Antiqueight@kithrup I'm pretty sure there is a lock that will do that, but I'd get a locksmiths version of the answer. Other than it being a knob (which, if it has a handle at all, I hate, you can't open a knob with your elbow).. i can't see why it would be a problem, in theory some of the nightlatches would do that, I'd think. They certainly have the general structure. But most of the actual locks i know are decades old.
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