Trump: Classroom doors should be hardened to make them lockable from the inside

[BumRushDaShow]

21. They called that (and probably do still call it) "double-cylinder" deadbolt locks

which may be similar to what you are talking about.

My parents had those on every entrance/exit door in the house and each door lock had its own key and also had keyed door knobs (exterior only) as well.

I.e., every "top lock" for the front doors (we had one front door to the sun porch and then another front door from the sun porch to go outside), the back door, AND the basement door (that led to a well with steps up to the backyard level that had a well cover over it with a slide latch bolt to lock it from the inside), had to be locked from the inside or the outside with a key. The bottom locks on all of those doors were various single cylinder dead bolts keyed on the outside but with a thumb turn thingy on the inside.

We even had keyed storm doors (keyed for opening from the outside when locked and with a slider switch to lock it on the inside) for each entrance/exit door. So every primary door had 3 keys.

At night when we "locked up", we had to use the key to do it on any (top lock-) unlocked door from the inside.