On a lock I often have to use on a charity rented room the keys are not in
the standard keypad order and are in two rows, so trying to get in when you
want to without sight can be a bit annoying to say the least!
Brian

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The Sofa of Brian Gaff...

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"Harry Bloomfield" wrote in message
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GB wrote on 31/05/2018 :
We have a night latch - one of these:
https://www.ironmongerydirect.co.uk/...-chrome-850075

What is the best way (ie easiest, not necessarily cheapest) to convert
this to combination lock?

The easiest way, is to use an electric one. You would need to replace the
part which fixes onto the door frame (the latch ?), with a solenoid
operated version, then add a suitable keypad and logic somewhere near the
door.

I have one on the small side door of my garage. Which operates on 18v DC
from memory. You can set it with 6 to 8 number /letter code entry, with
four different user codes and a master code. So four different people
could have their own different entry code, one person leaves the company,
so just their code needs to be changed to a new one for a new person.

Type one of the correct codes in and power is applied to the latch to
release it it hinge out of the way, but only for a preset few seconds when
it re-locks. A normal Yale type key can also be used as usual.

I got fed up of needing a key to get into my garage/workshop, so added
this instead. Now I just need to remember the entry code. I get in fine,
if I do it without thinking, but struggle to remember the code if I think
about it :-?