Originally Posted by
mike holden
The connection between the angled brace constitutes one leg and two vertices of a triangle, the movable jaw and the point where the threaded rod comes through is the second leg, the connection at the top of the angled brace and the point where the threaded rod comes through is the third leg. If the third leg becomes shorter, the leg must rise as the angled brace length cannot change. Simple geometry.
It's a simple triangle. One leg of that triangle is the screw, which passes through a nut. The entire triangle moves in and out as the screw is turned. That connection at the point where the angled leg meets the screw moves. Nothing goes up and down. Even simpler geometry.
"I've cut the dang thing three times and it's STILL too darn short"
Name withheld to protect the guilty
Stew Hagerty