I'm restoring (to working-condition) a Sargent "Zenith" 22C jointer, and am stymied at trying to remove the frog. It's a "Shaw patent" frog, shown here:
Shaw_patent_frog.jpg
You can see one of the interior frog-locking screws hiding down there, well protected by the frog's blade bed. How the heck can I bring any torque to those slotted-head screws? Patrick Leach mentions needing a "right-angle screwdriver" to get at them, but I have one of those, and I guess it's the wrong shape, because I can't bring it to bear on the screw heads, especially not with enough torque to budge them from their lightly-rusted lethargy.
I'd greatly appreciate any suggestions for a way to accomplish this.
Phil