Domestic front-door locks haven't changed much for ... The cylinder pin tumbler lock, by Linus Yale of New York in 1848, uses Barron's double tumbler principle invented 70 ... Turning the key lifts ...

You try to open your front door but the key sticks as if you were pushing it into a wad of chewing gum. THE QUICK FIX Over time, lock tumblers can become misaligned and clogged with all kinds of gunk.

The Singgate FM109 is a great gate lock, designed for your metal gate instead of the wooden front door. In place of the common gate security box, the FM109 acts as both the lock and the gate handle.

A lock by any other name… From the dawn of civilization and conception of possession, humans have faced the desire to protect themselves and their belongings. While the basic need for security ...

But the Golden Gate Locks will present substantial challenges, which is why their engineering needs to begin soon. First, unlike most lock systems, they will have to operate against the natural ...

We didn’t lock our doors during the day. If there were people in the house, I would probably just lock the front door and go off. I didn’t bother to padlock the gate.