This is about a set of Velux doors made in 1978 on my Father in laws house in Germany. The door is a triple pain that you can open regularly as a door or as a security means will unhinge across the top and pull inwards along the top a foot or so. It's hard to describe but surely someone knows exactly what I have here. Anyways these monsters are pure precision only, made for those heavy block houses a foot thick where nothing moves much for 100 or more years. Adjustment is zero zilch on all the hinges and they are precision set into the jamb.
Over the years the one used most has developed what I guess is a subtle bowing in the middle right where the latch engages. This is just a snap in latch which holds the door closed with a clamping action. Full latching is done by 2 other spaced latches that are angled and suck the door tight. Those work fine, it's the small clasp latch that doesn't quite catch anymore. Of course it is a neat little self centering thing full of German precision but it allows absolutely no movement laterally whatsoever. In fact it sits down in the little track in the wood custom fitted with its outer edges protruding over the edges of the wood that forms the flange. That's the gist of it and I hope the pictures show what I mean.
I see no way to adjust that latching mechanism in any way without cutting away some of that wooden track and moving the latch sideways a tad. Of course it's not enough to relocate another hole completely but rather right along side the other holes about an eighth of an inch. So is that what needs doing or is there some other mystical fix that I can't see? Here is a link to the photobucket album with the somewhat poor pictures if it works.