a closed circuit when it is pressed.

[SirPoonga]

becuse they are NC.  Read what I wrote again.  When the button isn't pressed there is a closed connection between the two NC contacts.  First, that;s odd that they are the "same"?  But  when you press the button they become open so they aren't.  That's jsut weird and I wonder why anyone would ever need that behavior in a switch, especially on an arcade machine.

[JCL]

I guess I don't understand the confusion either. NC is normally closed. When the button is not pressed, they are shorted. That seems to be the behavior you are describing.

An arcade machine may not need this in most cases, but much of the arcade stuff is off the shelf things that happen to work well enough for this application. Custom stuff is stupidly expensive.

[RayB]

I think I understand now. You're confused that there are TWO nc contacts as opposed to one NC and one ground?

[SirPoonga]

I guess I don't understand the confusion either. NC is normally closed. When the button is not pressed, they are shorted. That seems to be the behavior you are describing.

Exactly. 

Actually, I didn't try my continuity test on all combination of the pins.  Does it work like this?
The two NC are normally closed with each other, the two NO are open with each other.  When you press the button the NO becomes closed and the NC becomes open?i have to test again, maybe I accidently touched one of the other contacts, but when I had a lead on a NO and NC contact that were next to each other when I pressed the button they became closed which is what is causing my confusion.