Back in the late 60's I watched a show or movie on TV. A guy had a little box on his belt that produced a force-field. I remember him demonstrating it by forcing another guy against a wall. For the guy with the force field it was effortless to pin and or crush the other guy if he wanted.
I don't remember if it was a TV serial or a movie. I've watched all of the old Twilight Zones, Outer Limits, and countless 1950's sci-fi flicks with no luck finding it yet.