While his question is about safes, it's not about opening them without the key or combination, so I hope it can stay here...

Here's my problem:
I have a small (German) safe with a lever lock that connects directly to the bolts. One full turn of the key moves the bolts by about 1 inch.
Now I would like to convert it, using an electronic combination lock. I acquired an (American) LaGard 'deadbolt' lock, which should have a similar functionality - yet the 'deadbolt' only moves by about 1/3 inch!
Now - I doubt that these locks are used to directly drive bolts (except for maybe in a small key cabinet or locker or something like that.)
So my question is: How are American safes built with respect to the lock-bolt connection? Can you point me to some picture or drawing that would help me to make something similar myself? Maybe using a lever to translate the small movement of the lock's deadbolt to a larger movement of the safe's bolts?
Thanks,
mh