After consideration about patenting this little idea, I have decided I don't have the time, finances or inclination to jump through all the hoops, esp as the rules these days are "first to file" rather than first to invent.
Rather than get pissed at someone filing before I do, and in the interests of good karma, I hereby release this basic idea of the force sensitive pressure sensor controlled current control for a TIG torch as PUBLIC DOMAIN. Knock yourselves out.
If you dig it paypal me a few bucks, and if you make them commercially, perhaps giving credit/a few bucks and a sample would be good for your karma.
If "you" happen to be "Miller" a Dynasty 350 tigrunner and trolley would be a nice thank you ;-)
I'll be posting up some patterns/designs as I get to it, latest version will be a couple SMD caps, couple SMD resistors and sealed up in a flat rubber sandwich sealed at the edges for dust/water/damage resistance.
I may make a few up to sell if I can come up with a robust, easily manufacturable design.