My patio door's lock is stuck!

by Sherri
(Mpls, MN)

I believe I have some type of mortise lock mechanism.

When rotating the knob to unlock the door, it did not completely move the latch(es)so I am unable to slide the door open. The knob no longer moves the mechanism to unlock or lock the door. I used an allen wrench to try to tighten the knob but that didn't work.

I can't get the door open enough to even determine what lock type I have.

I was able to open the door slightly,about 1/2" near the handle but no space is open at the top of the door. It appears that the lock has several latches. It looks like some have disengaged and some have not.

Any suggestions?

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