Push button release switch

[PYZAA]

Hi,
Just wondering if someone could point me in the right direction. I'm wondering if there is a mechanical system that already exists that has a button pop up when a trigger is activated and when pressed will release pressure while locking in the down position to wait for the next trigger.

Thanks in advance.

 

[IRstuff]

GFCIs do pretty much that.

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[PYZAA]

Thanks for the help, I'm looking for a pure mechanical solution without electricity though. Any thoughts?

 

[1gibson]

I've seen some ball point pens that do that, trigger is underneath the clip so when you put it in your shirt pocket it retracts. Can't really expect a better answer without giving some idea of scale or application you're looking at.

 

[EdStainless]

Excess flow valves work that way. At some critical flow they pop up and block all flow, you push down the cap to resume flow.

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[BUGGAR]

You just described the firing mechanism of a revolver. Put a button on the hammer and you have it.