I'm having a heck of a time with this.
I'm trying to find a mechanical remote switch / timer for an older camera. The camera takes the kind of cable that screws directly into the shutter release - it's usually a push button or bulb type release. Hard to describe.
Anyway... I need a timed remote... one that I can specify the length of exposure - not a self timer, which would trip after a set amount of time.
Searching B&H and various other places hasn't turned up much, other than a few homemade varieties of the what I need.
Any ideas on where I could find something like this?
It's actually a screw-type release for a medium format pentax. The release type is pretty common I believe, it's just a mechanical release, either triggered with a button type mechanism or an air bulb. I had the same mount on an old manual canon, and on a cheap pentax 35mm I had a long, long time ago. It just screws right into the top of the button.
At this point, it looks like what I'm looking for doesn't exist, though I've pretty much figured out a way to build one in a similar way to what you suggested.