A non tested night latch can be used for access but it must be supported with a tested lock so you would have two locks on the door.
Remove mortise lock patio door.
The important thing with mortised locks and any sliding glass door lock really is getting the right description by taking dimensions or even better by taking a digital photograph to use in finding the right lock.
A mortise locks has a pocket called a mortise that is cut into the door itself.
Patio door locks mortise style.
They are usually held in with screws.
Removing a mortise lock.
Test operation of lock.
Check new lock in door to see if mortise needs to be deepened.
Reinstall trim using new spindle with brass sleeves.
These are the parts used.
Patio door locks come in a number of different types.
Removing a mortise lock requires no more tools than for removing a regular knob door lock.
The lock is encased in this pocket making it a more secure locking method.
Prime line products c 1225 sliding door handle mortise st.
Install new lock body in door.
Trim new lock to fit in door panel with shootbolt tip.
They are often used in higher end doors because steel mortise locks are more secure than the cast aluminum alloy versions used in many patio doors.
Grind rivets off new lock.
How to change an old mortise lock handle patio door with new 2019 parts.
Once the door is no longer connected to the frame.
Use a hammer and center punch to drive out the hinge pins if they are accessible.
By removing these screws you may be able to remove the lock and open the door.
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Step 2 take the door off its hinges.
Remove lock from door panel.