Residential & Commercial Security - Locks, Keys & Dead Bolts - removing a old Corbin lock with latch for deadbolt
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kpathatt
07-10-04, 12:56 PM
I have an old corbin lock I am trying to remove to repair. The problem is the lock has a turn key(?) so that the door can be locked from the inside.
I cannot remove this so it prevents removing the lock from the door. I can look into the keyhole to see the end of the turnkey. I wonder do I need a to punch it out? Any suggestions would help.
Thank you
Kpathatt
I cannot remove this so it prevents removing the lock from the door. I can look into the keyhole to see the end of the turnkey. I wonder do I need a to punch it out? Any suggestions would help.
Thank you
Kpathatt
schiejr
07-11-04, 04:43 PM
Were you able to get the knobs off? Does the plate with the thumbturn have a hole for the knob also? With screw holes?
It is possible on an old lock that a spindle may become stuck but we need to make sure you have everything else off or loose. A slight tap with a punch would be the way to go to loosen it (after using some lubricant) if everything is indeed loose. Hardware can also be held on by paint-score along the edges with a sharp knife if you think this may be the case.
It is possible on an old lock that a spindle may become stuck but we need to make sure you have everything else off or loose. A slight tap with a punch would be the way to go to loosen it (after using some lubricant) if everything is indeed loose. Hardware can also be held on by paint-score along the edges with a sharp knife if you think this may be the case.
kpathatt
07-12-04, 10:47 PM
yes, I can get the door knobs off. Yes everything is loose. Yes there is a hole for the door knob. I can move the lock around but only as much as the thumbturn will allow. I think punching out the turn key is my best bet , unless you have another suggestion. Also if I do tap out the thumbturn key how would it be put back so that it doesn't fall out ?
schiejr
07-13-04, 07:12 AM
The thumbturn is normally held on to the plate with a retainer of some sort so it should come off as a unit. The spindle of the thumbturn is square and mates to the square hole in the lock. It is rare for a thumbturn spindle to be stuck unless there is corrosion.
I am wondering if I am understanding correctly.
What are the dimensions of the lock on the edge of the door?
Is this an old lock that uses a skeleton key?
On a modern mortise locks, a plate with a thumbturn would have the thumbturn off center from the cylinder.
A mortise thumbturn would be directly opposite the cylinder on the outside and be screwed into the lock and held in by a set screw accessible from the edge of the door.
I am wondering if I am understanding correctly.
What are the dimensions of the lock on the edge of the door?
Is this an old lock that uses a skeleton key?
On a modern mortise locks, a plate with a thumbturn would have the thumbturn off center from the cylinder.
A mortise thumbturn would be directly opposite the cylinder on the outside and be screwed into the lock and held in by a set screw accessible from the edge of the door.