I'm building a gate for the top of the stairs since our 10-month-old is a perpetual flight risk from his room at the end of the short hallway. I'm trying to figure out if I can install three latch catches such that the gate can be in any one of three positions.
As I hope these pictures show, the gate could theoretically be closed (0 degrees), completely open (when baby is asleep or downstairs -- 180 degrees) or it could partition the hallway so that we can get up and down but he can't since his room is on the other side (~100 degrees). The second photo is the same arrangement but taken from the doorway on the bottom left of the first photo.
My main question is whether there's a type of latch that makes sense here. A standard outdoor gate latch both wouldn't fit and would mean the latch would stick out of the wall in a way that we'd probably bump into a lot. I'm hoping there's something less obtrusive. The catch here -- pun unintended, until now! -- is that the middle latch at about 100 degrees has to be easy to either engage or bypass if we want to open the gate all the way (180 degrees).
Second, is there an ideal hinge here? In order for the gate to reach both the wall at 100 degrees and the door frame at 0 degrees, it has to be set about two inches to the left of the edge of the bannister (green line in second image). This has the benefit of meaning the gate won't physically be able to swing into the stairwell, such that the latch at 0 degrees doesn't need to do all the work keeping Baby upstairs. I'm picturing a vertical bar that protrudes from the bannister and attaches to knuckles fixed to the gate.
Finally, I'd note only that the latch at 100 degrees doesn't have to be able to withstand tremendous impact since, if Baby manages to push it open, it will just swing to the 0 degrees position. He'll be able to invade the bathroom but not get to the stairs.
Thank you!